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1. An electronic device has a resistance of 20Ω and a current of 15A. What is the voltage of the device?
2. A 3V potential difference is applied to a 6Ω resistor. What is the current that flows into the resistor?
3. A subwoofer needs a household voltage or 110V to push a current of 5.5A through its coil. What is the resistance of the subwoofer?
a tank of base area 120cm by 80cm contains water to a depth of 50cm, if the base has a side outlet of diameter 16cm, what would be the required force to push the water through the base outlet?
How high should a 2 kg mass be lifted from the ground if it is thrown upward at speed of 15 m/s? ( Assume g=10 m/s²)
A 3.5-kg computer printer is pushed at a constant velocity across a desk with a horizontal force. The coefficient of kinetic friction between the printer and the desk is 0.36.
a) Calculate the magnitude of the normal force acting on the printer.
b) Calculate the magnitude of the kinetic friction acting on the printer.
The normal force between a snowmobile and the snow has a magnitude of 2200 N; the horizontal force needed to get the snowmobile to just start moving has a magnitude of 140 N. Calculate the coefficient of static friction is this case
What happens to the force between two charged metal spheres in a vacuum if the charge on each is doubled and the distance between them is multiplied by three.
A charge of 12 uC when placed in electric field experiences a force of 648 N. What is the magnitude of the electric field strength.
Two charges of +8.0mC and -6.0 mC attract each other with a force of 3.0x103 N in a vacuum. What is the distance between the charges.
Find the electrostatic force between charges of +2.0 C and +5.0 C separated by a distance of 75m in a vacuum.
A lead pellet is propelled vertically upward by an air rifle with an initial speed of 50 ft/s. Find its maximum height ?
