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Shtirlitz [24]
3 years ago
9

COULD SOMEONE PLS DO THESE FOR ME I’LL LOVE U FOREVER AND EVER

Physics
1 answer:
sladkih [1.3K]3 years ago
7 0
I can help you do them for yourself :)
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A student forgets to turn off a 6.00x 10² W block heater of a car when the weather turns warm. If 14 h goes by before he shuts i
Inga [223]

Answer: 8.4 kW•hr

Explanation:

600 W • (14 hr) / (1000 W/kW) = 8.4 kW•hr

3 0
3 years ago
If the radius of silver is 0.144 nm, what is the PD of the (100) plane for silver in m-2?
Brrunno [24]

Before going to solve this question first we have to understand planar density of a crystal lattice.

Planar density of a plane is given defined-

                                                 PD=\frac{N}{V}

Where N is number of atoms centred in the plane and A is the area of the plane.

As per the question we have been given silver.

We know that silver is a face centered cubic crystal. i.e FCC

The radius of silver [r] is given as 0.144 nm.

1 nm=10^{-9} m.

Hence radius r =0.144*10^{-9} m

We have to calculate the PD of [100] plane of silver.

The area of [100] FCC is 8r^2 where r is the radius silver.

The number of atoms centered on [100] plane is 2.It is so because four atoms will be shared by four corners of the cube and there will be one central atom.Hence there will be only two atoms in one unit cell of [100] plane of silver.

Now we have to calculate the planar density PD.We know that-

                                                       PD=\frac{N}{A}

                                                               =\frac{2}{8r^2}

                                                               =\frac{2}{8*[0.144*10^{-9}]^2 }

                                                               =12.05632716*10^{18} m^{-2}  [ans]

4 0
3 years ago
Can black wholes be an exit to the universe,why or why not? (just curious).
Sidana [21]
I really doubt because the universe is supposed to be infinite
8 0
3 years ago
Read 2 more answers
Would the springs inside a bathroom scale be more compressed or less compressed if you weighed yourself in an elevator that was
Ber [7]
More compressed. moving up = apparent weight (i.e., your norma force) is greater. this means you’ll weighr more and push those springs down even more than you would at rest.
6 0
2 years ago
An object travels with velocity v = 4.0 meters/second and it makes an angle of 60.0° with the positive direction of the y-axis.
Galina-37 [17]
Vx=cos60(4)
x-component of velocity
If you think about it, it makes a right triangle when you combine all the different types of forces together such as v, vx and vy. Then, you can use trigonometry and soh cah toa in order to figure out vx.
8 0
3 years ago
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