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sleet_krkn [62]
2 years ago
5

What is the difference between first aid and first aid kit

Physics
1 answer:
Archy [21]2 years ago
7 0

Answer:

One has the word kit and the other doesn't

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A 200 kg crate is pulled along a level surface by an engine. the coefficient of friction between crate and surface is 0.4.
siniylev [52]
Normal force = 200(9.81) = 1962 N
Friction force = 1962 * .4 = 784.8
power = force * distance / time = 784.8 * 5 = 3924 Watts

Watts = Joules / sec
3924 x 180 = 706,320 Joules
4 0
3 years ago
Read 2 more answers
How does something become charged using friction?​
KonstantinChe [14]

<u>Answer:</u>

"Where friction or rubbing results in the transfer of electrons between particles, objects can become negatively or positively charged."

<u>Explanation:</u>

The motion resistance of one moving object with respect to another is called as "Friction". It isn't a basic force, like gravity or electromagnetism. Alternatively, scientists believe it is the product of the electromagnetic attraction in two touching surfaces between charged particles.

The friction have formula:  

Friction force (<em>f </em>)  = coefficient of friction  × normal force (N)

For an instances when one ride a bicycle, an example of rolling friction is the contact between the wheel and the way.

4 0
3 years ago
Complete the sentence to describe conduction, convection, and radiation. Conduction, convection, and radiation are ways by which
Nutka1998 [239]

Explanation :

Conduction : Conduction is the transfer of heat due to collision between the molecules in the substance.

It is the way of energy transferred in the solid.

Convection : When  air is heated and then travels away from the source that means air caries the heat along.

it is called convection.

It is the way of energy transferred in the air and liquid.

Radiation : radiation generate from the emission of electromagnetic wave.

electromagnetic wave carry the energy away from the source which is emitting the radiation.

It is the way of energy transferred in the vacuum.

3 0
3 years ago
Read 2 more answers
A block is placed on an inclined plane with an angle of inclination θ (in degrees) with respect to horizontal. The coefficient o
hjlf

Answer:

The maximum value of θ that will cause the block to remain stationary on the inclined surface is 21.8°

Explanation:

Given;

coefficient of static friction, μ = 0.4

for the block to remain stationary on the inclined plane, force pushing the block upward must be equal to the force acting downwards.

μR = mgsinθ

μmgcosθ = mgsinθ

μcosθ = sinθ

μ = sinθ/cosθ

μ = tanθ

θ = tan⁻¹(0.4) = 21.8°

Therefore, the maximum value of θ that will cause the block to remain stationary on the inclined surface is 21.8°

6 0
3 years ago
The half-life of radium-224 is approximately 3.66 days. Step 1 of 3 : Determine a so that A(t)=A0at describes the amount of radi
Dafna11 [192]

Answer:

a = 0.827468

Explanation:

given,

half life of radium-224 = 3.66 days

now,

 A(t) = A_0 a^t

t is the time

A₀ is the amount at t = 0

at t = 0 ,    A(0) = 1

A(3.66) = 1/2

at t = 3.66

A(t) = A_0 a^t

\dfrac{1}{2}= 1. a^{3.66}

taking log both side

3.66 log (a) = log (0.5)

       log a = -0.0822

now,a = 10^{-0.0822}

         a = 0.827468

4 0
3 years ago
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