Why is the work output of any real machine less than the work needed to operate it

If the plant with the genotype Rr crossed with another plant with the genotype Rr, what are the possible genotypes of the offspring.

Determine the inductance l of a 0.55-m-long air-filled solenoid 2.7 cm in diameter containing 9000 loops.

Which rock would have the fastest rate of weathering in a warm, wet climate? limestone quartz-cemented sandstone granite gneiss

Name the conditions required for 2 waves to interfere constructively

A 0.250 kg fan cart accelerates at 24 cm / s^2 for 4.5 seconds. what is the net force (fan thrust minus drag and friction) on the cart? How fast will it be going at the end of the 4.5 seconds?

If the abosolute of a gas is 600 k, the temperature in degrees Celsius is

How does an electromagnetic wave propagate itself? a. A changing magnetic field induces an electric field perpendicular to the magnetic field. b. A changing electric field induces a magnetic field perpendicular to the electric field. c.

Which of the following is an example of convection? A. hot air rising and cooler air falling B. a hot object transferring heat to a cooler one C. a hot oven warming the air around it D. the rays of the Sun warming the earth

A 50,000 kg locomotive is traveling at 10 m/s when its engine and brakes both fail. How far will the locomotive roll before it comes to a stop? Assume the track is level.

A rectangular loop of wire with sides 0.262 and 0.401 m lies in a plane perpendicular to a constant magnetic field (see part a of the drawing). The magnetic field has a magnitude of 0.