The rocket is still moving at 30 Km/s after 60 seconds
What is speed?Speed is the distance travelled per unit. Mathematically, it can be expressed as:
Speed = distance / time
How to determine the speed after 60 secondsThe follwing data were obtained from the question:
Initial speed = 30 Km/sForce = 0 NSpeed after 60 seconds =?From the data given, we were told that the rocket experience no forces.
This simply implies that the rocket was still moving at the said speed (i.e 30 Km/s)
Thus, we can conclude that the speed of the rocket after 60 seconds is 30 Km/s since it experience no forces.
Learn more about speed:
https://brainly.com/question/680492
#SPJ1
An ocean vessel using sonar sends a sound wave to the bottom of the sea and receives an echo after 0.3 sec. assume a speed of sound in water to be 1480 m/s. calculate the depth of the sea.
By using sonar echo, the depth of the sea is 222 m.
We need to know about the sonar echo to solve this problem. Sonar detection sends the sound wave through a medium to detect an object. The sound wave needs to travel from the transmitter to the object and then come back to the receiver. It can be determined by
v = 2.s / t
where v is the speed of sound, s is the distance and t is the time interval sound wave released until received.
From the question above, we know that
t = 0.3 s
v = 1480 m/s
By substituting the given parameters, we get
v = 2.s / t
1480 = 2 . s / 0.3
s = 740 . 0.3
s = 222 m
Find more on sonar echo at: https://brainly.com/question/14090821
#SPJ4
A 6 feet diameter bar experiences a torque of 200 ft-lb. what is the maximum shear stress in the bar?
By using the torque, the shear stress is 2.36 lb/ft².
We need to know about torque to solve this problem. Torque is the rotational equivalent of linear force. It can be determined as
τ = F x r
where τ is torque, F is perpendicular force and r is radius.
Shear stress can be calculated by torque
P = F / A
P = τ / (π.r³)
where P is shear stress, r is the radius.
From the question above, the parameter given are
τ = 200 ft.lb
d = 6 ft
Find the radius
r = 1/2 . d
r = 3 ft
Find the shear stress
P = τ / (π.r³)
P = 200 / (π.3³)
P = 2.36 lb/ft²
Find more on torque at: https://brainly.com/question/14839816
#SPJ4
1.Write the definition of each term in the definition column. Then decide whether that force produces motion and write either yes, no or it depends in the motion column. 2.For each diagram, determine the net force acting on the object. Follow the format for showing your work shown in (a). Then, write whether or not there will be a change in motion. If yes, write the direction the object will move in.
Answer:
UN balanced force to applied on that object
Which type of characteristics are demonstrated by the unique pattern of bullets fired from every gun model?
Individual characteristics are demonstrated by the unique pattern of bullets fired from every gun model
There are two types of characteristics. They are class characteristics and individual characteristics. Class characteristics helps to place an evidence into a group of objects whereas individual characteristics narrows down the evidence to a particular object.
For example, a type of blood group is a class characteristic because it belongs to a group of humans. But DNA taken from the blood is a individual characteristic because it belongs to only one human on the entire planet.
Therefore, Individual characteristics are demonstrated by the unique pattern of bullets fired from every gun model
To know more about Individual characteristics
https://brainly.com/question/11610795
#SPJ1
A plane traveling north at 200 m/s turns and then travels south at 200 m/s. the change in its velocity is:_________
A plane traveling north at 200 m/s turns and then travels south at 200 m/s. the change in its velocity is 400 m/s in the south direction.
What is velocity?A particle or object's movement with respect to time is expressed vectorially as velocity.
The meter per second (m/s), usually referred to as speed, is the accepted unit of velocity magnitude.
As an alternative, the velocity magnitude can be expressed in centimeters per second (cm/s).
The rate of something moving in a specific direction is called its velocity. Using an automobile driving north on a highway as an example, or a rocket after it has launched, as an example of speed.
Scalar implies that the velocity vector's absolute value magnitude will always equal the motion's speed.
ΔV = V1 - V2
ΔV = 200 - (-200)
ΔV = 200+200 = 400 m/s
To learn more about velocity, refer
https://brainly.com/question/19108024
#SPJ4
A solution is prepared by dissolving 1.928 g of kno3 into enough water to make 651 ml. what is the molarity of the solution?
