A penny falls from a windowsill which is 25.0 m above the sidewalk. How much time does a passerby on the sidewalk below have to move out of the way before the penny hits the ground?

When two air masses with different characteristics meet what happens

Constant speed has a slope of zero on a graph because no acceleration is taking place

A student pushes a box with a total mass of 50 kg. What is the net force on the box if it accelerates 1.5 m/s2? 51.5 N. 48.5 N 75N 33.3 N

Which of the following is the best example of a proper hypothesis? A) I think there is no effect on sleep if you are on your phone at night. B) Dogs that get treats behave better.

11. Which of the following would likely be the best reflector of heat energy? A. A gritty navy blue surface B. A bumpy red surface C. A dull orange surface D. A polished pale yellow surface

What uses electricity

How do the elements in the Noble Gas family compare?

The magnetic field strength within a long solenoid isb=4.0t t, where t is time in seconds. if the radius of thesolenoid is1.0 cm, what is the magnitude of the non-coulomb force that acts on a6.0 c charge a distance6.

Which of these is not a conservative force and does not have a form of potential energy connected with it?

What is the effect of food color in the amount of food fish eat