lighting and thunder accour at the same time yet we see the flash of lightning before we hear the clap of thunder what does this indicate about the speed of light compared with the speed of sound

A 47.4 kg student runs down the sidewalk and jumps with a horizontal speed of 42 m/s onto a stationary skateboard Both the student and skateboard move down the sidewalk with a speed of 3.95 m/s. What's the skateboard's mass?

How do you convert 2.998 m/s to km/hr?

Why is it important to examine materials at the atomic level? Atomic properties reveal if a material can be viewed as a particle or a wave. Atomic properties allow the scientist to know how many electrons the material has.

A small boat coasts at constant speed under a bridge. A heavy sack of sand is dropped from the bridge onto the boat. The speed of the boat a. does not change. b. increases. c. Without knowing the mass of the boat and the sand, we can't tell. d.

The total power input to a pumped storage power station is 600 MW The useful power output is 540 MW calculate the efficiency of this pumped storage power station

A 0.8kg object accelerate at a rate of4 m/s2. What is the net force acting on a object

Which of the following is the best definition of an isotope? A. elements of the same kind with different numbers of neutrons B. elements of the same kind that have lost electrons C. elements of the same kind that have different electrical charges

Two cars approach each other; both cars are moving westward, one at 85 km/h, the other at 54 km/h. what is the magnitude of the velocity of the first car relative to (in the frame of reference of) the second car? answer in units of km/h.

What usually causes high concentration of minerals to form

The courtroom role that possesses the most discretion is?