Answer:
b.Both are directly meant to make human lives easier.
c.Both are concerned with improving humanity's amount of knowledge.
What is the standard unit for length Mcq?.
A meter is the metric system's standard unit of length (m). One meter (m) is divided into 100 equal centimeters (cm).
What is SI unit?The International System of Units, abbreviated SI in all languages and sometimes pneumatically as the SI system, is the modern version of the metric system and the world's most widely used measurement system. The SI is a coherent system of measurement that begins with seven base units: the second (symbol s, the unit of time), the metre (m, length), the kilogram (kg, mass), the ampere (A, electric current), the kelvin (K, thermodynamic temperature), the mole (mol, amount of substance), and the candela (cd, luminous intensity). These are widely accepted and followed around the world. The SI unit for mass is kilogram, the SI unit for length is meter, and the SI unit for time is second.
Here,
A meter is the standard unit of length in the metric system (m). One meter (m) is equal to 100 centimeters (cm).
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Analyze the formula FG = mg to explain how an object's weight can change even when its 'mass remains constant.
The formula FG = mg relates an object's weight (FG) to its mass (m) and the acceleration due to gravity (g). The weight of an object is the force exerted on it by gravity and is measured in newtons (N). The mass of an object is a measure of its inertia, or the amount of matter it contains, and is measured in kilograms (kg). The acceleration due to gravity is a constant value that is approximately 9.8 m/s^2 on the surface of the Earth.
According to the formula, the weight of an object is directly proportional to its mass and the acceleration due to gravity. Therefore, if the mass of an object remains constant, any changes in its weight can only be caused by changes in the acceleration due to gravity.
For example, an object weighs 10 N on the surface of the Earth, but if you take it to a planet where the acceleration due to gravity is less, the weight of the object will decrease, even though its mass remains the same. The same applies to the opposite, If you take the same object to a planet where the acceleration due to gravity is higher, the weight of the object will increase, even though its mass remains the same.
In summary, the formula FG = mg shows that an object's weight is directly proportional to its mass and the acceleration due to gravity. If an object's mass remains constant, any changes in its weight can only be caused by changes in the acceleration due to gravity.
A ball of ma 0. 2kg i projected horizontally into a vertical wall with the peed of 34m/ the ball make contact with the wall for 0. 3 econd and bounce horizontally with the peed of 26m/ calculate the change in momentum of the ball and the average force exerted on the ball during it' colliion with the wall
The average force exerted on the ball during the collision is 5.3 Newtons.
What is force?Force is a concept in physics that describes the interaction between two bodies. It is a vector quantity, meaning it has both a magnitude (amount of force) and a direction. Force can cause a change in an object's shape, speed, and direction of motion. Examples of forces include gravity, friction, tension, and electromagnetic forces. Forces can be used to push, pull, twist, and bend objects. Force is measured in newtons (N), and is the product of mass and acceleration. Force is an essential part of understanding the universe and how objects interact with each other.
Momentum is defined as mass multiplied by velocity,
and thus the initial momentum of the ball is 0.2 kg x 34 m/s = 6.8 kg m/s. After the collision, the momentum of the ball is 0.2 kg x 26 m/s = 5.2 kg m/s.
Thus, the change in momentum is 6.8 kg m/s - 5.2 kg m/s = 1.6 kg m/s.
The average force exerted on the ball during the collision can be calculated by dividing the change in momentum by the time of the collision:
Average force = 1.6 kg m/s / 0.3 s = 5.3 N.
This means that the average force exerted on the ball during the collision is 5.3 Newtons.
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help!!
Which of the following statements are examples of how technology improves human lives? (Choose all that apply)
a.String theory may soon explain universal phenomena like mass, charge, and gravity.
b.The development of leaded gasoline caused large amounts of heavy metals to be released into the air.
c.Computers allow people to communicate with each other quickly, and over great distances.
d.Improvements in airplane design have made travel cheaper and more accessible.
e,The discovery of nearby galaxies taught us a lot about the shape and behavior of our galaxy.
f.Medical diagnostic equipment can detect diseases sooner and more easily.
Answer: c
Explanation:
I say "C" because we use technology to communicate over long distances instantly, so we have progressed in making rockets, shoes, health/high gene, etc.
Technology is a branch of science which enables human life make easier with practical purposes. Technology improve human life in many way. c,d ,e and f these all improves human life by technology development.
