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Q. A small piece of dust of mass m = 1.5 µg travels through an electric air cleaner in which the electric field is 600 N/C. The electric force on the dust particle is equal to the weight of the particle.
What is the charge on the dust particle?
Q. A jet is circling an airport control tower at a distance of 16.0 km. An observer in the tower watches the jet cross in front of the moon. As seen from the tower, the moon subtends an angle of 9.50x10-3 radians. Find the distance traveled (in meters) by the jet as the observer watches the nose of the jet cross from one side of the moon to the other.
A skier, weighing 453 n, is skiing down a slope that has an incline of 29 degrees above the horizontal. Compute the acceleration of the skier (coefficient of kinetic friction between the skis and snow is 0.21)
The object is authorized to move on a horizontal frictionless surface. The object is released from rest when the spring is compressed 0.15 m. Find out the force on the object.
What's the advantage of launching space vehicles from high flying aircraft in place of from the ground.
A particular nucleus of the element plutonium contains 94 protons and 150 neutrons. What is the magnitude of the force from the nucleus on a single electron that is at a distance of 0.563 × 10-12 m from the plutonium nucleus.
A mass of 1.60 kg stretches a vertical spring 0.335 m. If the spring is stretched an additional 0.164 m and released, how long does it take to reach the (new) equilibrium position again.
Two boxes A and B are connected to each end of a light vertical rope. A constant upward force 80.0 is applied to box. Starting from rest, box descends 10.4 in 3.40. The tension in the rope connecting the two boxes is 37.0
A cardiac pacemaker can be affected by the static magnetic field as small as 1.7 mT. How close can a pacemaker wearer come to a long, straight wire carrying 19 A.
Charges q and Q are placed on the x axis at x = 0 and x = 2.0 m, respectively. If q = -40 pC and Q = +30 pC, define the net flux through a spherical surface (radius = 1.0 m) centered on the origin.
A 4.00-kg model rocket is launched, expelling 54.9 g of burned fuel from its exhaust at a speed of 690 m/s. What is the velocity of the rocket after fuel has burned.
Define proton-proton chain efficiently
A dolphin in seawater at a temperature of 25 °C makes a chirp. How much time passes before it hears an echo from the bottom of the ocean, 208 m below.
What is the value of g at the location of this satellite. Discover the altitude of the satellite in meters.
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