Problem 5: a popular carnival attraction has riders lie on angled cushions while the apparatus spins about the vertical axis like a centrifuge. the 150 lb man lies against the cushion for which the coefficient of static friction is μs = 0.4. if he rotates about the z-axis and lies at an angle of 60° with the horizontal, determine the minimum speed he must spin to avoid sliding off the bottom of the cushion and the maximum speed he must spin to avoid slipping up the top. determine the magnitude of the friction force when the man spins at the average velocity between the minimum and maximum

The receptor cells that convert light energy into neural signals are called

Ball bearings are made by letting spherical drops of molten metal fall inside a talll tower-called a shot tower- and solidify as they fall. a-if a bearing needs 4.0 s to solidify enough for impact, how high must the tower be? b- what is the bearing's impact velocity?

Use the library or internet to research each planet. make a chart comparing the following: approximate surface temperature relative surface gravity compared to earth atmospheric gases water in any form: solid, gas, or liquid when you have completed your chart, use the information you have collected to answer the following questions: which is the hottest planet? which is the coldest planet? which planet's temperature is closest to that of earth? (note: water boils at 100°c/212°f. water freezes at 0°c/32°f) which planet has the greatest gravitational attraction? which planet has the least gravitational attraction? which planet's gravitational pull is closest to that of earth? do any of the planets have oxygen in their atmosphere? which planet's atmosphere most resembles that of earth? do any of the planets have flowing water? which planet's water resources (solid, gas, or liquid) might be close to the amount on earth? which planet most resembles earth in terms of all of the factors: temperature, gravity, atmosphere, and water? if earth became an uninhabitable planet, which planet do you think would be the next best to live on? explain your answer.