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A tether ball of mass 0.40 kg is attached to a vertical pole by a cord 1.5 m long. Assume the cord attaches to the center of the ball. The cord makes an angle of 20° with the vertical. (a) What is the tension in the cord? . N (b) What is the speed of the ball? . m/s
A student wants to lose some weight. He knows that rigorous aerobic activity uses about 700 kcal/h (2900 kJ/h) and that it takes about 2000 kcal per day (8400 kJ) just to support necessary biological functions, at what rate will this student "burn"..
Two equal charges of magnitude +1 C are separated by a distance of 1 km. What is the force acting between these two charges
A person of mass 72-kg stands at the center of a rotating merry-go-round platform of radius 2.80 m and moment of inertia 930 kgcdot m^2. The platform rotates without friction with angular velocity 2rad/s. The person walks radially to the edge of t..
An airplane with a speed of 73.2 m/s is climbing upward at an angle of 40° counterclockwise from the positive x axis. Calculate the distance along the ground
Green light (λ = 546 nm) strikes a single slit at normal incidence. What width slit will generate a central maximum that is 3.00 cm wide on a screen 1.76 m from the slit.
A technician wearing a circular metal band on his wrist moves his hand into a uniform magnetic field of magnitude 2.2 T in a time of 0.48 s. find the magnitude of the average emf induced in the band
q1. an electron moves through a uniform magnetic field given by bx 3.00 bx. at a particular instant the electron has
A wave whose wavelength is 0.064 m is traveling down a 732 m long wire whose total mass is 25.7 kg. The wire is under a tension of 2965 N. Determine the velocity of the wave on the wire
The inlet ducting to a jet engine forms a diffuser that steadily decelerates the entering air to zero velocity relative to the engine before the air enters the compressor. determine the temperature, in degrees Celsius, of the air entering the compr..
A wave of amplitude 0.40 m interferes with a second wave of amplitude 0.3 m traveling in the same direction. (a) What is the largest resultant amplitude that can arise.
Blocks of 1.0, 2.0, and 3.0 kg are lined up on a frictionless table with a 12 N force applied to the leftmost block
A capacitor is consists of two short sections of parallel wires in air. One wire is found to be of the voltage of 58 V, What is the capacitance of the two wires
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