Computers discovers new life to human life daily activities communication over the great distance , research and acess tons of information at fingertips. Computer has open source and cheap. Airplanes wipes the travel barrier for longer distance. We can travel longer distances with in hours.
Discovery of nearby galaxies gives lot of information about our galaxy shapes and nature of universe. One of best invention in human history is medical diagnostics, which enables human to detect diseases at early stages give better treatment to save life.
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you push two identical bricks across a tabletop with constant speed. in case 1, you place the bricks end to end; in case 2, you stack the bricks on top of the other. (a) is the force of kinetic friction in case 1 greater, less, or equal to the force of kinetic friction in case 2? (b) explain why.
(a) the force of kinetic friction in case 1 is equal to the force of kinetic friction in case 2. (b) because the normal force is the same in the two cases, and friction is independent of surface area.
How does kinetic and static friction differ?Kinetic and Static Friction The friction that exists between two systems when they are in touch and immobile with respect to one another is concerning as static friction. Kinetic friction is friction that occurs when two systems are in contact and moving about one another.
What factors affect kinetic friction?There are just two variables that affect the kinetic friction force acting on a moving object: the normal force and the coefficient of friction between the two surfaces.
Is kinetic friction consistently favorable?Motion is constantly resisted by kinetic friction. As a result, it always behaves in the opposite direction of motion and is therefore negative with regard to the surface.
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What are the 4 ways to solve an equation?.
Four ways of solving an equation are 1) Graphical method 2) Elimination method, 3) Substitution method 4) Cross multiplication method
Graphical method: To solve linear equations graphically, first draw the graph for both equations in the same coordinate graph and locate the intersection point on the graph.
Elimination method: In this method, any of the coefficients is first eliminated by equating. After eliminating the coefficient, the equations are resolved to get the other equation. For example:
3x + 2y = 9 ———–(i)
x – y = 6 ———–(ii)
Here, if equation (ii) is multiplied by 3, the coefficient of “x” will become the equal and can be eliminated.
So, multiply equation (ii) × 3 and then subtract equation (i)
3x + 2y - 9 - 3x-3y-18 = 0
y = -9/5
Now, put the value of y = 1.8 in equation (ii).
So, x – 1.8 = 6
x = 4.2
Substitution method: To solve a linear equation using this method, first, take the value of one variable separately from any of the equations. Then, substitute the value of this variable in the second equation and solve it.
Cross multiplication method: Linear equations can be easily solved using this method. In this technique is used to simplify the solution. Following formula is used for solving 2 variable equation:
x /(b₁ c₂ − b₂ c₁) = y / (c₁ a₂ − c₁ a₁) = 1 /(b₂ a₁− b₁a₂)
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if you are measuring the electrical potential difference from a rectangular 9v battery, which setting should you choose for the multimeter?
If you are measuring the electrical potential difference from a rectangular 9v battery, you would choose a DC setting.
The correct setting to measure the electrical potential difference from a rectangular 9v battery is the DC volts setting on a multimeter.
This is because the battery produces Direct Current (DC) voltage, which is measured in volts (V).
When using the multimeter, you should ensure that the negative and positive leads are connected to the correct terminals on the battery, and that the multimeter is set to the correct voltage range.
This will ensure accurate readings from the battery.
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It takes gretchen 275 seconds to travel 5 500 meters in her car. What is her rate of speed in kilometers per hour?.
Answer : Gretchen's rate of speed is 72.5 kilometers per hour.
What is the distance?
-- Distance is defined as the product of speed and time.
-- Since there are 3600 seconds in an hour, we can divide the time it takes -- Gretchen to travel 5500 meters by 3600 to find the number of hours it takes her:
⇒ 275 seconds / 3600 seconds/hour = 0.0763888889 hours.
Next, we need to convert the distance she travels to kilometers.
-- Since there are 1000 meters in a kilometer, we can divide the distance Gretchen travels by 1000 to find the number of kilometers she travels:
⇒ 5500 meters / 1000 meters/kilometer = 5.5 kilometers.
Now that we have the distance Gretchen travels and the time it takes her to travel that distance in the appropriate units, we can divide the distance by the time to find her rate of speed in kilometers per hour:
⇒ 5.5 kilometers / 0.0763888889 hours = 72.5 kilometers/hour.
