Light waves

A) Do not require a medium

B) can not travel through a vacuum

C) are not electromagnetic radiation

D) do not travel in straight lines from the source

What is 95°F on the Celsius scale?

A 1385 kg cannon containing a 58.5 kg cannon ball is on wheels. the cannon fires the cannon ball giving it a velocity of 49.8 m/s north. what is the initial velocity of the cannon the instant after it fires the cannon ball?

How do chemical and nuclear reactions differ? A. Chemical reactions involve conversions between matter and energy, while nuclear reactions do not. B. Nuclear reactions do not affect the nuclei of atoms, but chemical reactions do affect nuclei. C.

Which of the following is a good example of a contact force? Earth revolving around the Sun a bridge suspended by cables a ball falling downward a few seconds after being thrown upward electrically charged hairs on your head repelling each other and

How does friction with the atmosphere affect the speed of an artificial satellite

It is difficult to lift a heavy stone than the lighter one on the earth, why?

The vapor pressure of ethanol at 25 degrees C is 7.83 kPa. Calculate the vapor pressure in atm. Round answer to 3 significant digits.

According to Newton's second law of motion acceleration or an object depends upon the ___ of the object and the ___ Acting on it. I'm confused on what the blanks are. I can't find them.

What is the concentration of H + ions at a pH = 7?

Suppose that Paul D. Trigger fires a bullet from a gun. Will the speed of the bullet leaving the muzzle will be the same as the speed of the recoiling gun? Explain.