The molarity of the solution is 0.0293 m. 1.928 g of kno3 are dissolved in 651 ml of water.
The amount of a substance in a solution stated as an amount of substance per unit volume of solution is known as molar concentration, also known as molarity, quantity concentration, or substance concentration. The most common unit used in chemistry to express molarity is the number of moles per liter, represented by the unit sign mol/L or mol/dm3 in SI units. One molar, or 1 M, of a solution is defined as one mol/L.
The use of molar concentration in thermodynamics is typically not applicable because the volumes of most solutions very minimally change with temperature due to thermal expansion.
Learn more about molarity here-
https://brainly.com/question/8732513
#SPJ4
How would you have to change the applied voltage in a circuit if you want to increase the power by a factor of 4 while keeping the resistance constant?
The increase by a factor of 2 is sufficient to change the applied voltage in a circuit if we want to increase the power by a factor of 4 by keeping the resistance constant.
Simple formula is:
Voltage (V) = Current (I) X Resistance (R)
Thu if R is constant and V is increased I will reduce
Thus assuming a constant Resistance , increasing the Voltage will reduce the current in the circuit.
Applied voltage :
Voltage applied to a circuit is equal to the sum of the individual voltage drops. The drop across a resistor in a series circuit is directly proportional to the size of the resistor. If the circuit is broken at any point, no current will flow.
What happens when voltage is applied to a resistor?
Therefore, if the voltage is increased, the present will increase provided the resistance of the circuit does not change. Similarly, increasing the resistance of the circuit will lower the present flow if the voltage is not changed
Why is voltage applied?
When a voltage is applied, it's energetically preferable for an electric charge to move towards the point of lowest voltage in the wire; that's a fancy way of saying that a positive electric charge gains energy when going from a point of high voltage to a point of low voltage.
Learn more about flow of current in a circuit :
brainly.com/question/18108586
#SPJ4
What is the symbol, atomic number, # of protons, # of electrons, atomic mass, rounded atomic mass, # of neutrons (show work), and period of: hydrogen
roseeldavis
2 hours ago
Physics
High School
answered
Please help me with this question soon.
Block A - 19.3 Kg/L
Block B - 0.64 Kg/L
Block C - 0.70 Kg/L
Block D - 0.917 Kg/L
Block E - 3.53 Kg/L
1) Which block has the greatest density?
Block A
Block B
Block C
Block D
Block E
2) Which block has the lowest density?
Block A
Block B
Block C
Block D
Block E
3) Submit your data table and identify the substance each block is made of.
Answer: Block A - 19.3
Block B - 0.64
Block C - 0.70
Block D - 0.917
Block E - 3.53
Explanation: i hope this helps you a little
What is the average velocity
of a ball that takes 15.7
seconds to roll 18 meters? HELP PLEASEEE
The average velocity of the ball is 1.14 m/s.
Since there is no height given, we can assume that the ball was rolling on a non-inclined surface.
Distance covered by the ball = 18 meters
Time taken by the ball = 15.7 seconds
The velocity of the ball = Distance / Time taken
Velocity= 18/15.7
Velocity= 1.14 m/s
and since there is no initial velocity given, it is the average velocity of the ball.
The distance traveled divided by the time passed is the definition of an object's average speed. Average velocity can be calculated as the displacement divided by the time. Velocity is a vector quantity. The straight line average velocity formulae are invalid for broad scenarios involving non-constant acceleration, hence this definition must be used directly.
To learn more about average velocity please visit-
https://brainly.com/question/862972
#SPJ9
Write a general rule that explains how to predict how the gravitational forces between objects of different mass will change when the masses increase or decrease
As an object's mass increases, the gravitational force grows (also called the gravity force). The gravitational force rapidly decreases as the distance between masses increases.
How does gravitational force change as mass increases?Greater gravitational forces will be used to attract heavier objects because the gravitational force is directly proportional to the mass of both interacting objects. Therefore, the gravitational attraction between two objects grows as their respective masses do as well.
How does mass affect the gravitational force between objects?The masses of the two objects and their separation from one another will determine how much gravitational force there is between them. Each object's mass and gravitational force are inversely proportional. This implies that an object's gravitational force increases with mass.
To know more about gravitational forces :
https://brainly.com/question/12528243
#SPJ9
If the electric flux through a closed surface is zero, the electric field at points on that surface must be zero. True or false?.
