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3 years ago

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How large is the Milky Way Galaxy? A. It is the largest galaxy ever observed. B. It takes up over half of the known universe. C.

It cannot be measured or compared. D. It is very small when compared to the universe

1 answer:

lisabon 2012 [21]3 years ago

4 0

Answer:

D. It is very small when compared to the universe

Explanation:

The Milky Way can be regarded galaxy which has Solar System in it. Milky way gives the description of appearance of galaxy from Earth, it is a hazy band of light that's been formed from the stars which can be visualized in the sky during the night, though it cannot be sorted by mere human eyes. Milky Way has existed for about 13.51 billion years with the radius of 52,850 light years. the Number of stars in milky way is about 100-400 billion. It should be noted that themilky way galaxy is a very large galaxy but It is very small when compared to the universe

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Liz puts a 1 kg weight and a 10 kg on identical sleds. She then applies a 10N force to each sled. Describe why the smaller weigh

elena-14-01-66 [18.8K]

the correct answer is D- Acceleration depends indirectly on the mass.

According to Newton's second law, the force F, the mass m and the acceleration a are related as follows:

$F=ma$

Therefore,

$a=\frac{F}{m}$

The acceleration <em>a₁ </em>of the mass<em> m₁ =1 kg</em> is given by,

$a_1=\frac{F}{m_1} \\ =\frac{10N}{1kg} \\ =10m/s^2$

The acceleration <em>a₂ </em>of the mass <em>m₂=10 kg</em> is given by,

$a_2=\frac{10N}{10kg} \\ =1m/s^2$

The smaller mass has greater acceleration.

Thus, when the force applied on two bodies of different masses remains constant, then,

$a\alpha \frac{1}{m}$

Acceleration is inversely proportional to the mass of the body.

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3 years ago

Read 2 more answers

a string of fifty 15 ohm christmas tree lights are connected in series. one burns out, they all burn out. calculate the total re

sesenic [268]

Answer:

The total resistance is 750 [ohm]

Explanation:

To solve this problem we must remember that when we have resistors connected in series, these are added each by the resistance value, in this way we have:

Rt = 15 * 50 = 750 [ohm]

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3 years ago

An object accelerates 2.0 m/s2 when a force of 12.0 newtons is applied to it. What is the mass of the object?

julia-pushkina [17]

Answer: 6kg

Explanation:

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3 years ago

A roulette wheel with a 1.0m radius reaches a maximum angular speed of 18 rad/s before it stops 35 revolutions ( 220 rad ) after

Alex17521 [72]

Max ang. speed(u) = 18 rad/s
final ang. speed(v) = 0
ang. displacement(s) = 220 rad

ang. acceleration = (v^2 - u^2)/2s = -18^2 / 2*220 = -0.7364 rad/s^2

v = u +at
0 = 18 - 0.7364t
t = 18/0.7364
t = 24.44 seconds

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3 years ago

A curent-carrying 2.0-cm long segment of wire is inside a long solenoid adius - 40 cm - 800 turns/m, current - 50 mA). The wire

klasskru [66]

Answer:

The value is $F_{max} = 12 \muN$

Explanation:

From the question we are told that

The length is $l = 2.0 \ cm = 0.02 \ m$

The radius of the the solenoid is $r =40 \ cm$

The number of turns per meter is $N = 800 \ turns / m$

The current through the solenoid is $I = 50 \ mA = 50*10^{-3} \ A$

The current through the segment is $I_s = 12 \ A$

Generally the magnetic force is mathematically represented as

$F = B * I_s l sin(\theta)$

At maximum $\theta = 90^o$

So

$F_{max} = B * I_s l$

Here B is the magnetic field is mathematically represented as

$B = \mu_o * N * I$

Here $\mu_o$ is the permeability of free space with value

$\mu_o = 4\pi * 10^{-7} N/A^2$

So

$B = 4\pi * 10^{-7} * 800 *50*10^{-3}$

=> $B = 5.0272 *10^{-5} \ T$

So

$F_{max} = 5.0272 *10^{-5} * 12 * 0.02$

$F_{max} = 1.2 *10^{-5}$

$F_{max} = 12 \muN$

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3 years ago