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a circular roller coaster has radius 30 m. The speed at the bottom is 37.0 m/s. A 50 kg girl is sitting on a scale. What does the scale read in kilograms at the bottom of the ride? What does it read in kilograms at the top of the ride?
What is Newtons Version of Keplers Third Law
What is walking speed if the speed drops. after an exciting but exhausting lecture, a physic lecture stretch out for a nap on a bed of nails, suffering no injury and only moderate discomfort. how is this possible.
A quantity of ideal gas at 10.0°C and 100 kPa occupies a volume of 1.20 m3. how much volume does the gas occupy
A square metal sheet 3.3 cm on a side and of negligible thickness is attached to a balance and inserted into a container of fluid. What is the surface tension of the fluid
The primary of a step-down transformer has 290 turns and is connected to a 120 V rms line. The secondary is to supply 17 A at 7 V. Find the number of turns in the secondary, assuming 100% efficiency
A beam of light crosses the interface between two media with an angle of incidence of 34.0° and an angle of refraction of 24.6°. What is the index of refraction of the first medium
find out the magnitude of the gravitational force exerted by one mass.
A railroad car of mass 2.4 104 kg moving at 4.00 m/s collides and couples with two coupled railroad cars, How much kinetic energy is lost in the collision
A 55.6-kg ice skater is moving at 4.00 m/s when she grabs the loose end of a rope, Determine the force exerted by the horizontal rope on her arms
Practical steam engines utilize 450°C steam, which is later exhausted at 250°C. What is the overall efficiency of the two engines
Find the critical angle of incidence for a ray of light going from a diamond to air
Scientists in a laboratory produce a sound wave in a simulated environment (air) with a velocity of 473 m/s
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