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Aloiza [94]
3 years ago
10

The gravitational force between two objects is 2400 N. What will be the gravitational force between the objects if the mass of o

ne object is doubled
600N
1200N
4800N
9600N
Physics
1 answer:
motikmotik3 years ago
6 0

Answer:

4800N

Explanation:

Lets assume,

Mass of first object = m₁

Mass of second object = m₂

Distance between the two objects = r

Thus the force between the two objects will be

F = \frac{G\times m_{1}\times m_{2}}{r^{2}}

where, G = Universal gravitational constant

Given, F = 2400N

New mass of second object = 2m₂

Now, the force will be

F_{2} = \frac{G\times m_{1}\times 2m_{2}}{r^{2}}

F_{2}= 2\frac{G\times m_{1}\times m_{2}}{r^{2}}

F_{2}= 2F

F_{2}= 2\times2400

Thus, F₂ = 4800N

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When a 1.50V battery is shorted by a copper wire whose resistance can be ignored, the current through the copper wire is 2.75 A.
viva [34]

Answer:

Internal resistance = 0.545 ohm

Explanation:

As per ohm's law we know that

V = iR

here we know that

i = electric current = 2.75 A

V = potential difference = 1.50 Volts

now from above equation we have

1.50 = 2.75 ( R)

now we have

R = \frac{1.50}{2.75}

R = 0.545 ohm

5 0
3 years ago
You have created a document that uses the term Frank L. Wright over 30 times. You want to change every occurrence of this term t
fgiga [73]
Find and Replace dialog box is probably the most useful.
3 0
3 years ago
A basketball of mass 0.23kg is thrown horizontally against a rigid vertical wall with a velocity of 20m/s. It rebounds with a ve
Anna11 [10]

Answer:

8.1\:\mathrm{Ns}

Explanation:

The impulse-momentum theorem gives the impulse on an object to be equal to the change in momentum of that object. Since mass is maintained, the change in momentum of the basketball is:

\Delta p = m\Delta v, where m is the mass of the basketball and \Delta v is the change in velocity.

Since the basketball is changing direction, its total change in velocity is:

\Delta v = 20-(-15)=35\:\mathrm{m/s}.

Therefore, the basketball's change in momentum is:

\Delta p = m\Delta v = 0.23\cdot 35= 8.05=8.1\:\mathrm{kg\cdot m/s}.

Thus, the impulse on the basketball is \fbox{$8.1\:\mathrm{Ns}$} (two significant figures).

7 0
2 years ago
A satellite with mass 500 kg is placed in a circular orbit about Earth (Mass= 5.98 x 10^24 kg), radius = (6.4 x 10^6), a distanc
gizmo_the_mogwai [7]

Explanation:

a) F = GmM / r²

F = (6.67×10⁻¹¹) (500) (5.98×10²⁴) / (6.4×10⁶ + 1.5×10⁶)²

F = 3200 N

b) F = ma

3200 = 500a

a = 6.4 m/s²

c) a = v² / r

640 = v² / (6.4×10⁶ + 1.5×10⁶)

v = 7100 m/s

4 0
2 years ago
The Moon has too little iron, Mercury too much. How can both of these anomalies be the result of giant impacts? Explain how the
arsen [322]

Answer:

Explanation:

Giant impact has resulted into formation of celestial bodies such as moon.

Moon was formed years after the Earth was formed. When Earth collided with very big size bodies, there was vaporization of chunks of the planets in to the space. Gravity plays its role and bounded those particles together thus forming moon.

This formation explains Moon is made up of lighter elements and contains too little iron where as Mercury was formed with the rest of the planets and just like earth, its core is formed first which is of iron and then collected the lighter elements to form crust and mantle.

Though both Moon and Mercury were the result of giant impacts yet they have different elements because mercury was made earlier and its is closer to moon hence it collected heavy elements such as iron to for the formation where as moon is the result of collision of Earth and other Mars- sized body hence its constituent particles are different that of mercury.

4 0
3 years ago
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