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3 years ago

What is conservation energy?

Physics

1 answer:

slega [8]3 years ago

8 0

Explanation:

Conservation of energy, principle of physics according to which the energy of interacting bodies or particles in a closed system remains constant

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Describe the conditions necessary for sublimation to occur.

lozanna [386]

To answer this question with specific values, you would need a phase diagram for the substance in question. In more general terms, the pressure needs to be lower than the pressure of the triple point, the substance must be present in its solid state, and the temperature must rise high enough to produce a gas.

7 0

4 years ago

Read 2 more answers

You take a 3 hour nap on a train traveling 40 miles per hour

Svetradugi [14.3K]

Answer:

120 miles

Explanation:

Speed = distance traveled/ time taken.

Distance traveled = speed * time taken

Speed = 40 miles per hour, time = 3 hours.

Distance = 40*3

The train's traveled distance is 120 miles.

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4 years ago

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If a gas is heated up， how does this affect the motion of its particles？

crimeas [40]

In gases, temperature relates to its kinetic energy — the hotter the gas, the faster the particles will move (for example, if we take that the formula of kinetic energy is Ek = 3/2 * k * T where k iz Boltzmanns constant and T is temperature, we see that kinetic energy — which is the energy an object has when its moving — only really depends on the temperature.)

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3 years ago

2. Calculate; The acceleration of any object due to Earth's gravity is -9.81 m/s. For every

RideAnS [48]

As the time of motion increases, the velocity of the object increases downwards.

The given parameters;

acceleration due to gravity, g = -9.81 m/s²
velocity of the object, v₀ = 9.8 m/s

The final velocity of the object at different time is calculated as follows;

when the time = 1 second;

v = v₀ - gt

v = 9.8 - 9.8(1)

v = 0

when the time = 2 second;

v = v₀ - gt

v = 9.8 - 9.8(2)

v = -9.8 m/s

when the time = 3 second;

v = v₀ - gt

v = 9.8 - 9.8(3)

v = -19.6 m/s

Thus, we can conclude that as the time of motion increases, the velocity of the object increases downwards.

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3 years ago

A 20Kg box is pushed across the floor at a constant velocity with a force of 200N. What is the

Shkiper50 [21]

Answer:

The kinetic coefficient of friction between the box and the floor is 1.020.

Explanation:

Let suppose that box is on horizontal ground. According to the Newton's Laws, an object has a net acceleration of zero when either is at rest or moves at constant velocity. Friction is a reaction to the external force that moves the box. Hence, the equation of equilibrium for the 20-Kg box is:

$\Sigma F = F-f = 0$ (Eq. 1)