Mathematics High School

pPLSSSS4. You need to heat 7.59 g of water from 5.2 ºC to 368 K. How much heat is

needed? Give answer in Joules and calories.

_____J

_____cal

Answers

Answer 1

Answer:

Honestly im not sure

Step-by-step explanation:

5.2°C = (273 + 5.2)k = 278.2k

Change in temperature = 368k -278.2= 89.8k  

q (heat energy) = MCp∆T

When Cp of water =1046J

q = 7.59 g × 1046J × 89.8k

= 712, 934.772Jgk-1 = 713kJgk

When Cp of water =250cal

q = 7.59 g × 250 × 89.8k = 170kCalk

Related Questions

Can u help fast plz i’m gonna cry lol

Answers

Answer:

28.27

I searched it up

so the formula to find the area of a circle is A = pie x r or (radius)^2 so the radius is just squared.
so the radius of the circle is 3 so you would square that.
pie is 3.14(rounded)
A = 3.14(pie) x 3^2
A = 3.14 x 9
A = 28.26
my calculator got that which is different from the other person's answer but i hope this will help you!

Complete the following table for the equation y = 2x + 5

Table: 0. 1. 2. 5. 7.

Pls help im in the middle of a test

Answers

Answer:

0 is 5

1 is 7

2 is 9

5 is 15

7 is 19

Point 7,2 is translated vertically 2 units and horizontally -5 units. Where is the new point located?

Answers

Answer:

Step-by-step explanation:

(2,4)

I NEED HELP ASAP!!!!!!! I WILL GIVE BRAINLIEST!!!!!!!!!
Chris had 30 minutes to do a three-problem quiz. He spent 11 3/4 minutes on question A and 4 1/2 minutes on question B. How much time did he have left for question C?

Answers

Answer:Chris spent 13 3/4 minutes on question C

Step-by-step explanation:

First let's write an equation:

We know 30 is the total and we are trying to find a part, and 11 3/4 is a part and 4 and 1/2 is a part

So:

30=11 3/4 + 4 1/2 + x

30=16 1/4 + x

- 16 on both sides(to find what x equals to)

13 2/4=x

X=13 3/4

Using the graph above identify the constant of proportionality between the number of shirts and how much they cost? Hint: simplify your answer
A. K=80
B. K=20
C. K=10
D. k=8

Answers

Answer:

We conclude that the constant of proportionality between the number of shirts and how much they cost is:

k = 8

Hence, option 'D' is correct.

Step-by-step explanation:

We know that when 'y' varies directly with 'x', we get

y ∝ x

y = kx

k = y/x

where k is called the constant of proportionality

Given the points

(10, 80)(20, 160)(50, 400)

For (10, 80)

substituting y = 80 and x = 10 in the equation

k = y/x

k = 80/10 = 8

For (20, 160)

k = y/x

k = 160/20 = 8

For (50, 400)

k = y/x

k = 400/50 = 8

It is clear that the value of k is the same for all the points.

Thus, the value of k = 8

Therefore, we conclude that the constant of proportionality between the number of shirts and how much they cost is:

k = 8

Hence, option 'D' is correct.

Use the given x and y values to write a direct variation
equation. Enter your answer in the form y = kx.
x = 5, y = 50

Answers

The form is y = kx

Replace y and x:

50 = k(5)

Solve for k by dividing both sides by 5

K = 10

please help thank you so much

Answers

Answer:

Q=63 degrees

Step-by-step explanation:

R=60 degrees

since T=123 degrees, S=180-123=57 degrees

There is 180 degrees in a triangle

Q=180-60-57

Q=63 degrees

The dimensions of a rectangle are given in terms of S as shown below or above.

Q. Which expression represents the perimeter of the rectangle? Mark all that apply.

Answers

Answer:

A and D

Step-by-step explanation:

It should be Sx2 + 2(S+ 1/2)

Which is equal to 4s+1

and 2(2s + 1/2) is equal to 4s+1 as well

Please answer this question for me.

Answers

Answer:

37%

Step-by-step explanation:

the shape is 10 by 10, or 100 squares.

37 of the squares are shaded in.

37/100

37%

I think the answer is 37% (srry if it's wrong)

Steve’s IQ increases by 0.25% each
day that he attends his algebra class.
After the first day of class, he has
an IQ of 90. What will it be after
attending all 180 classes this year?

Answers

Answer:

141

Step-by-step explanation:

because i have the answer key


Simplify the expression:
-3(3 – 06y)

Answers

Answer:

18y−9

Step-by-step explanation:

Answer:

-9 - (-18y)

simplified more answer : -9 + 18y

if the 06 is a decimal then: answer: -9 - (-1.8y)

more simplfied answer: -9 + 1.8y

Step-by-step explanation: -3 x 3 = -9

-3 x 6y = -18 y

(if 06 a decimal: -3 x 0.6y = -1.8y)

variable answers (answers with a letter ) cannot be added together with a non variable answer

I just need help solving for A​

Answers

Answer:

115

Step-by-step explanation:

The answer will be ( 115 )

5/5 x 2/34 will be less than greater than or equal to

Answers

Answer:

It would be less than becuase 5/5=1 an 2/34= 17

Step-by-step explanation:

it would be less than

At a Chinese buffet, there are five
entree selections. If two entrees may be
selected, how many ways may the
plates be filled?