True. If E=0, at all points of a closed surface that means there is no electric field present. Therefore, electric flux should also be zero.
What happens when electric flux is zero?
This leads us to the Gauss's Law, which says that the electrical flux going through a closed surface, is that the sum of all charges Q inside that closed surface, divided by permittivity of free space E₀. If that flux is zero, meaning there is no net charge inside the shape.
What is a electric flux in closed surface?The net flux through a closed surface is a quantitative measure of the net charge inside a closed surface. 2. the web electric flux through any closed surface surrounding a net charge 'q' is independent of the shape of the surface.
For which surface electric flux will be zero?The flux of an electrical field through a closed surface will be always zero if and only if there is no net charge in the volume enclosed by the surface. the quantity of electric flux is always proportional to the charges inside the surface
Learn more about electric flux :
brainly.com/question/26289097
#SPJ4
What is the difference between rotation and revolution in relation to the Earth. How long does each take on Earth?
Answer:
rotation is a day and revolution is 365 days
how much is the mass of a ball that is rolling down down a ramp at 4.6m/s, with a momentum of 3.22 kg-m/s?
Answer:
[tex]0.70\; {\rm kg}[/tex].
Explanation:
If an object of mass [tex]m[/tex] is travelling at a velocity of [tex]v[/tex], the momentum [tex]p[/tex] of that object would be [tex]p = m\, v[/tex].
In this question, both momentum [tex]p[/tex] and velocity [tex]v[/tex] are given, and mass [tex]m[/tex] needs to be found. Hence, rearrange the equation [tex]p = m\, v[/tex] and solve for [tex]m\![/tex]:
[tex]\begin{aligned} m &= \frac{p}{v} \\ &= \frac{3.22\; {\rm kg \cdot m \cdot s^{-1}}}{4.6\; {\rm m\cdot s^{-1}}} \\ &= 0.70\; {\rm kg}\end{aligned}[/tex].
Therefore, the mass of this ball would be [tex]0.70\; {\rm kg}[/tex].
A photon of wavelength 200. nm strikes a metal and ejects an electron with a velocity of 3.4 x 105 m/s. what is the threshold frequency of the metal?
According to photoelectric effect, the threshold frequency of metal is 1.42 x 10¹⁵ Hz.
We need to know about the photoelectric effect to solve this problem. The photoelectric effect is electron ejected from metal because of light source. The kinetic energy of the ejected electron is
K = h(f - fo)
where K is kinetic energy, h is Max Planck constant (6.6 x 10¯³⁴ Js), f is the frequency of light source and fo is the threshold frequency of the metal.
From the question above, we know that
λ = 200 nm = 200 x 10¯⁹ m
v = 3.4 x 10⁵ m/s
me = 9.1 × 10¯³¹ kg
Find the frequency of light source
f = c / λ
f = 3 x 10⁸ / (200 x 10¯⁹)
f = 1.5 x 10¹⁵ Hz
Find the threshold frequency
K = h(f - fo)
1/2 . me .v² = 6.6 x 10¯³⁴ (1.5 x 10¹⁵ - fo)
1/2 . 9.1 × 10¯³¹ . (3.4 x 10⁵)² = 9.9 x 10¯¹⁹ - 6.6 x 10¯³⁴fo
9.9 x 10¯¹⁹ - 6.6 x 10¯³⁴fo = 5.26 x 10¯²⁰
6.6 x 10¯³⁴fo = 9.37 x 10¯¹⁹
fo = 1.42 x 10¹⁵ Hz
Find more on photoelectric effect at: https://brainly.com/question/1408276
#SPJ4
In order to store fourfold as much energy, how much charge should it have on its plates?
2Q charge should it have on its plates.
What is the electric field of a plate?The electric field between plates is the area or space where the plates' charge influences can be seen.
For example, if a charged particle is placed near any charged plate, the plate exerts an electric force to attract or repel the charged particle.
Either positive or negative charges are present in charged particles.
Since electrons are always negatively charged, a negatively charged particle carries more electrons (negative charges) than protons (positive charges).
Therefore, there must be fewer electrons than protons in order for charged particles to be positive.
A plate becomes positively or negatively charged when charged particles are placed on it, and a charged plate generates an electric field all around it.
Gauss's law is shaped by the surface.
