Tuesday
December 10, 2013

# Posts by becky

Total # Posts: 470

math
The weights of adult long-tongued fruit bats are known to be normally distributed with a mean of 20.22 grams and a standard deviation of 3.23 grams. What is the probability that a randomly selected bat will: a) weigh at most 15 grams? b) weigh less than 30 grams?

Physics
wow I thought this was a homework help site. Not a be rude to someone you don't even know site? I have read the book thanks but physics is a hard topic to understand. You wasted your own time by commenting that rude comment. Thanks bye x

Physics
Tim and Ray have the same mass and they both climb up the same hill. Tim climbs the hill in 12 minutes and Ray in 22 minutes. a) Who does more work? b) Who develops the most power?

Physics
A blue whale materializes 11.5 km above an airless planet with an acceleration of gravity of 6.85 m/s2. What is the speed of the whale right before impact? (Work-Energy Theorem)

Physics
A car is driven at a constant speed of 85 km/h down a road. The car's engine delivers 49.2 kW of power. Calculate the average force that is resisting the motion of the car.

Physics
Michelle pulls a 14.5 kg wheeled cart with a rope along a flat road. The rope makes a 28.0 degree angle with the horizontal. If the tension in the rope is 350 N and she pulls the cart 56.7m how much work does Michelle do?

Physics
Bryant is fired from a cannon with an initial speed of 14 m/s. If his mass is 80 kg what is his initial kinetic energy?

Physics
A ball is moving at 82 m/s when it hits a ball at rest which has a mass fours times as big as its own. The formally stationary ball leaves the collision with a speed of 7.5 m/s what is the final velocity of the first ball?

physics
Neona is on a tricycle A, combined mass 62 kg, and Alyssia is on tricycle B, combined mass 54 kg. They are initially at rest, but they push off of each other. What is Neona's speed immediately after the push if Alyssia's is 4.2 m/s?

Physics
Kenya finally loses her cool and punches her teacher. The teacher weighs 85 kg. He sees the punch coming and begins to back up at a speed of 0.60 m/s. After Kenya clocks him, he is moving backwards at a speed of 0.82 m/s. If the contact time of Kenya's fist to the teachers...

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