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4 years ago

10

A light-year is about?

1 answer:

denis-greek [22]4 years ago

7 0

13 year old and the light year mean cell of moucles that can use simple year light diffusion

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At what wavelength does Io reflect the most sunlight? A. Blue

sineoko [7]

Answer:

B. Ultraviolet.

Explanation:

Io is the fourth smallest moon in the Galilean moons and it is the innermost moon out of the other three moon. It has the highest density as compare to the moon and it has lowest water at its surface.

While it is Jupiter moon it leaves a footprint of magnet over the Jupiter's upper atmosphere. The appearance of this moon look like as a spot of ultraviolet emission that remains fixed underneath Io as Jupiter rotates. So it reflects Ultraviolet radiations.

5 0

3 years ago

Para que ángulo el alcance es igual a la altura máxima en un lanzamiento de proyectil ideal sobre un plano horizontal. Translati

Gemiola [76]

Answer:

<h2>76°</h2>

Explanation:

In projectile,

Maximum height = $\frac{u^{2}sin^{2} \theta }{2g}$ and range = $\frac{u^{2}sin2\theta }{g}$

u = velocity of the body

$\theta$ = angle of launch

g = acceleration due to gravity

If the range equals the maximum height in an ideal projectile launch on a horizontal plane, this means;

$\frac{u^{2}sin^{2} \theta }{2g} = \frac{u^{2}sin2\theta }{g}$

since $sin2\theta = 2sin\theta cos\theta$

$\frac{u^{2}sin^{2} \theta }{2g} = \frac{u^{2}2sin\theta cos\theta }{g}\\\frac{sin\theta}{2} =2cos\theta \\sin\theta = 4cos\theta\\\frac{sin\theta}{cos\theta} = 4\\tan\theta = 4\\\theta = tan^{-1} \\4\theta = 75.9^{0}$

The angle at which the range equals the maximum height in an ideal projectile launch on a horizontal plane is approximately 76°

8 0

4 years ago

What is the magnitude of velocity for a 2,000 kg car possessing 3,000 kg(*)m/s of momentum?

Trava [24]

The magnitude of velocity for this car is equal to 1.5 m/s.

<u>Given the following data:</u>

Momentum of car = 3,000 kgm/s.

Mass of car = 2,000 kg.

To calculate the magnitude of velocity for this car:

<h3>What is momentum?</h3>

In Science, momentum simply means a multiplication of the mass of an object and its velocity.

Mathematically, momentum is giving by the formula;

$Momentum = mass \times velocity$

Making velocity the subject of formula, we have:

$Velocity=\frac{Momentum}{Mass}$

Substituting the given parameters into the formula, we have;

$Velocity=\frac{3000}{2000}$

Velocity = 1.5 m/s.

Read more on momentum here: brainly.com/question/15517471

5 0

3 years ago

Predict how the wavelength of waves traveling with the same speed would change if the frequency of the waves increases?

postnew [5]

The wavelength would decrease because frequency is inversly proportional to the wavelength provided the speed is constant: f=v/λ

6 0

3 years ago

A CD is spinning on a CD player. In 12 radians, the cd has reached an angular speed of 17 r a d s by accelerating with a constan

mote1985 [20]

Answer:

The initial angular speed of the CD is equal to 14.73 rad/s.

Explanation:

Given that,

Angular displacement, $\theta=12\ rad$

Final angular speed, $\omega_f=17\ rad/s$

The acceleration of the CD, $\alpha =3\ rad/s^2$

We need to find the initial angular speed of the CD. Using third equation of kinematics to find it such that,

$\omega_f^2=\omega_i^2+2\alpha \theta\\\\\omega_i^2=\omega_f^2-2\alpha \theta$

Put all the values,

$\omega_i^2=(17)^2-2\times 3\times 12\\\\\omega_i=\sqrt{217}\\\\\omega_i=14.73\ rad/s$

So, the initial angular speed of the CD is equal to 14.73 rad/s.

3 0

3 years ago