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1. A constant net torque is applied to a object. Which one of the following will not be constant?
1. Angular acceleration
2. Angular velocity
3. Moment on inertia
4. Centre of gravity
2. Using a screwdriver, you try to remove a screw from a piece of furniture, but you can't get it to turn. To increase the chances of success, you must use a screwdriver that
1. Is longer
2. Is shorter
3. Has a narrower handle, or
4. Has a wider handle
estimate how many books can be shelved in a college library with 3500 of floor space. assume 5 shelves high having
Consider a system of two bound particles (e.g., two nucleons bound by the weak force), of spins S1, S2, with s1 = s2 = 1/2. In an external magnetic field, the interaction Hamiltonian is H = µB · S, with S = (S1 + S2). A random distribution (contai..
the two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm red and 486 nm blue.
The weight of the atmosphere above 1 m^2 of Earth's surface is about 100,000 N. Density of course, become less with altitude. But suppose the density of air were a constant 1.2 kg/m^3. Calculate where the top of the atmosphere would be.
A 0.900-V potential difference is maintained across a 1.50-m length of tungsten wire that has a cross-sectional area of 0.400 mm2. What is the current in the wire
A 450g rubber ball is dropped from 2.0m above the floor. After the bounce, the ball only rises to a height of 1.5m above the floor. find the amount of heat generated when the ball hits the floor
Determine the first three normal-mode frequencies for a pipe of length L that is closed at both ends. Use the results of part A to estimate the normal-mode frequencies of a shower stall. (Assume that a shower has a length of 1.42{\rm m} ).
A meterstick of negligible mass has a 0.25 kg mass at its 31 cm mark and a 0.40 kg mass at the 77 cm mark. Where should the fulcrum be so the meterstick is balanced
In an old-fashioned amusement park ride, passengers stand inside a 5.1--diameter hollow steel cylinder with their backs against the wall. What is the minimum angular speed
if an electron is confined to a region of size 35.2 nm, what is the minimum possible uncertainty in its momentum
In 1986 a gargantuan iceberg broke away from the Ross Ice Shelf in Antarctica. It was approximately a rectangle 160 km long, What is the mass of this iceberg, given that the density of ice is 917 kg/m3
You hold a 23.5-kg car tire in your hand and, standing in place, rotate the tire in a horizontal circle of radius r = 1.10 m starting from rest. What is the time required to complete three full revolutions
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