All categories

4 years ago

Consider the earth-moon system, the solar system, the galaxy and the universe. which is largest?

1 answer:

8 0

I'd suppose that the universe is largest, considering that it contains earth-moon system, the solar system, AND hundreds of thousands of galaxies

You might be interested in

A 20.0-kg traffic light hangs midway on a cable between two poles 30.0 meters apart. If the sag in the cable is 0.40 meters, wha

hammer [34]

Answer:

the tension in each side of the cable is 3677.57 N

Explanation:

given data

traffic light = 20 kg

cable between two poles = 30 m

sag in the cable = 0.40 m

solution

by the free body diagram

tan θ = $\frac{0.4}{15}$ .............1

θ = 1.527 °

and

tension = mg

The net force is along x - axis is express as

T2 cosθ = T1 cosθ .................2

so T2 - T1 ..............3

and

when we take it along y axis that is express as

( T1 + T2) sinθ = mg ...................4

so by equation 3 we put here

2 × T1 sin(1.527) = 20 × 9.8

T1 = 3677.57 N

7 0

4 years ago

Se pune<br>Numerical problems<br>Convert 100ºC to Kelvin scale

IgorC [24]

Answer:

373 K

Explanation:

To convert from °C to kelvin, you add the value to 273

Therefore,

100°C = (100+273)K

= 373K

5 0

4 years ago

The moment of inertia of a thin ring of mass M and radius R about its symmetry axis is ICM = MR2.

monitta

Answer:

The moment of inertia of large ring is 2MR².

(A) is correct option.

Explanation:

Given that,

Mass of ring = M

Radius of ring = R

Moment of inertia of a thin ring = MR²

Moment of inertia :

Moment of inertia is the product of the mass of the ring and square of radius of the ring.

We need to calculate the moment of inertia of large ring

Using formula of moment of inertia

$I=I_{cm}+MR^2$

Where, $I_{cm}$ = moment of inertia at center of mass

M = mass of ring

R = radius of ring

Put the value into the formula

$I=MR^2+MR^2$

$I=2MR^2$

Hence, The moment of inertia of large ring is 2MR².

6 0

3 years ago

What is the highest temperature ever recorded on earth

Llana [10]

Therefore the world's record high temperature of 134.0°F (56.7°C) is held by Furnace Creek Ranch in Death Valley, California. That global high temperature was attained on July 10, 1913.

4 0

4 years ago

An astronomer observes a hydrogen line in the spectrum of a star. The wavelength of hydrogen in the laboratory is 6.563 x 10-7m,

Sergio [31]

Answer:

D. The star is approaching Earth.

Explanation:

As we know by the doppler's effect of light that

$\frac{\Delta \nu}{\nu} = \frac{v}{c}$

here we know that

$\Delta \nu$ = change in frequency

here we know that the wavelength of light coming from the star is decreased so the frequency will increase

$\Delta \nu = \frac{c}{\lambda'} - \frac{c}{\lambda}$

$\Delta \nu =(3\times 10^8)(\frac{1}{6.56186 \times 10^{-7}} - \frac{1}{6.563 \times 10^{-7}})$

$\Delta \nu = 7.9414 \times 10^{10} Hz$

now we have

$\frac{7.9414 \times 10^{10}}{\nu} = \frac{v}{c}$

here we know that

$\nu = \frac{3\times 10^8}{6.563 \times 10^{-7}} = 4.57 \times 10^{14} Hz$

now we have

$v = 5.2 \times 10^4 m/s$

So here correct answer is

D. The star is approaching Earth.

8 0

4 years ago