15. Electric power is the rate at which an appliance converts electric energy into other forms of energy. Electric y2
power is given by, P= VI = PR-
R
The given figure shows four bulbs 1, 2, 3 and 4, consume same power. The resistance of bulb 1 is 36 Q.
(1) What is the resistance of the bulb 3?
(a) 402
(b) 902
(c) 18
(d) 120
(11) What is the resistance of bulb 4?
(a) 422
(b) 80
(c) 999
(d) 182
(18) If power of each bulb is 4 W, then the total current flowing through the circuit is
(a) 1A
(b) 2 A
(c) 4A
(d) 12 A
(lv) What is the equivalent resistance of the circuit?
(a) 122
(b) 8
(c) 182
(d) 1602

The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.

Which of the the following are examples of projectile motion of both projectile motion and two dimensional motion