57. A 10002 resistor is connected across a18V battery. How much current is there through the resistor? 58. Three amperes of current are measured through a 27002 resistor connected across a voltage source. How much voltage does the source produce? 59. Six volts are applied across a resistor. A current of 2.35mA is measured. What is the value of the resistor?

A man pushes a lawn mower on a level lawn with a force of 192 N. If 45% of this force is directed forward, how much work is done by the man in pushing the mower 6.5 m?

If 6 J of work are needed to stretch a spring from 6 cm to 8 cm and 10 J are needed to stretch it from 8 cm to 10 cm, what is the natural length of the spring? cm

A weight lifter raises a 100 kg barbell to a height of 2 m. what is the barbell's potential energy? Calculate answer to one decimal.

A box is lifted to a height of 6 meters in 3 seconds. If the lift required 400 watts of power, what was the mass of the box?  a 10 kg  b 15 kg  c 20 kg  d 25 kg

In recent years, there has been a large push for an increase in the use of renewable resources to produce the energy we need to power our vehicles. One of the newer fuels that has become more widely available is E85, a mixture of 85% ethanol and 15% gasoline. Despite being more environmentally friendly, one of the potential drawbacks of E85 fuel is that it produces less energy than conventional gasoline. Assume a car gets 27.5 mi gal using gasoline at $3.50/gal and 21.5 mi gal using E85 at $2.85/gal. How much will it cost to drive 700. miles using conventional gasoline fuel? How much will it cost to drive 700. miles using E85 fuel?

A man pushes a lawn mower on a level lawn with a force of 194 N. If 49% of this force is directed forward, how much work is done by the man in pushing the mower 4.9 m?

A force of 45.5 N is applied to a 14.3 kg object. The object moves 3.76 m in the opposite direction of the applied force. How much work is done on the object by this applied force?

If the average household in a region consumes about 5,250 kWh of energy per year. In the region, the average annual solar energy potential is about 1,450 kWh/m² per year. If solar panels are available in sizes of 1 m x 1 m with an efficiency of 18 %, how many panels will be needed to power a house? (Since you can't have a fraction of panel, always round up you number to the next integer.) Your Answer: Answer

Imagine a small moon with a mass equal to 1.3 times the mass of the Earth's moon.  How much work is done y this moon on a 1,331 kg meteor which comes from outer space and impacts the surface of the moon? You should assume that the radius of this moon is equal to the radius of Earth's moon. Where the radius of Earth's moon = 1,738 km.