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The air inside a bicycle tire pump has 151 joules of work done on it as 76.8 joules of heat is conducted away from it. What is the change in internal energy of air?
A 53-kgwoman contestant on a reality television show is at rest at thesouth end of a horizontal 149-kgraft that is floating in crocodile-infested waters. She and theraft are initially at rest. She needs to jump from the raft to aplat form that is ..
Unpolarized light with an intensity of 760 W / m2 is incident on a polarizer with an unknown axis. compute the angle between the axes of the polarizers
The peak current through a capacitor is 8.3mA when connected to an AC source with a peak voltage of 0.80V. What is the capacitive reactance of the capacitor
A 5 kg mass is connected to a spring (1000 N/m) platform which undergoes simple harmonic motion in the vertical direction with two complete oscillations each second. What is the speed of the box at the equilibrium position
The equation of a transverse wave on a string is given by the formula below. Find the linear density of this string in grams per meter
an elastic cord has an unstreched length of 8.1 m and a cross-section of 2 cm2. if the youngs modulus of the material
A bouncy ball is dropped from a heigh h above a floor. If every bounce robs the ball of 6.7% of its kinetic energy just before the bounce, how high will it reach before its eleventh bounce
While moving in, a new homeowner is pushing a box across the floor at a constant velocity. The coefficient of kinetic friction between the box and the floor is 0.41. The pushing force is directed downward, at an angle theta below the horizontal.
A parachutist jumps out of an airplane and acceleratea with gravity to a maximum velocity of 58.8 m/s in 6.o seconds, From what height did the parachutist jump?
A nichrome toaster wire, initially at room temperature, carries 2.72A immediately after it's turned on. After the wire heats, the current drops to 2.44A
In outer space, a constant net force of magnitude 145N is exerted on a 31.4kg probe initially at rest. What acceleration does this force produce
An air-filled parallel-plate capacitor has a capacitance of1pF. The plate separation is then doubled and na waxdielectric is inserted, completely filling the space between theplates. As a result, the capacitance becomes 2 pF. Findthe dielectric const..
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