An ice sheet 5m thick covers a lake that is 20m deep. what is the temperature of the water at the bottom of the lake? explain your answer. coefficient of volume expansivity at 20 degree centigrade is 2.1x10^-4

The total force acting on an object is equal to ... A.) it's mass times acceleration B.) it's weight times it's acceleration C.) it's acceleration divided by its mass D.) it's mass divided by its acceleration

During an observation, it was noticed that light travels as bundles containing certain amounts of energy. What does this evidence reveal about light? A. It travels at a finite speed. B. It demonstrates a behavior of particles. C.

The third harmonic of a guitar string has a frequency of 170 Hz. What is the length of the guitar string if the speed of the waves on the string is 125 m/s? 1.103 m 2.206 m 0.368 m 2.040 m

Sound can pass from one paper cup to another through a long, taut string that connects their bottoms. What type of wave is present in the string when your voice shakes the bottom of your cup in and out and your friend hears your voice from the other

There are two main types of wave, transverse and longitudinal. Which type are sound waves?

If a car rolls gently off a vertical cliff, how long does it take to reach 90km/hr.

In the game of volleyball, what skill relates to Newton's second law

The minimum breaking distance d in feet for a typical vehicle can be modeled with the equation d (v) = 0.045v2, where v is the vehicle's speed in miles per hour.

A 2kg blob of putty moving at 4 m/s slams into a 6kg blob of putty at rest what is the speed of the to stick together blobs immediately after colliding

A stone is thrown vertically upward with a speed of 12m/s from the edge of a cliff 70 m high (a) How much later it reaches the bottom of the cliff? (b) What is its speed just before hitting? And (c) what total distance did it travel? (Ans: 5.