Physics, 18.12.2019 04:31 derpmuffin47
Asled of mass m is coasting on the icy surface of a frozen river. while it is passing under a bridge, a package of equal mass m is dropped straight down and lands on the sled (without causing any damage). the sled plus the added load then continue along the original line of motion. how does the kinetic energy of the (sled + load) compare with the original kinetic energy of the sled? a) it is 1/4 the original kinetic energy of the sled. b) it is 1/2 the original kinetic energy of the sled. c) it is 3/4 the original kinetic energy of the sled. d) it is the same as the original kinetic energy of the sled. e) it is twice the original kinetic energy of the sled.
Answers: 3
Physics, 22.06.2019 11:00, Arielledt10
1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?
Answers: 1
Physics, 22.06.2019 11:30, azduce
(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?
Answers: 3
Physics, 22.06.2019 15:00, weridness80
For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat
Answers: 1
Asled of mass m is coasting on the icy surface of a frozen river. while it is passing under a bridge...
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