Volume of a spherical beach ball
What is the percent uncertainty in the volume of a spherical beach ball whose radius is r = 3.84 0.10 m?
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A 50.0-kg ballet dancer stands on her toes during a performance with four square inches (26.0 cm2) in contact with the floor. What is the pressure exerted by the floor over the area of contact (a) if the dancer is stationary and (b) if the dancer
A ladder 7.05 m long leans against the side of a building. If the ladder is inclined at an angle of 79.5° to the horizontal, what is the horizontal distance from the bottom of the ladder to the building?
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Write the number 2,500,000 light-years in scientific notation. Write the equivalent number of miles in scientific notation. Please show workings.
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A world-class sprinter accelerates to his maximum speed in 3.8 s. He then maintains this speed for the remainder of a 100-m race, finishing with a total time of 10.3 s. What is the runner's average acceleration during the first 3.8 s?
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