How much gravitational potential energy does a 1.0 kg hammer have on a shelf 1.5 m above the ground?

Physics

1 answer:

jok3333 [9.3K]3 years ago

8 0

Answer:

14.7 J

Explanation:

PE=MGH

PE= 1.0 x 9.8 x 1.5 = 14.7 J

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A wire is 1.1 m long and 0.91 mm in cross-sectional area. It carries a current of 4.4 A when a 1.8 V potential difference is app

Vlad [161]

Answer:

The conductivity of the material from which the conductor is made is 2.95 x10⁶ [S. m⁻¹] .

Explanation:

L= 1.1m

S= 0.91 mm²= 9.1 x10⁻⁷ m²

I= 4.4 A

V= 1.8V

$\frac{V}{I} =R\\\\\frac{1.8V}{4.4A} =R= 9/22 ohms$

R=9/22Ω

$R=\frac{L}{σ . S} \\\\Conductivity=sigma=\frac{L}{R.S} \\\\Conductivity= \frac{1.1m}{9/22 ohms . 9.1 E10 (-7) square meters}$

Conductivity=2.95 x10⁶ [S. m⁻¹]

3 0

3 years ago

How far is the sun away from earth

lisabon 2012 [21]

Answer:

The Sun is at an average distance of about 93,000,000 miles (150 million kilometers) away from Earth. It is so far away that light from the Sun, traveling at a speed of 186,000 miles (300,000 kilometers) per second, takes about 8 minutes to reach us.

Explanation:

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3 years ago

Write .00000023 in scientific notation

Vikki [24]

Answer: 2.3 x 10^-7

Explanation:

When you move the decimal to the right, you decrease the exponent. So lets count how many spots you have to move the decimal spot to get an answer between 1 and 10. I counted seven spots.

So:

$2.3 *10^-^7$