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If the Moon were less massive and/or further away, then the gravitational force of the Moon on the oceans would diminish. What positive effects do the tides have for supporting life on Earth?
A dentist's drill starts from rest. After 2.70 s of constant angular acceleration it turns at a rate of 2.4 104 rev/min. Find the drills angular acceleration
raindrops are falling straight downward.when observed from a car traveling at 55mihthe drops strike the side window at
Light from an argon laser strikes a diffraction grating that has 5320 grooves per centimetre. The central and first-order principal maxima are separated with 0.488 m on a wall 1.88 m from the grating. Decide the wavelength of the laser light.
A 1000 kg weather rocket is launched straight up. The rocket motor provides a constant acceleration for 16 s, What is the rocket's speed as it passes through acloud 6200 m above the ground
At a right angle to a magnetic field. The acceleration of gravity is 9.81 m/s2. What is strength of the magnetic field necessary to exactly balance the weight of the proton and keep it moving horizontally.
When an object falls freely under the influence of gravity there is a net force mg exerted on it by the Earth
q1. a 2.47 kg steel ball strikes a massive wall at 11.7 ms at an angle of alpha 67.2deg with the plane of the wall. it
A stainless steel orthodontic wire is applied to a tooth, as shown in the figure above. The wire has an unstretched length of 2.7 cm and a diameter of 0.2 mm. What is the tension in the wire
a tennis ball of mass 0.060 kg is served. It strikes the ground with a velocity of 54m/s ( 120 mi/h) at an angle of 22 degree below the horizontal. what average force did the ground exert on the ball
In a Compton scattering experiment, an x-ray photon scatters through an angle of 21.0° from a free electron that is initially at rest. The electron recoils with a speed of 2,520 km/s.
At each corner of a square of side there are point charges of magnitude Q, 2Q, 3Q, and 4Q. Determine the magnitude of the force on the charge
Three identical 6.0-kg cubes are placed on a horizontal frictionless surface in contact with one another. What is the magnitude of the force exerted on the middle cube
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