Which describes the electric forces inside an atom?A. Gravitational forces are much stronger than electric forces.

B. Electric forces and gravitational forces are equal in this setting.

C. Electric forces are much stronger than gravitational forces.

Answers

Answer 1

Answer:

Answer:The correct answer is option C.

Explanation:

Electrical forces are forces between the charge particles of different charges or of same charges.This type of force is termed as electrostatics forces.

Like charges repel each other and unlike charges attract.They are dipole forces and stronger than the gravitational forces which only attracts and are monopole forces.

Atom consist of protons and electrons with positive and negative charge respectively.The force between these subatomic particles are very stronger than the gravitational forces between these particles.This is due to very smaller masses of protons and electrons the gravitational force between them is very small.

Answer 2

Answer:

the correct answer is C hope this helps a little

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Denise wears an extremely bright safety yellow sweatshirt when she cycles to the gym after dark. The sweatshirt's brightness reflects the _____ of the light it reflects.

Answers

Answer:

High Amplitude

Explanation:

If the light from Star X is brighter than the same type of light from Star Y, you know that the light you see from Star X has a higher amplitude.

Denise wears an extremely bright safety yellow sweatshirt when she cycles to the gym after dark. The sweatshirt's brightness reflects the high amplitude of the light it reflects.

Final answer:

The brightness of Denise's sweatshirt while cycling after dark reflects the intensity of light it reflects. The color yellow is perceived when an object reflects red and green light and absorbs blue light. The brightness can also be enhanced by the reflection efficiency of the sweatshirt's material and its fluorescence properties.

Explanation:

Denise's extremely bright safety yellow sweatshirt when she cycles to the gym after dark, reflects the intensity of the light it reflects. The color of an object is determined by the wavelengths of light that the object reflects. A yellow object appears yellow because it reflects yellow light and absorbs other colors. Reflection of light is the fundamental concept behind the brightness of the sweatshirt.

The yellow sweatshirt absorbs blue light and reflects red and green light, which our eyes perceive as yellow. The intensity or brightness of the sweatshirt is a function of how much light it reflects back. Another important factor is the reflection efficiency of the sweatshirt's material. Some materials are better at reflecting light than others which can enhance brightness.

Also, the fluorescence property of some safety colors makes them emit more light than they receive which enhances their brightness, this is especially useful in low light conditions, such as cycling after dark.

Learn more about Light Reflection

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The time, t, required to drive a fixed distance varies inversely as the speed, r. It takes 9 hr at a speed of 20 km/h to drive a fixed distance. How long will it take to drive the same distance at a speed of 23 km/h?

Answers

Answer:

Time=7.84hrs

Explanation:

This is an inverse proportionality questions

Mathematically time t varies as 1/distance d

Hence T= dk/r

But speed r = distance/t

d= r*t= 9*20=180km/hr

We're k= constant of proportionality

At t=9hrs d=180km/hr

Hence k=r*t/d=20*9/1620=0.111

Finding t at at 1620km for 23km/hr

t=1620*0.111/23=7.84hrs

A 1200-nF capacitor with circular parallel plates 2.0 cm in diameter is accumulating charge at the rate of 35 mC/s at some instant in time. (A) What will be the magnitude of the induced magnetic field 10.0 cm radially outward from the center of the plates?

Answers

Answer:

$B = 7 * 10^(-8) T$

Explanation:

As we know that charge on the plates of capacitor is changing at rate given as

$i = (dq)/(dt) = 35 mC/s$

now this rate of charging the plates will give the displacement current in the region between the plates

Now by Ampere's law we can say

$\int B . dl = \mu_0 i$

now we have

$B(2\pi r) = \mu_0 i$

$B = (\mu_0 i)/(2\pi r)$

$B = (2 * 10^(-7) (35 * 10^(-3)))/(0.10)$

$B = 7 * 10^(-8) T$

What type of reaction occurs in the cores of stars to create their tremendous amounts of energy?a. fusion
b. fission
c. physical
d. chemical

Answers

The correct answer is A.

Which of the following best defines "medium of exchange"?A. something with a fixed value that we use for exchange
B. a way to determine what is the best deal
C. the average value exchange of a single good or service
D. a monetary rate that stays constant

Answers

Answer:

The best sentence to define "medium of exchange" is:

A. something with a fixed value that we use for exchange

Explanation:

The medium of exchange is the concept to name the tool we use as a medium to exchange different products with the intention o reaching an objective agreement. To achieve this, the medium of exchange has to have a general value and even when its value can increase or decrease based on the economical conditions of the environment it is adaptative and will always behave in a proportional ratio.

I find the first option best.

B. even if something is a best deal - we might not be able to get it, so exchange might not even take place.
C. this would not be a "medium"
D. - well, there isn't such a rate, is there?

So, answer A is really the best - and I think it's also a good definiton

You run straight off a high diving board at a speed of 6 m/sec. You hit the water 2 seconds later.a. How far did you travel horizontally during the 2 seconds?
b. How far did you travel vertically during the 2 seconds?
c. How fast were you moving horizontally when you hit the water?
d. How fast were you moving vertically when you hit the water?