3 years ago

Can someone help me with PE questions

Physics

2 answers:

skelet666 [1.2K]3 years ago

6 0

1. What does PE stand for? Physical Education

2. Name one common PE exercise? Your choice A knee push up B piano keys

9966 [12]3 years ago

5 0

Not until we know what the questions are.

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Benzene is a starting material in the synthesis of nylon fibers and polystyrene (styrofoam). Its specific heat capacity is 1.74

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Answer: $62.7^0C$

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

$Q=m\times c\times \Delta T$

Q = Heat absorbed= 16.7 kJ = 16700 J (1kJ=1000J)

m= mass of benzene = 225 g

c = specific heat capacity = 1.74 J/gK

Initial temperature of the water = $T_i$ = 20.0°C = 293 k $0^0C=273K$

Final temperature of the water = $T_f$ = ?

Change in temperature , $\Delta T=T_f-T_i$

Putting in the values, we get:

$16700=225\times 1.74\times (T_f-293)$

$T_f=335.6K=62.7^0C$

The final temperature will be $62.7^0C$

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Why is the crank on a meat grinder larger than the crank on a pencil

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It takes more work to use a meat grinder

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A piston is filled with gas. When the pressure is increasing, what is happening to the volume? Assume that all other properties

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