Suppose the mechanical advantage of a machine is 4 and the input force is 20 N. What is the output force?

Would you expect the Earth's surface temperature to continue to rise if CO2 levels continue to increase but levels of atmospheric water vapor begin to decrease? Explain your reasoning

On a cold day (0 C) you observe a person far away from you hit a piece of metal with a hammer. Then 0.75 seconds later you hear the sound of the hammer hitting the metal. How far are you from the other person?

A bullet travels at 850 m/s. How long will it take a bullet to go 1 km?

A stranded soldier shoots a signal flare into the air to attract the attention of a nearby plane. The flare has an initial vertical velocity of 1500 feet per second. Its height is defined by the quadratic function below.

The mass at time t of a radioactive substance is m (t) = m (0) ekt, where m (0) is the initial mass and k=-0.000135. The mean life M of an atom in this substance is M=-k∫∞0tektdt=

What causes ice to melt and water to boil

A block of mass 3.5 kg slides down a frictionless inclined plane of length 6.4 m that makes an angle of 30 degrees with the horizontal. if the block is released from rest at the top of the incline, what is its speed at the bottom

What is the wavelength of an earthquake wave if it has a speed of 5 km/s and a frequency of 10 Hz?

The gamma ray released by each decay carries 140kev of energy. find the total energy e released by decays in the 2 hours.

Think of the last five things you read. Now think of a type of reading you havent done recenty have never read. What kind of pattern do you see in your reading? What is your favorite type of reading and your least favorite type of reading?