When the velocity of an object is quadrupled , by what factor is its kinetic energy changed ?
Answer:
I believe it is 16
Explanation:
Answer:so add the momentum twice and then the kinetic energy becomes four times
Explanation:This includes to me not the factor but by what factor it’s kenetic energy changes Momentum becomes twice and kinetic energy becomes four times its original value
what happens if you shoot a bullet in the air and lands on your head
Answer:
most of the time the bullet will not hurt you but sometimes can hurt or kill you.
You are driving at 30.0 m/s on a freeway curve of radius 25.0 m. What is the magnitude of your acceleration?
Answer:
36.0 m/s^2
Explanation:
The magnitude of your acceleration is equal to 36.0 [tex]m/s^2[/tex].
Given the following data:
Radius, r = 25.0 meters. Speed, V = 30.0 m/s.To calculate the magnitude of your acceleration:
Mathematically, the centripetal acceleration of an object is given by this formula:
[tex]A_c = \frac{V^2}{r}[/tex]
Where:
[tex]A_c[/tex] is the centripetal acceleration.r is the radius of the circular track.V is the velocity of an object.Substituting the given parameters into the formula, we have;
[tex]A_c = \frac{30.0^2}{25.0}\\\\A_c = \frac{900}{25.0}[/tex]
Centripetal acceleration = 36.0 [tex]m/s^2[/tex]
Read more on centripetal acceleration here: https://brainly.com/question/2788500
Twins Jody and Taylor are rearranging the furniture in their bedroom and want to move a dresser across the room. The dresser has a sliding force of 90N. Jody can push with a force of 55N and Taylor can push with a force of 38N. What is the Net Force? Can the twins move the dresser across the room? Explain why in complete sentences and show all math work to support your answer.
Plz help this is due in 5 days ;-;
Answer:
yes, They will be able to move the dresser.
Explanation:
sliding force 90N
55N + 38N = 93N
therefore, yes the twins can move the dresser
How do you write the formula of metal elements
A ball is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of
10m s -2 , with what velocity will it strike the ground? After what time will it strike the Ground?
Answer:
The ball strikes the ground at 20 m/s after 2 seconds
Explanation:
Free Fall Motion
Any object that is being acted upon only by the force of gravity is said to be in a state of free fall.
If an object is dropped from rest in a free-falling motion, it falls with a constant acceleration called the acceleration of gravity, which value is assumed as [tex]g = 10 m/s^2[/tex].
The final velocity of a free-falling object after a time t is given by:
vf=g.t
The distance traveled by a dropped object is:
[tex]\displaystyle y=\frac{gt^2}{2}[/tex]
If we know the height h from which the object was dropped, we can find the time it takes fo hit the ground:
[tex]\displaystyle t=\sqrt{\frac{2h}{g}}[/tex]
The ball is dropped from a height of h=20 m. The time taken to strike the ground is:
[tex]\displaystyle t=\sqrt{\frac{2*20}{10}}[/tex]
t = 2 s
The velocity at which the ball strikes the ground is:
vf = 10 * 2
vf = 20 m/s
The ball strikes the ground at 20 m/s after 2 seconds
A student wants to use all of the appliances at the same time so plugs them in to a multiway socket.
The socket has a maximum safe current of 30A and the mains electricity is 230V.
a. Is it safe to use all five appliances at once?
Explain your answer showing your use of the equation
Answer:
The answer would be no
Explanation:
because the voltages are so high, we can assume that 5 appliances divided up between the voltages would not be safe to use together and would ultimately cause the circuits to overload
the distance between pole and position of image can denoted by___
a)u. b)v. c)R. d)C
Answer:
b) v
Explanation:
the distance between pole and position of image can denoted by v
What else is produced during the replacement reaction of magnesium and hydrochloric acid? Mg + 2HCl H2 + ________ MgCl2 Mg2Cl2 Mg2Cl MgCl
Answer:
A
Explanation:
MgCl2
Answer:
its MgCl2
Explanation:
i got it on edge
Suppose the driver of a vehicle applies the brakes while traveling at 8.25 m/s and the car stops after
traveling 24.0 m. What was the car's acceleration?
Answer:
15.96
Explanation:
i am the smartest rock in the box so. . . ya
The acceleration of the car if the brakes while traveling at 8.25 m/s and the car stops after traveling 24.0 m is -1.418 m / s².
