3 years ago

The energy change in an endothermic reaction is: A. Internal B. External C. Negative D. Positive

Physics

1 answer:

77julia77 [94]3 years ago

4 0

Answer:

Positive

Explanation:

In an endothermic reaction, the products are at a higher energy than the reactants. This means that the enthalpy change of the reaction (∆H) is positive

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A fully loaded, slow-moving freight elevator has a cab with a total mass of 1200 kg, which is required to travel upward 54 m in

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Solution:

As per the question:

Total mass, M = 1200 kg

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Now, the work done by this force:

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3 years ago

an object weighting 100g is thrown upwards from the ground at a speed of 100 m/s.where will the potential energy of the object b

Kay [80]

Answer:

333.3 m

Explanation:

Given

$m =100g\ =\ 0.1kg\\v = 100 m/s\\g = 10 m/s ^2$

Potential energy = $\frac{2}{3}\ of\ Kinetic\ energy$ ......Equation(1)

We know that

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Kinetic energy = $\frac{1}{2} mv^{2}$

Now From the Equation(1)

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