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ollegr [7]
3 years ago
14

Which object has the most potential energy... ASAP

Physics
1 answer:
lesantik [10]3 years ago
3 0
I think d is the correct answer
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When light passes from air into water at an angle of 60° from the normal, what is the angle of refraction? (40.6°)
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Answer:

40.6°

Explanation:

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3 years ago
A 310-km-long high-voltage transmission line 2.00 cm in diameter carries a steady current of 1,010 A. If the conductor is copper
Marizza181 [45]

Answer:

t = 166 years

Explanation:

In order to calculate the amount of years that electrons take to cross the complete transmission line. You first calculate the drift speed of the electrons by using the following formula:

v_d=\frac{I}{nqA}             (1)

I: current on the wire = 1,010A

n: free charge density = 8.50*10^28 electrons/m^3

A: cross-sectional area of the transmission line = π*r^2

r: radius of the cross-sectional area = 2.00cm = 0.02m

You replace the values of the parameters in the equation (1):

v_d=\frac{1,010A}{(8.50*10^{28}electron/m^3)(1.6*10^{-19}C)(\pi (0.02m)^2)}\\\\v_d=5.9*10^{-5}\frac{m}{s}

Next, you use the following formula:

t=\frac{x}{v_d}                     (2)

x: length of the line transmission = 310km = 310,000m

You replace the values of vd and x in the equation (2):

t=\frac{310,000m}{5.9*10^{-5}m/s}=5.24*10^9s

Finally, you convert the obtained t to seconds

t=5.24*10^9s*\frac{1\ year}{3.156*10^7s}=166.03\ years

The electrons take approximately 166 years to travel trough the complete transmission line

5 0
3 years ago
A net force of 125 N accelerates a 25.0 kg mass. What is the resulting acceleration?
Neko [114]

Answer: a=5 m/s^2

Explanation:

The acceleration of an object can be calculated by using Newton's second law:

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where

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m is the mass of the object

a is its acceleration

In this problem, we have F=125 N and m=25.0 kg, so we can rearrange the equation to calculate the acceleration:

a=\frac{F}{m}=\frac{125 N}{25.0 kg}=5 m/s^2

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Explanation:

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