Physics, 08.04.2020 04:18 maukjackie1974
A child with a weight of 140 N swings on a playground swing attached to 2.10 m long chains. What is the gravitational potential energy (in J) of the child-earth system relative to the child's lowest position at the following times?
a. when the ropes are horizontal
b. when the ropes make a 25.0° angle with the vertical
c. when the child is at the bottom of the circular arc
Answers: 3
Physics, 22.06.2019 05:10
Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.
Answers: 3
Physics, 22.06.2019 10:00
Need people build a dam to create a reservoir that supplies water a nearby city needs. describe two ways this action will likely affect the water cycle in the local environment. (5 points) worth 20 points
Answers: 1
Physics, 22.06.2019 13:20
Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron
Answers: 2
Physics, 22.06.2019 20:30
Your friend increases her force on the desk by 30n . she doesn't change the direction of her push . what happens to the net force on the desk .will the desk accelerate
Answers: 2
A child with a weight of 140 N swings on a playground swing attached to 2.10 m long chains. What is...
Biology, 07.12.2020 19:50
History, 07.12.2020 19:50
Mathematics, 07.12.2020 19:50
Mathematics, 07.12.2020 19:50
Mathematics, 07.12.2020 19:50
Biology, 07.12.2020 19:50
Mathematics, 07.12.2020 19:50