Physics, 30.03.2021 03:30 sierravick123owr441
1pt A cannon fires a 5-kg ball horizontally from a
muzzle that is 1 m above the ground. The
velocity of the ball on leaving the cannon is 700
m/s. At the same time that the cannon is fired,
a soldier drops an identical ball straight down
from a height of 1 m. Neglecting friction and air
resistance, which statement is correct regarding
when the balls strike the ground?
Answers: 1
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Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z
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The mass of the sun is 1.99×1030kg and its distance to the earth is 1.50×1011m. what is the gravitational force of the sun on the earth?
Answers: 3
Physics, 22.06.2019 14:20
Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.
Answers: 1
1pt A cannon fires a 5-kg ball horizontally from a
muzzle that is 1 m above the ground. The
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