The relationship between speed, distance, and time is described using the formula speed distance time. An object traveling 10 miles in 5 minutes averages 120 miles per hour.
What is speed divided by distance?10 miles were covered in total.
It took five minutes in total.
The formula can be used to determine the speed.
s = d/t
s being the speed
D stands for distance.
The amount of time used
Let's change the known variables in the equation above to get
s = 10/5
= 2 miles/minute
However, we must convert the speed to miles per hour in order to use it.
s=2 x 60 miles per hour
120 miles per hour.
An object traveling 10 miles in 5 minutes averages 120 miles per hour.
Consequently, the typical speed is 120 miles per hour.
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a stone is tied to a string and whirled in a vertical circle at a radius. which of the following cannot be true?
The stone is travelling in a straight line can not be true in a vertical circle at a radius.
What is vertical circle?
A vertical circle is a path that follows a vertical line in a three-dimensional space. It is a type of circular trajectory, with the center point of the circle vertically above or below the starting and ending points of the path. Vertical circles are used in mathematics and engineering to describe the motion of objects in space. The path of a vertical circle is a helix, which is a spiral with a constant radius, and can be defined by a parametric equation. Vertical circles can be used to define the motion of a satellite, or an aircraft in a corkscrew maneuver. In terms of physics, a vertical circle is an example of a non-uniform circular motion, as the speed of the object changes throughout the path.
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Complete Question
a stone is tied to a string and whirled in a vertical circle at a radius. which of the following cannot be true?
A) The stone is travelling in a straight line
B) The stone is travelling in a circular path
C) The stone is travelling at a constant speed
D) The stone is travelling in an elliptical path
Would a cart that has four solid disks for wheels have a final speed that is greater than, less
than, or equal to the final speed of a single disc that has the same mass as the cart and
wheels? Explain.
The final speed will be equal because they are independent of mass and radius.
How does bulk affect speed?Not directly, mass has an impact on speed. It establishes how quickly an object can increase its velocity (accelerate) in response to a specific force. Faster changes in speed under the same force require less time for lighter objects.At the same rate, both objects descend. If just gravity is operating on an object as it falls, mass has no bearing on how fast it travels.Speed is equal to |w|R, which is equal to the difference between the arc length traveled (S) and the change in time (t). Additionally, the radius times the absolute value of the angular displacement (||) is what determines the arc length (S) (R).To learn more about speed refer to:
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The demand for the lighting of a small village is 50 A at 200 V. This is supplied from a dynamo
of a distance station. The generated voltage being 220 V. Compute the following:
B2.1 Resistance of the leads from the dynamo to the village
B2.2 The number of units of energy (kwh) consumed in 10 hours in the village
B2.3 The number of units of energy (kwh) wasted in the leads in the same time
B2.4 Draw the equivalent circuit of the power suppl
(1) The resistance of the leads from the dynamo to the village is 4.4 ohms.
(2) The number of units of energy consumed in 10 hours in the village is 100 kWh.
(3) The unit of energy wasted in the leads in the same time is 11 kWh.
What is the resistance of the circuit?
The resistance of the leads from the dynamo to the village is calculated by applying the following formula.
V = IR
R = V / I
where;
V is the voltage suppliedI is the currentR = ( 220 V ) / ( 50 A )
R = 4.4 ohms
The unit of energy consumed in 10 hours is calculated as follows;
P = IV
P = 50 x 200
P = 10,000 W = 10 kW
In 10 hours, E = Pt
E = 10 kW x 10 hrs
E = 100 kWh
The unit of energy wasted in the leads in the same time;
E = I²R
E = ( (50² ) x ( 4.4 ) ) / 1000
E = 11 kWh
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The drawing shows an edge-on view of two planar surfaces that intersect and are mutually perpendicular. Surface 1 has an area of 1.5 m2, while surface 2 has an area of 3.6 m2. The electric field E in the drawing is uniform and has a magnitude of 252 N/C.(a) Find the electric flux through surface 1.________________ N·m2/C(b) Find the electric flux through surface 2._________________N·m2/C
The drawing shows an edge-on view of two planar surfaces that intersect and are mutually perpendicular. Surface (1) has an area of 1.70 m².
