How many lenses does a compound microscope have

An object with a mass of 100 grams is dropped from a certain height and has a velocity of 60 meters/second. if the potential energy of this object is 179.99 joules, how high was the object when it was dropped?

initially at rest. The bullet is traveling 300 m/s when it hits the wood block and sticks inside it. Now the bullet and the wood block move together as one object. How fast are they traveling?

Two different MOS capacitors, with different gate-oxide thicknesses (3 nm and 15 nm), have the same density of positive oxide charge (Noc = 5 x 1010 cm-2) close to the oxide-semiconductor interface.

In what phase of matter do molecules vibrate but stay in position? A. gas B. liquid c. solid d. plasma

An Object with a mass of 40kg is moving at a velocity of 10 m/s. Determine its kinetic energy

Consider a helium balloon on a string tied to the seat of your stationary car. The windows are closed, so there is no air motion within the car. The car begins to accelerate forward. Which way will the balloon lean, forward or backward

The force of gravity acts upon meteors from the rocky asteroid belt between mars and Jupiter. Where is the force of gravity most likely to pull these meteors

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. Which of the following best describes how such a telephone is able to transmit and receive information? A.

Calculate the gravitational potential energy relative to the ground when an 82 kg person climbs to the top of a 2.0 m stepladder.

A rock is thrown from a cliff and hits the ground five seconds later at a distance of 50 m from the cliff how high was a cliff