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A small metal ball with a mass of 6.19 g and a charge of 6.15 mC is located at a distance of 0.67 m above the ground in an electric field of 11.5 N/C directed to the east. The ball is then released from rest. What is the speed of the ball after it has moved downward a vertical distance of 0.27 m?
A force vector points at an angle of 50.6° above the +x axis. It has a y component of +280 newtons. Calculate the magnitude of the force vector.
A man sits on the south bank of a 100m wide river that flows due east at 2m/s. The man can swim 3m/s, How long will it take him to cross
A 4x 11 swimming pool slopes linearly from a 1.20 depth at one end to a 3.80 depth at the other. What is the mass of water in the pool.
Two sinusoidal waves, identical except for phase, travel in the same direction along a string, producing the net wave y(x,t)=(6.0 mm)sin(24.0x -2.0 s-1 * t+0.320 rad), with x in meters and t in seconds. What is the wavelength ? of the two waves? W..
Heather and Jerry are standing on a bridge 56 above a river. Heather throws a rock straight down with a speed of 15. Jerry, at accurately the same instant of time, throws a rock straight up with the equal speed. Overlook air resistance.
The forklift and operator have a combined weight of 10000 lb and a center of gravity at G. Find the maximum vertical acceleration given to a pipe, and the normal reactions acting on the wheels.
The change in specific enthalpy during the melting of ice at 0 degrees C and 1.01 X 10^5 Pa is ?h= 333.39 kj/kg. find the change in entropy of reservoir and universe
Assume this is the innermost line of interference (m = 0) and that speed of sound in air is 331 m/s, find the (linear) frequency of the sound in Hz.
A dish of hot food has an emissivity of 0.40 and emits 20 W of thermal radiation. If you wrap it in aluminium foil, which has an emissivity of 0.008, how much power would it radiate.
The first player has an acceleration whose magnitude is 0.5 m/s^2 and the second player's has an acceleration of 0.3 m/s^2. Explain by how much time passes before hey collide?
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, How fast are the waves traveling
Two resistors A and B are connected in series to a 9.0 V battery; the voltage across resistor A is 6.0 V. What are the resistances of A and B
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