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QveST [7]
3 years ago
14

5. A total of 65.0 kilojoules of heat are absorbed as 58,3 g of lead is heated from 12.0°C to

Mathematics
1 answer:
vova2212 [387]3 years ago
3 0
The specific heat is 34°C
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What is (9 x 10 ^-3)^2 in scientific notation
hodyreva [135]
<span> (9 x 10 ^-3)^2
= 81 x 10^-6
= 8.1 x 10^-5</span>
5 0
3 years ago
A circle passes through point (-2, -1) and its center is at (2, -1). Which equation represents the circle?
ludmilkaskok [199]

The choices are missing, but we can solve the problem from the given information

Answer:

The equation which represents the circle is (x - 2)² + (y + 1)² = 16

Step-by-step explanation:

The form of the equation of a circle is (x - h)² + (y - k)² = r², where

  • (h , k) are the coordinates of its center
  • r is the radius of it

∵ The coordinates of the center of the circle are (2 , -1)

∴ h = 2 and k = -1

The radius of the circle is the segment whose join the center of the circle and any point on the edge of the circle

∵ The circle passes through point (-2 , -1)

∴ The radius of the circle is the distance from the center (2 , -1)

    and the point (-2 , -1)

The y-coordinates of the two points are equal that means the radius is a horizontal segment and its length is the difference between their x-coordinates

∵ r = 2 - (-2)

∴ r = 4

Now let us substitute h, k, and r in the form of the equation of the circle

∵ (x - 2)² + (y - -1)² = (4)²

∴ (x - 2)² + (y + 1)² = 16

The equation which represents the circle is  (x - 2)² + (y + 1)² = 16

7 0
3 years ago
Whats the order pair of x,y for x-2y=-12 x 6y=20?
mote1985 [20]
X-2y=-12
x+6y=20
we can cancel x's
multiply first equation by -1 and add to 2nd equation

-x+2y=12
<u>x+6y=20 +</u>
0x+8y=32

8y=32
divide both sides by 8
y=4

sub back

x-2y=-12
x-2(4)=-12
x-8=-12
add 12 both sides
x=-4


(x,y)
(-4,4)
4 0
3 years ago
What value does the 3 represent n the number 16.344 ?
Maslowich

Answer:

Three hundred

Step-by-step explanation:

Because the whole number is sixteen thousand THREE HUNDRED forty four

7 0
2 years ago
Complete the question.
makvit [3.9K]

Answer:

6

Step-by-step explanation:

You are looking for the cross section of ask three circles. This is true for the smallest part, with the number 6 in it.

5 0
3 years ago
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