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3 years ago

Why is the study of black holes important?

1 answer:

7 0

It's important because first, we might be able to understand further with how gravity works. And if we can harness the power that black hole possesses, which pulls everything in, then we might be able to use that power for a huge amount of energy, thus possibly replacing solar energy, fossil fuels, etc.,.

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What is the angle θ in the triangle below? (Hint: Use an inverse trigonometric function.)

Andrej [43]

Answer

The correct answer is B

Explanation

The side length opposite to the angle $\theta$ has length $3$ units.

The length of the hypotenuse is $8$ units.

We use the trigonometric ratio that involves the length of the opposite side and the hypotenuse, which is

$\sin\theta=\frac{Opposite}{Hypotenuse}$

$\sin\theta=\frac{3}{8}$

This is the same as,

$\sin\theta=0.375$

We take the sine inverse to obtain,

$\theta=\sin^{-1}(0.375)$

This evaluates to

$\theta=22.024$

Therefore the value of the angle $\theta$ is $22.0\degree$ to the nearest tenth

5 0

3 years ago

Distance= 10km due West in 1hour calculate the velocity

Rus_ich [418]

Answer:

Velocity = distance / time

V = 10/1

V = 10km/h

6 0

3 years ago

Read 2 more answers

How does reflection differ from refraction and diffraction?

Otrada [13]

Reflection, it is the phenomena of getting back the light you've shown from a light source with the same angle. refraction, It is the phenomena of bending of light when it changes it medium. This can rarer to denser or denser to rarer. diffraction, It is the phenomena of bending of light near the edges of the object. hope this helps

5 0

3 years ago

11. A vector M is 15.0 cm long and makes an angle of 20° CCW from x axis and another vector N is 8.0 cm long and makes an angle

Alja [10]

Answer:

The magnitude of the resultant vector is 22.66 cm and it has a direction of 29.33°

Explanation:

To find the resultant vector, you first calculate x and y components of the two vectors M and N. The components of the vectors are calculated by using cos and sin function.

For M vector you obtain:

$M=M_x\hat{i}+M_y\hat{j}\\\\M=15.0cm\ cos(20\°)\hat{i}+15.0cm\ sin(20\°)\hat{j}\\\\M=14.09cm\ \hat{i}+5.13\ \hat{j}$