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4 years ago

In refraction, when a wave travels from one medium to another, it

Physics

2 answers:

Alona [7]4 years ago

8 0

A.) Changes speed

hope this helps

kirill115 [55]4 years ago

3 0

In refraction, when a wave travels from one medium to another it changes speed.

Correct option is A.

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The electric field between the plates of a parallel-plate capacitor is horizontal, uniform, and has a magnitude E. Asmall object

kirza4 [7]

Answer:

$m = 0.041 kg$

Explanation:

As we know that the small particle is in equilibrium at an angle of 16 degree with the vertical

so here we can use force balance in vertical and horizontal direction

$T cos\theta = mg$

$T sin\theta = qE$

now from above equation we have

$T = \sqrt{(mg)^2 + (qE)^2}$

also by division of above two equations we have

$\frac{qE}{mg} = tan\theta$

$qE = mg tan\theta$

now from above equation again

$T = \sqrt{(mg)^2 + (mg)^2 tan^2\theta}$

$T = mg sec\theta$

$0.420 = m(9.81) sec 16$

$m = 0.041 kg$

3 0

3 years ago

The statement that no two electrons in the same atom can have the same four quantum numbers is a restatement of

andreev551 [17]

Answer:

Pauli exclusion principle

Explanation:

Pauli's exclusion principle speaks to the quantum numbers assigned to an electron to describe it's general position and movement. Two electrons can occupy the same energy level (which is described by the first quantum number-the principal quantum number), the orbital angular momentum quantum number (represented by the second number) and magnetic quantum number. electrons that have the same value for all three numbers will have different spins. one will have positive a half while the other has negative a half. Therefore they will never have the same complement of quantum numbers

6 0

3 years ago

A crew team rows a boat at a rate of 20 km/h in still water. Beginning at time = 0 minutes, the team rows for 30 minutes up a ri

umka21 [38]

Since they are rowing against the current, their velocity realtive to the groud is 20-1.5 = 18.5km/h
So the distance travelled is 18.5km/h*0.5h = 9.25km
Going back with the current their ground realative velocity is 20+1.5 = 21.5km/h so the time it takes them to return 9.25 km is 9.25km/(21.5km/h) = 0.43h ~= 26 min

7 0

3 years ago

Which best describes what is made of matter?

DiKsa [7]

A. All living things and objects

5 0

4 years ago

What does the slope of a secant line represent

blsea [12.9K]

Answer:

Secant line is a straight line which joins the two points of functions and it also represents the slope between two points.

Explanation:

Secant line is also known as average rate of change of functions between two points and also called slope.

In mathematical form,

Secant line = average rate of change = slope

Slope m = y/x

3 0

3 years ago