What two factors affect gravity and how?

Answers

Answer 1

Answer: The only things that affect the forces of gravity are ...

-- the product of the masses of the two objects, and

-- the distance between the centers of the two objects.
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-- The strength of the gravitational force is directly proportional to the product of
the two masses. If the product of the two masses is multiplied by ' Q ', then the
strength of the gravitational forces between them is also multiplied by ' Q '.

-- The strength of the gravitational force is inversely proportional to square of
the distance between the centers of the two masses. If the distance between
their centers is multiplied by ' K ', then the strength of the gravitational forces
between them is multiplied by 1/K² .

Answer 2

Answer: The two most common and huge affects are mass and distance. The bigger the harder it is to control gravity and same with distance. The farther you are away, the less pull you have .

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Suppose you increase your walking speed from 6 m/s to 11 m/s in a period of 2 s. What is your acceleration?

What do you think scientists classify blood as a connective tissue?

Answers

Blood is a fluid connective tissue because its found in all the internal organs and its is also connect two or more organs like tissue with heart

What force stops a car from sinking into the road surface?

Answers

Answer:

Explanation:

There are so many factors which works to stop a car from sinking into road surface. One is reaction force other factors are density of material from which the car is made of, mass and shape of car.but the most important force is the reaction force. According to the Newton's 3rd law of motion:- every force have equal force acting in opposite direction.

I believe it's technically referred to as the Normal force.
However I like to think of it as the reaction force, as it is the force that is a result of obeying Newton's 3rd law ("For every action, there is an equal and opposite reaction"). The upward force from the ground is the reaction to the downward force of gravity.

The upward force on an object falling through the air is?

Answers

The thing that pushes the object up while it is falling is air. This force is known as "air resistance".

A train is accelerating at a rate of 2 km/hr/s. If its initial velocity is 20 km/hr, what is its velocity after 30 seconds?

Answers

Here it is. *WARNING* VERY LONG ANSWER

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11) If Galileo had dropped a 5.0 kg cannon ball to the ground from a height of 12 m, the change in PE of the cannon ball would have been product of mass(m),acceleration(g)and height(h)

The change in PE =mgh=5*9.8*12=588 J
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12.) The 2000 Belmont Stakes winner, Commendable, ran the horse race at an average speed = v = 15.98 m/s.

Commendable and jockey Pat Day had a combined mass =M= 550.0 kg,

Their KE as they crossed the line=(1/2)Mv^2

Their KE as they crossed the line=0.5*550*(15.98)^2

Their KE as they crossed the line is 70224.11 J

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13)Brittany is changing the tire of her car on a steep hill of height =H= 20.0 m

She trips and drops the spare tire of mass = m = 10.0 kg,

The tire rolls down the hill with an intial speed = u = 2.00 m/s.

The height of top of the next hill = h = 5.00 m

Initial total mechanical energy =PE+KE=mgH+(1/2)mu^2

Initial total mechanical energy =mgH+(1/2)mu^2

Suppose the final speed at the top of second hill is v

Final total mechanical energy =PE+KE=mgh+(1/2)mv^2

As mechanical energy is conserved,

Final total mechanical energy =Initial total mechanical energy

mgh+(1/2)mv^2=mgH+(1/2)mu^2

v = sq rt [u^2+2g(H-h)]

v = sq rt [4+2*9.8(20-5)]

v = sq rt 298

v =17.2627 m/s

The speed of the tire at the top of the next hill is 17.2627 m/s
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14.) A Mexican jumping bean jumps with the aid of a small worm that lives inside the bean.

a.)The mass of bean = m = 2.0 g

Height up to which the been jumps = h = 1.0 cm from hand

Potential energy gained in reaching its highest point= mgh=1.96*10^-4 J or 1960 erg

b.) The speed as the bean lands back in the palm of your hand =v=sq rt2gh =sqrt 0.196 =0.4427 m/s or 44.27 cm/s
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15.) A 500.-kg horse is standing at the top of a muddy hill on a rainy day. The hill is 100.0 m long with a vertical drop of 30.0 m. The pig slips and begins to slide down the hill.

The pig's speed a the bottom of the hill = sq rt 2gh = sq rt 2*9.8*30 =sq rt 588 =24.249 m/s
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16.) While on the moon, the Apollo astronauts Neil Armstrong jumped up with an intitial speed 'u'of 1.51 m/s to a height 'h' of 0.700 m,

The gravitational acceleration he experienced = u^2/2h = 2.2801 /(2*0.7) = 1.629 m/s^2
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EDIT
1.) A train is accelerating at a rate = a = 2.0 km/hr/s.

Acceleration

Initial velocity = u = 20 km/hr,

Velocity after 30 seconds = v = u + at

Velocity after 30 seconds = v = 20 km/hr + 2 (km/hr/s)*30s =

Velocity after 30 seconds = v = 20 km/hr + 60 km/hr = 80 km/ hr

Velocity after 30 seconds = v = 80 km/hr=22.22 m/s
_______________________________-
2.) A runner achieves a velocity of 11.1 m/s 9 s after he begins.

His acceleration = a =11.1/9=1.233 m/s^2

Distance he covered = s = (1/2)at^2=49.95 m

Draw arrows to show how the forces of thrust,drag,and Gravity act on a racing car as it moves forward

Answers

2 images attatched below
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How many electrons do all halogen atoms need to fill their outer energy level?

Answers

Answer:

Seven

Explanation:

Because all halogens have seven valence electrons, they are “eager” to gain one more electron. Doing so gives them a full outer energy level, which is the most stable arrangement of electrons. Halogens often combine with alkali metals in group 1 of the periodic table.

Answer:

Halogens only need one electron to complete their valkance shells.

Explanation:

Halogens are present in the VIIA group of the periodic table so seven electrons are already present. one is needed to become stable.

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Can you help me understand force=mass x accleration

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The form of energy in fossil fuels is what kind of energy?