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Question: An object moves at a constant velocity of 11 m/s to the southwest for an inverval of 20 s. Halfway through this interval, what is the magnitude of its instantaneous velocity?
Suppose a cube of aluminum which is 1.00 cm on a side accumulates a net charge of +3.10 pC. (a) What percentage of the electrons originally in the cube was removed.
It has been found that, on average, galaxies are moving away from Earth at a speed that is proportional to their distance from Earth. What is the expected recessional speed of a galaxy 4.80 1022 m from Earth
A student decides to measure the muzzle velocity of a pelletshot from his gun. He points the gun horizontally. what is the initial speed of the pellet
To reach a picnic basket, an ant walks from his hill located at 6.00m, 50.0 degress north of east to the basket located at 8.00m 24.0 degress south of east
A worker is to paint the walls of a square room 8.00 fthigh and 12.0 ft along each side. What surface area in squaremeters must she cover
A student m = 81 kg runs at a velocity vi = 2.25 m/s before jumping on a skateboard. After jumping on the board the student has a velocity vf = 1.75 m/s. What is the mass of the skateboard in kg
Consider a model thermodynamic system in which the allowed (nondegeerate) energy levels are 0, E, 2E, 3E. Compute the average occupation numbers for each energy level
A tube of radius 5 cm is connected to tube of radius 1 cm as shown above. Water is forced through the tube at a rate of 10 liters/min. What is the velocity of the water in the 5 cm radius tube
A truck of mass 10012 kg moving at a speed of 63.2 mph has lost its brakes. How far along the incline (?x) does the truck travel before it stops
An object having a net charge of 24μC is placed in a uniform electric field of 610 N/C directed vertically. What is the mass of the object if it floats?
Three negative charges of equal magnitudes are positioned along the x-axis at x = -a, x=0, and x = +a respectively. The charge located at x=0 is moved away along the y-axis to a position (x,y) = (0, +a). How does the potential energy of the system..
The angular speed of an automobile engine isincreased at a constant rate from 1500rev/min to 2500 rev/min in13 s. How many revolutions does the engine make during this13 s interval
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