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If a person's far point is at 43 cm, what should be the dopter power of corrective eyeglasses? Assume that the eyeglasses are 1.2 cm from the eye.
Velocity and acceleration: consider a velocity vector given in standard unit vector form in rectangular Cartesian coordinates as: v→(t) = (3t4i^ + 7t5/2j^ + 5e2tk^)m/s -What is the acceleration at 2 seconds?
A shopper in a supermarket pushes a loaded cart with a horizontal force of 7 Newton. Find how far will it move in 4.0 second if the shopper places his 30 N kid in the cart before he begins to push it
A 22 {\rm kg} sphere is at the origin and a 12 {\rm kg} sphere is at (x, y) = ( 22 {\rm cm} , 0 {\rm cm}) At what point or points could you place a small mass such that the net gravitational force on it due to the spheres is zero?
The bush baby, a small primate, can leap straight upward to huge heights. The bush baby crouches, and then extends its legs upward for 0.16 meter. Find the acceleration while it is pushing off of the ground
A 0.30 kg mass is suspended on a string. In equilibrium the mass stretches the spring 2.0 cm downward. Calculate the total energy of the system
questiona student standing on a stationary skateboard tosses a textbook with a mass of mb 1.55 kg to friend standing
A 55cm long brass rod has a diameter of 3cm. What compression force will break this rod? What tension force will break this rod
A van der Waals gas undergoes an isothermal expansion from specific volume v1 to specific volume v2. Calculate the change in the specific Helmholtz function for this process.
One mole of an ideal gas initially has a temperature of 52.5°C. If the pressure is held constant and the volume is doubled, what will be the final temperature of the gas
To make ice, a freezer that is a reverse Carnot engine extracts 50 kJ as heat at -15°C during each cycle, with coefficient of performance 5.7. Find how much energy per cycle is delivered as heat to the room
A system with m = 0.026 kg , k = 35 N/m and b = 0.59 kg/s is driven by a harmonically varying force of amplitude 3.6 N. Find the amplitude of the steady-state motion
The small piston of a hydraulic lift has a cross-sectional area of 3.30 cm2, and its large piston has a cross-sectional area of 197 cm2. What downward force of magnitude F1 must be applied to the small piston for the lift to raise a load whose weight..
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