4 years ago

Which of these processes are chemical reactions?

Physics

1 answer:

Rudiy274 years ago

4 0

I’m not very good at this subject but I’d say it’s A Boiling an egg

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3. A car going 22m/s accelerates to pass a truck. Five seconds late the car is going 35m/s. Calculate the acceleration of the ca

DedPeter [7]

Answer:

Explanation:

6 0

3 years ago

An engine does 10 J of work and exhausts 25 J of waste heat during each cycle.

noname [10]

The thermal efficiency is defined as follows

$\eta = 1 - \frac{Q_{\text{out}}}{Q_\text{in}}$ ,

and the energy which is put into the system is

$Q_{\text{in}} = W_\text{out} + Q_\text{out}$ .

In your case $Q_\text{in} = 25 \text{ J},W_\text{out}=10 \text{ J}.$

So $Q_\text{out}=10 \text{ J}$ which gives an efficiency of

$\eta = 1 - \frac{10 \text{ J}}{25 \text { J}} = 0.6 = 60 \%$ .

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3 years ago

_____________ and ____________ can fly in the stratosphere.<br><br> Fill in blanks

soldi70 [24.7K]

Jets and planes can fly in the stratophere

7 0

4 years ago

Read 2 more answers

Which of the following has the lowest density ? A.mineral water b. Water c. Oxygen d. Salt water

tia_tia [17]

Answer:

Explanation:

Mineral water, water, and salt water are all liquid solutions, while oxygen is a gas. Gases are less dense than liquids.

7 0

4 years ago

Shows an oil tank that has a rectangular base of dimensions 2.4 m by 1.5 m. oil depth of oil 2.4 m 1.5 m

Nutka1998 [239]

Answer:

45 000 N

Explanation:

$pressure \: = \frac{force}{area} \\ density \times g \times height = \frac{force}{area} \\ (850)(9.81)(1.5) = \frac{force}{(2.4)(1.5)} \\ force \: = 45000n \: (3sf)$

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4 years ago