What do you know about Surface?Surface is a line of tablet computers developed by Microsoft and sold under their brand. Surface tablets have a 10.6-inch wide touch screen display and come with USB support, dual Wi-Fi antennae, a built-in kickstand to make the tablet stand up by itself and an optional keyboard that doubles as the tablet's cover.
What does Surface mean in tech?A surface computer is a computer which interacts with users through an ordinary object instead of through monitor and keyboard. Commands are input through the use of bare hands by touching or dragging the surface .
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the formula gives the time it takes in seconds, t, for a pendulum to make one full swing back and forth, where l is the length of the pendulum, in feet. to the nearest foot, what is the length of a pendulum that makes one full swing in 1.9 s? use 3.14 for . ft
Answer:
3 ft
Explanation:
You want the length of a pendulum that has a period of 1.9 seconds.
Pendulum periodThe period of a pendulum is given by the formula ...
T = 2π√(L/g)
LengthSolving for the length, we find ...
L = g(T/(2π))²
Using the given period, we find the length to be ...
L = (32 ft/s²)(1.9 s/(2·3.14))² ≈ 2.93 ft ≈ 3 ft
To the nearest foot, the length of the pendulum is 3 ft.
Using the exact exponential treatment, find how much time is required to charge an initially uncharged 100-pF capacitor through a 75.0-M Ω resistor to 90.0% of its final voltage.
17.3 ms are needed to charge a 100-pF capacitor to 90.0% of its ultimate voltage after passing it through a 75.0-M resistor.
What function does a capacitor serve?
a capacitor is an electrical energy storage device that consists of two conductors that are isolated from one another and placed near to one another. A straightforward illustration of one such storage device is a parallel-plate capacitor.
What is a capacitor and how does it work?
In an electrical circuit, a capacitor is a component that is used to hold charges. A capacitor operates under the premise that when an earthed conductor is moved close to a conductor, its capacitance increases noticeably.
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FILL IN THE BLANK Before driving, you should check for these things: obstructions behind the car, ____, and which direction your vehicle's wheels are turned.
Before driving, you should check for these things: obstructions behind the car, leaking fluids, and which direction your vehicle's wheels are turned.
Driving Safety:
Safe driving is important not only for the driver, but also for everyone involved inside and outside the vehicle, such as pedestrians and other road users.
Driving safely includes what you do before, during and after driving a vehicle to ensure your safety.
SAFETY TIPS BEFORE DRIVING
Before you drive, make sure that:There are no obstacles behind the vehicle and the road is clearThere are no fluid leaks Brakes and clutches are functioning properly to avoid fires and other accidents.Which direction should the vehicle wheels be turned to properly turn the steering wheel in the correct direction.Please adjust your seat.Adjust the mirrors (rear and side). Adjust the steering wheel so you can reach all controls and have a clear view of the road.Please adjust the headrest.Fasten your seat belt and adjust to a comfortable and safe position. Make sure all passengers are in the vehicle and have their seatbelts fastened. Start the engine, check your car's fuel level, and watch for warning lights on your dashboard. If the warning light is on, please refer to the following link: It explains the various warning lights on the dashboard, what they mean, and what to do before driving.Drive responsibly and safely.Therefore, Before driving, you should check for these things: obstructions behind the car, leaking fluid, and which direction your vehicle's wheels are turned.
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If the electric field is zero throughout a certain region of space, is the potential also zero in the region?
No, the gradient of the potential is the field. Therefore, in any area where the potential is constant, the electric field is zero. Constant does not always equate to zero.
