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A 150-N crate is being pulled up a perfectly smooth ramp that slopes upward at 15° by a pull that is directed at 30° above the surface of the ramp. What is the magnitude of the pull required to make the crate move up the ramp at a constant velocity of 1.75 m/s?
Detect burglars entering windows: Describe how you will design a device that uses electromagnetic induction to detect a burglar opening a window in your ground floor apartment. Include drawings and a word description.
A thin sheet of transparent material has an index of refraction of 1.80 and is 24.0 µm thick. how many fringe shifts occur in the pattern
Transverse waves with a speed of 59.0 m/s are to be produced on a stretched string. A 4.95-m length of string with a total mass of 0.0600 kg is used. Calculate the wave speed in the string
q. 1. what physical quantities can be represented by vectors? why? how do you determine the resultant force of the
A 74 trampoline artist jumps vertically upward from the top of a platform with a speed of 5.0 m/s. How can I find how much he depresses it if there is a spring constant of 6.2*10^4.
In what part of the EM spectrum would a photon of energy 9.5 x10-25J be found? What is its energy in electron volts?
What is the temperature at point B?What is the work done BY the gas in the transition A to B? What is the efficiency of a Carnot cycle running between the lowest and highest temperature of the cycle above
A 1.0kg grindstone in the shape of a uniform cylinder of radius 0.25m acquires a rotational rate of 18 rev/s from rest over a 6.4s interval at constant angular acceleration. Calculate the torque delivered by the motor
If the mass of both weights is 150 gm, the first mass is located 30 north of east, the second mass is located 30 south of east, and the transducer sensitivity is 0.5 volts/Newton, how large a voltage do you expect to measure? Suppose the transducer h..
A 116 g insulated aluminum cup at 15°C is filled with 140 g of water at 50°C. After a few minutes, equilibrium is reached. Estimate the total change in entropy
A charge of 20 nC is uniformly distributed along a straight rod of length 4.0 m that is bent into a circular arc with a radius of 2.0 m
A projectile of mass m is launched from the origin at speedv0 and angle theta. It is attached to the origin with aspring (spring constant k) and equilibrium length zero. Show the equations of motion and solve for x(t) and y(t).
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