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A uniform horizontalboard, 2.30m long, is in static equilibrium; it is supported 0.50m from its left end, while a vertical force of 21.0N is applied at the right end.
What is the weight of the board?
How much force must be supplied by the support?
A 250 kg weather rocket is loaded with 100kg of fuel and fired straight up. It accelerates upward at 32m/s2 for 34 s, then runs out of fuel. overlook any air resistance effects.
A camera lens has a focal length of 215 mm, How far from the lens should the subject for the photo be if the lens is 21.9 cm from the film
1. suppose a room is divided into the front one fifth the middle two fifths and the back two fifths. what is the ratio
Monochromatic light is incident on a metal surface. The ejected electrons give rise to a current in a circuit. how will the required stopping potential change
Two forces, vector F 1 and vector F 2, act on the 5.00 kg block shown in the drawing. The magnitudes of the forces are F1 = 48.0 N and F2 = 39.0 N. What is the horizontal acceleration (magnitude and direction) of the block?
The position of a jumping cricket is described by the equation: x=10t-4.0t^2 What is the crickets instantaneous velocity at t=0.2 seconds
The Lyman series results from transitions of the electron in hydrogen in which the electron ends at the n=1 energy level. calculate the wavelengths of the photons emitted in the transitions from the energy states
A total charge Q is distributed uniformly throughout a spherical volume of radius R. Let r denote the distance of a point from the center of the sphere of charge. Use Gauss's law to derive an expression for the magnitude of the electric field at a..
The critical angle for the total internal reflection at the liquid air interface is 42.5 degrees. (a) If a ray of light traveling in the liquid has an angle of incidence of 35.0 degrees at the interface, what angle does the refracted ray in the ai..
A string passing over a pulley has a 3.70 kg mass hanging from one end and a 2.60 kg mass hanging from the other end. What is the average frictional torque acting on the pulley
A coil with magnetic dipole moment 1.5 A-m^2 is rotated initally with its magnetic moment parallel to a uniform magnetic field of 0.4T. what is the change in potential energy of the coil
Lawn spheres placed on a pedestals are convex mirrors. Onesphere has the diameter of 37 cm. What is the height of the bird's image
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