An electric motor has an effective resistance of 32.0 ohms and an inductive reactance of 45.0 ohms when working underload. The rms voltage across the alternating source is 420 V. Calculate the rms current

Which is the best example of the law of conservation of energy? A) A basketball stops bouncing because its energy disappears. B) A rolling skateboard slows down because some of its kinetic energy changes to heat.

Light traveling in water (n=1.33) moves with what speed? (a) 1.5 x 10^8 m/s (b) 2.26 x 10^8 m/s (c) 3 x 10^8 m/s (d) 3.99 x 10^8 m/s

A gas has a volume of 8.21 mL and exerts a pressure of 2.9 atm. What new volume will the gas have if the pressure is changed to 4.0 atm.

An isometry preserves orientation distance direction

What is magnitude in physics?

Summarize Newton's First Law

13. How is 0.00069 written in scientific notation? A. 69 x 10-5 B. 6.9 x 104 C. 0.69 x 10-3 D. 6.9 x 10-4

A 1300 kg sports car accelerates from rest to 95 km/h in 7.4 s. What is the average power delivered by the engine?.

Two children playing on a frictionless garden gate invent a new game called "gate". The idea is that they will get on opposite sides of the gate and each push such that the gate does not move.

What is the frequency of 20 mm microwaves? A) 100 MHz B) 400 MHz C) 15 GHz D) 73 GHz E) 98 GHz