An electric heater is rated at 400 watts when used in a 110 V circuit. The safety fuse can handle 12 amps of current. How many heaters can be safely operated in the circuit?
Caruso is said to have made a crystal chandelier shatter wit…
Caruso is said to have made a crystal chandelier shatter with his voice. This is a demonstration of
An object that has gravitational potential energy must be
An object that has gravitational potential energy must be
My sister at a height of 25 m has a potential energy of 22,5…
My sister at a height of 25 m has a potential energy of 22,500 Joules. What is her mass?
I lift my 40 kg son to a height of 1 meter, while he lifts m…
I lift my 40 kg son to a height of 1 meter, while he lifts me (80 kg) to a height of 0.5 m. My son did _______as I did.
A 10 kg brick and a 1 kg book are dropped in a vacuum. The f…
A 10 kg brick and a 1 kg book are dropped in a vacuum. The force of gravity on the 10 kg brick is
The speedometer of an automobile reads
The speedometer of an automobile reads
If you are travelling at a speed of 55 miles/hour, what is y…
If you are travelling at a speed of 55 miles/hour, what is your speed in meters/second?There are 1609 meters in a mile.
A 10 N falling object encounters 6 N of air resistance. The…
A 10 N falling object encounters 6 N of air resistance. The net force on the object is
The number, 6.96×105, could also be written as
The number, 6.96×105, could also be written as