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Ber [7]
3 years ago
14

A net force of 500 newtons causes

Physics
1 answer:
Nadusha1986 [10]3 years ago
4 0

Answer:

<h3>The answer is option A</h3>

Explanation:

To find the mass of an object given it's acceleration and the force acting on it we use the formula

mass =  \frac{force}{acceleration}  \\

From the question

force = 500 N

acceleration = 5.0 m/s²

We have

mass =  \frac{500}{5}  \\

We have the final answer as

<h3>100 kg</h3>

Hope this helps you

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U-235 releases an average of 2.5 neutrons per fission, while Pu-239 releases an average of 2.7 neutrons per fission. Which of th
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Answer:

Pu - 239 have the smaller critical mass.

Explanation:

Critical mass is the smallest amount of certain element of mass that is needed to achieve a nuclear chain reaction early . Since Pu - 239 releases an average of 2.7 neutrons per fission as compared to U - 235 that releases 2.5 neutrons per fission. So, Pu - 239 has smaller critical mass, because Pu - 239 has a higher probability for fission and produces a large no. of neutrons per fission event. Infact of all the basic nuclear fuels, Pu - 239 has smallest critical mass. Critical mass depends on the nuclear properties of elements undergoing fission reaction. Hence, as Pu - 239 produces large no. of neutrons per fission than U - 235 and Pu - 239 has smaller critical mass.

5 0
3 years ago
A bullet with mass 4.00 g and speed 650.0 m/s is fired at a block of wood with mass 0.0950 kg. The block rests on a "frictionles
7nadin3 [17]

Answer:

26.4 m/s

Explanation:

4 g = 0.004 kg

By the law of momentum conservation, the momentum before and after the impact must be the same

P_{before} = P_{after}

0.004*650 = 0.004*23 + 0.095*v_b

v_b = \frac{2.508}{0.095} = 26.4 m/s

So the speed of the block after the impact is 26.4 m/s

6 0
3 years ago
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A 5 kilogram block is dropped from a height of 3 meters and falls straight to the ground. What is the work done by the force of
vazorg [7]

Answer:

Workdone = 147Nm

Explanation:

Given the following data;

Mass = 5kg

Height = 3m

We know that acceleration due to gravity is 9.8m/s²

First of all, we would find the force applied;

Force = mass * acceleration

Force = 5*9.8

Force = 49N

Now, to find the workdone;

Workdone = force * distance

Substituting into the equation, we have;

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Workdone = 147Nm

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3 years ago
A person is using a rope to lower a 5.0-n bucket into a well with a constant speed of 2.0 m/s. What is the magnitude of the forc
OLga [1]

Answer:

5 N

Explanation:

The bucket is moving at a constant speed of 2m/s Therefore F=ma is 0 N for this to be correct the magnitude of the force exerted by the rope must be equal to the weight of the bucket which is 5 N

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3 years ago
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What's a refractive medium that focuses light to a single point?
ss7ja [257]

Answer:

The convex lens is shaped so that all light rays that enter it parallel to its axis cross one another at a single point on the opposite side of the lens.

Explanation:

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