What does a point's electric field appear like in space?The force per unit charge that an infinitesimally small positive test charge would experience if held fixed at a given point in space is the concept of the electric field at that location.
Is there no electric field in a vacuum?According to Gauss's law, the divergence of the electric field and the enclosed surface integral of the electric field are both zero in a vacuum, which is the absence of electric charges. Electric potential and electric field are both 0 at infinity if only a single point is taken into consideration.
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Two rocks weighing 5 newtons and 10 newtons, respectively, fall freely from rest near the Earth's surface. After 3 seconds of free-fall, compared to the 5 newton rock, the 10-newton rock has greater:(1 ) acceleration(2 ) height(3 ) momentum(4 ) speed
After 3 seconds of free-fall, compared to the 5 newton rock, the 10 newton rock has greater momentum.
We have 4 options:
1) Acceleration
This option is not correct as the two rocks will have the same acceleration due to the fact that air friction is neglected.
2) Height
This option is not correct as both the rocks are freely falling from rest near Earth's surface at the same rate. Heights will be same.
3) Momentum
This option is correct as rocks have same velocity but different masses. Momentum can be be written as:
p = mv,
where p: Momentum
m: Mass
v: Velocity
Therefore, momentum of 10 newton rock will be greater in magnitude than momentum of 5 newton rock.
4) Speed
This option is not correct as both rocks have same acceleration. Hence, their speeds will be the same.
Therefore, option 3) Momentum is correct.
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Suppose a cart with four wheels and a disk whose mass is equal to the total mass of the cart roll down the ramp. Which, if either, has more gravitational potential energy at the top?
more of its gravitational potential energy becomes translational kinetic energy and less becomes rotational. slides down the ramp without friction.
What is the formula for kinetic energy?= 1/2 m v2 Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.
What are the factors affecting potential and kinetic energy respectively?The amount of potential energy depends on the object's mass, the strength of gravity and how high it is off the ground. When you drop the object, this potential energy is converted into kinetic energy, or the energy of motion. Kinetic energy depends on an object's mass and its speed.
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Its elastic acceleration energy is converted more into translational kinetic energy than into rotational energy. glides without resistance down the ramp.
What is the kinetic energy equation?= 1/2 m v2 The relationship between kinetic energy and an object's mass and square from its velocity is direct: K.E. = 1/2 m v2. The kinetic energy is measured in g / kg body equation per second squared if the mass is measured in kilograms or the velocity is measured in meters per second.
What variables impact kinetic and potential energy, respectively?The mass, gravitational pull, and height above the earth all affect how much potential energy an item has. This amount of energy is transformed into kinetic energy, and or energy that moves an item when it is dropped.
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find it difficult to answer
The position of the body at time t is s (t) = -3 + 2t - 2 sin(2t³).
What is the position of the body at time t?The position of the body at time t is calculated by applying the second kinematic equation as shown below.
s = s₀ + vt + ¹/₂at²
where;
v is the initial velocitys₀ is the initial positiona is the acceleration t is the timeThe position at time t is calculated as;
s (t) = -3 + 2t + ¹/₂( - 4sin 2t )t²
s (t) = -3 + 2t - 2 sin(2t³)
Thus, the final position of the body is a function of the acceleration, initial velocity and time of motion of the body.
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Two boys A and B are applying force on a block. If the block moves towards the boy A, which one of the following statements is correct? (1 mark) (a) Magnitude of force applied by A is greater than that of B. (b) Magnitude of force applied by A is smaller than that of B. (c) Net force on the block is towards B. (d) Magnitude of force applied by A is equal to that of B
Two boys A and B are applying force on a block (a) Magnitude of force applied by A is greater than that of B one of the following statements is correct.
How does Newton's law define magnitude?The formula for force is mass times acceleration, according to Newton's second equation of motion. Thus, it provides the force's magnitude, as we might state.
Magnitude is simply "distance or amount," according to the definition given in physics. It shows how an item moves while it is in motion, whether that movement is absolute, relative, or of a certain magnitude.
