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kondor19780726 [428]
3 years ago
6

How much is the earth heating up?

Physics
2 answers:
dolphi86 [110]3 years ago
8 0
Pretty sure it's A. 1.5 degrees
GREYUIT [131]3 years ago
4 0
It's C. 1.7 degrees. With the sun that far away, and plus sun heating earth is nonuniform (Just some extra facts, your welcome.)
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Scouts at a camp shake the rope bridge they have just crossed and observe the wave crests to be 8.00 m apart. If they shake it t
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Answer:

Explanation:

distance between two crests = 8 m

The distance between the two crests is called wavelength.

So, wavelength, λ = 8 m

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Let v be the velocity of wave.

v = f x λ

v = 2 x 8

v = 16 m/s

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The wires in a household lamp cord are typically 3.5 mm apart center to center and carry equal currents in opposite directions.
zhuklara [117]

Explanation:

It is given that,

Distance between wires, d = 3.5 mm = 0.0035 m

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\dfrac{F}{l}=\dfrac{\mu_o I^2}{2\pi r}

Power, P = V × I

I=\dfrac{P}{V}=\dfrac{100}{120}=0.83\ A

This gives, \dfrac{F}{l}=\dfrac{4\pi \times 10^{-7}\times (0.83)^2}{2\pi \times 0.0035}

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\dfrac{F}{l}=3.93\times 10^{-5}\ N/m

(b) Since, the two wires carry equal currents in opposite directions. So, teh force is repulsive.

(c) This force is negligible.

Hence, this is the required solution.

8 0
3 years ago
A crew team rows a boat at a rate of 20 km/h in still water. In practice on a river, the team rows for 30 minutes up the river (
sweet-ann [11.9K]
In the second 30 mins, the speed should be 20 + 1.5 = 21.5 km/h

So S = 21.5 * 30/60 = 10.75 km
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4 years ago
What is the net force on this object?​
Sergio039 [100]
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2 years ago
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