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natta225 [31]
3 years ago
14

Is cutting a string physcal or chemical change

Physics
1 answer:
oksano4ka [1.4K]3 years ago
6 0
This is a physical change because cutting the string didn't change it chemically, but it did physically.
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Earning Goal: To be able to calculate work done by a constant force directed at different angles relative to displacement
lana [24]

Answer:

the work done by the 30N force is 4156.92 J.

For this problem, they don´t ask you to determine the work of the total force applied in the block. They only want the work done for the force of 30N, with an angle of 30º respectively of the displacement and a traveled distance of 160m. So:

W=F·s·cos(α)=30N·160m·cos(30º)=4156.92J

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3 years ago
_____ is the transfer of thermal energy between two bodies which are at different temperatures. The si unit for this is the joul
ss7ja [257]

Answer:

Heat

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This temperature change that is involved in this process can be measured.

Thus, in thermal energy, heat (heat energy) is transferred from one body to another at different distinct temperatures.

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3 years ago
A car has uniformly accelerated from rest to a speed of 25m/s after traveling 75m. What is its acceleration in m/s^2
Roman55 [17]
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3 years ago
¿Qué ocurre como consecuencia de las corrientes de convección en la astenosfera?
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Answer:

because each row increases in atomic mass by a specific number, so anything over five is in the second row.

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