Why does a fluid become less dense when it is heated?

The streams and small rivers that feed into a main river are called

A satellite moves around the Earth in a circular orbit of radius r. What is the speed vi of the satellite?

starting from rest, a car accelerates at a rate of 10.7 m/s^2 for 12 seconds. what is its velocity at the end of this time?

How does an object look when it is viewed through an opaque object?

Identify the solutions and homogeneous mixtures in the list below. Check all that apply. lead solder, an alloy of tin and lead blood, a mixture of water, proteins, and cells ammonia, a compound of nitrogen and hydrogen window cleaner, a mixture of

A motorist driving at 25 meters/second decelerates to 15 meters/second. The combined mass of the vehicle and the driver is 1.5 * 10³ kilograms. What is the amount of mechanical work done by the vehicle?

All forces are different each exerts a particular type of effect on an object

Witch statement about polymers is true

Two bullets have masses of 3,0 g and 6.0g, respectively. both are fired with a speed of 40.0 m/s. Which bullet has more kinetic energy? What is the ratio of their kinetic energies

What does it mean that a form of energy might take more energy to harness than it provides? Are renewable resources always renewable, or can they become non-renewable? Why aren't renewable resources used for everything that we use energy for?