PHYSICS HIGH SCHOOL

Which "sphere" does an astronomer most directly study?a. biosphere
b. exosphere
c. geosphere
d. cryosphere E. atmosphere F. hydrosphere

Answers

Answer 1
Answer: I would choose B. exosphere. Astronomers study outer space, planets and ect.
Answer 2
Answer:

Answer:

exosphere

Explanation:

exosphere is space

astronomy is space

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Which would be the best strategy for overcoming tobacco addiction?

Answers

by eating bananas because bananas contain potassium which helps you quite smoking hope this helps

Answer:

A. Tell friends, and commit a day to start quitting.

Explanation:

Additional support from close friends and family is one of the easiest and most efficient ways of reducing, then quitting tobacco / nicotine addictions. (I also got this answer right on Plato / Edmentum).

If We Start With 400 Atoms of a Radioactive Substance, How Many Would Remain After One Half-life ?

Answers

If it's half life, that means that half of the atoms have died out. Therefore, 200 atoms have died, so there are 200 atoms left (exactly one half of 400)
200, the half life of a radioactive substance is pretty simple to remember. It is literally cutting it in half, however, don't make the same mistake I did in this subject, the second half life does not reduce it to 0, it reduces it to 100. It just keeps half-lifing over and over again. For example: 400 atoms after one half life:200, after two: 100, after 3, 50, and so on.

Two cylindrical resistors are made from same material and have the same length. When connected across the same battery, one dissipates twice as much power as the other. How do their diameters compare ?

Answers

Answer:

(d_2)/(d_1) = \sqrt2 = 1.41

Explanation:

As resistor is connected to the battery of constant EMF then the power across the resistor is given as

P = (E^2)/(R)

now if two resistors are made up of same material and of same length then due to different cross sectional area they both have different resistance

Due to different resistance they both will have different power

Since power is inversely depends on the resistance

So if the power is twice that of the other then the resistance must be half

so we have

R_1 = \rho (L)/(A_1)

R_2 = \rho(L)/(A_2)

since one resistance is half that of other resistance

So the area of one must be twice that of other

so we have

(A_2)/(A_1) = 2

(\pi d_2^2)/(\pi d_1^2) = 2

d_2 = 1.41 d_1

Geologists cannot yet predict earthquakes because

Answers

Geologists cannot yet predict earthquakes because the earthquakes caused by the movement of plates do not have the precise time and place when will it moves.

Monochromatic coherent light shines through a pair of slits. If the wavelength of the light is decreased, which of the following statements are true of the resulting interference pattern? (There could be more than one correct choice.) Check all that apply. Check all that apply. The distance between the maxima decreases.
The distance between the minima decreases.
The distance between the maxima stays the same.
The distance between the minima increases.
The distance between the minima stays the same.

Answers

The right answer for the question that is being asked and shown above is that: "The distance between the maxima stays the same; The distance between the minima stays the same.; . The distance between the maxima decreases."

Beth has built a simple series circuit using wire, a battery, a lightbulb, and a switch. The bulb, however, does not light up when the switch is closed. Which describes a step that will help troubleshoot and work toward the solution of this problem?

A.
Reverse the way the wire is connected to the poles of the battery.

B.
Use an electrical meter to test the voltage of the battery.

C.
Shorten the length of wire between the battery and the switch.

D.
Change the wiring scheme to parallel.

Answers

The right answer for the question that is being asked and shown above is that: "A. Reverse the way the wire is connected to the poles of the battery." the statement describes a step that will help troubleshoot and work toward the solution of this problem is that Reverse the way the wire is connected to the poles of the battery.
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