Why is speed classified as a scalar quantity and velocity classified as a vector quantity?

The best time to exercise is

The temperature on land around the equator stays about the same throughout the year. This is because this area A) has a greater tilt than other parts of the Earth. b) receives less direct sunlight throughout the year.

Consider a ball (with moment of inertia I=2/5MR^2) which bounces elastically off a surface. Assume that the ball's speed in the direction perpendicular to the surface is the same before and after a bounce.

Select each correct answer. More than one answer may be correct. Unicellular organisms are made up of only one cell. Multicellular organisms are made up of more than one cell.

Determine the velocity of a beam of electrons that goes undeflected when moving perpendicular to an electric and magnetic field. The electric field and the magnetic field are also perpendicular to each other and have magnitudes 7.7 x 10^3 V/m and 7.

An open-topped freight car with mass 24,000 kg is coasting without friction along a level track. It is raining very hard, and the rain is falling vertically downward. Originally, the car is empty and moving with a speed of 4.00 m/s.

Photons travel outward from a light bulb in

The critical angle for a beam of light passing from water into air is 48.8°. this means that all light rays with an angle of incidence in the water that is greater than 48.8° will be

A basketball is filled with air and has a small hole. Explain why the basketball would leak.

Aligned magnetic domains are only present in which of the following? A) permanent magnets B) temporary magnets C) all magnetic material D) depends on the situation