Physics, 29.07.2019 01:30 lerasteidl
Ateacher sets up a stand carrying a convex lens of focal length 15 cm at 20.5 cm mark on the optical bench. she asks the students to suggest the position of the screen on the optical bench so that a distinct image of a distant tree is obtained on it. what should be the correct position of the screen as suggested by the students and why?
Answers: 1
Physics, 21.06.2019 17:30
Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?
Answers: 3
Physics, 22.06.2019 12:00
The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?
Answers: 3
Physics, 22.06.2019 15:30
What is a subatomic particle with a negative charge and very little mass?
Answers: 1
Physics, 23.06.2019 10:30
How many minutes does light need to travel from the sun to jupiter?
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Ateacher sets up a stand carrying a convex lens of focal length 15 cm at 20.5 cm mark on the optical...
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