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densk [106]
3 years ago
10

How much longer is the bridge on a warm summer day (30.0∘c) than on a cold winter day (−5.00∘c)?

Physics
1 answer:
pashok25 [27]3 years ago
8 0
Check the attached file for the solution.

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An early submersible craft for deep-sea exploration was raised and lowered by a cable from a ship. When the craft was stationary
Assoli18 [71]

Answer:

The tension in the cable when the craft was being lowered to the seafloor is 4700 N.

Explanation:

Given that,

When the craft was stationary, the tension in the cable was 6500 N.

When the craft was lowered or raised at a steady rate, the motion through the water added an 1800 N.

The drag force of 1800 N will act in the upward direction. As it was lowered or raised at a steady rate, so its acceleration is 0. As a result, net force is 0. So,

T + F = W

Here, T is tension

F = 1800 N

W = 6500 N

Tension becomes :

T=W-F\\\\T=6500-1800\\\\T=4700\ N

So, the tension in the cable when the craft was being lowered to the seafloor is 4700 N.

7 0
3 years ago
A car travels 554 miles south in 10.4 hours . what is the velocity of the car ? show all steps
kirill115 [55]

Answer:

<h3>The answer is 53.27 mi/hr</h3>

Explanation:

To find the velocity covered by the car we use the formula

v =  \frac{d}{t}  \\

where

d is the distance

t is the time

From the question

d = 554 miles

t = 10.4 hrs

We have

d =  \frac{554}{10.4}  \\  = 53.2692307...

We have the final answer as

<h3>53.27 mi/hr</h3>

Hope this helps you

4 0
4 years ago
What is the mass of a ball that is moving at 25 m/s and has 93.75 kg*m/s of momentum ?
melisa1 [442]

Answer:

m = 3.75 [kg]

Explanation:

We must remember that momentum is defined as the product of mass by Velocity, therefore it can be represented by means of the following equation.

P=m*v

where:

P = momentum = 93.75 [kg*m/s]

m = mass [kg]

v = velocity = 25 [m/s]

Now replacing, we can clear the mass:

P=m*v\\m=P/v\\m=93.75/25\\m=3.75 [kg]

7 0
3 years ago
Which is a characteristic of atoms?
andriy [413]

Answer: 2

Explanation: bro this is literally basic knowledge

8 0
2 years ago
Is a dog barking an example of kinetic energy to potential energy
Pepsi [2]
It is not an example of kinetic to potential because the dog is already in motion rather then having the potential to do something. Hope this helps!
3 0
2 years ago
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