What is acceleration?The term "acceleration" refers to the rate and direction at which velocity varies over time. Acceleration is the change in direction or speed of an object or points moving ahead. The frequent change in direction causes motion on a circle to rise even when the speed remains constant.
For all other motions, these effects increase acceleration. Since acceleration has both a magnitude and a direction, it is a vector quantity. Velocity is a vector quantity as well.
Given:
The distance traveled by car, d = 24 m,
The initial velocity of the car, v = 8.25 m/s,
Calculate the acceleration using the motion equation as shown below,
[tex]v^2- u^2 = 2ad[/tex]
0 - 8.25² = 2a × 24
48a = -68.06
a = -68.06 / 48
a = -1.418 m / s²
To know more about Acceleration:
https://brainly.com/question/3046924
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A constant force of 4.5N acts on a 7.2 kg object for 10 s what is the change in the object velocity
Answer:
The change in the object's velocity is 6.25 m/s
Explanation:
Force
According to the second Newton's law, the net force exerted by an external agent on an object of mass m is:
F = ma [1]
Where a is the acceleration of the object.
On the other hand, the equations of the Kinematics describe the motion of the object by the equation:
[tex]v_f=v_o+at\qquad\qquad[2][/tex]
Where:
vf is the final speed
vo is the initial speed
a is the acceleration
t is the time
It's given a constant force of F=4.5 N acts on an object of mass m=7.2 kg. The object has an acceleration we can calculate solving [1] for a:
[tex]a=\frac{F}{m}[/tex]
[tex]a=\frac{4.5}{7.2}=0.625[/tex]
[tex]a=0.625\ m/s^2[/tex]
It's required con compute the change of velocity (or its magnitude, the speed). From [2]:
[tex]v_f-v_o=at[/tex]
The expression at the left side is the change of speed Δv:
[tex]\Delta v=at[/tex]
Knowing the time is t=10 s:
[tex]\Delta v=0.625*10[/tex]
[tex]\Delta v=6.25\ m/s[/tex]
The change in the object's velocity is 6.25 m/s
the height has a distance of 2.5 seconds to hit the ground what is gravity?
Answer:
11 times
Explanatiom:
756 fourty
What two things determine whether a molecule is polar?
Check all that apply.
A. If there is an anion and a cation
B. If the molecule is easily ionized
C. If the bonds are polar
D. The molecular shape
Answer:
c
Explanation:
Answer:C&D
Explanation:
I just did it
How high will the ball go? I would really appreciate a step by step answer!
Answer:
y = 3.26 [m]
Explanation:
In order to solve this problem, we must use the following equation of kinematics.
[tex]v_{f}^{2}= v_{o}^{2}-2*g*y[/tex]
where:
Vf = final velocity = 0
Vo = initial velocity = 8 [m/s]
g = gravity acceleration = 9.81 [m/s²]
y = elevation [m]
Note: The negative sign in the equation above represents that the movement is againts the direction of the gravity acceleration.
Now replacing:
[tex]0=8^{2} -2*9.81*y\\19.62*y=64\\y=3.26 [m][/tex]
Calculate Density:
Volume=43cm3, Mass=45g
Answer:
P= 1.04651 g/cm3
Explanation:
1. Two vectors have magnitudes 6 & 8 units, respectively. Find the maximum &
minimum resultant vectors.
nitsdoftboltant fuo vectors acting in the same direction is 20
Answer:
The maximum magnitude of their resultant is 14 units, and the minimum is 2 units
Explanation:
Resultant Vectors
When two or more vectors are added or subtracted, the resultant vector can be found by considering their magnitudes and directions.
Two vectors applied to the same point can produce a result that can vary from being completely collaborative or completely opposite.
If two vectors act in a collaborative form, their magnitudes are added and the result has the maximum possible magnitude. If they act in opposite directions, the result has the minimum possible magnitude.
