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3 years ago

What is science? Science is observable, testable, replicable, reliable and flexible.

Physics

1 answer:

Ilia_Sergeevich [38]3 years ago

3 0

Answer:

Yes, the answer to the question is correct

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A 24.8 tall object is placed in front of a lens, which creates a -3.09 cm tall image. What is the magnification?

OleMash [197]

Answer: 0.125

Explanation:

Given that the

Object height U = 24.8 cm

Image height V = 3.09 cm

Magnification M is the ratio of the image height to the object height. That is, divide the given image height by the given object height.

M = V/U

Substitute V and U into the formula above.

M = 3.09/24.8

M = 0.125

Magnification is therefore equal to 0.125 approximately

6 0

3 years ago

How much does the Earth weigh? Have an AWESOME day -NaomiTheGenuis

babymother [125]

Answer:

The Earth weighs about:
13,170,000,000,000,000,000,000,000 pounds

or

5.97 billion trillion metric tons

Explanation:

Have a great rest of your day
#TheWizzer

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2 years ago

Read 2 more answers

Please do parts (a) and part (b) below and include diagrams where applicable:

Harlamova29_29 [7]

Answer:

Part a)

m = 232.1 gram

Part b)

M = 928.6 gram

Explanation:

Part a)

As we know that frequency of vibration for a given spring block system is given by formula

$f = \frac{1}{2\pi}\sqrt{\frac{k}{m}}$

so if it is given as 0.90 Hz then we will have

$0.90Hz = \frac{1}{2\pi}\sqrt{\frac{k}{m}}$

Now if additional mass is attached with it the frequency changed to 0.50 Hz

$0.50 Hz = \frac{1}{2\pi}\sqrt{\frac{k}{m + 520}}$

now divide two equations

$\frac{0.90}{0.50} = \sqrt{\frac{m + 520}{m}}$

$3.24m = m + 520$

$m = 232.1 g$

Part b)

Now the frequency is changed to 0.45 Hz

so again we will have

$0.45 Hz = \frac{1}{2\pi}\sqrt{\frac{k}{M}}$

again divide it with first equation above

$\frac{0.90}{0.45} = \sqrt{\frac{M}{m}}$

as we know that m = 232.1 g

so total mass needed for 0.45 Hz will be

$M = 928.6 gram$

7 0

3 years ago

A projectile is launched straight upward at 50 m/s. Neglecting air resistance its speed upon returning to its starting point is:

lbvjy [14]

Answer:

The speed of the projectile upon returning to its starting point is 50 m/s.

Explanation:

Given;

initial velocity of the projectile, u = 50 m/s

The velocity of the projectile is maximum before hitting the ground. As the object moves upward, the velocity reduces as it approaches the maximum height, at the maximum height the velocity becomes zero. Also, as the object moves downward, the velocity starts to increase and becomes maximum before hitting the ground.

Therefore, the speed of the projectile upon returning to its starting point is 50 m/s.

4 0

3 years ago

In egypt, the physiologic density is ______ greater than the arithmetic density [estimate value], because _______ [reason for di

topjm [15]

In Egypt, the physiologic density is 2580 persons per square kilometer greater than the arithmetic density which is 75, because most of the country's land is not suitable for agriculture.
The land which is suitable for agriculture is called arable land. when physiological density is larger than arithmetic density it means country less arable land.

4 0

3 years ago