Thus, Gretchen's rate of speed is 72.5 kilometers per hour.
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can you draw a gaussian surface that offers a simple way to compute the electric field surrounding a charged dipole?
Yes, it is possible to draw a Gaussian surface to compute the electric field around a charged dipole.
To do so, draw a closed surface that encloses the charges of the dipole and apply Gauss' Law. This will allow you to calculate the electric field at any point on the surface.
The Gaussian surface should be chosen so that it encloses both charges from the dipole, and should be large enough to ensure that the electric field is uniform across the surface. The electric field can then be calculated by using Gauss' Law, which states that the total electric flux through the surface must be equal to the charge enclosed by the surface divided by the permittivity of free space.
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What unit is torque calculated?.
Answer:
The SI unit for torque is the Newton-meter. In imperial units, the Foot-pound is often used.
Explanation:
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A stone is thrown horizontally from the top of a 31.2 m tall cliff. The stone lands at a distance
of 21.4 m from the edge of the cliff. What is the initial horizontal velocity of the stone?
The projectiles launch allows to find the answer for the initial velocity of the stone is: v = 8.49 m / s
What is meant by velocity?The directional speed of an item in motion, as measured by a specific unit of time and viewed from a certain point of reference, is what is referred to as velocity.The displacement that an object or particle experiences with respect to time is expressed vectorially as velocity. The metre per second (m/s) is the accepted unit of velocity magnitude (also known as speed).The vector quantity velocity (v), denoted by the equation v = s/t, quantifies displacement (or change in position, s), over change in time (t).Velocity is the pace and direction of an item's movement, whereas speed is the time rate at which an object is travelling along a route. In other words, velocity is a vector, whereas speed is a scalar number.Given data :
In this case the stone is thrown horizontally, therefore its initial vertical speed is zero, let's find the time it takes to reach the base of the cliff
y = y₀ + [tex]v_{oy}[/tex] t - ½ g t²
where y and y₀ are the current and initial position, is the initial vertical velocity, g the acceleration of gravity and t the time
When reaching the bottom its height is zero (y = 0) and the highest part its initial height is y₀ = 31.2 m
0 = y₀ + 0 - ½ g t²
t = [tex]\sqrt{\frac{2yo}{g} }[/tex]
Let's calculate
t = [tex]\sqrt{\frac{2*31.2}{9.8} }[/tex]
t = 2.52 s
They indicate that the stone fell at a horizontal distance of 21.4 m,
x = [tex]v_{ox}[/tex]t
= v_{ox} = x / t
v_{ox} = 21.4 / 2.52
= 8.49 m/s
In conclusion, using the projectiles launch we can find the answer for the initial velocity of the stone is:
v = 8.49 m/s
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How do you calculate torque required to rotate a shaft?.
Horsepower and RPMs, which are both dependent on measurement or some other method, are used to calculate torque for motors. Use this equation to calculate torque (in ft-lb) for motors: T = rpm/(HP*5252).
How do you figure out how much torque is required to turn a shaft?Result for an image How can you figure out how much torque is needed to spin a shaf,
To get load torque, divide the pressure (F) by the pulley's radius, which is the distance from the rotating axis (r). The needed torque for the operation is (20 N x 0.05 m = 1.0 Nm if the load's mass (green boxes) is 20 Newtons and the pulley's radius is 5 centimeters distant.
What does torque in rotation mean?The power that can turn an item about its axis is measured as torque. In linear kinematics, force is what makes an object move faster. Likewise, an angular acceleration is brought on by torque. The rotating counterpart of linear force is thus what torque is.
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What is the unit of momentum Mcq?.
kg ms-1 is the Si derived unit for momentum. The external force net is equal to the shift in momentum of a, according to Newton's second motion law in terms of momentum.
What is the momentum unit?Momentum is a vector number since it has both direction and magnitude. Newton seconds, abbreviated N s, or kg m s 1 are the units of momentum. To differentiate it from rotational momentum, this is frequently referred to it as linear momentum.
A Newton? The momentum unit in the SI?Therefor, the Newton-second can also be used as the SI unit by momentum in physics (Ns). In the CGS system, an object's mass is calculated in grams, and its velocity is calculated in centimeters per second. Consequently, the momentum unit.