Calculating the area of shapes with a defined geometry is simple.
The Gauss's law equation can be written as the surface charge density divided by the medium's electric permittivity in the case of a sphere or rectangular plate.
To learn more about electric charge, refer
to https://brainly.com/question/26117248
#SPJ4
True or false: the period of a pendulum clock decreases if you increase the length of the pendulum.
It is false. The period of a pendulum clock increases if you increase the length of the pendulum.
The time period of a pendulum clock is directly proportional to the square root of the length.
The formula of the time period of a simple pendulum is:
T = 2π√(l/g)
According to the formula, time period T is directly proportional to the square root of length and inversely proportional to gravity. The time period will increase if we increase the length of the pendulum clock.
For example, the time period will increase by two times if we increase the length of the pendulum by four times.
If you need to learn more about simple pendulum, click here
https://brainly.com/question/2292218?referrer=searchResults
#SPJ4
False, the period of a pendulum clock does not decreases if you increase the length of the pendulum. Their variation is directly proportional.
The square root of the length of a simple pendulum determines its period in a direct proportion. In other words, as length grows, so does the amount of time.
The relationship between two values where their ratio equals a constant number is known as a direct proportion or direct variation. In our case, the two values are.
1. Square root of the length of the pendulum
2. Period of a pendulum
follow the link below to understand more about a pendulum
https://brainly.in/question/44843741
#SPJ4
Which of the forces applied to the block perform nonconservative work on the system?
The friction force applied to the block performs nonconservative work
on the system.
What is Friction force?The force preventing sliding against one another of solid surfaces, fluid layers, and material components is known as friction. There are various kinds of friction: Two solid surfaces in contact are opposed to one another's a relative lateral motion by dry friction.Friction between two surfaces causes kinetic energy from moving surfaces to be converted into thermal energy (that is, it converts work to heat). As demonstrated by the use of friction produced by rubbing pieces of wood together to start a fire, this property can have dramatic effects. Every time there is motion with friction, such as when a viscous fluid is stirred, kinetic energy is transformed into thermal energy. Wear is a significant side effect of many types of friction that can result in deteriorated performance or component damage. The discipline of tribology includes friction.The formula of the friction force F = μN
where,
F = friction force
μ = coefficient of friction
N = normal force
To learn more about friction force, refer
to https://brainly.com/question/26117248
#SPJ4
Determine the minimum initial velocity v0 and the corresponding angle u0 at which the ball must be kicked in order for it to just cross over the 3-m high fence.
The minimum initial velocity u = 58.3°
(v0) min = 9.76 m/s
Explanation:
Coordinate System: The coordinate system will be set so that its origin coincides with the ball’s initial position.
x-Motion: Here (v0) = v0 cos u x0 and x = 6 m Thus,
(+) x = [tex]x_{0}[/tex] + (v0)xt
6 = 0 + (v0 cos u)t
t = 6/v0 cos u (1)
y-Motion: Here (v0)x = v0 sin u, ay = -g = -9.81m/s and y0 = 0
( A + c B) y = y0 + (v0)y t +1/2 [tex]a_{y}[/tex][tex]t^{2}[/tex]
3 = 0 + v0 (sin u)t + 1/2 (-9.81) [tex]t^{2}[/tex]
3 = v0 (sin u)t - 4.905[tex]t^{2}[/tex] (2)
Substituting Eq. (1) into Eq.(2) yields
v0 = [tex]\sqrt[2]{\frac{58.86}{sin 2u - cos2 u} }[/tex] (3)
From Eq. (3), we notice that is minimum when is
maximum. This requires [tex]\frac{df(u)}{du}[/tex]
[tex]\frac{df(u)}{du}[/tex] = 2 cos2u + sin2u = 0
tan2u = -2
2u = 116.57°
u = 58.28° = 58.3°
Substituting the result into Eq.(2), we have
(v0)min = [tex]\sqrt[2]{\frac{58.86}{sin 116.57° - cos2 58.28°} }[/tex]
(v0)min = 9.76 m/s
To learn more about minimum velocity, refer
to https://brainly.com/question/26117248
#SPJ4
The decay rate of a radioactive sample decreases from 175 kbq to 12.4 kbq in 18.3 s.What is the decay constant of this sample?
By the half-life of radioactive, the decay constant is 0.144 /s.
