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Assoli18 [71]
3 years ago
13

Help me please, help me

Physics
2 answers:
Elenna [48]3 years ago
6 0
Yea what they saidekbekenekef
kolbaska11 [484]3 years ago
4 0

<u>for the question w the coffee cup and the dishwasher: </u>19,536.72 J

<u>for the question w the 3 pots of boiling water:</u> They all have the same temperature

<u>for the question w the copper: </u>103.84 Celsius

(Not sure what the other 2 pictures are about but good luck)

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Masja [62]
The Ampere (A). You could literally google to be more efficient, all the same to me tho
4 0
3 years ago
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How long would it take for a rock falling 97.2 m/s to reach the ground from 100 meters
mote1985 [20]

Answer;

velocity(v) = 97.2 m/s ,

distance (S) = 100 m

determine time(t) = ?

  We know that,

               distance (S) = velocity(v) × time(t)

           So,      time (t) = distance ÷ velocity

                                   = 100 ÷ 97.2

                              <em>   t = 1.02 sec.</em>

<em>I hope this will help you.</em>

5 0
4 years ago
A car bounces up and down on its springs at 1.0 Hz with only the driver in the car. Now the driver is joined by four friends. Th
romanna [79]

The new frequency of oscillation when the car bounces on its springs is 0.447 Hz

<h3>Frequency of oscillation of spring</h3>

The frequency of oscillation of the spring is given by f = (1/2π)√(k/m) where

  • k = spring constant and
  • m = mass on spring

Now since k is constant, and f ∝ 1/√m.

So, we have f₂/f₁ = √(m₁/m₂) where

  • f₁ = initial frequency of spring = 1.0 Hz,
  • m₁ = mass of driver,
  • f₂ = final frequency of spring and
  • m₂ = mass on spring when driver is joined by 4 friends = 5m₁

So, making f₂ subject of the formula, we have

f₂ = [√(m₁/m₂)]f₁

Substituting the values of the variables into the equation, we have

f₂ = [√(m₁/m₂)]f₁

f₂ = [√(m₁/5m₁)]1.0 Hz

f₂ = [√(1/5)]1.0 Hz

f₂ = 1.0 Hz/√5

f₂ = 1.0 Hz/2.236

f₂ = 0.447 Hz

So, the new frequency of oscillation when the car bounces on its springs is 0.447 Hz

Learn more about frequency of oscillation of spring here:

brainly.com/question/15318845

7 0
2 years ago
A woman standing on the ground sees a rocket ship move past her at 95% the speed of light. Compared to the rocket at rest, the w
Rufina [12.5K]

As per Einstein's theory of relativity we know that when an object will move with the speed comparable to the speed of light then the length of the object will be different from its length at rest position

This is also known as length contraction theory

As we know here that

L = L_0\sqrt{1 - \frac{v^2}{c^2}}

so here we know that

v = 0.95 c

so from above equation we will have

L = L_0\sqrt{1 - 0.95^2}

L = 0.31 L_0

so here the length will be SHORTER

8 0
3 years ago
What type of rays would you expect to be used frequently at a hospital to make medical diagnoses?
Bess [88]
X rays because to see your bones
7 0
4 years ago
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