If displacement is not changing as a function of time then what is velocity

What happens to the density of a substance when it's heated? Explain?

A certain brand of hotdog cooker works by applying a potential difference of 130 V across opposite ends of a hot dog and allowing it to cook by means of the thermal energy produced. The current is 12.

If you were to drop an egg on concrete would it crack it

Two people push on the same door from opposite sides as shown. A man pushes on a door from the left. A woman pushes on the door from the right. They will only see the door move when both people exert the same force so that the forces are unbalanced.

A fan is to accelerate quiescent air to a velocity of 12.5 m/s at a rate of 9 m3/s. Determine the minimum power that must be supplied to the fan. Take the density of air to be 1.18 kg/m3.

Is the muzzle velocity a scalar or vector quantity?

How many day does it take the sun to came out?

Using the word "more" to mean "I want another cookie" is an example of a (n) :

Ohm's law is I = V : R. What is the current of a circuit with a 3.0-volt battery and 1.0 ohm of resistance? The current of a circuit with a 3.0-volt battery and 1.0 ohm of resistance is (blank) amps.

Why do marine west coast climates have much precipitation