A circuit has a voltage drop of 12 V across a 30 2 resistor that carries a

current of 0.8 A. How much power is used by the resistor? Use P = VI.

A. 360 W

B. 12W

C. 9.6 W

D. 24 W

A proton has an initial speed of 3.7*10^5 m/s. a) What potential difference is required to bring the proton to rest? (V) b) What potential difference is required to reduce the initial speed of the proton by a factor of 2?

A paper airplane is thrown westward at a rate of 6 m/s. The wind is blowing at 8 m/s toward the north. What is the actual velocity of the airplane?

The value of a car after 5 years is a quantitative data. True or False

A motor with an operating resistance of 32 ohms is connected to a voltage source. the current in the circuit is 3.8 a. what is the voltage of the source?

A 1.0-mol sample of hydrogen gas has a temperature of 27◦C. (a) What is the total kinetic energy of all the gas molecules in the sample? (b) How fast would a 65-kg person have to run to have the same kinetic energy?

The act, process or state of the change in place or position oa a body with respect to time and relative to the observer is said to be : - 1. Rest 2. Stationary 3. Motion 4. None of the above

During a snowball fight two balls with masses of 0.4 kg and 0.6 kg, respectively, are thrown in such a manner that they meet head on and combine to form a single mass of 1 kg. the magnitude of intial velocity foreach is 15 m/s.

Which phases of matter do molecules have the lowest amount of energy?

How many Oxygen (O) atoms are in the following? H2O + CO2 4 3 2

How does surface roughness affect friction