Physics Answers

A 100 nC charge is placed at the origin. A -50 nC charge is placed at x= 5 cm and a 200 nC is placed at x= -10 cm.

What is the net electrostatic force acting on 200 nC charge?

A wound coil that has an inductance of 180mH and a resistance of 35 is connected to a 100V 50Hz supply calculate the impedance of the coil the current the power factor and the apparent power consumed

A container holds 2 moles of a diatomic gas at temperature T = 420K. At this temperature,

rotational motions (but not vibrational motions) of the gas molecules are allowed.

(a) What is the total internal energy of this gas? (2)

(b) A quantity of energy E = 300 Joules is transferred to the gas. What fraction of this added

energy is responsible for increasing the temperature of the gas? (1)

(c) How much did the internal translational energy increase, and thus how much did the temperature

of the gas increase? (4)

(d) Explain how the predictions from particle statistics fail, when describing the heat capacities

of a diatomic ideal gas.

a body requires a force of 100N to accelerate it at a rate of 0.2m/s^2. determine the mass of the body in kilograms and in slugs

Express the following answers in appropriate number of significant figures:

0.031s+1.63s

1. A voltage of 12 V is placed on a capacitor with C = 85 pF. (a) What is the charge on the capacitor? (b) How much energy is stored in the capacitor?

2. In open-heart surgery, a much smaller amount of energy will defibrillate the heart. (a) What voltage is applied to the 7 F capacitor of a heart defibrillator that stores 60.0 J of energy? (b) Find the amount of stored charge

3. Calculate the energy stored in a 5 μF capacitor charged to 30 V.

(2 uF)(-5 uF)

Three capacitors with capacitances 4 F, and 12 F are connected in series. A voltage of 400V is applied to the combination.Find the charge in each capacitor.(IN C)

Find the charge stored in a capacitor with a capacitance of 50 uF and a potential difference of 10 V.( In C and uC)