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3 years ago

What is a lunar eclipse?

2 answers:

7 0

Moon eclipse is when the moon interposes between the sun and behind the Earth. The moon passes behind the Earth into its umbra and not viceversa! This is possible when the three of them are ALIGNED (in syzygy). In Romania, there was such eclipse that could be seen at an October night last year.

Vanyuwa [196]3 years ago

5 0

A lunar eclipse is basically when the earth passes between the moon and sun, causing the moon to appear darkened. Also, unlike the solar eclipse, the lunar eclipse occurs during the day.

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What information does a free-body diagram show?

Anna11 [10]

Free-body diagrams are diagrams used to show the relative magnitude and direction of all forces acting upon an object in a given situation. A free-body diagram is a special example of the vector diagrams

7 0

4 years ago

Read 2 more answers

A rotating merry-go-round makes one complete revolution in 4.0s a) what is the linear speed of a child seated 1.2 meters from th

lianna [129]

Answer:a) The linear speed of the rotating merry-go-round is 1.884 m/s.

b) The acceleration of the rotating merry-go-round device is $2.95m/s^2$ .

Explanation:

a) linear speed of the device:

Distance = $2\pi (r)$

Child seated 1.2 meters from the center, which means that radius ,r = 1.2 meters

Time taken to complete one revolution = 4.0 seconds

$\text{Linear speed}=v=\frac{distance}{time}=\frac{2\pi r}{t}=\frac{2\times 3.14\times 1.2 m}{4.0 s}=\frac{7.536 m}{4.0 s}=1.884 m/s$

The linear speed of the rotating merry-go-round is 1.884 m/s.

b) Acceleration

Linear velocity ,v = 1.884 m/s

$a_c=\frac{v^2}{r}$

$=\frac{1.884 m/s\times 1.884m/s}{1.2 m}=2.95m/s^2$

The acceleration of the rotating merry-go-round device is $2.95m/s^2$ .

7 0

4 years ago

1. A stone is thrown upwards with an initial velocity of 25 m/s at angle of 30° to the ground a. Show that the vertical componen

Lana71 [14]

Answer:

sin 30° = $\frac{v_{y} }{25}$

Multiply each side by 25 to cancel the 25 under $v_{y}$

(25)· sin 30° = $v_{y}$

Multiply everything on the left side.

12.5 $\frac{m}{s}$ = vertical velocity component.

I attached a picture, I hope it helps.

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3 years ago

Which of the following is not a benefit of improved cardio-respiratory fitness?

8_murik_8 [283]

Reduced HDL cholesterol

4 0

3 years ago

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What is work - energy theorem ??

Elden [556K]

The work-energy theorem explains the idea that the net work - the total work done by all the forces combined - done on an object is equal to the change in the kinetic energy of the object. After the net force is removed (no more work is being done) the object's total energy is altered as a result of the work that was done.

This idea is expressed in the following equation:

is the total work done

is the change in kinetic energy

is the final kinetic energy

is the initial kinetic energy

mark me as brainliest ❤️

3 0

3 years ago

Read 2 more answers