How far does light travel in 1 millisecond that is, in one hundredth of a scecond?

Answers

Answer 1

Answer: First of all, we have to convert the time into seconds:
$t=1 ms=0.001 s$
Light travels at speed of $v=3\cdot 10^8 m/s$ .
The distance covered by the light during this time can be found with the formula
$v= (S)/(t)$
where S is the distance covered and t the time. By re-arranging this formula and by plugging the numbers into it, we find how far the light went in 1 millisecond:
$S=vt=(3\cdot 10^8)(0.001 s)=3 \cdot 10^5 m.$

Answer 2

Answer:

Final answer:

The speed of light is approximately 299,792 kilometers (186,282 miles) per second. Given a millisecond is a thousandth of a second, light will travel approximately 299.792 kilometers in one millisecond.

Explanation:

The speed of light in a vacuum, such as outer space, is a set constant in physics, approximately 299,792 kilometers per second, or about 186,282 miles per second. Thus, if we want to know how far light travels in 1 millisecond, that is, one hundredth of a scecond, we need to convert seconds into milliseconds.

There are 1,000 milliseconds in one second. Hence, in 1 millisecond, light will travel about 299.792 kilometers (or about 186.282 miles).

Learn more about Speed of Light here:

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This nutrient can be hidden in food and has twice as many calories as other nutrients

Answers

protein has 4 cals carbs have 4 too. Fat however has 9.

How much amount of heat is required to raise the temperature of 20 grams of water from 10°C to 30°C? The specific heat of water is 4.18 J/g°C.

Answers

The amount of heat:
Q = m c ΔT
m = 20 g, c = 4.18 J/g°C, ΔT = 30° - 10° = 20° C
Q = 20 g · 4.18 J/g°C · 20°C = 1672 J
Answer: C ) 1700 J

Answer : The amount of heat is required is, 1672 J

Solution :

Formula used :

$Q= m* c* \Delta T$

$Q= m* c* (T_(final)-T_(initial))$

Q= heat gained

m= mass of the substance = 20 g

c = heat capacity of water = 4.18 J/g ° C

$T_(final)$ = final temperature = $30^oC$

$T_(initial)$ = initial temperature = $10^oC$

Now put all the given values in the above formula, we get the heat required.

$Q= (20g)* (4.18 J/g^oC)* (30-10)^oC$

Q = 1672 Joules

Therefore, the amount of heat is required is, 1672 J

Stars are powered by _____ reactions.
fission
fusion
chemical
electrical

Answers

The star is a ball of hot gasescontaining different kinds of elements at different cores. It has a very hightemperature that radiates all throughout the galaxy. The star has fourmain parts; the core, photosphere, chromospheres and corona. The outer core ofa star located at the chromospheres contains mostly of hydrogen. Inside the hydrogenis helium then carbon, oxygen, neon, magnesium silicon and the inert gas. When astar releases energy it is due to the thermonuclear fusion of hydrogen intohelium. So the answer is fusion.

the answer is fusion

Help!!!!1. A material that can be hit without shattering is?
viscous, flammable, hard, malleable
2. At room temp., a substance with a melting point of 40% C is a?
solid, liquid, gas, mixture
3. what action involves a chemical change?
making ice cubes,adding sugar to tea, cutting wrapping paper, baking a cake
4.a substance that has a little tendency to change into other substance is said to have low?
reactivity, viscosity, density, conductivity
5. formation of a precipitate is usually evidence of?
the separation of a mixture, a chemical change, formation of a mixture, physical change

Answers

1. For the first one if it doesn't shatter then it is hard.
2. We sould consider that room temperature is usually from 18°C (64°F) to 23°C (73°F) and since the melting point of the substance is 40˚C the substance is liquid, because is melting point not an evaporation point it just melts from solid to liquid.
3. Well, in this one we have to consider that a chemical change it change the thing completely. So in this case is baking a cake because the products make the cake stop being them self and created something else.
4. It tends to have low reactivity. This is because viscosity means something like honey very sticky , density is how hard it is and lastly the conductivity I would believe is to pass electricity or current.
5. It is a physical change because the evaporated water transforms again into water and then fall as rain, snow or ice.
Hope it helped <3

The portion of a light ray that falls on a surface is a/an A. reflected ray.
B. diffuse reflection.
C. specular reflection.
D. incident ray.

Answers

So we want to know what is a light ray that falls on a surface. The incident ray that fallls on a surface can then fe reflected, refracted or transmitted. The angle in which the incident ray is must be the same as the angle of a refracted light ray. So the correct answer is D.

d. incident ray, i just took the test yesterday

NEED ASAP PLEASE !! Billy drops a water balloon from the roof of his house. Since the balloon began with an original velocity of zero, how far above ground was the balloon dropped if it took 2.5 seconds to hit the ground?

A. 30.6 m
B. 122.5 m
C. 12.3 m
D. 49.0 m