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Annette [7]
3 years ago
5

A 2.2kg block of ice slides across a rough floor. Its initial velocity is 2.5m/s and its final velocity is 0.50m/s. How much of

the ice block melted as a result of the work done by friction? (Latent Heat of water is 3.3*10^5J/kg)
Physics
1 answer:
kirill [66]3 years ago
7 0

Answer:A 2.2kg block of ice slides across a rough floor. Its initial velocity is 2.5m/s and its final velocity is 0.50m/s. How much of the ice block melted as a result of the work done by friction? (Latent Heat of water is 3.3*10^5J/kg)

Explanation:

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The charged particles in the beams that Thomson studied came from atoms. As these particles moved away from their original atoms
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The question to the above information is;

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3 years ago
Read 2 more answers
2. How far will a bird have traveled in 13 seconds if it maintained a speed of 31 m/s?
Flura [38]

#2

speed of bird = 31 m/s

time = 13 s

since here bird maintains its speed to be constant

so here the distance traveled is given by

d = v*t

d = 31 * 13

d = 403 m

so bird will travel 403 m distance while maintaining its speed to be constant

#3

average speed is the ratio of total distance covered and total time

here Ian walk 2 km then 0.5 km and then 2.5 km so the total distance is given as

d = d_1 + d_2 + d_3

d = 2 + 0.5 + 2.5

d = 5 km

total time of his full motion is

t = 3 hours

so the average speed of the motion is

v = \frac{d}{t}

v = \frac{5}{3} = 1.67 km/h

so here average speed of Ian is 1.67 km/h

#4

Initial speed of the truck is 6 m/s

after 4 s interval of time

final speed of the truck is 14 m/s

so the acceleration is rate of change in velocity

so it is given as

a = \frac{v_f - v_i}{t}

a = \frac{14 - 6}{4}

a = 2 m/s^2

so here truck accelerated with 2 m/s^2

#5

Here car starts from rest so its initial speed is 0

after 2.5 s interval of time

final speed of the car is 15 m/s

so the acceleration is rate of change in velocity

so it is given as

a = \frac{v_f - v_i}{t}

a = \frac{15 - 0}{2.5}

a = 6 m/s^2

so here car accelerated with 6 m/s^2

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a bag full of trash is dropped from the balcony

Here we can say when bag is in air

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F = ma

mg = ma

a = g = 9.8 m/s^2

so here bag will have constant acceleration during its whole motion as we can see that there is no change in the force and hence its acceleration always remains constant

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It would be autotroph and hetrotroph
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