You operate a 120 w light bulb for 5 minutes. how much energy did you use?

A train of mass 320000 kg accelerate uniformly from rest. It takes 57 s to travel a distance of 810 m in a straight line. Find the average net force acting on the train.

The process of science is exciting, dynamic, and unpredictable, but has little room for creativity. 1.) True 2.) False

Every real machine: must be more than 100% efficient must be equal to 100% efficient must be less than 100% efficient

An ideal refrigerator-freezer operates with a cop = 7.0 in a 20°c room. what is the temperature inside the freezer?

What are glacial grooves?

A truck moving at 45 m/s passes a police car moving at 36 m/s in the opposite direction. if the frequency of the siren is 500 Hz relative to the police car, what is the frequency heard by an observer in the truck after the police car passes the

How do you increase the mechanical advantage of a ramp?

Which of the following groups of moon phases are above the horizon at 8 am? A third quarter, waning crescent, and waxing gibbous OB. new Moon, third quarter, and waning gibbous OC. waxing gibbous, full Moon, waning gibbous O D.

The Yerkes refracting telescope has a 1.00 m diameter objective lens of focal length 20.0 m. Assume it is used with an eyepiece of focal length 2.50 cm. (a) Determine the angular magnification of the planet Mars through this telescope.

What must a mechanical wave travel through