By deducting the bigger force's magnitude from the smaller force's magnitude, you may get the resulting force. The smaller force's direction of application matches that of the resulting force.
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Suppose a constant force acts on an object. The force does not vary with time or with the position or the velocity of the object. Start with the general definition for work done by a force F.dr and show that the force is conservative. (b) As a special case, suppose the force F= (3i+4j)N N acts on a particle that moves from O to C in above figure. Calculate the work done by F on the particle as it moves along each one of the three paths shown in the figure and show that the work done along the three paths is identical.
The force is independent of time, the object's position, and its velocity. start with the definition of jobs completed by a force in general The force is conservative, as demonstrated by F.dr. = 15.0J+20.0J=35.0J
What is meant by velocity?The displacement an object / particle experiences with regard to time is expressed vectorially as velocity. The meter per second (m/s) is the accepted unit of velocity magnitude, sometimes referred to as speed. Alternately, velocity magnitude can be expressed in centimeters per second (cm/s).
Who made the discovery of velocity?By calculating the average speed over a brief period of time that includes the instant in question, one can estimate the speed of a point anywhere at given instant. For precisely calculating the values of a instantaneous velocity, Isaac Newton developed the differential calculus.
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Given the sequence of nucleotides in this DNA strand: GTCCGA, what should the corresponding strand of DNA read?
A small bead with a mass of 150 g slides along a semicircular wire with a radius of 20 cm that rotates about a vertical axis at a rate of 3 revolutions per second. Find the value of θ for which the bead will remain stationary relative to the rotating wire. (Assume the bead slides without friction.)
The value of θ for which the bead will remain stationary relative to the rotating wire while assuming bead slides without friction is 2π radians.
For the bead to remain stationary relative to the rotating wire, the centripetal force provided by the wire must be balanced by the gravitational force acting on the bead. The gravitational force acting on the bead is given by the weight of the bead, which is:
Fg = mg
where m is the mass of the bead (150 g) and g is the acceleration due to gravity (9.8 m/s^2).
The centripetal force provided by the wire is given by:
Fc = mv^2 / r
where m is the mass of the bead, v is the velocity of the bead and r is the radius of the wire (20 cm).
For the bead to remain stationary relative friction to the wire, the gravitational force must equal the centripetal force.
mg = mv^2 / r
The velocity of the bead v is related to the angular velocity of the wire by v = r * ω
where r is the radius of the wire, and ω is the angular velocity of the wire (3 revolutions per second)
so we can substitute v = r * ω in the previous equation:
mg = m(r * ω)^2 / r
mg = mr^2 * ω^2
g = r * ω^2
Now we can find the angle θ for which the bead will remain stationary relative to the rotating wire by using the fact that:
θ = ω * t
where θ is the angle in radians, ω is the angular velocity and t is time in seconds. We know that the angular velocity of the wire is 3 revolutions per second, which is equal to 3*2π radians/second. We also know that the bead is on the wire's semicircle, so the bead will complete half a revolution in a time of 1/3 second.
So, the angle θ = ω * t = 3*2π * 1/3 = 2π radians
So, the bead will remain stationary relative to the rotating wire when it is at an angle of 2π radians (360 degrees) from the vertical axis of rotation.
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Three particles have the following masses ( in multiples ofm0) and move on three different circles with thefollowing speeds (in multiples of v0) and radii (inmultiples of r0):
Particle Mass Speed Radius
1 m0 2v0 r0
2 m0 3v0 3r0
3 2m0 2v0 4r0
Rank the particles according to the magnitude of thecentripetal force that acts on them, largest first.
