A ___ is a machine which contains a lever and wedge that combine to make work easier.

How do you explain the fact that sometimes less work is done in a situation in which more force is used than in a situatio in which less force is used

All matter can be described by using what properties

A rock is dropped from a bridge. what happens to the magnitude of the acceleration and the speed of the rock as it falls?

A 4-W night-light is plugged into a 120-V circuit and oper - ates continuously for 1 year. Find the following: (a) the current it draws, (b) the resistance of its filament, (c) the energy consumed in a year.

Which is a set of valid quantum numbers? n = 4, l = 4, m = 4 n = 1, l = - 2, m = 0 n = - 1, l = 0, m = 0 n = 4, l = 3, m = 3

What is a radio interferometer? a device for correcting chromatic aberration in radio telescopes a device for absorbing and transmitting radio waves a network of several radio telescopes wired together a radio communication network joining several

In which galaxy is our solar system located? a. milky way b. ngc 4414 c. andromeda d. small magellanic cloud

Two astronauts, of masses 60 kg and 80 kg, are initially right next to each other and at rest in outer space. They suddenly push each other apart. How far has the heavier astronaut moved when the lighter astronaut has moved 12 m

A person suffering from anaemia gets tired

Jessica took a Mylar balloon outside on a very hot day. As she waited for the bus the balloon began to get bigger. What is the best explanation of this?