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A small mailbag is released from a helicopter that is descending steadily at 1.50 m/s. After 3.00 s, answer the following questions.
(a) What is the speed of the mailbag in m/s?
(b) How far is it below the helicopter in m?
(c) What are the answers to parts (a) and (b) if the helicopter is rising steadily at 1.50 m/s, in m/s and m respectively?
An outside loudspeaker (considered a small source) emits sound waves with a power output of 125 W. (a) Find the intensity 12.5 m from the source. ______W/m2 (b) Find the intensity level in decibels at that distance.
A 1000 kg boat moves through the water with two forces actingon it. One is a 3000 N forward push by the water on the propellor,and the other is an 2400 N resistive force due to the water aroundthe bow.
A 31.0cm focal length converging lens is 24.0 cm behind adiverging lens. Parallel light strikes the diverging lens. What is the focal length of the diverging lens
A novice skier, starting from rest, slides down a frictionless 33.0° incline whose vertical height is 124 m. Explain how fast is she going when she reaches the bottom?
We will use solar heater as input in steam power cycle for plant. Water initially has temperature of 40 degree, find the Isentropic efficiency of turbine
A 0.100 m long solenoid has a radius of 0.050 m and 1.50 x 10 4 turns. The current in the solenoid changes at a rate of 6.0 A/s. What is the magnetic flux through the small loop
In a He+ ion, the electron is in 3S state Assume that units can be chosen that a = 4 ? ?0 h2 / (M e2) = 1, write down the corresponding wavefunction
A cylinder (I = MR^2/2) is rolling along the ground at 7m/s. It comes to a hill and starts going up. Assume no losses to friction, how high does it get before it stops.
A student wants to lose some weight. He knows that rigorous aerobic activity uses about 700 kcal/h (2900 kJ/h) and that it takes about 2000 kcal per day (8400 kJ) just to support necessary biological functions, at what rate will this student "burn"..
Charge Q = 17E-8 C is placed in the origin. Location A is -3.00m from the charge while location B is 2.00m from the charge. A) Find the potential difference VB - VA between the two points. B) Which point is at the higher potential? Type either "Po..
a spring with a spring constant of 270 nm iscompressed by 14cm.a 880g ball is attached to the end and the spring is
A sphere completely submerged in water is tethered to the bottom by a string. The tension in the string is 1/5 (aka one-fith) the weight of the sphere. What is the density of the sphere
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