The changes that occur during puberty in girls are signaled by what hormone?

A car accelerates forward at 3.5 m/s2. If the car has a mass of 873 kg, what is the force applied to the car?

Calculate the impulse exerted when a 1-kg object falls on your foot if the contact time is 0.1 sec. (Hint: first find the weight of the object)

Heat engines converts what type of energy into mechanical energy? 1. chemical 2. thermal 3. nuclear 4. elastic

Is it possible for speed to be constant while acceleration is not zero? Physics

a. A rectangular pen is built with one side against a barn. 1900 m of fencing are used for the other three sides of the pen. What dimensions maximize the area of the pen? b.

Which of the following statements is true regarding the nature of light? Straight line motion is a particle property of light. Straight line motion is a wave property of light. Straight line motion is not a property of light.

A particle that is composed of two up quarks and one down quark is a (1) meson (3) proton (2) neutron (4) positron

Car headlights have both low beams and high beams. The high beams may be necessary when it is very dark outside. If the power for the high beam is 60.0 watts and the current is 5.0 amps, how much voltage is required?

Tsunami waves are almost the same as ripples caused by throwing a rock into a pond. what is the major difference between the two?

A hot air balloon pilot wants the balloon to quickly rise several feet higher so it will be above some trees in the distance. Which best explains how the pilot can make the balloon rise? 1.