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Tema [17]
3 years ago
7

If a 375 mL sample of water was cooled from 37.5 C to 0 C how much heat was lost in joules?

Physics
1 answer:
Leviafan [203]3 years ago
3 0
Please, you have to apply the formula below:

<span>Q=c∗m∗Δt

</span><span> where Q is the energy lost,
 
c is the specific heat of water,
 
m is the mass of water involved,

so m=3.75 *10^-1 Kg
 
c=4,184 J/(Kg*°C)

<span>delta t=37.5 °C

I hope my answer has come to your help. God bless and have a nice day ahead!
</span></span>
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Discuss how the motion of the stunt cyclist relates to the forces acting on the stunt cyclist during the collision
ivolga24 [154]

Answer:

hello your question is incomplete hence I will give you a general answer on how a stunt cyclist performs his stunts successfully

answer ;

The stunt cyclist trying to perform some sort of stunt with the bicycle will be faced with some forces like the static fiction between the tires of the bicycle and wall and also a centripetal force.

In order to overcome the centripetal force the minimal grip of the bicycle must be equal to the weight and the speed at which the cyclist must go can be represented as :

V_{min} = \sqrt{\frac{r.g}{u} }

Explanation:

The stunt cyclist trying to perform some sort of stunt with the bicycle will be faced with some forces like the static fiction between the tires of the bicycle and wall and also a centripetal force.

In order to overcome the centripetal force the minimal grip of the bicycle must be equal to the weight and the speed at which the cyclist must go can be represented as :

V_{min} = \sqrt{\frac{r.g}{u} }

where ; r = radius of the tunnel where the stunt is to be performed

            g = gravitational speed

            u = coefficient of static friction

6 0
3 years ago
If an object emits or reflects light, A. it has a smooth surface. B. it can be seen by the eye. C. it must be the color white. D
kirill [66]

Answer:

It can be seen by the eye

Explanation:

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3 years ago
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Oxygen is needed by all cells of most organisms for the release of
pashok25 [27]

Answer:

From the SUN

Explanation:

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7 0
2 years ago
State the formula for calculating power
Alex
Where power<span> P is in watts, voltage V is in volts and current I is in amperes (DC).</span>Power Formula<span> 2 – Mechanical </span>power equation<span>: </span>Power<span> P = E ⁄ t where </span>power<span> P is in watts, </span>Power<span> P = work / time (W ⁄ t). Energy E is in joules, and time t is in seconds.</span>
7 0
3 years ago
1. A 1000 kg bag of sand has an<br> acceleration of 0.5m/s/s. What is the<br> force on the bag?
densk [106]

Answer:

We conclude that the force on the bag is 500 N.

Explanation:

Given

  • Mass m = 1000 kg
  • Acceleration a = 0.5 m/s²

To determine

Force F = ?

We know that when a force is applied to a body, it produces acceleration.

<u>Important Tip: </u>

  • We can determine the force on the bag using the formula F = ma

Using the formula

F = ma

where

  • F is the force
  • m is the mass
  • a is the acceleration

now substitute m = 1000, and a = 0.5 m/s² in the formula

F = ma

F = (1000)(0.5)

F=500 N

Therefore, we conclude that the force on the bag is 500 N.

5 0
3 years ago
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