How does an increase in temperature affect the volume of a liquid or gas

What is tan(61)? а. 1.80 b. 0.49 c. 0.61 d. 0.87

Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.

Mixing salt in water is an example of physical change