What is the velocity of a 500-kilogram elevator that has 4,000 joules of energy?

Answers

Answer 1
Answer:

The velocity of a 500-kilogram elevator that has 4,000 joules of energy is 4m/s.

KINETIC ENERGY:

  • The kinetic energy of a substance is its energy during motion. It can be calculated using the formula below:

K.E = ½m.v²

Where;

m = mass of the elevator (kg)

v = velocity of the elevator (m/s)

  • According to this question, the energy of the 500kg elevator is given as 4,000 joules, hence, the velocity can be calculated as follows:

V = √K.E × 2/m

V = √4000 × 2/500

V = √8000/500

V = √16

V = 4m/s

  • Therefore, the velocity of a 500-kilogram elevator that has 4,000 joules of energy is 4m/s.

Learn more: brainly.com/question/10703928?referrer=searchResults

Answer 2
Answer: The Energy is Kinetic Energy.

Kinetic Energy = 1/2*mv²,  Where m is mass in kg, v is velocity in m/s

Energy is 4000 Joules,  v = ?
mass, m = 500kg

1/2*mv² = E

1/2*500*v² = 4000

v² = (2*4000) / (500)     Using a calculator

v² = 16     Taking square root

v = √16

v = 4 

Velocity  of object is 4 m/s.

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In a nuclear fusion reaction, what state is matter in?a. gas
b. solid
c. liquid
d. plasma

Answers

the matter is in chemical plasma
 

Alternatively d)


I hope I was helpfull




Answer:

plasma

Expl

This other guy said it was plasma

a cylinder of mass 34.5 kg rolls without slipping on a horizontal surface. At a certain instant, its center of mass has a speed 9.5 m/s. Determine the rotational kinetic energy

Answers

Answer:

\displaystyle 778,40625\:J

Explanation:

\displaystyle (1)/(2)mv^2 = KE

* For cylinders, it is unique. Since you have two circular bases, you take half the mass in the formula:

\displaystyle (1)/(4)mv^2 = KE \n \n (1)/(4)[34,5]9,5^2 = KE → \displaystyle (1)/(4)[34,5][90,25] = 778,40625\:J

I am joyous to assist you anytime.

Answer:

778 J

Explanation:

Rotational energy is:

RE = ½ Iω²

For a solid cylinder I = ½ mr².

Rolling without slipping means ω = v/r.

RE = ½ (½ mr²) (v/r)²

RE = ¼ mv²

Plug in values:

RE = ¼ (34.5 kg) (9.5 m/s)²

RE ≈ 778 J

Round as needed.

Which of the following graphs best shows the velocity v of the clay ball from when it is dropped until it hits the ground?

Answers

Answer:

The correct option is;

C

Explanation:

The given information is that a clay ball is dropped from a certain height.

Therefore, the clay ball has an initial potential energy and zero kinetic energy

Which gives that the initial velocity of the clay ball = 0

As the potential energy is converted into kinetic energy, the velocity of the clay ball increases

However, if the direction of measurement of the velocity is opposite to the direction in which the clay ball is falling, the velocity of the ball progressively increases negatively as shown in option C

Final answer:

A graph of the clay ball velocity from the moment it's dropped until it hits the ground would be a straight line with a negative slope. This is because the velocity increases in the negative direction as the ball accelerates downwards under the force of gravity.

Explanation:

The graph showing the velocity v of a clay ball from when it's dropped until it hits the ground would look like a diagonal line descending from left to right with a negative slope. This is because the moment the clay ball is dropped, it starts accelerating downwards under the force of gravity. Therefore, its velocity increases in the negative direction, making the velocity-time graph a straight line with a negative slope. The slope represents the acceleration due to gravity.

Learn more about Velocity-Time Graph here:

brainly.com/question/32824917

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All atoms of the same element must have the same number of

Answers

Explanation:

Atomic number is defined as the total number of protons present in an element.

Each element of the periodic table has different atomic number because each of them have different number of protons.

For example, atomic number of Na is 11, and atomic number of Ca is 20.

On the other hand, atomic mass is the sum of total number of protons and neutrons present in an atom.

For example, atomic mass of nitrogen is 14 that is, it contains 7 protons and 7 neutrons.

Thus, we can conclude that all atoms of the same element must have the same number of protons.

Answer: Protons

Explanation: The number of protons corresponds to the atomic number.

A moving 46.6 kg sled feels a 52.9 N friction force. what is the coefficient of friction

Answers

Answer:

The coefficient of friction of the sled is 0.115

Explanation:

It is given that,

Mass of the sled, m = 46.6 kg

Frictional force acting on it, F = 52.9 N

We need to find the coefficient of friction. Frictional force is given by :

F=\mu mg

\mu=(F)/(mg)

\mu=(52.9\ N)/(46.6\ kg* 9.8\ m/s^2)

\mu = 0.115

So, the coefficient of friction of the sled is 0.115. Hence, this is the required solution.                     

Aiden takes 0.10s to throw a baseball, which leaves his hand with a velocity of 49m/s. The balls acceleration is

Answers

Since the ball was not moving before it let Aiden's hand, the formula used to calculate the acceleration is
a =  (v)/(t)
, where a is acceleration, v is velocity and t is the time. We put them in the formula and get
a =  (49)/(0.1)  \n a =  (490)/(1)  \n a = 490
The acceleration is 490 m/s^2