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ValentinkaMS [17]
4 years ago
11

_____ can be reduced but it cannot be eliminated.

Physics
2 answers:
Sonbull [250]4 years ago
3 0
Heat can be reduced but it cannot be eliminated completely there is some amount if heat energy present even if it is absolute zero(-273degrees Celsius)
Grace [21]4 years ago
3 0

Answer:

I am pretty sure its friction

Explanation: Because it is the only thing stopping us freom sliding around the earth.

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PLEEEASE HELP ME!!! YOU GET 15 PTS
Damm [24]

Answer:

b

Explanation:

4 0
3 years ago
A car traveling west in a straight line on a highway decreases its speed from 30.0 meters per second to 23.0 meters per second i
pychu [463]
Acceleration, a =  (v - u) / t

Initial Velocity, u = 30 m/s
Final Velocity, v  =  23 m/s
time                 t  =  2.00 seconds

a = (23 - 30) / 2
a = -7 / 2 = -3.5 m/s2

So the acceleration  is negative, which means it is a deceleration of 3.5 m/s2.
8 0
3 years ago
5. You're examining some of the tiny printing on one of the newer twenty-dollar bills. A 1.5 mm tall letter appears 3 mm tall an
kow [346]

Answer:

80mm or 8cm

Explanation:

According to the lens formula,

1/f = 1/u+1/v

If the object distance u = 4cm = 40mm

Object height = 1.5mm

Image height = 3mm

First, we need to get the image distance (v) using the magnification formula Magnification = image distance/object distance = Image height/object height

v/40=3/1.5

1.5v = 120

v = 120/1.5

v = 80mm

The image distance is 80mm

To get the focal length, we will substitute the image distance and the object distance in the mirror formula to have;

1/f = 1/40+1/-80

Note that the image formed by the lens is an upright image (virtual), therefore the image distance will be negative.

Also the focal length of the converging lens is positive. Our formula will become;

1/f = 1/40-1/80

1/f = 2-1/80

1/f = 1/80

f = 80mm

The focal length of the lens 80mm or 8cm

5 0
4 years ago
Read 2 more answers
a sound with a constant frequency is produced by the siren on top of a firehouse. Compared to the frequency produced by the sire
polet [3.4K]
There's an effect called The Doppler Effect, that's the "up and down" sound.
That frequency is 1.8mm and 115 per minute. 

(Hope this helped.)
3 0
4 years ago
How does the kinetic energy of the particles in a hot cup of coffee compare to the kinetic energy of the particles in ice cream?
trasher [3.6K]

Answer:

it has more molecules than the burning match, which equals MORE total kinetic energy.

Explanation:

4 0
3 years ago
Read 2 more answers
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