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1. A diverging lens has a focal length of 71.5 cm. A real object is placed 30.9 cm in front of the lens. How far is the image located from the lens? (please give answer as a positive value) cm.
2. Which side of the lens is the image located on?
A. In front of the lens
B. Behind the lens
What will the traveler weigh on another planet. Two wires are identical, except that one is aluminum and one is iron. The aluminum wire has a resistance of 0.18 . What is the resistance of iron wire.
After an afternoon party, a small cooler full of ice is dumped onto the hot ground and melts. If the cooler contained 7.20 kg of ice and the temperature of the ground was 40.5°C, calculate the energy that is required to melt all the ice at 0°C. Th..
A 1.70 kg block is released from rest and allowed to slide down a frictionless surface and into a spring. The far end of the spring is attached to a wall.
An automobile emits 20 lbs of CO2 per gallon of gasoline burned. If the U.S. burns 200 million of gallons of gasoline every year, how many billions of lbs of CO2 are emitted every year?
How many kilograms of water at 100 degrees Celsius can be converted to steam by the addition of 1.13X10^7 joules of thermal energy.
A rocket is fired at a speed of 82.0 m/s from ground level, at an angle of 31.0 ° above the horizontal. The rocket is fired toward an 6.95-m high wall, which is located 18.0 m away.
A woman on a bridge 71.0 m high sees a raft floating at a constant speed on the river below. She drops a stone from rest in an attempt to hit the raft. The stone is released when the raft has 6.60 m more to travel before passing under the bridge. ..
How many kilograms of water at 100.0 C could be converted to steam by the addition of 1.13 x 10^7 joules of thermal energy.
Every day our Earth receives 1.55×1022 J energy from the Sun. If we were able to use 0.85 percent of this energy to accelerate spaceships, then how various missions will be possible in one year.
On a cool morning, when the temperature is 14.0 ^circC, you measure pressure in your car tires to be 20.0 psi. After driving 40.0 mi on the freeway, the temperature of your tires is 50.0 ^circC.
A 9.8-kg object oscillates at the end of a vertical spring that has the spring constant of 1.75 104 N/m. The effect of air resistance is represented by the damping coefficient b = 3.00 N•s/m.
A rotating wheel requires 6.00 s to rotate 30.0 revolutions, What is the constant angular acceleration (in rad/s) of the wheel
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