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A 4.5 kg block supported by a string rests on a frictionless incline. The length of the string is 0.2 m and its mass of 3.8 g ? 4.5 kg. Find the time it takes a transverse wave to travel from one end of the string to the other. The acceleration of gravity is 9.8 m/s 2. Answer in units of ms. 41 degree angle.
The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration of -5.70 m/s2 for 4.40 s, With what speed does the car then strike the tree
The rms output voltage of an AC source is 250 Volt and the operating frequency is 80 Hertz. Determine the equation giving the output voltage as a function of time t
question a 150 ohm combination of resistors draws 2 ma of current when connected across a battery. if you now add a 1
question sphere 1 with radius r1 has positive charge q. sphere 2 with radius 2.00 r1 is far from sphere 1 and initially
The armature of a simple ac generator has 30 circular loops of wire, each with a radius of 10 cm. What is the maximum emf induced in the loops
the ground state of ne-17 is unstable. its half-life has been measured to be 109 ms. a what is the energy width of the
A projectile is red from level ground at an angle of 30 degree above the horizon. It hits the ground at t = 4 s. What is the magnitude of the initial velocity, v?
Romeo and Juliet want to elope. It is a cold Italian day with ice on the ground. the coefficient of static friction between the ladder and the ice is .15. what's the maximum that Juliet can weigh
Suppose current is flowing in a wire from right to left. Which way do the electrons in the wire move? If three identical bulbs are connected in series across a 12V battery, the voltage across each bulb will be?
A 45.0 kilogram boy, riding a 2.10 kilogram skateboard at a velocity of 5.60 m/s across a level sidewalk, jumps forward to leap over a wall. Find the skateboard's velocity relative to the sidewalk at this instant
Heat engines take input energy in the form of heat, use some of that energy to do work, and exhaust the remainder. Determine the magnitude of the heat the athlete gives off
Consider a Van de Graaff generator with a 30.0 cm diameter dome operating in dry air. what is the maximum potential energy of the dome
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