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A charge of -3.89C is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.0809 m). The charges on the circle are -4.74C at the position due north and +7.12C at the position due east. What is (a) the magnitude and (b) direction of the net electrostatic force acting on the charge at the center? Specify the direction as an angle relative to due east.
A volleyball is spiked so that its incoming velocity of +4.0m/s is changed to an outgoing velocity of -21 m/s. What impluse does the player apply to the ball
A laser pointer has a beam intensity of 36 W/m2 and a beam radius of 2.4 mm. A first grader attempts to use it to move a black toy car. what is the force on the car
A 9.0 ohm resistor and a 6.0 ohm resistor are connected in series with a power supply. Find the voltage setting of the power supply
suppose the original experiment is done on the Moon, where g, the acceleration due to gravity, how will the graph compare to the original graph
Two small insulating spheres with radius 9×10-2 are separated by a large center-to-center distance of 0.52. One sphere is negatively charged.
On the Moon, the average surface temperature is 127 ?C during the day and -183 ?C during the night. What is the corresponding change on the Fahrenheit scale
You decide to move your desk so your back is not facing the door. As you begin to move your desk, What is the coefficient of friction between the desk and the floor
The third floor of a house is 10.00 m above street level. How much work is required to move a 170kg refrigerator to the third floor.
A heat engine takes in 1000 J of energy at 1000 K and exhausts 615 J at 200 K. What are the actual and maximum theoretical efficiencies of this heat engine
Different values of the energy
A cubical Gaussian surface surrounds two charges, q1 = +3.3 × 10-12 C and q2 = -2.0 × 10-12 C. What is the electric flux passing through the surface
Two long, parallel wires carry currents of 0.245 A in the same direction. If the wires are 0.034 m apart, Is this force attractive or repulsive
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