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The 500-lb crate is hoisted using the ropes AB and AC. Each rope can withstand a maximum tension of 2500 lb before it breaks. If AB always remains horizontal, determine the smallest angle θ to which the crate can be hoisted.
a point particle that has a charge of 18.0 microc is located at x 0 y 0 and a point particle that has a charge q is
A hot-air balloon is rising upward with a constant speed of 2.50m/s. when the balloon is 3.00 m above the ground, How much time elapses before the compass hits the ground
Charge is distributed throughout a spherical volume of radius R with density ρ=αr2, where α is a constant. Find the electric field due to the charge
Find the lowest energy of the system (in eV) and list the quantum numbers of all occupied states if (a) the particles are electrons, and (b) the particles have the same mass of the electron
a meteorologist for a tv station is using radar to determine the distance to a cloud. he notes that a time of 0.28ms
the manufacturer wishes to produce a desktop version of the machine. this requires reducing the size of the drum to a
A nonrefelctive coating (n=1.43) covers the glass (n=1.52) ofa camera lens. Assuming that the coating prevents reflection ofyellow-green light (wavelength in vacuum = 563nm), determine theminimum nonzero thickness that the coating can have.
What impulse was given to the car? What was the change in momentum of the car? If the car speeded up. What was the cars final velocity?
An 8.68-kg block slides with an initial speed of 1.80 m/s down a ramp inclined at an angle of 26.3° with the horizontal. find the distance the block slides before coming to rest
in a newtons-rings experiment a plano-convex glass n 1.52 lens having radius r 4.20 cm is placed on a flat plate as
An object is accelerated by a force. If the acceleration increases by a factor 2 and the mass increases by a factor 4, by what factor was the force increased
The observer on the right, sees two final images. One image comes directly from the objet. The other images comes from the reflection of the object in the mirror. What is the focal length of the concave mirror
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