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A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.75 of a person's regular weight. Calculate the acceleration of the elevator, and find the direction of acceleration.
A softball pitcher throws a ball straight upward as hard as she can. According to your stopwatch, What is the maximum height reached by the ball
A cube of ice is taken from the freezer at -8.50C and placed in a 95-g aluminum calorimeter filled with 310 g of water at room temperature of 200C
A solenoid of radius 3.5 cm has 800 turns and a length of 25 cm. Find the rate at which current must change through it to produce an emf of 90 mV
A bomb is designed to explode 2.00 s after it is armed. The bomb is launched from earth and accelerated to an unknown final speed. What is the final speed of the bomb just before it explodes
A potato cannon is used to launch a potato on a frozen lake. The mass of the cannon, Mc, is 10.kg, and the mass of the potato, Mp, is 0.850kg. find the direction and the magnitude of the cannon's velocity
The 5400m 1000-500mb thickness contour is often used as a proxy for the rain/snow line throughout much of the country. Calculate the mean virtual temperature of the layer for this thickness value.
q1. a chair of weight 74.0 n lies atop a horizontal floor the floor is not frictionless. you push on the chair with a
U-tube mounted on wood (each arm is about 22 cm long) • Small glass funnel • Thin rubber sheet (5cm by 5cm) • Tall glass container or beaker about 1000 cu.cm capacity • Standard masses, Observe and record the levels of the colored water in arms A ..
THe Voyager one has a 20-W radio transmitter and is expected to transmit to 2025 when it is 25 billion km from the earth. WHat's the Diameter of a dish antenna
An object is placed 20 cm from a concave mirror of radius 19 cm. What is the magnification of the mirror
A child rides a horse in a circular path on a merry-go-round. how far is the horse from the center of the merry-go-round
A car starts from rest at a stop sign. It accelerates at 3.7 m/s^2 for 6.8s , coasts for 2.4s , How far apart are the stop signs
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