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How can you calculate the mechanical advantage a simple machine provides?
•divide the output force by the output displacement
•divide the output displacement by the input displacement
•Simple machines do not provide a mechanical advantage.
•divide the output force by the input force
Answer: divide the output force by the input force
Explanation: your welcome
The mechanical advantage which a simple machine provides can be calculated by dividing the output displacement by the input displacement. Thus, the correct option is B.
What is Mechanical advantage?The mechanical advantage of a simple machine can be defined as the ratio of output force applied on the object to input force. Mechanical advantage is also the ratio of load overcame by a simple machine to the effort which is applied by that machine. The formula for mechanical advantage of a simple machine is given as:
M.A. = output force / input force
M.A. = Load / effort
Thus, the mechanical advantage of a simple machine depends both on the output force of the simple machine and the input force of the machine.
Therefore, the correct option is B.
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What is kinetic energy Mcq?.
The energy a thing has when it is moving is known as kinetic energy. Kinetic energy is calculated using the following formula: K.E. m = particle mass and v = velocity.
We can see from the following formula that kinetic energy depends on mass and velocity. The energy an object has as a result of motion is known as kinetic energy. A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force.
After the work is finished, energy is transferred to the item, which then moves at a new, constant speed. A particle or an item that is in motion has a sort of energy called kinetic energy. If energy is transferred via work.
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Correct Question:
What is kinetic energy ?.
Whole grains, like oats, barley, and wheat, are good sources of the b-complex vitamins. These foods are also considered very good sources of energy. Why would whole grains be good sources of energy?.
Whole grains, like oats, barley, and wheat, are good sources of the b-complex vitamins. These foods are also considered very good sources of energy, would whole grains be good sources of energy they are rich in complex carbohydrates which can be broken down for energy, and their B-complex vitamins are involved in metabolic processes that release this energy.
What is carbohydrates?A substance is a good source of energy if it is rich in complex carbohydrates.
Carbohydrate rich food substances that produce energy when broken down.They are the main stay for power in the body.Vitamin B-complex helps in carbohydrate metabolism.Deficiency of this vitamin hinders the rate at which metabolism of carbohydrate occurs.Therefore, the listed grains are good sources of energy.To know more about B-complex vitamins refer to:
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The complete question is as follows:
Whole gratis heats, barley, and wheat, are good sources of the B-complex vitamins. These foods are also considered very good sources of energy Why would whole grains be good sources of energy?
A They are rich in fats which are broken down and stored in the body through processes that require B-complex vitamins,
B They are rich in complex carbohydrates which provide energy, and their B-complex vitamins are important for transporting
these carbohydrates to cells that need energy
C They are rich in fats which can only be transported to energy producing cells with the help of B-complex vitamins
D They are rich in complex carbohydrates which can be broken down for energy, and their B-complex vitamins are involved in metabolic processes that release this energy
A car travels 258 miles in 312 minutes at a constant speed. How far did the car travel in 5 minutes?.
The car will travel around 4.13 miles in 5 minutes
Explain distance.
The term "distance" refers to the size or magnitude of the difference between two positions. The distance between two positions and the distance traveled between them are not the same thing, it should be noted. The distance traveled is the total length of a path that connects two points.
The speed will be: Given that the car travels at a constant speed, 258 miles are covered in 312 minutes,
Distance/Time x Speed
Speed = 258/312
Speed = 0.827
The distance, d, that the car travels in m minutes will therefore be represented by the following equation:
Distance equals 0.827 x 5.
= 4.135 miles away
= about 4.13 miles in 5 minutes
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How do you find the magnitude simple?.
The magnitude in simple way defined as "distance or quantity." In the sense of motion, it depicts the absolute or relative direction or size in which an object moves. It is used to describe the scope or size of something.
A quantity's magnitude is a number that indicates how large or small a measurement of that quantity is in comparison to a specified reference value (that reference value is most of the time taken to be zero). Magnitude is defined in physics as the maximum extent of size and direction of an object. Magnitude is simply a numerical value, whereas intensity conveys the concept of impact. In physics, it's generally refers to distance or quantity.
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Which of the following has the highest energy?
1) light with a long wavelength
2) light with an intermediate wavelength
3) light with a short wavelength
4) it is impossible to tell with the given information
The highest energy is the light with a short wavelength. Red has the least value since it has the shorter wavelengths of all visible light. Violet light has the shortest wavelength of all visible light, giving it the most energy. The longest wavelength and lowest energy are found in radio waves.
