Why is it that the properties of pure substance do not vary from sample to sample

Which best describes the energy of a sound wave as it travels through a medium a. it remains the same b. It increases. c. It depends on the medium d. it decreases

The average velocity of a bus is 15 m/s. If it starts off going 15m north and then 20m south, how long will the bus ride take?

Suppose that the resistive force of the air on a skydiver can be approximated by f = - bv2. If the terminal velocity of an 82.0 kg skydiver is 33.4 m/s, what is the value of b (in kg/m) ?

The rat at which velocity changes with respect to a change in time is called

Formula of relative displacement

A body is moving with a velocity of 12m/s and it comes to rest in 2 minutes, what was the acceleration?

How can you find magnitude of velocity from a displacement time graph of an object?

Consider two rocks with masses of 1 and ten kilograms. What is the relation between their inertia's? Between their masses? Between their weights on earth?

If a cart of 4 kg mass has a force of 8 newtons exerted on it, what is its acceleration?

Why does the liquid thermometer work?