Physics, 23.10.2019 03:50 tsedeneyaalemu2924
Achild slides down a snow-covered slope on a sled. at the top of the hill, her mother gives her a push to start her off with a speed of 1.00 m/s . the frictional force acting on the sled is one-fifth of the combined weight of the child and the sled. if she travels for a distance of 25.0 m and her speed at the bottom is 4.00 m/s , calculate the angle that the hill makes with the horizontal.
Answers: 2
Physics, 22.06.2019 09:30
Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?
Answers: 1
Physics, 22.06.2019 18:00
Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.
Answers: 1
Physics, 22.06.2019 22:20
The starship enterprise is caught in a time warp and spock is forced to use the primitive techniques of the 20th century to determine the specific heat capacity of an unknown mineral. the 125-g sample was heated to 96.3°c and placed into a calorimeter containing 85.9 g of water at 20.0°c. the heat capacity of the calorimeter was 14.2 j/k. the final temperature in the calorimeter was 24.5°c. what is the specific heat capacity (in j/g°c) of the mineral? enter to 4 decimal places.
Answers: 1
Achild slides down a snow-covered slope on a sled. at the top of the hill, her mother gives her a pu...
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