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Snezhnost [94]
3 years ago
6

True or false? An object at rest has an instantaneous acceleration of zero.

Physics
1 answer:
Tpy6a [65]3 years ago
8 0
True. it’s at rest which means it’s not moving so there’s no acceleration
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An unknown material has a mass
atroni [7]

Answer: 1896.55J/kg°C

Explanation:

The quantity of Heat Energy (Q) required to heat a material depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

Thus, Q = MCΦ

Since,

Q = 1320 joules

Mass of material = 5.61kg

C = ? (let unknown value be Z)

Φ = 0.124°C

Then, Q = MCΦ

1320J = 5.61kg x Z x 0.124°C

1320J = 0.696kg°C x Z

Z = (1320J / 0.696kg°C)

Z = 1896.55 J/kg°C

Thus, the specific heat of the material is 1896.55J/kg°C

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A school bus weighing 1000 kg slows down from 15 m/s to a stop. What is the change in kinetic energy?
Mashutka [201]

Answer:

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