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A small rock with mass 0.12 is fastened to a massless string with length 0.80 to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45 with the vertical. Air resistance is negligible. Part A What is the speed of the rock when the string passes through the vertical position? Express your answer using two significant figures. Part B What is the tension in the string when it makes an angle of with the vertical? Express your answer using two significant figures. Part C What is the tension in the string as it passes through the vertical? Express your answer using two significant figures.
Your 85-kg friend (modeled in the picture as a box) is a window-washer and leans a ladder against a large frictionless window. What is the force from the wall on the ladder
Find the position of the object to acquire real, magnified image, inverted, and virtual, upright image.
A man drags a 74.0-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. Find the magnitude of the tension in the strap
A 94 g stone is whirled in a horizontal circle on the end of a 73 cm long string. The stone takes 1.10 s to make each complete revolution. Conclude the angle that the string makes with the horizontal.
2 moles of an ideal gas is allowed to expand from 0.002 m^3 to 0.02 m^3 while the pressure is held at 325000 pascals. Determine the net heat flow in or out of the system
The anomalous Zeeman effect is studied in an advanced student laboratory. A spectral lamp is filled with the vapor of an unknown atom. What is the energy difference between the levels
What is the angular momentum of a 3.2 kg uniform cylindrical grinding wheel of radius 12cm while rotating at 1400 rpm.
Draw a free body diagram of a container of water that you are holding, you walk with the container at a constant speed and then stop abruptly. Draw arrows for the force of gravity, the normal force (your hand pushing up on the container) and the s..
A future space station in orbit about the earth is being powered by an electromagnetic beam from the earth. What are the rms values of the electric and magnetic fields
Calculate momenta before collision of the objects with masses m1=10g and m2=20g, moving with speeds v1=2m/s and v2=7m/s
A single circular loop of wire is placed inside a long solenoid with its plane perpendicular to the axis of the solenoid. What is the induced emf in the small loop
An incandescent lightbulb draws 0.50 A, while a compact fluorescent with the same light output draws 125 mA. How do their energy-consumption rates compare
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