Why is the universe here and why do we exist?

A microwave oven operates at 2.50 ghz. what is the wavelength of the radiation produced by this appliance?

A grocery shopper tosses a 9.0 kg bag of rice into a stationary 18.0 kg grocery cart. The bag hits the cart with a horizontal speed of 5.5 m/s toward the front of the cart. What is the final speed of the cart and bag

An AC generator has a maximum output emf of 4.20 x 102 V. What is the rms emf? (Remember ΔVrms = 0.707Vmax)

A scientist hypothesizes that the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female.

Consider the position of a ball thrown down with an initial speed of 15.0 m/s. what will be its position after 2.16 s? let the initial position be 0. the acceleration due to gravity is 9.806 m/s 2.

Ethylene (C2H4) reacts with oxygen gas to produce carbon dioxide and water. 45.0 grams of ethylene reacts, how many grams of carbon dioxide gas will be produced?

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.