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3 years ago

Question 2 (ID=81813)

Physics

2 answers:

zaharov [31]3 years ago

7 0

Answer:

The answer is B

Explanation:

5/2=2.5

2.5x2=5

Hope this helps ik its kinda confusing lol

DerKrebs [107]3 years ago

5 0

B is the correct one

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The less mass an object has, the --- its gravitational f

BaLLatris [955]

Answer:

The less mass an object has, the less its gravitational [force.]

Explanation:

Newton's Law of Gravity states that $F_G=\frac{Gm_1m_2}{r^{2}}$ . The two m values are the objects' masses, G is the gravitational constant, and r is the distance between the objects' centers. Notice how the mass values are in the fraction's numerator? That means increasing the mass of one or both objects increases $F_G$ . That also implies the inverse; decreasing the mass of one or both objects decreases $F_G$ !

I hope this helps you understand this concept a little more! Have yourself a fantastic day, 'kay?

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3 years ago

The efficiency of a carnot cycle is 1/6. If on reducing the temperature of the sink 75 degree Celsius, the efficiency becomes 1/

svp [43]

Answer:

375 and 450

Explanation:

The computation of the initial and the final temperature is shown below:

In condition 1:

The efficiency of a Carnot cycle is $\frac{1}{6}$

So, the equation is

$\frac{1}{6} = 1 - \frac{T_2}{T_1}$

For condition 2:

Now if the temperature is reduced by 75 degrees So, the efficiency is $\frac{1}{3}$

Therefore the next equation is

$\frac{1}{3} = 1 - \frac{T_2 - 75}{T_1}$

Now solve both the equations

solve equations (1) and (2)

$2(1 - T_2/T_1) = 1 - (T_2 - 75)/T_1\\\\2 - 1 = 2T_2/T_1 - (T_2 - 75)/T_1\\\\ = (T_2 + 75)/T_1T_1 = T_2 + 75\\\Now\ we\ will\ Put\ the\ values\ into\ equation (1)\\\\1/6 = 1 - T_2/(T_2 + 75)\\\\1/6 = (75)/(T_2 + 75)$

T_2 + 450 = 75

T_2 = 375

Now put the T_2 value in any of the above equation

i.e

T_1 = T_2 + 75

T_1 = 375 + 75

= 450

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4 years ago

The diagram below shows a light ray from a pencil hitting a mirror.

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Answer:

Explanation:

Its 1 since the shape of it is more downwards which results the reflection going downwards.

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3 years ago

Read 2 more answers

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viva [34]

Answer:

Janna levin is a cosmologist and professor at physics.

She is an american by race

She was the presenter of Nova feature Black hole Apocalypse and has writtenany science non-fiction books

www.jannalevin.com is her own page where u get her correct info and bio

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4 years ago

Many types of decorative lights are connected in parallel. If a set of lights is connected to a 110 V source and the filament of

Oksi-84 [34.3K]

Answer:

i₀ = V / R_i

Explanation:

For this exercise we use Ohm's law

V = i R

i = V / R

the equivalent resistance for

$\frac{1}{R_{eq}}$ = ∑ $\frac{1}{R_i}$

if all the bulbs have the same resistance, there are N bulbs

$\frac{1}{ R_{eq}} = \frac{N}{R_i}$

R_{eq} = R_i / N

we substitute

i = N V / Ri

where i is the total current that passes through the parallel, the current in a branch is

i₀ = i / N

i₀ = V / R_i

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3 years ago