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ratelena [41]
3 years ago
15

How much heat is required to raise the temperature of 0.25 kg of water from 20°C to 30°C

Physics
1 answer:
pentagon [3]3 years ago
3 0

Answer:

10500 J/kg/*C

Explanation:

Quantity of heat required=mass of substance x specific heat capacity x change in temperature

Quantity of heat required=0.25 x 4200 x [30-20]

Quantity of heat required=0.25 x 4200 x 10

Quantity of heat required=10500 J/kg/*C

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Warm salty water? I’m not 100% sure sorry
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A proton travels through a region of uniform magnetic field at an angle \thetaθ relative to the magnetic field. The magnitude of
MArishka [77]

Answer:

\theta=15.52^{\circ}

Explanation:

The magnitude of the force of a moving cahrge, in our case a proton, trought a magentic field is given by:

F=|q||vB|sin(\theta) (1)

where:

q is the proton charge (q=1.6*10^{-19} C)

v is the proton velocity (v=5*10^{5} m/s)

B is the magnetic field (B = 1.17 T)

Now, we just need to solve the equaton (1) for \theta.

\theta=sin^{-1}\left(\frac{F}{qvB}\right)

But the force F = ma, then:

m is the mass of proton  (m=1.67*10^{-27} kg)

a is the acceleration (a=1.5*10^{13} m/s^{2})

\theta=sin^{-1}\left(\frac{m_{p}a}{q_{p}vB}\right)

\theta=sin^{-1}\left(\frac{1.67*10^{-27}*1.5*10^{13}}{1.6*10^{-19}*5*10^{5}*1.17}\right)

\theta=15.52^{\circ}

I hope it helps you!

7 0
3 years ago
in a paragraph explain how electncity is generated at a power plant. please don't answer if you don't know ​
Anna [14]

Answer:

A turbine spins to generate electricity. There are many ways to spin the turbine by using water, steam, nuclear and so on.

3 0
3 years ago
What is pressure and how it is calculated ?​
Vitek1552 [10]

Answer:

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Explanation:

Pressure and force are related, and so you can calculate one if you know the other by using the physics equation, P = F/A. Because pressure is force divided by area, its meter-kilogram-second (MKS) units are newtons per square meter, or N/m2. If you convert an atmosphere to pounds per square inch, it's about 14.7 psi.

5 0
2 years ago
Newton’s Laws of Motion are absolute in classical physics. One example that uses all three laws simultaneously is the firing of
Debora [2.8K]
I think that by "Classical physics" is meant low speed things. By low speed, I think is meant speed far below very roughly half the speed of light, so that Relativistic, special or general, effects can be ignored. Or at least it is hoped that they can be ignored. 
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I think that the above mostly tcuches on the 3 laws.Any more help needed, please ask.
6 0
2 years ago
Read 2 more answers
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