We need to know about the half-life of the radioactive elements to solve this problem. The radioactive element will decay over time and follow the equation
N = No(1/2)^(t/t'')
λ = ln2 / t''
where N is the final quantity, No is the initial quantity, λ is the decaying constant, t is time and t'' is the half-life of a radioactive element.
From the question above, we know that
t = 18.3 s
No = 175 kbq
N = 12.4 kbq
Calculate the half-life
N = No(1/2)^(t/t'')
12.4 = 175(1/2)^(18.3/t'')
(1/2)^(18.3/t'') = 62/875
18.3/t'' = ⁰'⁵log(62/875)
18.3/t'' = 3.82
t'' = 4.79 seconds
Determine the decay constant
λ = ln2 / t''
λ = ln2 / 4.79
λ = 0.144 /s
Find more on half-life at: https://brainly.com/question/25750315
#SPJ4
Anyone in AP physics, I'm a freshman and need a bit of help understanding this problem
Quiet inspiration will ________ thoracic and lung volume and ________ intrapulmonary pressure.
Quiet inspiration will increase thoracic and lung volume and decrease intrapulmonary pressure.
Boyle's Law is the law that determines the relationship of the pressure of a gas with respect to the volume of the container. Here the pressure of gas exists as inversely proportional to the volume of the particular container.
This is one of the major principles which is important for understanding various processes of events occurring during pulmonary ventilation. If there is an increase in the volume of a container takes place, the pressure will gradually decrease.
Quiet inspiration will result in increasing thoracic as well as lung volume and is likely to decrease intrapulmonary pressure. Since the inspiratory muscles get contract to increase the thoracic cavity volume as this will cause an increased volume of the lungs as well. Then gradually there will be an increase in the volume of the lungs that lowers the intrapulmonary pressure which exists below atmospheric pressure.
Learn to know more about the inspiration and expiration of Quiet breathing at
https://brainly.com/question/14038944
#SPJ4
A particular load is rated to use 2.2 kw at 240 volts. this load is connected to a 2-pole breaker in a panel using 12 awg conductors. how much current will this load draw?
The current drawn by the load is 9.17 A.
What is current?Current can be defined as the rate of flow of electric charge round a circuit.
To calculate the current drawn by the load, we use the formula below.
Formula:
I = P/V............................Equation 1Where:
I = Current drawn by the loadP = Power of the loadV = VoltageFrom the question,
Given:
P = 2.2 kW = 2200 WV = 240 VSusbtitute these values into equation 1
I = 2200/240I = 9.17 AHence, the current drawn by the load is 9.17 A.
Learn more about current here: https://brainly.com/question/24858512
#SPJ1
What happens to the ratio of output to input amplitude as the frequency increases?
The peak (+ve half) and trough (-ve half) portions of the waveform signal flatten out or are "Clipped-off" when the input amplitude is too high, forcing the output waveform signal to exceed the power supply voltage rails.
Over the whole auditory range of frequencies from 20 Hz to 20 kHz, the majority of contemporary audio amplifiers exhibit the same flat frequency response as seen above. The Bandwidth (BW) of an audio amplifier, which is mostly influenced by the circuit's frequency response, is the range of frequencies it can handle. The power in the high frequency band, from 8 to 24 Hz, divided by the power in the low frequency band, from 3 to 5 Hz, is known as the frequency ratio.
Learn more about Frequency here-
https://brainly.com/question/5102661
#SPJ4
L
What are the disadvantages of driverless cars? Check all that apply.
They always drive slower than surrounding traffic to avoid accidents.
They cannot tell the difference between people and other objects.
They will wait for crossing pedestrians even if signaled to keep driving.
They may unexpectedly drive off the road to avoid potential hazards.
They will not allow the human driver to take control while in motion.
The average diameter of an atom is 2 x 10-8 m. what if the average diameter of an atom was 1 cm? how tall would you be? (10)
The tall would be 2 x [tex]10^{-6}[/tex] m
Explanation:
Given
Use D1 and D2 to represent the old and new diameters.
