A system conducts 50. J heat to the surroundings while delivering 20. J of work. What is the change in internal energy

1 answer:

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1. “what forms of energy conversions occur during the process of photosynthesis? (How does energy transform?) 2. What is missing from the food web but is essential to maintain equilibrium? A. Soil B.water C. Decomposers D. Oxygen

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Write three characteristics of mandleef's periodic table?

Slav-nsk [51]

Answer:

The periodic table is composed of seven horizontal rows or periods and is numbered between 1 and 7. There is a regular gradation in the properties of elements in the horizontal rows(periods) from left to right. The periodic table is composed of eight vertical columns or groups. They are numbered between 1 to 8.

Explanation:

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3 years ago

How do you measure heat in high school chemistry

FrozenT [24]

Answer: Calories

Explanation: One calorie is the amount of energy required to raise one gram of water one degree Celsius

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How is the Hvap used to calculate the mass of liquid boiled by 1 kJ of energy?

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The heat used in phase changes is calculated by multiplying the mass of the substance by the energy of the phase change. In this case, for liquid to boil, we would find total heat by multiply the mass of liquid by the latent heat of vaporization (Hvap). If we are instead given the Hvap and the total heat of 1 kJ, we would divide 1 kJ by the Hvap (which is usually in kJ/kg) to get the mass of liquid boiled (in kg).

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What were the peak concentration for intravenous

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A certain satellite orbiting Earth has a speed of about 17,000 miles/hour. What is its approximate speed expressed to the correc

algol [13]

Answer:- The speed of the satellite is 7.6 $\frac{kilometer}{second}$ .

Solution:- It's a unit conversion problem that could be solved using dimensional analysis which is also known as train trail method.

The given speed of the satellite is 17000 miles per hour and we are asked to convert it to kilometers per second.

given:

1 Kilometer = 0.62 mile

1 hour = 3600 second

Let's use this given info and plug in the values to make the set up as:

$17000\frac{mile}{hour}(\frac{1 kilometer}{0.62 mile})(\frac{1 hour}{3600 second})$

= 7.616 $\frac{kilometer}{second}$

We round the answer to two significant figures, since the given number(17000) has only two significant figures.

Hence, the speed of the satellite is 7.6 $\frac{kilometer}{second}$ .

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