Physics, 25.02.2021 22:50 angelaguero536
The position of galaxies in the universe was once hypothesized to be
constant, but evidence gathered by Edwin Hubble indicated that many
galaxies are actually racing away from Earth at high speeds. Which
statement is best supported by this discovery?
A. Science is a body of knowledge that is a subject to change based on data.
B. A hypothesis can become a law.
C. Science is a body of knowledge based on the work of well-known scientists.
D. A hypothesis is the correct answer to a problem.
Answers: 3
Physics, 22.06.2019 05:10
What is the electric force acting between two charges of -0.0045 c and -0.0025 c that are 0.0060 m apart? use fe=kq1q2/r^2 and k = 9.00 x 10^9 n*m^2/c^2 a. 1.7 x 10^7 n b. -1.7 x 10^7 n c. -2.8 x 10^9 n d. 2.8 x 10^9 n
Answers: 1
Physics, 22.06.2019 08:40
Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?
Answers: 1
Physics, 22.06.2019 09:00
In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final
Answers: 1
The position of galaxies in the universe was once hypothesized to be
constant, but evidence gathere...
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