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3 years ago

1. State Newton's third law of motion and write any three applications of it

2 answers:

8 0

Newton's Third law: when object A exerts force on object B, object B simultaneously exert oppositely directed force of equal magnitude on object A.

1)When a bullet is fired from the gun with a certain force (action) as a reaction an equal and opposite force is exerted on the gun.

2)when you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air.

Scrat [10]3 years ago

4 0

Answer:

1)When a bullet is fired from the gun with a certain force (action) as a reaction an equal and opposite force is exerted on the gun. 2)when you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air.

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The weight of a body above sea level varies inversely with the square of the distance from the center of Earth. If a woman weigh

Serjik [45]

Answer:

89.16pounds

Explanation:

The equation that defines this problem is as follows

W=k/X^2

where

W=Weight

K= proportionality constant

X=distance from the center of Earth

first we must find the constant of proportionality, with the first part of the problem

k=WX^2=131x3960^2=2054289600pounds x miles^2

then we use the equation to calculate the woman's weight with the new distance

W=2054289600/(4800)^2=89.16pounds

4 0

3 years ago

A soccer ball with a mass of 0.434 kg approaches a player horizontally with a speed of 13.0 m/s. The player kicks the ball with

zaharov [31]

Answer:

a) 15.49

b) Opposite to the ball's initial velocity

c) 258.16N

Explanation:

$\Delta p=m \Delta v\\\\\Delta p= (0.434)(13.0-(-22.7)) \\\\\Delta p=(0.434)(35.7)\approx 15.49 kg \cdot m/s$

Since the player is kicking the ball in the opposite direction to which it came, the impulse is being directed opposite to the ball's initial velocity.

$\Delta p= F \Delta t \\\\\\F=\dfrac{\Delta p}{\Delta t} \\\\\\F=\dfrac{15.49 kg \cdot m/s}{0.06 s}\approx 258.16N$

Hope this helps!

7 0

3 years ago

How can we search for evidence that other planets were once habitable?

Slav-nsk [51]

Answer:

Hey

Good question

How can we know if I planet was once inhabited by life? There diferent tequnecs for this. The first would be searching in the soil for fossilized microbes. in June of 19, 1976 Viking 1 was launched on its way to mars to began the search of life els wear. What this little lab did was drill a hole in the marsion terrain and take a sample of its soil to search for microbes or microbe fosles. Sadly it did not find anything. Other technics are to search for ruins on the planet or exoplanet. I do not have much to say about this method because it has never been used.

Hope it helped (i wrote all that).

Spiky Bob your answerer

Below is a picture of Carl Sagan next to the Viking Voyager 1. Obveosly this is just a modal. you could not breathe on mars.

4 0

3 years ago

A small metal sphere weighs .28 N in air and has a volume of13

Ray Of Light [21]

To solve this problem we will start by considering how to calculate the apparent weight. On the sphere this will then be given that the real weight is the sum of the apparent weight and the Buoyant Force. Therefore we will have to

$W_T = W_A + F_B$

Here

$W_T$ = True Weight

$W_A$ = Apparent Weight

$F_B$ = Buoyant Force

If we seek to find the apparent weight we will have to,

$W_A = W_T-F_B$

$W_A = 0.28N - V\rho g$

Remember that

V = Volume (Volume Sphere)

$\rho$ = Density (At this case water density)

g = Gravitational acceleration

$W_A = 0.28N - (13*10^{-6}m^3)(1000kg/m^3)(9.8)$

$W_A = 0.1526N$

Therefore the apparent weight will be 0.1526N

5 0

4 years ago

Star-forming clouds appear dark in visible-light photos because the light of stars behind them is absorbed by __________.

Ostrovityanka [42]

Answer:

Interstellar Dust

Explanation:

In the solar system Interstellar dust is a type of cosmic dust and unlike Interstellar gas they have large dust particles enabling them to block visible light. Unlike smoke and fog, they contain large number of closely packed clumps of atoms and molecules

7 0

3 years ago

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1. State Newton's third law of motion and write any three applications of it​

1. State Newton's third law of motion and write any three applications of it