If an exit sign is hanging from the ceiling by three chains each of which has a tension of 15N what is the weight of the sign

What does not affect the gravitational potential energy of an object

Which of the following shows kinetic energy being converted into potential energy? A) a boulder rolling across the ground B) a rock being tossed high into the air C) a boulder falling off the edge of a cliff D) a rock sitting in the grass

El Niño is actually good news for some parts of the world that experience a decreased chance of severe weather events. True False

The speed of propagation of the action potential (an electrical signal) in a nerve cell depends (inversely) on the diameter of the axon (nerve fiber). If the nerve cell connecting the spinal cord to your feet is 1.

A batter hits the a baseball so that it leaves the bat with an initial speed 37mps at an angle of 53degree find the position of ball after 2 second

Acceleration is a scalar quantity true or false

Find a numerical value for rhoearth, the average density of the earth in kilograms per cubic meter. Use 6378km for the radius of the earth, G=6.67*10-11m3 / (kg⋅s2), and a value of g at the surface of 9.80m/s2.

The driver of a car traveling at 32 m/s applies the brakes and undergoes a constant deceleration of 2.25 m/s^2.

The ability of an object to vibrate by absorbing energy at its natural frequency is called?

A hurricane in the Gulf of Mexico to 15 hours to travel 360 kilometers. What is the average speed of this hurricane in kilometers per hour?