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A shopper in a supermarket pushes a cart with a force of 33 N directed at an angle of 25° below the horizontal. The force is just sufficient to overcome various frictional forces, so the cart moves at constant speed.
(a) Find the work done by the shopper as she moves down a 44 m length aisle.
J (b) What is the net work done on the cart?
J
A circuit with 2 capacitors, C1= 36.0 microF and C2=28.0microF, are hooked up in a series with each other, How much electric potential, V, is applied to the circuit
The inner and outer surfaces of a cell membrane carry a negative and positive charge, respectively. Because of these charges, What is the magnitude of the electric field in the membrane
During physic lecture a lone ant makes it way across the classroom floor in two distinct stages starting from the wastebasket, Calculate the magnitude and direction of the ants resultant displacement vector
A refrigerator has a coefficient of performance equal to 6.00. The refrigerator takes in 150 J of energy from a cold reservoir in each cycle, Find the work required in each cycle
A 150 kg hoop rolls along a horizontal floor so that the hoop's center of mass has speed of 0.180 m/s. How much work must be done on the hoop to stop it.
A rectangular block of ice 14.0 m on each side and 1.4 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3.
4 moles of an ideal gas have an initial temperature of 127 C. The temperature of the gas is kept constant and the volume is increases until the pressure drops to 40.0% of its original value. Calculate the heat added to the gas
How much energy is necessary to bring the system back
A spring with constant k=15 N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. it is then pulled down 6 cm and free. if the ball makes 30 oscillations in 20 seconds, what are its maximum speed.
Water at 25 degrees celius is pumped from 100kPa to 5MPa in a pump with an efficiency of 75%, Calulate the temperature rise in the real pump
A 165 pF capacitor is connected in series with an unknown capacitor, and as a series combination they are connected to a battery with emf of 21.3 V. If the 165 pF capacitor stores 112 pC of charge on its plates, what is the unknown capacitance.
A certain speed boat weighs 5,880 N. It can accelerate from 0 to 40 m/s in 5 seconds. (Need to see the math). How large is the net force acting on the boat
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