Two tiny conducting spheres are identical and carry charges of -20.0 °C and +50.0 °C. They are separated by a distance of 2.50 cm. (a) What is the magnitude of the force that each sphere experiences, and is the force attractive or repulsive? (b) The spheres are brought into contact and then separated to a distance of 2.50 cm. Determine the magnitude of the force that each sphere now experiences, and state whether the force is attractive or repulsive.
The magnitude of the force that each sphere before contact and after contact are 1.438 x 10^16 N and 3.23 x 10^ 15 N respectively.
What is the implementation of Coulomb's law for charges at two points?According to Coulomb's law, the force of attraction or repulsion between two charged substances is inversely proportional to the square of the distance between them and directly proportional to the product of their charges. It operates along the track that unites the two charges, that are conceived of as point charges.
Q1 => -20.0 C
Q2 => +50.0 C
Distance d => 2.5cm => 0.025m
a) F= k x Q1 Q2/d2
=> 8.99 x 10^9 N.m^2/C^2 x 20 x 50/(0.025)^2
=>1.438 x 10^16 N
The force is attractive since the charges have opposite signs.
b) The charge on each sphere after contact:
=> Q= Q1 + Q2/2 => -20 + 50/2 => +15 C
Magnitude of force => F = k x Q^2/d2
=> 8.99 x 10^9 x 15^2/(0.025)^2
=> 3.23 x 10^ 15 N.
What do point charges mean?a charge of electricity that is considered to originate at a single location and so has neither area nor volume.
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What is Newton's 3 law formula?.
The formula of Newton's third law is given by T = m g, where T is tension, m is mass, g is acceleration due to gravity. It is given by the statement, every action has equal and opposite reaction.
Every time one body exerts force on another, the receiving body experiences an opposing force that is both equal to and greater than the applied force.
If object A exerts a force on object B, then object B is required to exert an equal and opposite force on object A.
Some of the examples are bouncing a ball, firing a gun, sitting on a chair, movement of a rocket, etc.
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help!!!Which of the following are examples of resource depletion that can occur due to technology?
a.People use cell phones when driving, leading to more car collisions.
b.A new battery is developed, requiring the mining of non-renewable metals.
c.Landfills can release certain hazardous chemicals into the soil and water.
d.Certain chemicals are released into the air by cars, leading to acid rain.
Answer:
b.A new battery is developed, requiring the mining of non-renewable metals.
Option B. A new battery is developed, requiring the ,mining of non -renewable metals is the example of resource depletion due to technology.
when the consumption of non renewable and renewable resources for energy, electronic goods, industry good etc purposes. At a fast pace where these resources doesn't get enough time to replenished.
New battery is developed at faster pace and the raw material obtained for the production by mining of earths core. Natural resources are depleted as not enough time is given to earth to make new one.
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Is dimensional formula of work and torque same?.
Yes, the dimensional formula of work and torque is the same. It depends on the unit of work and torque.
The torque is described as the turning effect of force and is a vector quantity. It is based on the force's strength and the angle at which it is perpendicular to the line of action. The unit of torque is N.m.
Work is described as the force applied over a certain distance. Work is a mechanical manifestation of energy. The standard unit of work is the joule or N.m.
As the units of both the physical quantities are the same, the dimensional formula is also the same.
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T/F Type SE service-entrance cable shall be permitted where the insulated conductors are used for circuit wiring and the uninsulated conductor is used only for equipment grounding purposes.
SE service-entrance cable shall be permitted where the insulated conductors are used for circuit wiring and the uninsulated conductor is used only for equipment grounding purposes is true.
What is conductor?A conductor is a material or device that allows electricity to flow freely through it. It is typically a highly conductive material such as copper, aluminum or silver. Conductors are essential components of most electrical circuits and devices, and serve to connect different parts of an electrical system. As electricity flows through a conductor, it encounters resistance, which is the opposition to the flow of electricity through the material. The amount of resistance in a conductor depends on the material it is made of, its length, and its cross-sectional area.
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What is the kinetic energy of an object that has a mass of 10 kg and velocity of 1 m?.
The kinetic energy for the object which has a mass m of 10 kg with velocity of 1 m is 5 m/s.
