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A woman stands on a scale in a moving elevator. Her mass is 69.5 kg, and the combined mass of the elevator and scale is an additional 815 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force of 9720 N. What does the scale read during the acceleration?
What is the total work W_fric completed on the block by the force of friction as the block moves a distance 8 rm m up the incline.
A water pipe having a 2.60 cm inside diameter carries water into the basement of a house at a speed of 0.827 m/s, find water pressure (in kPa) at the second floor
A 0.230-kg block along a horizontal track has a speed of 1.50 m/s immediately before colliding with a light spring of force constant 48.2 N/m located at the end of the track. What is the spring's maximum compression
A red blood cell typically carries an excess charge of about -2.5 × 10-12 C distributed uniformly over its surface. What is the surface charge density on the red blood cell
Light bulb 1 operates with a filament temperature of 2400 K, whereas light bulb 2 has a filament temperature of 1600 K. Find the ratio A1/A2 of the filament areas of the bulbs
An electron moving at a speed of vi= 0.960c in the positivex direction collides with another electron at rest, Based only on the original data given in the problem, use conservation of energy to find the speed of the second electron
A large truck collides head-on with a small car. how do the forces acting between the truck and car compare during the collision
A supersonic jet passes directly overhead at an altitude of 11,585 m, traveling at 680 m/s, or mach 2. How much time elapses before you hear the sonic boom
Suppose 47.5 cm of wire is experiencing a magnetic force of 0.7 N. What is the angle in degrees between the wire and the 1.25 T field if it is carrying a 6.5 A current
My home is exactly 5.9 km from Spartan Stadium, where the football team has just scored another touchdown. What is the temperature(in degree Celsius) of the air
A 2 kg block is connected into a spring attached to a wall with spring constant of 12 N/m. How far does the block travel before coming to rest
A system consists of three particles with these masses and velocities: mass 3.2 kg, moving north at 3.0 m/s; mass 3.8 kg, moving south at 4.9 m/s, What is the total momentum of the system
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