What happens to the mass of the substance when undergoing a physical change

The air in a kitchen has a mass of 60.0kg and a specific heat of 1505J / (kg°C). What is the change in thermal energy of the air when it warms from 24°C to 31°C? A) 90,300J B) 100,835J C) 630,000J D) 632,100J

A crate slides down a ramp that makes a 20∘ angle with the ground. to keep the crate from sliding too fast, paige pushes back on it with a 64 n horizontal force. part a how much work does paige do on the crate as it slides 3.6 m down the ramp?

What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is w = 1.75 m wide and h = 8.00 m below the top of the cliff?

When you perform an experiment it is important the measurements are accurate what determines the accuracy of a measurement? A. How close it is to the actual value. B. The number of times that it is repeated. C.

A charged particle is moving with speed v perpendicular to a uniform magnetic field. A second identical charged particle is moving with speed 2v perpendicular to the same magnetic field.

Why are there so few working wave power stations?

Two abiotic factor that effect an ecosystem are;

Which of the following is explained by general relativity? A. How massive stellar objects can form a lens. B. Why moving muons decay more slowly than stationary ones C. Why atomic clocks tick more slowly when in motion D.

Imagine that you're observing a collision. Which action would allow you to determine whether the collision is inelastic? A. Measure the force of impact. B. Observe whether the colliding objects change their shape. C.

When compared to other types of waves, electromagnetic waves differ because they are Select one: A. a form of energy. B. able to travel through a vacuum. C. all visible. D. able to move particles in a medium.