Questions and answers by

Kareem

Questions (9)

The half-life of carbon-14 is 5730 years. How much of a 50 g sample of carbon-14 is present after 11,460 years?
1. 2 answers
2. 599 views
Suppose that you balance a 5 kg ball on the tip of your finger that has an area of 1 cm2. What is the pressureon your finger?
1. 2 answers
2. 778 views
A rectangular barge floats in freshwater. When a 400 kg block is loaded on the 5 m long by 2 m wide barge,the barge sinks a few
1. 1 answer
2. 847 views
A box of mass 10 kg is pushed across the floor with a force of 25 N. A 2 N frictional force opposes the motion.What is the
1. 2 answers
2. 645 views
A ball is thrown at 22 m/s at 45 degrees to the horizontal. A 5 foot tall fence is located 100 meters away. Doesthe ball make it
1. 1 answer
2. 465 views
A rock thrown horizontally from a bridge hits the water below 30 meters away in the horizontal direction. Ifthe rock was in the
1. 2 answers
2. 688 views
Calculate the force of gravity between Earth (mass = 6.0 * 1024 kg ) and the moon (mass = 7.4 * 1022 kg) the average earth-moon
1. 2 answers
2. 1,099 views
A 70 kg person is riding on a frictionless skateboard at 5 m/s. A friend facing him throws a 5 kg ball toward him at 20 m/s.
1. 1 answer
2. 460 views
A line parallel to one side of a triangle divides one of the other sides into segments of lengths 15 and 9 and divides the third
1. 2 answers
2. 563 views

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