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4 years ago

White dwarfs are too small to see with telescopes true or false

Physics

1 answer:

trasher [3.6K]4 years ago

5 0

Answer:

False

Explanation:

A white dwarf star that is easy to locate and see with small telescopes.

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Sarah is hanging a 1.5 -kg picture on the wall. She holds it in place with a horizontal force while she checks to see if it is p

NNADVOKAT [17]

Answer:

24.5 N

Explanation:

Draw a free body diagram of the picture. There are four forces:

Weight force mg pulling down.

Friction force Nμ pushing up.

Normal force N pushing left.

Applied force F pushing right.

Sum of the forces in the y direction:

∑F = ma

Nμ − mg = 0

N = mg / μ

Sum of the forces in the x direction:

∑F = ma

F − N = 0

F = N

Substitute and solve:

F = mg / μ

F = (1.5 kg) (9.8 m/s²) / (0.6)

F = 24.5 N

4 0

3 years ago

If a child pulls a sled through the snow on a level path with a force of 80 N exerted at an angle of 44° above the horizontal, f

Ilya [14]

Answer:

Horizontal component of force = $57.5N$

Vertical component of force= $55.6N$

Explanation:

We are given that

Force=80 N

$\theta=44^{\circ}$

We have to find the horizontal and vertical components of the force.

We know that

Horizontal component of force= $Fcos\theta$

Vertical component of force= $Fsin\theta$

Using the formula

Horizontal component of force = $80cos44^{\circ}$

Horizontal component of force = $57.5N$

Vertical component of force= $80sin44^{\circ}$

Vertical component of force= $55.6N$

7 0

3 years ago

At a given point in its orbit, the moon is 2.4 x 10^5 miles from earth. How long does it take light from a source on earth to re

Mice21 [21]

Answer:

Total time= 2.56 s

Explanation:

Given that

$Distance = 2.4\times 10^5\ miles$

So distance = 386242560 m

Velocity of light

$C= 3\times 10^8\ m/s$

We know that

Distance = velocity x time

Now by putting then values

$time=\frac{386242560}{3\times 10^8}$

t=1.28 s

So the total time = 2 x 1.28

total time= 2.56 s

8 0

4 years ago

Read 2 more answers

What is kinematics????

My name is Ann [436]

Answer:

the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion is called kinematics.

6 0

3 years ago

Read 2 more answers

A linebacker strikes a fullback with full force in a football game.The reaction force to the force of the linebacker striking th

Scrat [10]

A. the back falls backwards to the ground

6 0

3 years ago