The particles according to the magnitude of the centripetal force that acts on them, largest first is ranked as:
1 m₀ 2v₀ r₀
2 m₀ 3v₀ 3r₀
3 2m₀ 2v₀ 4r₀
What is the fundamentals to rank particles based on centripetal force?Even if travelling at a constant speed around the circle's edge, there will still be a change in velocity and, consequently, an acceleration. Towards the circle's centre, this acceleration is being applied. Furthermore, according to Newton's second law of motion, any object that experiences acceleration must also be subject to a net force. The acceleration's direction matches that of the net force.
Accordingly, an inward force must be acting on an object for it to accelerate inward when it is moving in a circle. The centripetal force requirement is a term that is occasionally used to describe this. Centripetal refers to something that seeks its centre. There is a net force acting towards the centre of an object moving in a circle.
Ranking particles based on centripetal force would be easy as we only have to follow the calculation.
Centripetal force has the following mathematical form:
[tex]$ \mathrm{ F = \frac{mv^2}{r}}[/tex]
Lets assume Particle Mass, Speed and Radius are all = 1
So,
1) [tex]\mathrm{m_0 \ 2v_0 \ r_0}[/tex]
[tex]$ \mathrm{ F_1 = \frac{m2v^2}{r}}[/tex]
[tex]$ \mathrm{ F_1 = \frac{(1)2(1)^2}{1} = 2}[/tex]
2) [tex]\mathrm{m_0 \ 3v_0 \ 3r_0}[/tex]
[tex]$ \mathrm{ F_2 = \frac{m3v^2}{3r}}[/tex]
[tex]$ \mathrm{ F_2 = \frac{(1)3(1)^2}{3} = \frac{3}{3} = 1 }[/tex]
3) [tex]\mathrm{2m_0 \ 2v_0 \ 4r_0}[/tex]
[tex]$ \mathrm{ F_3 = \frac{2m2v^2}{4r}}[/tex]
[tex]$ \mathrm{ F_3 = \frac{2(1)2(1)^2}{4} = \frac{4}{4} = 1 }[/tex]
As,
2 > 1 ≥ 1
We can rank them as,
1 m₀ 2v₀ r₀
2 m₀ 3v₀ 3r₀
3 2m₀ 2v₀ 4r₀
m is the object's mass, v is its speed or velocity, and r is its radius, where F is the centrifugal force.
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Complete question:
TRUE/FALSE. without the force of friction, people would not be able to walk. please select the best answer from the choices provided.
People couldn't walk if it weren't for the force of friction. Please select the response that, among the given options, is truest.
the statement is true.
What do you call friction?A solid thing cannot move over another solid object without encountering friction. The four basic types of friction are fluid friction, rolling friction, sliding friction, and static friction.
How does friction in Example work?Friction is defined as the rubbing of two bodies together. the resistance to relative motion of two bodies in contact, such the friction of sandpaper on wood. Oil lowers friction in an automobile engine.
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Newton's third law of motion states that for every action there is an equal and opposite reaction. The balloon travels in the opposite direction as the air escaping from it. So when gas is released from the balloon it pushes against the outside air and the outside air pushes back. As a result of this the rocket is propelled forward by the opposing force. This opposing force is thrust.
The law working behind the balloon moving forward when the air escapes from it is Newton's Third Law of Motion.
Newton's Third Law of Motion states that for every action in nature, there is an equal and opposite reaction. If object A exerts a force on object B, object B also exerts an equal and opposite force on object A.
When a fully inflated balloon is released, the air molecules coming out of the balloon to strike the outside air molecules or it pushes the outside air molecules and the outside air molecule pushes the balloon back. The force experienced by the balloon is called thrust.
This is the same principle used for the movement of Rockets in space.
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A mass is oscillating on a frictionless surface at the end of a horizontal spring. Where, if anywhere, is the acceleration of the mass zero.a. At x = -Ab. At x = 0c. At x = +Ad. at both x = -A and x = +Ae. nowhere
If mass is oscillating on a frictionless surface at the end of a horizontal spring, then option B states that the acceleration of the mass is zero at x=0 everywhere.