D1 = 2 x [tex]10^{-8}[/tex]
D2 = 1cm
To determine how tall you'd be, we need to divide D2 by D1:
Ratio = [tex]\frac{D2}{D1}[/tex]
Substitute values for D2 and D1
Ratio = [tex]\frac{2*10^{-8} }{1cm}[/tex]
Convert cm to m
Ratio = [tex]\frac{2*10^{-8} }{0.01}[/tex]
Convert denominator to exponents
Ratio = [tex]\frac{2*10^{-8} }{10^{-2} }[/tex]
Apply the Law of indices
Ratio = [tex]2*10^{-8} *10^{2}[/tex]
Ratio = [tex]2*10^{-8+2}[/tex]
Ratio = [tex]2*10^{-6}[/tex]
Therefore [tex]2*10^{-6}[/tex]m time falls.
To learn more about average diameter tall, refer
to https://brainly.com/question/25573309
#SPJ4
A depiction of a famous scientific experiment is given. Consider how the beam changes when the magnet is off compared to when the magnet is on.
The beam used is a negatively charged electron beam with a velocity of
v = E / B where E is the electric field and B is a magnetic field.
Now indicates that the electric field and the magnetic field are contracted and that the beam passes without deviating, so the electric and magnetic forces must be balanced
Fe = Fm
q * E = q * v * B
v = E / B
this configuration is called speed selector.
The beam used is a negatively charged electron beam with a velocity of v = E / B.
For more information on magnets click on the link below:
https://brainly.com/question/14997726
#SPJ4
Although part of the question is missing the complete question is A depiction of a famous scientific experiment is given. Consider how the beam changes when the magnet is off compared to when the magnet is on. A bell-shaped evacuated glass tube with a narrow end and a wide end is connected to a battery at the narrow end. In the center of the tube there is a negatively charged plate above the tube, a positively charged plate below the tube, and a magnet with the field turned off. A beam originating at the narrow end of the tube travels toward the wide end of the tube. With the magnetic field turned off, the beam path bends toward the positively charged plate and ends at the lower half of the wide end of the tube. A bell-shaped evacuated glass tube with a narrow end and a wide end is connected to a battery at the narrow end. In the center of the tube there is a negatively charged plate above the tube, a positively charged plate below the tube, and a magnet with the field turned n. A beam originating at the narrow end of the tube travels toward the wide end of the tube. With the magnetic field turned on, the beam path travels in a straight path to the center of the wide end of the tube. What type of beam was used in this experiment?
what is the BEST example of an external communication?
Social media is the example of an external communication.
What are the external communication?The procedures in charge of communicating with individuals and groups outside of your organization are known as external communications. Customers, companies, suppliers, partners, investors, government organizations, and law enforcement are a few of these.
Email, brochures, newsletters, posters, advertisements, and other types of multi-media marketing are common examples of external communication that are used to entice clients, partners, and suppliers to engage in profitable business dealings.
What are goals of external communication?External communications' main objective is to convey to the public an important message about the organization's efforts and level of excellence. An aspect of communication that organizations cannot directly control is informal external communication.
To know more about Social media :
https://brainly.com/question/24687421
#SPJ1
According to faraday's law, if the rate of flux change quadruples, what happens to the induced voltage?
a. it increases by a factor of eight.
b. it quadruples.
c. it doubles.
d. it halves.
Answer:
E = - dΦ / dt
(b) would be the correct answer
Fez loves team sports and gets abundant exercise through team activities. When Fez engages in team activities such as running or passing the ball, what is happening to Fez’s muscles?
A.
They are not stretching, bending, shortening, or lengthening.
B.
They are maintaining tension with an equal force on all sides.
C.
They are lengthening to resist a greater force.
D.
They are producing enough force to lift large weights.
Answer:
They are maintaining tension with an equal force on all sides.
Fez engages in team activities such as running or passing the ball, then muscles maintain tension with an equal force on all sides. Hence, option B is correct.
What is exercise?Exercise is the training of the body to increase fitness and function.
Although the phrases physical activity and exercise are sometimes used synonymously, this article will make a distinction between the two. Physical activity is a broad phrase that refers to any energy expenditure caused by skeletal muscle action. As a result, it encompasses the full range of activity, from deficient resting levels to maximal exertion. Physical activity includes exercise.
Exercise stands apart because it is a systematic activity designed with physical fitness development and maintenance in mind. Physical fitness growth through the body's and its various systems' adaptation to a workout regimen is referred to as physical conditioning.
To know more about Exercise :
https://brainly.com/question/13128077
#SPJ2