Answers

10 different ways.....

Answer:

I know I'm a little late, but there are 10 different ways the plate can be filled.

Step-by-step explanation:

Formula:

HELP PLS! i’ll give brainliest :)

Answers

Answer:
<-4
>10
Explication:

2. Which one of the following could be the cruising speed of a jetliner?
A. 90 km/h
B. 900 km/h
O C. 9.000 km/h
D. 90.000 km/h

Answers

Answer:

900 km/h

Step-by-step explanation:

Sample Response: To find the image after a reflection over the x-axis, I would negate the y-coordinate. To find the image after a reflection over the y-axis, I would negate the x-coordinate. So, reflecting the point (5, 2) over the x- and y-axis, I would get (–5, –2).

Which did you include in your response? Check all that apply.
Negate the y-coordinate.
Negate the x-coordinate.
Get the point (–5, –2).

Answers

Answer:

egg

Step-by-step explanation:

eggs are BlUe

Answer:

select all of them bc there all correct

Step-by-step explanation:

Hannah takes a sheet of paper and cuts from one corner to the opposite corner, making two triangles. If the length of the cut is 12inches and the paper is 8 inches long, what is the width of the sheet of paper (nearest tenth)?

Answers

The answer would be 10 inch

https://files-cdn.schoology.com/eff1043385e13ac014eaf6e69f84525b?content-type=app

Answers

Answer:

srry i need points

Step-by-step explanation:

Answer:k

Step-by-step explanation:

k

Louis wants to carpet the rectangular floor of his basement. The basement has an area of 2,000 square feet. The width of the basement is 4/5 its length. What is the length of Louis's basement?

Answers

Answer: 50 feet

Step-by-step explanation:

Let the length be represented by x

The width of the basement is 4/5 its length. Therefore, the width is 4/5x = 0.8x

Area = Length × Breadth

2000 = x × 0.8x

0.8x² = 2000

x² = 2000/0.8

x = ✓2500

x = 50

Therefore, the length is 50feet

14.4 A Book and a Cake A book costs $45. Sales tax on the book is 7%. Write two different expressions that represent the final cost of the book in dollars. Pne of the expressions should use only a single multiplication and no other operations.
A cake that costs $32 is on sale for 15% off and there are no taxes. Explain why the expression (0.85).32 represents the final price of the cake in dollars
(0.85). 32 represents the final price of the cake in dollars because...​

Answers

Answer: 1. $45*1.07 | $45(1.07) 2. (0.85)*32 represent the final price of the cake in dollars because (0.85) is the 15% off in decimals.

Step-by-step explanation:

1 if you multiply 45 by 1.07 it will be 48.15 and that's the final cost of the book, same with $45(1.07) is just another way to represent the multiplication.

2 As I said the 0.85 represent the 15% off, and when you multiply it will be less.

help it due by tonight and I have no clue how to do it

Answers

Answer:

Step-by-step explanation:

Bro, for the $500 after the rate add 12 and 12 and do that for all the rate's like when you get to the fraction rate add the fraction rate with the fraction rate

Ariel bought 8 balloons for $3.20. Mrs.Torres spent $38.40 on balloons at the same store. How many balloons did Mrs.Torres buy?
A.15
B.96
C.40
D.64

Answers

Answer:

96 because 3.20 divided by 8 is 0.4 and 0.4 times 96 is 38.4

Please help
In CDE, the measure of ZE=90°, DC = 37, ED = 35, and CE = 12. What is the value
of the sine of D to the nearest hundredth?

Answers

Answer:

Step-by-step explanation:

Answer:

0.3243

Step-by-step explanation:

A plane descended an average of 200 feet per second for 15 seconds. How far had the plane descended at the end of the 15 seconds?

Answers

Answer:

3000 ft

Step-by-step explanation:

If we're going 200 ft per one second, that means, to find the distance after 15 seconds, then we have to multiply:

200 fps (feet per second) x 15 seconds = distance.

Distance = 3000 ft

Bill baked 16 cookies with 2 scoops of flour. With 4 scoops of flour, how many cookies can Bill bake? Assume the relationship is directly proportional.

Answers

Answer:

Let c = the number of cookies

cookies/scoops of flour: 12/2 = c/3

Cross multiply.

2c = 36

c = 18 cookies

Step-by-step explanation:

Answer:

32 cookies.

