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Nana76 [90]
2 years ago
9

(01.03 MC)

Chemistry
1 answer:
vlada-n [284]2 years ago
5 0

Answer:

Explanation:

What you know is that the electrical energy comes from the wind turbine. Therefore the x must identify the type of energy that the wind turbine represents.

It must represent mechanical energy because blades of  the wind turbine turns to produce electrical energy.

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An aluminum kettle weights 1.05 kg and has a heat capacity of 0.9211 J over grams Celsius how much heat is required to increase
Serggg [28]

Answer:

64799.4 J

Explanation:

The following data were obtained from the question:

Mass (M) = 1.05 kg = 1.05 x 1000 = 1050g

Specific heat capacity (C) = 0.9211 J/g°C

Initial temperature (T1) = 23°C

Final temperature (T2) = 90°C

Change in temperature (ΔT) = T2 – T1 =

90°C – 23°C = 67°C

Heat required (Q) =....?

The heat required to increase the temperature of the kettle can b obtain as follow:

Q = MCΔT

Q = 1050 x 0.9211 x 67

Q = 64799.4 J

Therefore, 64799.4 J of heat is required to increase th temperature of the kettle from 23°C to 90°C.

4 0
3 years ago
If a microwave oven emits 1,100 J of energy every second, how long will it take for the microwave to emit 4650 J of energy? Expr
icang [17]

Answer:

Time = 4.2273 seconds

Explanation:

The amount of the energy emitted by the microwave = 1100 J/s

It means that :

1100 J of the energy is emitted in 1 second

Also,

1 J of the energy is emitted in [tex]\frac {1}{1100}[tex] second

To calculate:

Time for emitting 4650 J of energy

Thus,

4650 J of the energy is emitted in [tex]\frac {1}{1100}\times 4650[tex] second

<u>Time = 4.2273 seconds</u>

4 0
3 years ago
Give two examples of neutralization
klemol [59]

Answer:examples for neutralization - treating indigestion,treatment for insect bites.hope it help you

Explanation:

8 0
3 years ago
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} .

6 0
3 years ago
A given sample of gas has a volume of 5.20 L at 60.°C and 1.00 atm pressure. Calculate its pressure if the volume is changed to
BigorU [14]

Answer:

0.78 atm

Explanation:

Applying general gas equation

PV/T= P'V'/T'................ Equation 1

Where P = initial pressure, T = Initial temperature, V = Initial Volume, P' = Final pressure, V' = Final Volume, T' = Final Temperature.

make P' the subject of the equation

P' = PVT'/TV'.............. Equation 2

From the question,

Given: P = 1.00 atm, V = 5.20 L, T = 60°C = (273+60) = 333K, V' = 6.00 L, T' = 27°C = (27+273)K = 300 K

Substitute these values into equation 2

P' = (1×5.2×300)/(333×6)

P' = 1560/1998

P' = 0.78 atm.

5 0
3 years ago
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