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Ivanshal [37]
3 years ago
8

A railroad car is pulled through the distance of 960 m by a train that did 578 kJ of work during this pull.

Physics
1 answer:
Wittaler [7]3 years ago
7 0

Answer:

<h2>602.08 N</h2>

Explanation:

The force supplied by the train can be found by using the formula

f =   \frac{w}{d}  \\

w is the workdone

d is the distance

From the question we have

f =  \frac{578000}{960}  \\  = 602.083333...

We have the final answer as

<h3>602.08 N</h3>

Hope this helps you

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Answer:

Electric force, F=2.24\times 10^{-14}\ N

Explanation:

It is given that,

Charge on an electron is -1.6\times 10^{-19}\ C

Electric field, E=1.4\times 10^5\ N/m

We need to find the magnitude of the electric force on this electron due to this field. The electric force is given by :

F=qE\\\\F=1.6\times 10^{-19}\times 1.4\times 10^5\\\\F=2.24\times 10^{-14}\ N

So, the electric force is 2.24\times 10^{-14}\ N.

6 0
2 years ago
A body of mass 5.0 kg is suspended by a spring which stretches 10 cm when the mass is attached. It is then displaced downward an
Dominik [7]

Answer:

position as a function of time is y = 0.05 × cos(9.9)t

Explanation:

given data

mass = 5 kg

length = 10 cm = 0.1 m

displaced = 5 cm

to find out

position as a function of time

solution

we will apply here equilibrium that is

mass × g = k × length

put here value and find k

k = \frac{5*9.8}{.01}

k = 490 N/m

and ω is

ω = \sqrt{\frac{k}{m} }

ω = \sqrt{\frac{490}{5} }

ω = 9.9

so here position w.r.t  time is

y = 0.05 × cosωt

y = 0.05 × cos(9.9)t

so position as a function of time is y = 0.05 × cos(9.9)t

8 0
3 years ago
Which from radiation from the electromagnetic spectrum is MOST LIKELY to cause mutations in growing tissues, and should be MOST
Novay_Z [31]

Answer:

gamma rays

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because they have the highest in energy there fore it can cause some major  damage

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2 years ago
When you look at the light from distant stars you are really looking back in time explain what this means
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Answer: Stars are in space for very long time, much longer than that one night. You are looking back in time because those stars have been there for so long that it’s like looking back in time, to when those stars were there.

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5 0
2 years ago
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The force of repulsion between two like–charged table tennis balls is 8.2 × 10-7 newtons. If the charge on the two objects is 6.
Allisa [31]

solution

In This question we have given ,

Charge on each ball=q=6.7\times 10^{-9} C

force of repulsion between balls is F=8.2\times 10^{-7}N

Let distance between ball be x

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F=\frac{k\times q_{1}q_{2}}{x^2}..............(1)

here,k = 9.0\times 10^9 Nm^2C^{-2}

Put values of k and charges in equation 1

8.2\times 10^{-7}N=\frac{9.0\times 10^9 Nm^2C^{-2}\times 6.7^2\times 10^{-18} C^2}{x^2}

8.2\times 10^{-7}N\times x^2=9.0\times 10^9 Nm^2C^{-2}\times 6.7^2\times 10^{-18} C^2}

x^2=\frac{9.0\times 10^9 Nm^2C^{-2}\times 6.7^2\times 10^{-18} C^2}{8.2\times 10^{-7}N}

x=\frac{3\times 6.7}{\sqrt{820} }m

x=.701m

therefore distance between two given charges is =.701m

7 0
3 years ago
Read 2 more answers
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