3 years ago

A cow’s mass is 410 kg and a car’s mass is 565 kg. What is the difference between their weights?

Physics

1 answer:

solmaris [256]3 years ago

5 0

B. 1520 is the difference between their weights.

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Answer:

A fumbled ball may be recovered and advanced by either team

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2 years ago

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The magnetic dipole moment of Earth has magnitude 8.00 1022 J/T.Assume that this is produced by charges flowing in Earth’s molte

ziro4ka [17]

Answer:

$2.08\cdot 10^9 A$

Explanation:

The magnetic dipole moment of a circular coil with a current is given by

$\mu = IA$

where

I is the current in the coil

$A=\pi r^2$ is the area enclosed by the coil, where

$r$ is the radius of the coil

So the magnetic dipole moment can be rewritten as

$\mu = I\pi r^2$ (1)

Here we can assume that the magnetic dipole moment of Earth is produced by charges flowing in Earth’s molten outer core, so by a current flowing in a circular path of radius

$r=3500 km = 3.5\cdot 10^6 m$

Here we also know that the Earth's magnetic dipole moment is

$\mu = 8.0\cdot 10^{22} J/T$

Therefore, we can re-arrange eq (1) to find the current that the charges produced:

$I=\frac{\mu}{\pi r^2}=\frac{8.00\cdot 10^{22}}{\pi (3.5\cdot 10^6)^2}=2.08\cdot 10^9 A$

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3 years ago

Which two elements have the same number of valence electrons? pls help 50 points

just olya [345]

Answer: All elements in the same group (column) on the periodic table will have the same number of valence electrons.

Explanation:

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2 years ago

A camcorder has a power rating of 13 watts. If the output voltage from its battery is 6 volts, what current does it use?

leva [86]

Power = (voltage) x (current)

13 watts = (6 volts) x (current)

Divide each side by (6 volts):

Current = (13 watts) / (6 volts)

Current = (13/6) Amperes

Current = 2.17 Amperes

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3 years ago

Explain the why a constant speed has a slope of 0 on a graph of speed v.time.

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Because if I do 0*time you get the answer as 0

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