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49 J of work is needed to stretch a spring from 1.4 m to 2.9 m from equilibrium. What is the value of the spring constant?
the weight of a star is usually balanced by two forces the gravitational force acting inward and the force created by
A 70.0 kilogram man throws a 0.0420 kilogram snowball forward with a ground speed of 34.0 m/s. Determine the velocities of the two people after the snowball is exchanged
A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9 x 10^7 m. What would be the magnitude of the gravitational force exerted on the satellite by the planet if the radius of the orbit were increased to 3.6 x 10^7..
A helicopter is ascending vertically with a speed of 5.73m/s . At a height of 114m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: The package's initial speed equals the hel..
Express in terms of g, R and in. the angular acceleration of the pulley, the rate at which A accelerates and the tension on the string.
A 400 cm rope under a tension of 90 N is set into oscillation. The mass density of the rope is 170 g/cm. What is the frequency of the first harmonic mode (m = 2)?
Two stones are thrown simultaneously, one straight upward from the base of a cliff, Find the location (above the base of the cliff) of the point where the stones cross paths
An airplane pilot is over a town that is 59 km due north of the starting point. What is the speed of the airplane relative to the air
Three blocks are arranged in a stack on a frictionless horizontal surface. The bottom block has a mass of 37.0 kg. What is the magnitude of the normal force exerted by the bottom block on the middle block
A capacitor with capacitance C = 4.10·10^-6 F is connected to an AC power source having a peak value of 6.0 V and f = 130 Hz. Find the reactance of the capacitor. Calculate the maximum current in the circuit.
Starting from rest, a basketball rolls from the top of a hill to the bottom, reaching a translational speed of 6.6 m/s. Ignore fritional losses. What is the height of the hill
In Figure 3, where V23 = 3.00V1, n moles of a diatomic ideal gas are taken through the cycle with the molecules rotating but not oscillating (CV =5R/2 ). Calculate the heat Q12 for process 1→2.
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