Thus, being 6 and 8 units the magnitudes of the vectors, the maximum magnitude of their resultant is 14 units, and the minimum is 2 units.
force of 4 Newtons in 20 power output? 40 Nm/sec 2 Nm 2 Nm/sec 1
Answer:
P = 0.2 W
Explanation:
Given that,
Force, F = 4 N
Displacement, d = 1 m (say)
Time, t = 20 s
We need to find the power output. Power is the rate of doing work. So,
P = W/t
[tex]P=\dfrac{Fd}{t}\\\\P=\dfrac{4\times 1}{20}\\\\P=0.2\ W[/tex]
So, the required power is 0.2 W.
mechanical waves apply________to push molecules in their path?
(fill in the blank)
Answer:
what is the force of gravitational attraction between an object with a mass of 100 kg and another object that has a mass of 300 kg are at a distance of 2m apart
What is the difference and a similarity between constructive interference and destructive interference?
In constructive interference, waves that are in phase will combine together and increase the amplitude. In destructive interference, waves are out of phase and cancel one another out.
When two waves occupy the same point, superposition occurs. ... Constructive interference is when two waves superimpose and the resulting wave has a higher amplitude than the previous waves. Destructive interference is when two waves superimpose and cancel each other out, leading to a lower amplitude.
Complete the following math operations giving the answer with the correct significant digits.
510x30
Group of answer choices
15
150,000
15,000
150
Answer:
15,000
Explanation:
which hand is negatively charged?
A
B
C
D
Answer:
the one that has more negative sights so the first hand on your right :)
Answer:
b
Explanation:
_____ is the sum of all potential and kinetic energy.
Group of answer choices
Law of Conservation of Energy
Gravitational Potential Energy
Stored energy
Mechanical Energy
Answer:
mechanical energyis the sum of all potential and kinetic energy.hope it helps!
The intensity of a sound is another way to say the _________ of a sound.
frequency
amplitude
wavelength
loudness
Answer:
Frequency and tfcvvbyfgffhhi
Answer:
I think frequency
Explanation:
What does the universe contain?
A. Only stars and planets
B. Everything
Answer:
B
In my opinion. :)
Explanation:
PLEASEEEE HELP MEEEEE!!!! WILL GIVE BRAINLIST!
Which point is located at (4, –2)?
On a coordinate plane, point A is 2 units to the left and 4 units up. Point B is 4 units to the right and 2 units down. Point C is 4 units to the left and 2 units up. Point D is 2 units to the right and 4 units down.
A
B
C
D
Answer:
It is B
Explanation:
Answer:
the other guy is right im answering so you can give him brainliest have a nice day :)
Explanation:
The density of solid copper is 8960 kg/m3.
The density of molten copper is 7900 kg/m3.
Explain this difference in density by referring to the particle model and the arrangement of
atoms in the two states. (2)
Explanation:
The density of a solid copper is 8960kg/m^3 while the density of a molten copper is 7900kg/m^3 this is due to the difference in the state of matter, the solid copper is in solid state while the molten copper is in form of a liquid. In the solid copper atoms are tightly pack while they atom are not tightly packed.
Which of the following is a force?
Momentum
Friction
Acceleration
Velocity
Answer:
friction
Explanation:
have you not heard frictional force?
have you ever heard momentum force or acceleration force
hope this helps. if not. please report it and let someone else try it
An incandescent bulb is supplied with
100 J of energy every second and
transfers 5 J of energy by light
Calculate the efficiency of the bulb.
I need some help can you explain this to me please and thank you
Answer:
Efficiency = 5%
Explanation:
Given that,
Supplies energy to the bulb = 100 J
Transferred energy by the bulb = 5 J
We need to find the efficiency of the bulb. It can be given by "
[tex]\eta=\dfrac{\text{useful energy out}}{\text{useful energy in}}\times 100\\\\=\dfrac{5}{100}\times 100\\\\=5\%[/tex]
So, the efficiency of the bulb is 5%.
A paratrooper jumping from the plane lands safely ,why?
Zach drives his car around a circular section of a road having a radius of 50 meters at a constant speed of 20 m/s. What is the centripetal acceleration of Zach's car?
Answer:
Centripetal acceleration = 8m/s²
Explanation:
Given the following data;
Radius, r = 50m
Velocity, v = 20m/s
To find centripetal acceleration;
Centripetal acceleration = v²/r
Centripetal acceleration = 20²/50
Centripetal acceleration = 400/50
Centripetal acceleration = 8m/s²
Therefore, the centripetal acceleration of Zach's car is 8 meters per seconds square.