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3 years ago

Control rods in a nuclear reactor are used to:

Physics

2 answers:

kiruha [24]3 years ago

7 0

B.absorb neutrons to prevent chain reactions which become uncontrollable

DedPeter [7]3 years ago

5 0

Control rods in a nuclear reactor are used to absorb neutrons. <em>(B)</em>

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For a particular type of motion, the velocity is zero but the speed is a nonzero quantity. Which statement can you make about th

masha68 [24]

Answer:

because speed is the modulus of velocity which is a vector

the velocity to be zero it must be a round trip

Explanation:

This is because speed is the modulus of velocity which is a vector.

For the velocity to be zero it must be a round trip, therefore the resulting vector zero

On the other hand, the speed of the module is the same in both directions

8 0

3 years ago

the dimensions of a cuboidal block are 2.5 m * 2m * 1.2m its weight 900 n what is the minimum presseure exerted by the block on

aleksandr82 [10.1K]

Answer:

your answer is here 180

Explanation:

900/2.5 * 2 = 180

6 0

2 years ago

Read 2 more answers

A force of 90N is applied to each cart below, which one will accelerate the fastest?

siniylev [52]

Answer:

5kg

Explanation:

The cart with the least amount of mass will result in the fastest acceleration.

5 0

3 years ago

Read 2 more answers

Two objects having masses m1 and m2 are connected to each other as shown in the figure and are released from rest. There is no f

tankabanditka [31]

Answer: $m_1g$

Explanation:

Given

Two masses $m_1$ and $m_2$ is released and there is tension T in the string

Suppose a is the acceleration of the system

Therefore from Diagram

For $m_1$

$T-m_1g=m_1a$

$T=m_1(g+a)$ ------1

for m_2 body

$m_2g-T=m_2a$

$T=m_2(g-a)$ -------2

From above two Equation it is said that Tension is greater than m_1g and less than m_2g

$m_1g$

4 0

3 years ago

Read 2 more answers

While at a construction site, you see a crane lift a 1000kg steel beam up to a height of 10m in a time period of 5.0 seconds. A

storchak [24]

Answer:

Car has more power output than crane

Explanation:

We have given that mass of the crane m = 1000 kg

Height through which crane lift the steel beam h = 10 m

Acceleration due to gravity $g=9.8m/sec^2$

So work done by crane $W=mgh=1000\times 9.8\times 10=98000j$

Time period is given as t = 5 sec

We know that power $P=\frac{W}{t}=\frac{98000}{5}=19600watt$

Now mass of the car = 1000 kg

Initial velocity u = 0 m /sec

Final velocity v = 10 m/sec

We know that work done is equal to the change in kinetic energy

So work done $=\frac{1}{2}mv^2-\frac{1}{2}mu^2$

$=\frac{1}{2}\times 1000\times 10^2-\frac{1}{2}\times 1000\times 0^2=50000j$

Time ids given as t = 2 sec

So power $P=\frac{W}{t}=\frac{50000}{2}=25000watt$

So car has more power output than crane

8 0

3 years ago