Physics, 11.06.2021 19:40 victoriagreeneov7l9o
(1 point) A physicist wants to estimate the rate of emissions of alpha particles from a certain source. He counts 400 emissions in 80 seconds. Estimate the rate, in emissions per second and find the uncertainty in this estimate.
Answers: 2
Physics, 21.06.2019 19:10
What happens to light waves from a star as the star moves away from earth?
Answers: 3
Physics, 22.06.2019 04:00
The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane
Answers: 2
Physics, 22.06.2019 04:10
Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward
Answers: 3
Physics, 22.06.2019 09:00
When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.
Answers: 1
(1 point) A physicist wants to estimate the rate of emissions of alpha particles from a certain sour...
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