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tigry1 [53]
2 years ago
7

5400 J of energy is supplied to 3 kg of aluminum, by how much

Mathematics
1 answer:
solmaris [256]2 years ago
3 0

Answer:

20°C

Step-by-step explanation:

Quantity if heat energy supplied is expressed as;

Q = mcΔt

m is the mass = 3kg

Δt is the temperature rise

Q = 5400J

c = 900 J/kg °C

Substitute

5400 = 3(90)Δt

5400 = 270Δt

Δt = 5400/270

Δt = 20°C

Hence the temperature rise is 20°C

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Bart recorded the amount of rain that fell in a desert in each month for one year. What was the total amount of rainfall in the
AlladinOne [14]

Answer:

A. 9.85 inches

Step-by-step explanation:

In the graph we can see that 1 month has a rainfall of 0.4 in, 2 months have a rainfall of 0.5 in, 1 month has a rainfall of 0.6 in, 2 months have a rainfall of 0.85 in, 1 month has a rainfall of 0.95 in, 2 months have a rainfall of 1.0 in, 2 months have a rainfall of 1.05 in and 1 month has a rainfall of  1.1 in.

The total amount of rainfall in the desert that year was: 0.4 + 2*0.5 + 0.6 + 2*0.85 + 0.95 + 2*1.0 + 2*1.05 + 1.1 = 9.85 inches

8 0
2 years ago
What is the domain and range of the equation y=500(1.08)^x
Marina CMI [18]
(x) is an element of a real number. This means it could be an integer, fraction or irrational number.

* As x approaches infinity, y approaches infinity.

* As x approaches minus infinity, y approaches 0.

-------------

Domain:

(x) is an element of a real number

Range:

y>0
6 0
2 years ago
Emerson purchased a game that was on sale for 18% off. The sales tax in his county is 8%. Let y represent the original price of
marshall27 [118]
1.08 * 0.82y <== ur expression

because 18% off means u r paying 82% of the original price (y).....and the sales tax is 8%...so we multiply 0.82y by 1.08


5 0
2 years ago
Dylan scored a total of 48 points in first 4 games of the basketball season. Which equation can be used to find g, the average n
belka [17]
G= 48/4???? that would make sense wouldn't it? because 48/4 would be the total number of points divided by the amount of games in which those points are scored. 

3 0
2 years ago
Read 2 more answers
If the average (arithmetic mean ) of 2,7, and x is 12, what is the value of x?
masya89 [10]

Answer:

x=27

Step-by-step explanation:

The mean is add all the numbers and divide by the number of points

(2+7+x)/3 =12

Multiply each side by 3

(2+7+x)/3 *3 =12*3

2+7+x = 36

Combine like terms

9+x = 36

Subtract 9 from each side

9+x-9 = 36-9

x = 27

7 0
2 years ago
Read 2 more answers
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