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Q1. A 3.10-m-long, 310 kg steel beam extends horizontally from the point where it has been bolted to framework of a new building under construction. A 73.0 kg construction worker stands at the far end of the beam.What is the magnitude of the torque about the point where the beam is bolted into place?
Q2. In the steady state, the current moves straight along the bar, so the net sideways force on a moving charge must be zero. Utilize this fact to establish the drift speed of the mobile charges.
A stationary radar operator determines that a ship is 11.00 km south of him. An hour later the same ship is 24.0 km southeast. If the ship moved at constant speed and always in the same direction, what was its velocity for the duration of this tim..
a snowboarder that weighs 80 kg starts from rest at the top of the hill with a downward slope of 30 degrees from the horizontal. What is the coeffient of kinetic friction
An incompressible fluid flows steadily through a pipe that has a change in diameter. The fluid speed at a location where the pipe diameter is 8 cm is 1.28 m/s. What is the fluid speed at a location where the diameter has narrowed to 4.00 cm.
A telephoto lens with focal length of 123 mm has f-numbers ranging from f/2.8 to f/22. What is the diameter of the lens aperture at the second f-number
A small rubber wheel is used to drive a large pottery wheel, and they are mounted so that their circular edges touch. Calculate the angular acceleration of the pottery wheel
A long wire lying along the x-axis carries a current of 1.60 A in the +x direction. There is the uniform magnetic field present, given by B=0.003i + 0.004j + 0.002k, where i, j, k are the unit vectors along cartesian coordinate axes') in units of Tes..
The loaded cab of an elevator has a mass of 3.6 x 10^3 kg and moves 193m up the shaft in 20s at constant speed. At what average rate does the force from the cable do work on the cab.
Consider a balloon filled with helium gas at room temperature (T = 289 K) and atmospheric pressure. Calculate the average de Broglie wavelength of the helium atoms
A small air-core solenoid has a length of 18 cm and a radius of 0 . 53 cm. The permeability of free space is 1 . 25664 × 10 ? 6 N / A 2 . how many turns per centimeter (whole turns plus fractional turns) are required
A vertical straight wire carrying an upward 21-A current exerts an attractive force per unit length of 8.3×10?4N/m, What is the magnitude of the current in the second wire
question1a diver 60 m deep in 10 celcius fresh water exhales a 0.5-cm-diameter bubble.what is bubbles diameter just as
If a hot air balloon floats at a constant elevation (it has reached equilibrium) where the local atmospheric pressure is 98 kPa (abs) and outside air temperature is 285 K, and the hot air inside the balloon is at 400 K
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