Heat transfer that doesn't need a medium?

A) Radiation

B) Convection

C) Conduction

Which of the following is true regarding the speed of earthquake waves?

What is the resistance of a toaster that uses 2A when connected to a 120V power source?

When two horizontal forces are exerted on a cart, F1 = 650 N forward and F2 = 400 N backward, the cart undergoes acceleration.

In the 25-ft Space Simulator facility at NASA's Jet Propulsion Laboratory, a bank of overhead arc lamps can produce light of intensity 2500W/m2 at the floor of the facility. (This simulates the intensity of sunlight near the planet Venus.

What is happening at the atomic level to give rise to the observed energy?

The kinetic energy of a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest.

Imagine standing on a bathroom scale and reading your weight. now lift one foot and read your weight again. does the scale read more, less or the same weight when you are standing on one foot?

The period T of a simple pendulum depends on the length L of the pendulum and the acceleration of gravity g (dimensions L/T^2). (a) Find a simple combination of L and g that has the dimensions of time.

What is an example of the theory that the best adapted organisms for an environment are the ones most likely to survive

What does not affect the apparent brightness of a star?