What is acceleration?The rate at which an object's velocity with respect to time changes is referred to as acceleration in mechanics. They are vector quantities, accelerations. The direction of the net force acting on an object determines the direction of its acceleration. The rate at which velocity changes is called acceleration. Acceleration typically indicates a change in speed, but not always. An object that follows a circular path while maintaining a constant speed is still moving forward because the direction of its velocity is shifting. A point or object moving straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is constantly shifting.
Here,
When mass is oscillating on a frictionless surface at the end of a horizontal spring, the acceleration of the mass is zero at x=0, which is option B.
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A person is riding their bicycle along a straight road at a speed of 7.9 m/s. In total, they have a mass of 88 kilograms. What is the kinetic energy, in joules, of the person with their bicycle?
The cyclist's kinetic energy, measured in joules, is 2746.04 J. 125 Joules are the same as the kinetic energy, or (1/2 * 10 kg) * 5 m/s2.
How is kinetic energy calculated?The energy that drives motion is known as kinetic energy (KE). Kinetic energy is the force that drives motion. The mass and speed of an object moving determine how much kinetic energy it has.
How can kinetic energy be calculated given mass and speed?According to classical physics, kinetic energy (KE) is determined by multiplying the mass of an item by the square of its velocity, or 1/2*m. As an illustration, consider an object having a mass of 10 kg (m = 10 kg) and a speed of 5 m/s (v = 5 m/s).
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if the acceleration was constant for two seconds, what happened to the acceleration from 1 to 2 secdons
If the acceleration was constant for two seconds, that means that the acceleration did not change from 1 to 2 seconds.
Constant acceleration means that the rate of change of velocity is the same over a certain period of time. Therefore, from 1 to 2 seconds, the acceleration remained the same. The velocity of an object will change with time if the acceleration is constant.
The acceleration is the rate of change of velocity per unit of time, so if the acceleration is constant, the velocity changes at a constant rate. In this case, the object's velocity will be increasing at a constant rate during the time interval from 1 to 2 seconds.
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In the figure below, ammonia gas t hydrochloric acid gas diffuse & react a)state and explain the observations made after. some time. If the experiment was performed performed at high temp you will expect it to take longer for shorter time to form a white deposit. Explain
Explanation:
The reaction you are describing is the reaction between ammonia gas (NH3) and hydrochloric acid gas (HCl). When these two gases come into contact, they diffuse and react to form a white solid deposit of ammonium chloride (NH4Cl).
If the experiment was performed at high temperature, you would expect it to take a shorter time for the white deposit to form. This is because at higher temperatures, the gases will have more kinetic energy and move faster, increasing the rate of collision between the gases and therefore the rate of the reaction. As a result, the white deposit will form more quickly at high temperatures than it would at lower temperatures.
It's also important to note that the rate of reaction also depends on the concentration of the reactants. So if the concentration of the reactants is increased, the reaction rate will increase and the white deposit will form faster.
In summary, the reaction between ammonia gas and hydrochloric acid gas forms a white solid deposit of ammonium chloride. The rate of reaction is affected by temperature and concentration of reactants, at higher temperatures and higher concentration, the white deposit will form faster.
The fundamental order and arrangement of structure, control layers and cladding in building enclosures is:
a. the same regardless of climate zone, precipitation exposure, indoor climate class, and building energy profile type.
b. dictated exclusively by the climate zone.
c. entirely determined by the precipitation exposure.
d. strongly influenced by the indoor climate class.
e. for the most part a function of the building energy profile type.
The fundamental order and arrangement of structure, control layers and cladding in building enclosures is strongly influenced by the indoor climate class.
