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Kryger [21]
2 years ago
8

How much heat is gained by 1.0 gram of iron when its heated 15 degrees celsius

Physics
1 answer:
Firdavs [7]2 years ago
3 0
Q = mass water x specific heat water x delta T. 
<span>714,000 = mass water x specific heat water x 30.
Substitute specific heat water and solve for mass water.</span>
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The pressure of a gas contained in a cylinder with a movable piston is 490 Pa. The area of the piston is 0.8 m2. Calculate the m
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Objects 1 and 2 attract each other with a electrostatic force of 18.0 units. If the charge
xxMikexx [17]

Answer:

new force is 6 times of the initial force.

Explanation:

Let the charges on two objects is q₁ and q₂. The electric force between charges is given by :

F=\dfrac{kq_1q_2}{r^2}

Objects 1 and 2 attract each other with a electrostatic force of 18.0 units

If the charge  of Object 1 is doubled and the charge of object 2 is tripled, it means, q_1'=2q_1 and q_2'=3q_2. New force is given by :

F'=\dfrac{kq_1'q_2'}{r^2}\\\\F'=\dfrac{k(2q_1)(3q_2)}{r^2}\\\\F'=6\dfrac{kq_1q_2}{r^2}\\\\F'=6F

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5 0
2 years ago
The speed of a sound wave depends mostly on ?
jeyben [28]
<span>The medium in which it travels through</span>
7 0
3 years ago
Which describes one event that causes an eclipse?
Burka [1]

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3 years ago
Determine the focal length of a plano-concave lens (refractive index n =1.5) with 24 cm radius of curvature on its curve surface
tatyana61 [14]

Answer:

Option 3: -48 cm

Explanation:

We are given:

refractive index; n = 1.5

radius of curvature; r2 = 24 cm

Formula for the focal length is given as;

1/f = (n - 1) × [(1/r1) - (1/r2)]

As r1 tends to infinity, 1/r1 = 0

Thus,we now have;

1/f = (n - 1) × (-1/r2)

Plugging in the relevant values;

1/f = (1.5 - 1) × (-1/24)

1/f = -0.02083333333

f = -1/0.02083333333

f = -48 cm

3 0
2 years ago
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