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3 years ago

A person on a merry-go-round makes a complete revolution in about 3.17 s.

Physics

1 answer:

GREYUIT [131]3 years ago

8 0

Answer:

second one

Explanation:

HOPE THIS helps

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What is accerlation due to gravity??

mezya [45]

Answer:

When an object falls, gravity pulls the object towards the ground and causes the object to accelerate by 9.8m/s each second. Regardless of mass, every object accelerates at the same rate (9.8m/s) when dropped unless there´s air resistance.

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3 years ago

If an object of 3.5 cm heitght is kept at a distance of 12 cm from the convex lens of focal length 8 cm. Find the position,natur

jeka94

Answer: The image is at a distance of 24 cm on the right of the lens, it will be an inverted, real image and has a height of 7 cm.

Explanation: To determine the position of the image of the object, use the Lens Equation, which is described by:

$\frac{1}{f} = \frac{1}{u} +\frac{1}{v}$

where

f is focal length;

u is distance of the object from the lens;

v is distance of the image of the pbject from the lens;

Calculating the position of the image will be:

$\frac{1}{v} =\frac{1}{f} - \frac{1}{u}$

$\frac{1}{v} = \frac{1}{8} - \frac{1}{12}$

$\frac{1}{v} = \frac{1}{24}$

v = 24 cm

Note that the distance of the image from the lens is positive. This means that the formed image is positioned at the right of the lens and is inverted.

For the height of the image, it can be used the Magnification (M) of an image:

M = $\frac{h_{i}}{h_{o}} = \frac{v}{u}$

where:

$h_{i}$ is the height of the image

$h_{o}$ is the height of the object

For this image:

$\frac{h_{i}}{3.5} = \frac{24}{12}$

$h_{i} =$ 2 * 3.5

$h_{i}$ = 7 cm

The image formed for this lens is 24 cm on the right of the lens, inverted related to the object and has height of 7 cm.

7 0

3 years ago

A van traveling down a slope with a uniform acceleration of 2.15 meters/second2 attains a speed of 20.00 meters/second after 7.0

jeka94

-- While gaining 2.15 m/s more speed every second, the van
would gain (2.15 x 7) = 15.05 m/s more speed in 7 seconds.

-- We're told that its speed at the end of the 7 seconds
is 20 m/s .

-- So its speed at the beginning of the 7 seconds must have been

(20 m/s - 15.05 m/s) = 4.95 m/s .

8 0

3 years ago

Read 2 more answers

A boy,pushes on a wagon so that it accelerate at a rate 0.50 ms2 the wagon has a mas of 24 kg what is the magnitude of the boys

Lynna [10]

Strength = mass x acceleration

S = 24 x 0,5

S = 12 N

5 0

3 years ago

ARRANGE THE STEPS IN ORDER TO DESCRIBE WHAT HAPPENS TO A GAS WHEN IT COOLS

vredina [299]

What happens to has when it cools is ...
Step 1) They will start to form liquids, like condensation.
Step 2) As liquids cool, they will turn into solids.
Step 3) As solids cool, they become more stable and solid.

3 0

3 years ago