What is the difference between structure, control layers, and cladding in a building enclosure? A building enclosure is a combination of components that enclose a building and protect it from the elements. Structures, control layers, and cladding are all components of a building enclosure. Structures are the components of a building that provide the necessary strength and stability to the structure. This includes framing, floors, walls, and roofs. Control layers act as a barrier to moisture and air infiltration. These layers include insulation, air barriers, and house wraps. Cladding is the outermost layer of a building enclosure, and provides aesthetic appeal, as well as additional protection from the elements. This layer typically consists of siding, stucco, brick, and other exterior finishes. All of these components of a building enclosure work together to protect the building from the elements and provide a comfortable living space within. Structures provide the necessary strength and stability, control layers provide barriers to moisture and air infiltration, and cladding provides a protective layer that also adds aesthetic appeal.To learn more about cladding refer to:
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The mineral hematite has a density of 5.25 g/cm^3. The mineral magnetite has a density of 5.15 g/cm^3. You find a rock that could be either magnetite or hematite. Taking the rock back to the lab, you measure its volume to be 53 cm^3 and its mass to be 276 g. Do you know the volume and mass with enough precision to determine if the rock is either hematite or magnetite? Which mineral do you think it is?
Common iron-oxides like magnetite and hematite can be found in sedimentary, metamorphic, and igneous contexts and are linked to a wide range of deposit types.
In what mineral are magnetite and hematite found?Hematite, which is the most prevalent type of iron oxide in the earth's crust, is a chemical compound consisting of oxygen and iron (Fe2O3). Magnetite is another type of it (Fe3O4).
Hematite versus magnetite: which is the better iron?The purest iron ore, magnetite, has an extremely high iron content of up to 70%. Excellent magnetic properties make it very useful in the electrical industry. Hematite ore is the most important industrial iron ore in terms of utilisation, however it contains somewhat less iron than magnetite.
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Two point charges are separated by 7.0 cm . The attractive force between them is 18 N . Suppose that the charges attracting each other have equal magnitude.
- Rearrange Coulomb's law and find the magnitude of each charge.
According to the above statement, each charge has a magnitude of 2.23μC according to Coulomb's law.
What does Coulomb's law aim to achieve?When two items behave as point charges, the force between them may be accurately described by the Coulomb's law equation. When interacting with other charged objects, a spent conducting sphere behaves as though its whole charge were concentrated in its center. According to Coulomb's law, the force F between two triangular charges, Q1 and Q2, in a void is proportional to the inverse of their separation, r, and proportional to their product, Q1.
Coulomb's law states:
F = KQ²/r²
18 = (9*10⁹)*Q²/0.07²
Q = 2.23*10⁻⁶C or 2.23 μC
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The two ropes seen in (Figure 1) are used to lower a 255 kg piano exactly 7 m from a second-story window to the ground.
A) How much work is done by w⃗ ?
B) How much work is done by T⃗ 1?
C) How much work is done by T⃗ 2?
Work done by [tex]\overrightarrow w[/tex]= 255 kg x 9.8 m/s² x 7 m = 17,890 J, while work done by [tex]\overrightarrow T[/tex] 1 = 0 = perpendicular to displacement of piano.
What is work and displacement?Work and displacement are two terms related to physics. Work is a measure of energy and is defined as the amount of energy transferred to an object when a force is applied to it over a certain distance. In other words, work is the result of a force acting on an object over a distance. Displacement is a measure of the change in position of an object over a given distance, which is the difference between the initial and final positions of the object.
A) The work done by [tex]\overrightarrow w[/tex] is 7m × 255kg × 9.81m/s² = 17,570 joules.
B) The work done by [tex]\overrightarrow T[/tex] 1 is 7m × 255kg × 9.81m/s² × cos(30°) = 13,177 joules.
C) The work done by [tex]\overrightarrow T[/tex] is 7m × 255kg × 9.81m/s² × cos(60°) = 4,393 joules.
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Complete question:
The velocity of a machine element over a 10 second period is:
V=2.5t m/s 0
V=10 m/s 4
If the element represents aerodynamic drag, approximated by the characteristic F=CV^2 determine the power absorbed as a function of time, and the total energy dissipated if C= 1.0 N-s^2/m^2
The total energy dissipated over a 10 seconds period is 78125 Joules.
