A car not engine has an efficiency of 22.0%. it operates between constant temperature reservoirs with a difference of 75d degrees Celsius. what are the temperature of the two reservoirs

A boat is trying to head due west across a river at 20 m/s. If the river current pushes it off course by flowing 15 m/s due south, what would be the resultant velocity of the boat? If the river is 600 m wide how long does it take to get across?

Electrons have four important roles in biological systems: forming covalent bonds, transferring energy from the environment, forming free radicals, and which other function?

A fisherman is reeling in a fish. In 6.6 s he winds 2.8 m of fishing line onto a reel whose radius is 3.8 cm (assumed to be constant as an approximation). The line is being reeled in at a constant speed. Determine the angular speed of the reel.

Migratory birds are able to use the earth's magnetic field to navigate even when clouds and darkness prevent them from having visual references for their flight.

The acceleration due to gravity is g at the earth's surface. an earth satellite is orbiting at a distance from the earth's surface equal to one earth radius. at this location, what is the acceleration due to gravity

An astronaut on the planet Trappist-1b tosses a rock horizontally with a speed of 7.95m/s. The rock falls through a vertical distance of 2.35m and lands horizontal distance of 9.57m from the astronaut.

Whicg of the following is not a force that would act on a bicycle as it moves down a street gravity air resistance fluid friction sliding friction

A student holds a magnet 1 m from a paper clip and sees no evidence of a force acting between the two. When the student brings the magnet 1 cm away from the paper clip, the paper clip begins to slide toward the magnet.

According to Newton's 3rd Law, an object's momentum depends on it's velocity and mass. 4 dog-sled teams competed to see who could gain the greatest momentum.

When resistors are connecting in a series, does the position of ammeter make any difference?