A northfield raider defensive back runs 20 m in 2.5 s what's the average speed

At the Earth's surface, warm air expands and rises, leaving behind what is known as an area of; cold air is dense and sinks to the surface to create what is known as an area of

X-rays travel in vacuum at a higher speed than the visible light. (A) True (B) False

An electric appliance draws 1.5 amperes of current when it is connect 24-volt source. What is the resistance of this appliance? (5F) F 0.063 ohm G 11 ohm H 16 ohm 54 ohm

Consider two cylindrical conductors made of the same ohmic material. v1 ~e1 i1 ℓ1 r1 b v2 ~e2 i2 ℓ2 r2 b if rho2 = rho1, r2 = 2 r1, ℓ2 = 2 ℓ1, and v2 = v1, find the ratio r2 r1 of the resistances

You need to get to class, 200 meters away, and you can only walk in the hallways at about 1.5 m/s. (if you run any faster, you'll be caught for running). How much time will it take to get to your class?

An airplane flies due west (i. e. in the-X direction) between two airports. For one-quarter of the distance it travels at 650.0 km/h and the rest at 750.0 km/h. What is the average velocity (not speed) of the airplane?

1. The "Opportunity" rover that just landed on Mars transmitted music back to Earth. If the distance to Earth at the time was 9x107 km and radio waves (a kind of "light") travel with a speed of 3x108 m/s, how long did it take for the signal to reach

Precipitation is most likely occurring at A because it is located A. On a cold ocean surface B. On a warm land surface C. Near the cold front D. Near the warm front

A truck moving at 45 m/s passes a police car moving at 36 m/s in the opposite direction. if the frequency of the siren is 500 Hz relative to the police car, what is the frequency heard by an observer in the truck after the police car passes the

How do you increase the mechanical advantage of a ramp?