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Helga [31]
3 years ago
7

Kinetic energy increases as:

Physics
2 answers:
Akimi4 [234]3 years ago
5 0
C. Both mass and velocity increases
34kurt3 years ago
3 0

Kinetic energy formula is: 1/2 mv^2

M = mass

V = Velocity

So as kinetic energy increases, mass increases and velocity increases because mass and velocity are directly proportional to each other.

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A 50-ω resistor is connected to a 9.0 V battery. How much thermal energy is produced in 7.5 minutes?
Aleksandr-060686 [28]

Answer:

1.2 102j

Explanation:

because it is the most important for me

3 0
3 years ago
Calculate the change in internal energy of the following system: A balloon is cooled by removing 0.659 kJ of heat. It shrinks on
bixtya [17]
<h2>Answer:</h2>

-310J

<h2>Explanation:</h2>

The change in internal energy (ΔE) of a system is the sum of the heat (Q) and work (W) done on or by the system. i.e

ΔE = Q + W       ----------------------(i)

If heat is released by the system, Q is negative. Else it is positive.

If work is done on the system, W is positive. Else it is negative.

<em>In this case, the system is the balloon and;</em>

Q = -0.659kJ = -695J    [Q is negative because heat is removed from the system(balloon)]

W = +385J  [W is positive because work is done on the system (balloon)]

<em>Substitute these values into equation (i) as follows;</em>

ΔE = -695 + 385

ΔE = -310J

Therefore, the change in internal energy is -310J

<em>PS: The negative value indicates that the system(balloon) has lost energy to its surrounding, thereby making the process exothermic.</em>

<em />

<em />

5 0
4 years ago
Gravity and friction are two kinds of<br>a.inertia<br>b.forces<br>c.masses<br>d.gravity
Rashid [163]
The answer is b, gravity and friction are forces.
4 0
3 years ago
Read 2 more answers
The loudness l of a sound, measured in decibels, is given by l=10log10r, where r is the sound's relative intensity. suppose one
marishachu [46]

Answer

given,                              

I is the loudness of sound

I = 10 Log₁₀ r                  

r is relative intensity                    

at when relative intensity is 10⁶        

I = 60 dB                                                  

how much louder when 100 people would be talking together

I = 10 Log₁₀ r                

I = 10 Log₁₀ (10⁶ x 100)  

I = 10 Log₁₀ (10⁸)                

I = 80 dB                      

hence, the intensity will be increased by (80 dB -60 dB) 20 dB when 100 people start talking together.

5 0
4 years ago
Which choice most accurately defines resistance and voltage of a circuit?
devlian [24]

Answer:

c

Explanation:

did the test :)

7 0
3 years ago
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