What is power that absorbed as a function of time?The velocity of the machine element over a 10 second period is represented by the equation V = 2.5t m/s, where t is the time in seconds.The aerodynamic drag on the element is approximated by the characteristic equation F = CV^2, where C is a constant (1.0 N-s^2/m^2 in this case) and V is the velocity of the element.To determine the power absorbed as a function of time, we can multiply the force of drag by the velocity: P = FV = CV^3.Substituting in the given values, we get P = (1.0 N-s^2/m^2)(2.5t m/s)^3 = 31.25t^3 WTo determine the total energy dissipated, we can integrate the power over the time period of 10 seconds: E = ∫Pdt from 0 to 10 seconds.Substituting in the given power equation, we get E = ∫(31.25t^3) dt from 0 to 10 seconds.Solving the integral gives E = (31.25/4)t^4 from 0 to 10 seconds.Substituting t = 10 in the above equation, we get E = 31.25 * 10^4/4 = 78125 J (Joules)So, the total energy dissipated over a 10 seconds period is 78125 Joules.To learn more about power refer:
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b. consider the circuit at right. all of the bulbs in the circuit are identical. assume that the battery is ideal. the switch is initially closed. rank the brightness of the four bulbs from brightest to dimmest. if two or more bulbs are equal in brightness, indicate that in your ranking. please put your response in parentheses. for example: (a
The resistance of parallel connection will grow as soon as the switch is opened, increasing the bulb network's overall equivalent resistance. Ohm's law states that with constant battery voltage, the current flowing through bulb A—which is equivalent to the network's overall current—will drop.
What purposes might Ohm's law serve?Ohm's law is employed to verify the fixed values of circuit elements such voltage supplies, voltage dips, and current levels.
What exactly does Ohm's law say?The current through with a resistor between two places is directly proportionate to the voltage from across two points, according to Ohm's law.
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a cyclist rides 6.8 km east for 19.4 minutes, then he turns and heads west for 4.1 km in 5.8 minutes. finally, he rides east for 15.3 km, which takes 38.6 minutes. take east to be the positive direction.(a) What is the final displacement of the cyclist? (b) What is his average velocity?
A cyclist rides 8.0 km east for 20 minutes, then he turns and heads west for 8 minutes and 3.2 km. Finally, he rides east for 16 km, which takes 40 minutes.
What is the difference between a bicyclist and a cyclist?A cyclist (or bicyclist) is someone who rides a bicycle. A biker is someone who rides a motorcycle. These terms are an ongoing subject of controversy, especially in cyclist circles.
Is it called biking or cycling?Bicycle magazines seem to use the word biking to refer to the act of riding a motor bicycle. However, some observed that cycling is used by more formal writers, while biking is usually part of a more informal and colloquial language.
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a system that consists of a single spring stores a total elastic potential energy e when a load is added to the spring. another identical spring connected in parallel is added to the system. the same load is now applied to the parallel springs.
The spring is added to a system that uses just one spring to store an entire elastic potential load. A second identical spring was attached to the system.
How can you tell whether a spring is in series or parallel?When a load is applied to a system made up of a single spring, the system's total elastic potential energy, e, is stored. The system is expanded by adding a second similar spring connected in parallel. The parallel springs are now subjected to the same load.
More broadly, two or more springtime are in sequence when any stressor given to the ensemble applies to each spring with changing magnitude, and the extent of strain (deflections) of the ensembles is equal to the total of the strains of the springs.
In a sentence, what does the word "parallel" mean?Repetition of a specific grammar form within a sentence is known as parallel structure (also known as parallelism). A parallel construction is made when all of the items or concepts being compared in a sentence adhere to the same grammatical structure. Example False Parallel: In addition to midday naps, Ellen enjoys hiking and attending rodeos.
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