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A machinist with normal vision has a near point at 25 centimeter. The machinist wears eyeglasses in order to do close work. The power of the lenses is +1.75 diopters. With these eyeglasses, find the near point of the machinist?
A thin sheet of transparent material in air, with refractive index1.54, is illuminated by monochromatic light of wavelength 614nm. Calculate the wavelength of the light in the material.
A rock is thrown horizontally from a tower at point A and hits the ground 3.5 s later at point B. find the magnitude of the initial velocity of the rock
An engineer wishes to determine the specific heat of a new metal alloy. A 0.150-kg sample of the alloy is heated to 540°C. Calculate the specific heat of the alloy
Light of wavelength 550 nanometer falls on a 0.33 millimeter wide slit and forms a diffraction pattern on a screen 1.2 meter away. Determine the position of the first dark band on each side of the central maximum
find the magnitude of the magnetic field midway between two long straight wires 8.80 cm apart when their currents are
Two long bar magnets lying on a table with their south poles facing each other exert a force of 12 N on each other. what is the new value of this force
a helicopter lifts a 74 kg astronaut 18 m vertically from the ocean by means of a cable. the acceleration of the
Evaluate the translational speed of a cylinder when it reaches the foot of an incline 7.20 meter high. Suppose it starts from rest and rolls without slipping
A 300 kg elevator is being pulled upwards by a steel cable at a constant velocity. What is the net force on the elevator
A 798 kg satellite is in a circular orbit about the Earth at a height above the Earth equal to the Earth's mean radius. Find the period of its revolution
A cart that has a mass of 100 kg goes around a vertical loop at a constant speed of 10 m/s. Determine the force that the seat pushes on you with v = 7r at the top of the loop
What is the total charge on Earth's surface implied. explain the strength and direction of an electric field.
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