Which of the following describes the efficiency of real machines?

A. Efficiency is 100%

B. IMA is always larger than the AMA

C. IMA is always smaller than the AMA

D. IMA is equal to the AMA

Check all that apply. An ammeter is used to measure current. An ammeter must be placed in parallel with a resistor to measure the current through the resistor. An ammeter has a large internal resistance. A voltmeter has a small internal resistance.

Why does the ballon stick to the wall after it is rubbed on the wool sweater?

The electric field across the plates of a capacitor will decrease if the plate separation ___ and the potential is not changed. decreases increases

Convert the filling metric measurements 59.97 Kg to g

What are characteristics of a moist, unstable air mass?

Why do comets have tails?

The main characteristic of all vertebrates is the presence of a. cartilage b. a large brain c. a backbone d. an exoskeleton I got it. The answer was B

A projectile is thrown upward so that its distance above the ground after t seconds is h (t) equals negative 16 t squared plus 704 t. a) Find the maximum height the object reaches. b) Find the time it takes the object to reach the ground.

You are standing 100 meters from an object emitting a sound of constant intensity (loudness). You walk toward the source of sound until you are 20 meters from it. From your perspective, what has happened to the intensity of the sound?

What is the peak emf generated by a 0.250 m radius, 500-turn coil is rotated one-fourth of a revolution in 4.17 ms, originally having its plane perpendicular to a uniform magnetic field. (This is 60 rev/s.)