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3 years ago

Which statement best describes the difference between ultraviolet light and infrared light

1 answer:

6 0

The infrared (IR) and the ultraviolet(UV) represent the two extremities of the visible spectrum (400-700nm). While IR represents electromagnetic radiation
with wavelengths longer than those of visible light, UV represents wavelengths
shorter than visible light.

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1. a) What is the weight of a 20.0 kg girl on earth?

ki77a [65]

Answer: weight= 196

Explanation:weight= mg

20•9.8= 196

8 0

3 years ago

A solid conducting sphere with radius R = 0.390 m carries a net charge of +0.650 nC.

Tom [10]

Answer:

38.5 N/C

Explanation:

The electric field generated by a charged sphere at a point outside the sphere is equivalent to the electric field generated by a single point charge, and it is given by

$E=k\frac{Q}{r^2}$

where

$k=9\cdot 10^9 Nm^2C^{-2}$ is the Coulomb's constant

Q is the net charge

r is the distance from the centre of the sphere

In this problem, we have

$Q=+0.650 nC=0.65\cdot 10^{-9}C$

$r=0.390 m$

Substituting into the equation, we find

$E=(9\cdot 10^9)\frac{(0.65\cdot 10^{-9}C)}{(0.390m)^2}=38.5 N/C$

6 0

3 years ago

Letter C on the map labels which feature of the Middle East?

likoan [24]

Honest, the map is so tiny, and so fuzzy when I blow it up, I really can't see anything on it clearly. But I think maybe I do see a letter ' C ' in the eastern Mediterranean, with a curved line over to the southern Gaza strip, where it meets Sinai. So I'll say it's the Gaza Strip.

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3 years ago

A charge of +1.4×10^6 coulombs moves from point a to b. What is the potential difference between the two points if the work done

Rama09 [41]

The potential difference between the two points if the work done on the charge is +3.4×10^7 joules would be A. 10volts.

8 0

3 years ago

Compare an Earth year to a cosmic year

sweet-ann [11.9K]

Compared with an Earth year, a galactic year represents time on a grand scale but its not a consistent measurement across the galaxy

4 0

3 years ago