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3 years ago

A converging lens can be defined as __________

Physics

1 answer:

Kobotan [32]3 years ago

3 0

Answer:

a lens that causes parallel light rays to separate from each other

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An asteroid is discovered in a nearly circular orbit around the Sun, with an orbital radius that is 3.570 times Earth's. What is

inysia [295]

Explanation:

Given:

$r_a = 3.570R_E$

$R_E = 1.499×10^{11}\:\text{m}$

$M_S = 1.989×10^{30}\:\text{kg}$

$G = 6.674×10^{-11}\:\text{N-m}^2\text{/kg}^2$

Let $m_s$ = mass of the asteroid and $r_a$ = orbital radius of the asteroid around the sun. The centripetal force $F_c$ is equal to the gravitational force $F_G:$

$F_c = F_G \Rightarrow m_a\dfrac{v_a^2}{r_a} = G\dfrac{m_aM_S}{r_a^2}$

$\dfrac{4\pi^2 r_a}{T^2} = G\dfrac{M_S}{r_a^2}$

where

$v = \dfrac{2\pi r_a}{T}$

with T = period of orbit. Rearranging the variables, we get

$T^2 = \dfrac{4\pi^2 r_a^3}{GM_S}$

Taking the square root,

$T = 2\pi \sqrt{\dfrac{r_a^3}{GM_S}}$

$\:\:\:\:=2\pi \sqrt{\dfrac{(3.57(1.499×10^{11}\:\text{m}))^3}{(6.674×10^{-11}\:\text{N-m}^2\text{/kg}^2)(1.989×10^{30}\:\text{kg})}}$

$\:\:\:\:= 2.13×10^8\:\text{s} = 6.75\:\text{years}$

3 0

3 years ago

Which vocabulary word would describe both a cell membrane and a screen door?

suter [353]

Answer:

flexible covering

Explanation:

5 0

3 years ago

4. In which of the following circuits will the bulb glow?

Zanzabum

Answer:

I believe is C.

Explanation:

its quite obvious:)

4 0

3 years ago

60 POINTS ANSWER CORRECTLY

ohaa [14]

Answer:

C ) 1.53

Explanation:

The critical angle of a material is given by the formula

$sin c = \frac{1}{n}$

where

c is the critical angle

n is the refractive index

This formula is valid if the second medium is air (which is the case of the problem).

In this problem, we know the critical angle:

$c=40.8^{\circ}$

Therefore we can rearrange the equation to find the refractive index:

$n=\frac{1}{sin c}=\frac{1}{sin 40.8^{\circ}}=1.53$

5 0

4 years ago

Read 2 more answers

By how much does the pressure of a gas in a rigid vessel decrease when the temperature drops from 0 ∘C to –1∘C?

Ugo [173]

When a problem says a rigid vessel, it means that volume is constant. At constant V, pressure and temperature are indirectly proportional. We calculate as follows:

P1/T1 = P2/T2
P1/P2 = T1/T2
P1/P2 = 273.15 / 272.15
P1/P2 = 1.00

Hope this helps. Have a nice day.

7 0

4 years ago