choose the correct answer
if the force which act on object increased to triple it's value and the area decreased nine times the the pressure will
a) increase 3 times
b) decrease 3 times
c) decrease 9 times
d) increase 27 times

Explanation:

F=ma=(100kg)(4m/s/s)=400N

N is Newton, the SI unit of force, which is a kg•m/s/s. F is net force and, of course, m is mass and a is acceleration.

The net force acting on a 100kg man standing in an elevator accelerating downward with a=9.8 m/s^2 is d. zero

What is force?

calculation force of a lift:-

 net force,

     Mg-F=Ma

      100*9.8-F=100*9.8

     F=100*9.8-100.9.8

        F= 0

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•How does the dancing activity help you in improving fitness skills?

Answer:

•Health benefits of dancing

improved condition of your heart and lungs. increased muscular strength, endurance and motor fitness. increased aerobic fitness. improved muscle tone and strength.

Explanation:

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(a) The average number of charge carriers flowing past per second is 1.8 x 10⁻⁶ A

(b) The average current delivered in the given time is 2.56 x 10⁶ A.

(c) The time taken to deliver the charge is 32,166.7 s.

The average number of charge flowing per second is calculated as follows;

I = Q/t

I = (45 x 10⁻⁹) / (25 x 10⁻³)

I = 1.8 x 10⁻⁶ A = 1.8μ A

The average current is number of charge flowing in a second.

I = Q/t

Charge of one electron = 1.6 x 10⁻¹⁹ C

Charge of 56 x 10¹⁶ electrons = 56 x 10¹⁶ x 1.6 x 10⁻¹⁹ C = 0.0896 C

I = (0.0896) / (0.035 x 10⁻⁶)

I = 2.56 x 10⁶ A

Total charge in 2+ ions = 2F

1 Faraday = 96,500 C

2F = 2 x 96,500 C = 193,000 C

At the given amount of current, the time taken to deliver the charge is calculated as follows;

Q = It

t = Q/I

t = (193,000 )/6

t = 32,166.7 s = 8.9 hours

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Answer:

12113.318mL

Explanation:

I hope this helps

As resistance doesn't affect potential difference voltmeter reading remains 6V

#3

#a

So

Apply ohms law

[tex]\\ \rm\rightarrowtail I=\dfrac{V}{R}[/tex]

[tex]\\ \rm\rightarrowtail I=\dfrac{9}{3}=3A[/tex]

#b

Switch is off

Answer:

9

Explanation:

Say you had 1 apple, if someone gives you another 8 apples you would have 9 apples total.

Answer:

9

Explanation:

9 is 1 higher than 8, so 8+1 equals 9

Force at moon:-

Use Newtons second law

[tex]\\ \rm\Rrightarrow F=ma=65(1.62)=105.3N[/tex]

Force at moon is one sixth of force at earth

Weight on earth;-

The uses of fossil fuel causes:

Fossil fuels burn and increases in global temperature because it emits greenhouse gases. And the extreme climate change decreases biodiversity and last but not the least it increases pollution because burning of fuels emit gases like Carbon-dioxide etc...~

Answer:

All of the above

Explanation:

Fossil fuels burn causes combustion .

And we know combustion of hydrocarbons releases carbon dioxide .

Answer:

A rock is made from two or more minerals. A mineral might contain just one chemical element or more than one element. ...

The diamond is the Earth's hardest mineral. A diamond is so hard that it's possible to cut a diamond with another diamond

Answer:  it will take it about 2 1/2 minutes to reach Mercury. Not hours.

hope this helps!

Answer:

By seeing by how far away can it attract a paperclip.

Explanation:

vf²=vi²+2ad

12²=0+2.a.10

a = 7.2 m/s²

W = m.g

m = W/g = 98/9.8 = 10 kg

∑F=m.a

W-fr=m.a

fr(air friction)=W - m.a

fr = 98 - 10 x 7.2

fr = 98 - 72

fr = 26 N

Answer:

a.) Total Momentum = 121 Kg•m/s

b.) Momentum of Azad = 94.5 Kg•m/s

c.) Momentum of Bike = 26.5 Kg•m/s

Explanation:

Now,

Mass of Azad = 21 Kg

Velocity = 4.5 m/s

P = 21 Kg × 4.5 m/s

P = 94.5 Kg•m/s

Mass of bike = 5.9 Kg

Velocity = 4.5 m/s

P = 5.9 Kg × 4.5 m/s

P = 26.5 Kg•m/s

Total Momentum = Momentum of Azad + Momentum of Bike

Total Momentum = 94.5 + 26.5 = 121 Kg•m/s

-TheUnknownScientist 72

Answer:

