Physics, 14.11.2019 04:31 aesmithswhs
You and your friend peter are putting new shingles on a roof pitched at 25 degrees. you are sitting on the very top of the roof when peter who is at the edge of the roof directly below you, 5.0m away, asks you for a box of nails. rather than carry the 2.5kg box of nails down to peter, you decide to give the box a push and have it slide down to him. if the coefficient of the kinetic friction between the box and the roof is 0.55, with what speed should you push the box to have it gently come to rest right at the edge of the roof?
Answers: 1
Physics, 21.06.2019 22:40
Explain vector addition, triangle method and parallelogram method
Answers: 1
Physics, 22.06.2019 07:30
Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?
Answers: 1
Physics, 22.06.2019 16:00
What is friction? how does it affect the motion of an object?
Answers: 1
Physics, 22.06.2019 16:30
In the nineteenth century, gregor mendel first determined some basic rules of genetics that have been observed throughout all types of life. no observations have disproved these basic rules of genetics. charles darwin developed the idea of biological evolution around the same time, but he was unaware of mendel’s discoveries in genetics. over a century later, darwin’s idea of evolution was modified in order to incorporate mendel’s rules of genetics along with the other evidence that darwin had used. what is most likely the relationship between mendel’s rules of genetics and darwin’s idea of biological evolution? a.)mendel’s genetics states laws that are now part of the theory of biological evolution.b.)biological evolution states laws that are part of mendel’s theory of genetics.c.)mendel’s genetics replaced darwin’s entire concept of biological evolution.d.)biological evolution is a law that explains why all genetics exist.
Answers: 1
You and your friend peter are putting new shingles on a roof pitched at 25 degrees. you are sitting...
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