Step-by-step explanation:

Find how much cookies Bill can bake with just 1 scoop of flour:

2 scoops of flour = 16 cookies

1 scoop of flour = 16 ÷ 2 = 8 cookies

Now, find 4 scoops of flour.

4 scoops of flour = 8 x 4 = 32 cookies

I need to know the answer step by step.

Answers

Answer:

108

Step-by-step explanation:

Since B=3, you need to do 4(3)^2*3

Do 3^2, which is 9,

4*9=36,

36*3=108

state if polygons are similar

Answers

Answer:

yea its is

Step-by-step explanation:

I’ll give brainlest if it’s right Evaluate the expression when y = 5.
3+ y + 6
09
O 14
O 19
0 21

Answers

14. 3+5+6=14 i think

amy has 24 dolls, 18 of her dolls have blond hair and the rest have black what is the ratio of the number of dolls that have black hair to the number of dolls that have blond haie

Answers

Answer: 6 : 24 is for black haired and 18 : 24 is for blond

Step-by-step explanation:

18 : 24

24 - 18 = # of black haired dolls

6 = # of black haired dolls

Ratio

6 : 24

Other Questions
pls help!! it's due in a few minutes :(Graph {x | x -2}. 14 points please HELP ME someone help me with this What is the mean income of the following three people surveyed? Person A: S22,000, Person B: $31,000, Person :$21,000. Round to the nearest $100 Solve for t.-18 = 6tA. t = -3B. t = -1/3C. t = 12D. t = 24 Read the passage, then answer the question that follows.It has had a hard life of it, this feeling of Imperial patriotism. It was checked for a generation by the apathy and the indifference which were the characteristics of our former relations with our Colonies, but it was never extinguished. The embers were still alight, and when in the late war this old country of ours showed that it was still possessed by the spirit of our ancestors, and that it was still prepared to count no sacrifice that was necessary in order to maintain the honor and the interests of the Empire, then you found a response from your children across the seas that astonished the whole world by a proof, an undeniable proof, of affection and regard. I Believe in a British Empire,Joseph ChamberlainWhy is Chamberlains argument effective? Check all that apply.He makes a concession about imperialism, showing both sides of the argument.He uses an appeal to emotion with words like honor and sacrifice to stir nationalism.He uses an appeal to logic by comparing imperialism to a glowing fire.He cites statistics to support his claim.He cites evidence of winning the recent war to show that people still sacrifice for the empire what is the system to ensure equality between the branches of gvernment If angle a= 143 degrees and angle c = 61 degrees, in what is the measure of angle b? What is the molar concentration of a solution of 9.88 g MgSO, dissolved in 75 mL water ? Directions: Read each sentence. Identify the complete prepositionalphrase. Circle your response.1. Franken-Truck jumped heedlessly over a burning pile of cars.b)over carsa)overd)over a burning pile of carsc) over a pile of cars2. Lugnut landed disruptively on the dirt track and created a thick dust cloud.bon the dirt tracka)on the dirtd)on the dirt track and madec) disruptively on the dirt track3. The once unbeatable Truckavore was tied with Franken-Truck as they crossed the finish line.b) the finish linea) tied withd)crossed the finish linec) with Franken-Truck4. King Crush's truck had a golden crown on the roof and it shimmered resplendently as hedrove.b)as he drovea) on the roofd) on the roof and it shimmeredc) and it shimmered5. Distrucktor furiously raced around the corner as he tried to catch King Crush.b) around the cornera) as he triedd) around the comer as he triedc) raced around the corner Write the equation of a line going through the points (4,2) and (7,-3). This committee is designed to research or work on a specific event or issue, such as the assassination of JFK or the climate crisis. Grey ran 2.4 times as many miles as Emory. If Emory ran 2.08 miles, how many miles did grey run? Which information in a bibliographic citation can you use to determine ifinformation is valid or not? Your test in math class has problems worth 2 points and problems worth 4 points. Altogether the test has 100 points. Write an equation that represents the total points on the test formed by the number of 2-point problems and the number of 4-point problems. Use the quadratic formula to find the solutions fory = 3x^3 + 8x - 1 Which statement is true? x = 157, because 180 - 23 = 157x = 33, because 180 - (124 + 23) = 33x = 56, because 180 - 124 = 56x = 147, because 23 + 124 = 147PLEASE ANSWER FAST!!!! A company has derivatives transactions with Banks A, B, and C which are worth +$20 million, $15 million, and $25 million, respectively to the company. How much margin or collateral does the company have to provide? The transactions are cleared bilaterally and are subject to one-way collateral agreements where the company posts variation margin, but no initial margin. The transactions are cleared centrally through the same CCP and the CCP requires a total initial margin of $10 million. Select the word that offers the best antonym for wan.A. cheerful B. flushed C. grimD. unrecognizable these are used to find information on the internet they include key words side bars hyper link and serch enjins