The kinetic energy of an object increases with its mass. v indicates the object's speed. This relationship shows that an object's kinetic energy is inversely proportional to the product of its mass and velocity.
Possible justification: Because kinetic energy and speed have a strong relationship, an object's kinetic energy rises as its speed does. Kinetic energy's nonlinear (square) proportional relationship with speed (KE v2) 1. When an object's speed doubles, its kinetic energy increases by a factor of four. 2.
The kinetic energy decreases by a factor of four as the object's speed is cut in half.
K.E = 1/2 * m * v^2
K.E = 1/2 * 10 * 1^2
K.E = 1/2 * 10
K.E = 5
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What is formula for momentum Mcq?.
Mass times velocity equals momentum. Consequently, if two items have the same velocity, a lighter one will move at a faster rate
p = mv
p =momentum, m =mass, v =velocity
In the actual world, what is momentum?Almost every action that involves motion has momentum. It is an important tenet of physics. In athletics, the term "momentum" is frequently used. For instance, if a team is moving forward and trying to stop, it will be difficult.
How do you define momentum?singular nouns Momenta, plural for momentums. force or rate of motion; impulse, as of a tangible thing or sequence of events: Going downward, the automobile picked up speed.
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The star Betelgeuse is about 600 light-years away. If it explodes tonight, approximately when can it be observed?
The star Betelgeuse is about 600 light-years away. If it explodes tonight, approximately: we won't know about it until 600 years from now.
What is light-years?Rather than measuring time, a light-year measures distance (as the name might imply). The distance a light beam travels in a single Earth year is measured in "light-years," which is roughly equivalent to 6 trillion miles (9.7 trillion kilometers).
Because the cosmos is expanding, the light that goes the farthest is stretched the most, resulting in the object that emitted that light being farther away. The expanding cosmos is the reason we can see things up to 46.1 billion light-years away. According to a common model of the Universe, some of the most recently discovered objects may be more than 13 billion light years away.
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Is mass a vector or scalar?.
Mass is a scalar quantity, which means it is a physical quantity that has only magnitude and no direction.
Unlike vector quantities, such as velocity or acceleration, scalar quantities do not have a direction associated with them. Mass is a measure of the amount of matter in an object and it is always a positive value, regardless of the direction of the object.
The unit of mass is the kilogram(kg) or pound(lb) etc. It is an important physical quantity in physics and is used to calculate the weight of an object under the influence of gravity and also used to calculate the force required to move an object. It's a scalar quantity because it doesn't have any direction.
It's just a number that represents how much matter is present in an object, as opposed to vector quantities like velocity or acceleration which have both magnitude and direction.
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determine the magnitude and coordinate direction angles of the resultant force
It's important to have a clear understanding of vector sum and trigonometry concepts to be able to determine the magnitude and coordinate direction angles of the resultant force.
The vector sum can be found by adding the vectors head-to-tail, which means that the tail of one vector is placed at the head of the next vector. The vector sum is known as the Resultant force.
To find the magnitude of the resultant force, we use the Pythagorean theorem, which states that the magnitude of the vector is equal to the square root of the sum of the squares of the vector's components. In other words,
|R| = √(Fx^2 + Fy^2 + Fz^2)
To find the direction angles of the resultant force, we use the trigonometric functions. The coordinate direction angles are the angles between the positive x, y, and z-axes and the projection of vector onto the xy, yz, and xz planes.
The angle with the x-axis is arctan(Fy/Fx)
The angle with the y-axis is arctan(Fz/Fx)
The angle with the z-axis is arctan(Fz/Fy)
It's worth noting that these angles are measured in a counterclockwise direction and that these angles are not unique, you can add or subtract multiples of 360° to get the same vector.
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What is the best way to solve equation?.
To solve systems of equations, three approaches are used: graphing, substitution, as well as elimination.
To solve systems of equations, three approaches are used: graphing, substitution, as well as elimination. Manually graph the provided equations and discover the point(s) that they all cross to solve a system. The coordinate of just this point will provide you with the values for exact variables you are attempting to solve for.
There are four methods for resolving one-step equations: adding, subtracting, multiplying, and dividing. Both sides of either equation will remain equal if simply add the same integer to both sides. Both sides of either equation would remain equal when we deduct the same integer from both sides.
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