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3 years ago

12

When a substance cools down, is it releasing or absorbing energy?

1 answer:

Wewaii [24]3 years ago

4 0

<span>When something becomes cold or freezes such as water,it is releasing energy.The temperature continues to decrease more energy is given up and released.It stays a constant temperature as more energy is released to maintain the temperature needed to achieve the correct degree needed.</span>

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Morgan and Lily are studying the density of substances. After determining a block's mass and volume, they determine its density

slavikrds [6]

The formula of Density is known as:

Density = mass/volume

Units: g/cm^3

Hope this helps!

3 0

3 years ago

For each of the following cases, identify the order with respect to the reactant, A. Case (A ----> product)

damaskus [11]

Answer:

The answers to the question are

1. 2nd and above order order

2. 2nd order

3. 1/2 order

4. 1st order

5. 0 order

Explanation:

We have $\frac{N}{N_{0} } = e^{-\lambda t}$

1. For nth order reaction half life $t_{\frac{1}{2} }$ ∝ $\frac{1}{[A_{0} ]^{n-1} }$

Therefore for a 0 order reaction increasing concentration of the reactant there will increase $t_{\frac{1}{2} }$

First order reaction is independent [A₀].

Second order reaction [A₀] decrease, increase.

Similarly for a third order reaction

1. 2nd order

2. 2nd order reaction

3. Order of reaction is 1/2.

4. 1st order reaction.

5. Zero order reaction.

5 0

3 years ago

If a sloth is traveling at its top speed of 0.067 m/s (0.15 mph), how long does it take the sloth to travel a 11.5 meter tree?

marishachu [46]

I think the answer is a: 17mins

7 0

2 years ago

Read 2 more answers

if the half-life of substance A is 1.5 years, how long would it take a 8.0 gram sample of substance A to decay such that only 1.

Fudgin [204]

Answer:

4.5

Explanation:

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3 years ago

A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over

hoa [83]

B. Molecules in both the metal and the surrounding air will start moving at higher speeds.

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3 years ago