4.5 miles

Explanation:

20 minutes x 3 is 1 hour

1.5 x 3 is 4.5

Answer:

4.5 Miles

Explanation:

20 x 3 = 60

60 min = 1 hour

1.5 x 3 = 4.5

Answer:

Gale force winds, lightning strikes, temperature extremes and a deluge of snow, hail or rain. These combined forces break up the rocks and erode the peaks into their stark, sculpted forms. Falling ice, rocks and gushing water wear away at the mountain slopes.

The sequence of energy conversions is; chemical energy ---> electrical energy ----> heat and light energy

According to thee first law of  thermodynamics, energy can neither be created nor destroyed but can be converted from one form to another. This is also called the principle of conservation of energy.

When the switch is turned on, chemical energy of the battery is converted to electrical energy is produced which is then converted to heat and light energy in the light bulb.'

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Answer: Thermal and Light

Explanation: When the switch is ON, the light bulb turns on, creating light. After a minute, the bulb will start to warm up, and so will the battery.

Answer:

a wave with a time period of 2 seconds has a frequency of 1 ÷ 2 = 0.5 Hz. A sound wave has a time period of 0.0001 seconds.

Answer:

Kicking a ball involves you applying a force because you are pushing it with your foot and that makes it fly up. Once you shoot something into the air, the gravity force pulls it back down to the Earth, which is a different type of force.

Explanation:

hope this helps :)

The wavelength of the water wave is 15 m.

Wavelength is the distance of a complete cycle traveled by a wave.

To calculate the wavelength of the wave, we use the formula below.

Formula:

Where:

make λ the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, The wavelength of the water wave is 15 m.
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Answer:

answer is 12 because 23-11=12

Explanation:

it is because the question want find one atom contains how many

Answer:

More energy

Explanation:

Steam is hotter than boiling water because it contains more energy

Answer:

hhuuufuhrhuuuryheu7uhhehfu

Answer:

if it is totally frictionless you can only need to throw the hockey stick to one other side and wait for yourself to move slowly to the other side. this will happen by the law of conservation of momentum and Newton's First law (continues to move in the uniform velocity without external I. e. friction, Force).

1900s -- 1980s

Forensic science R&D in the 1980s

The wavelength of a wave that has a frequency of 4.29 x 10^14 Hz is 6.9 × 10-⁵m.

The wavelength of a wave can be calculated using the following formula:

λ = v/f

Where;

λ = 3 × 10⁸ ÷ 4.29 × 10¹⁴

λ = 0.69 × 10-⁶

λ = 6.9 × 10-⁵m

Therefore, the wavelength of a wave that has a frequency of 4.29 x 10^14 Hz is 6.9 × 10-⁵m.

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We are given that:

We need to find:

Using equations of motion:

➙ v² - u² = 2as

➙ v = u + at

here,

From the given information, we can conclude that:

Now, using equation of motion:

➝ v = u + at

➝ v = 0 + ( 8 × 1.5 )

➝ v = 0 + 12 .0

➝ v = 12 m/s

For, acceleration :

➝ v² - u² = 2as

➝ ( 12 )² - ( 0 )² = 2 × 8 × s

➝ 144 - 0 = 16s

➝ 16 s = 144

➝ s = 144 / 16

➝ s = 9m

[tex] \dag[/tex] Since, we take displacement in terms of distance in some places, therefore we can say that the height from which the object was dropped is 9 meters .

it would deform, transferring some of its kinetic energy into the concrete molecules. Depending on the relative mass and anchorage of the wall, this may cause it to shift.

The "cosmic tug-of-war" between NGC 2444 and NGC 2445 has result in the creation of new stars based on NASA's report.

A "cosmic tug-of-war" can be defined as a terminology that is used in astronomy to express the ratio of astronomical (planetary) and solar attractions on a natural satellite in space.

According to the National Aeronautics and Space Administration (NASA), NGC 2444 and NGC 2445 are both described as being engaged in a "cosmic tug-of-war" with NGC 2444 seemingly winning the battle..

In conclusion, NGC 2444 and NGC 2445 are both engaged in a "cosmic tug-of-war" because the immense gravity of NGC 2444 is pulling strands of gas from NGC 2445.

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