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brilliants [131]

2 years ago

11

A 1700 kg car is moving with a velocity of 20 m/s and stops.

1 answer:

vladimir2022 [97]2 years ago

3 0

Answer:

700

Explanation:

777770000089_(4(?!

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An atom has an atomic number 17 and atomic mass number 35. How many neutrons are present in its nucleus?

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The number of <span>neutrons that are present in its nucleus is 18. The correct option among all the options that are given in the question is the second option or option "B". Mass number minus the atomic number gives the number of neutrons. I hope that this is the answer that has come to your help.</span>

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2 years ago

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In the year 2081 in a shipping port on the moon, workers for Ore-Space, Inc., hoist a 500.0 kg hunk of anorthosite moon rock by

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What is the correct explanation of Newton's Third Law of Motion?

viva [34]

Answer:

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an object is placed 20cm from a converging lens. If the real image is formed 80cm from the object, what is the focal length of t

masya89 [10]

Explanation:

Here,

object distance(u)=20cm

image distance(v)=80cm-20cm=60cm

focal length(f)=?

we know ,

(1/f)=(1/v)+(1/u)

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8 0

1 year ago

The rope of a swing is 3.10 m long. Calculate the angle from the vertical at which a 76.0 kg man must begin to swing in order to

kakasveta [241]

Answer:

The angle from the vertical is 48.72°

Explanation:

Given :

Length of rope $l = 3.10$ m

Mass of man $m = 76$ Kg

Mass of car $M = 1520$ Kg

Velocity of car $v = 1.01$ $\frac{m}{s}$

According to conservation law,

Potential energy of man is converted to kinetic energy of car moving,

$\frac{1}{2} M v^{2} = mgh$

We calculate height,

$h = \frac{M v^{2} }{2mg}$

$h = \frac{1520(1.01)^{2} }{2\times 75 \times 9.8}$ ( ∵ $g = 9.8 \frac{m}{s^{2} }$ )

$h = 1.05$ m

This is the distance of the rope at the bottom,

So we take difference of it.

⇒ $3.10 - 1.05 = 2.05$

We can calculate angle between them,

$\cos \theta = \frac{2.05}{3.10} = 0.6597$

$\theta =$ 48.72°

Therefore, the angle from the vertical is 48.72°

8 0

2 years ago