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Andrej [43]
3 years ago
6

Which material is colder in a room where all the objects are in for a long time?

Physics
1 answer:
Ahat [919]3 years ago
3 0
Wooden desk it doesn’t conduct or absorb heat as much as metal or plastic
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What is the magnitude of the electric field at the origin produced by a semi-circular arc of charge = 7.6 μc, twice the charge o
Anna [14]

Orient the semi-circle arc such that it is symmetric with respect to the y-axis. Now, by symmetry, the electric field in the x-direction cancels to zero. So the only thing of interest is the electric field in the y-direction.  


dEy=kp/r^2*sin(a) where k is coulombs constant p is the charge density r is the radius of the arc and a is the angular position of each point on the arc (ranging from 0 to pi. Integrating this renders 2kq/(pi*r^3). Where k is 9*10^9, q is 9.8 uC r is .093 m

I answeared your question can you answear my question pleas

6 0
3 years ago
Jamie decides to drop an egg that has a mass of 345 g off the top of a 8.2 m building. How fast will it be falling right before
zlopas [31]

Answer:

13 m/s

Explanation:

Given:

Δy = 8.2 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: v

v² = v₀² + 2aΔy

v² = (0 m/s)² + 2 (9.8 m/s²) (8.2 m)

v = 12.7 m/s

Rounded to two significant figures, the speed is 13 m/s.

3 0
2 years ago
I have two questions
geniusboy [140]
Current = voltage / resistance = 120 / 24 = 5 Amperes

Voltage = current x resistance = 6 x 10 = 60 Volts
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3 years ago
Which best summarizes a concept related to the work-energy theorem?
Elenna [48]

Answer: When work is positive, the environment does work on an object

Explanation:

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How could you use the barometer to determine the height of a building?
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Take the barometer to the roof of the building. Drop the barometer from the edge of the roof, and, with your wrist watch or a stop watch, measure the time it takes for the barometer to hit the ground or the street below. Then the height of the roof, in meters, is 4.9 times the square of the time in seconds.
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