Answer:
compounds C and D
Explanation:
I believe this is correct
<u>Statement</u><u>:</u>
Jane does 5 joules of work when she closes her bedroom window. She applies a force of 6 newtons to do the job.
<u>To </u><u>find </u><u>out:</u>
The displacement of the window when she pulled it.
<u>Solution</u><u>:</u>
- Work done (W) = 5 J
- Force (F) = 6 N
- Let the displacement of the window be s.
- We know, the formula of work done, i.e., W = Fs
- Putting the values in the above formula, we get
- 5 J = 6 N × s
- or, s = (5 ÷ 6) m
- or, s = 0.83 m
<u>Answer</u><u>:</u>
She pulls the window by 0.83 m.
Hope you could understand.
If you have any query, feel free to ask.
<span>An insulator resists conduction of electrons.</span>
Answer: h = 20.92 m
Explanation: By using the law of conservation of energy, the kinetic energy of the ball equals it potential energy.
Kinetic energy =mv^2/2
Potential energy = mgh
Where m = mass of the object, v = velocity of object = 23.5 m/s
g = acceleration due gravity = 9.8 m/s^2
mv^2/2 = mgh
m cancels out each other on both sides , hence we have that
v^2 = 2gh.
We want the ball to move towards the wall (horizontal motion), hence we need the horizontal component of the velocity since the velocity is inclined at an angle of 30.5 to the ground (horizontal).
Hence v = 23.5 × cos 30.5, v = 20.248 m/s
Recall that v^2 = 2gh
(20.248)^2 = 2×9.8×h
409.98 = 19.6 h
h = 409.98/ 19.6
h = 20.92 m
