Two students standing apart in a classroom have a gravitational force of attraction between them of 3.20 x 10-8 N. If one student has a mass of 50.0 kg and the other has a mass of 60.0 kg

Answers

Answer 1
Answer: I have a hunch that you want to know the distance
between the students.    It's just a hunch.

Here's the formula for the force of gravity between 2 masses:

               Force of gravity =  G · m₁ · m₂ / D²

Take the numbers given in the question, write them into the formula,
and solve it for 'D'.

If you just want the answer and don't care to see the work,
then skip to the bottom line now.

To see every step along the way, keep reading:
 

           ' F '                              ' G '                   ' m₁ '      ' m₂ '
    3.2 x 10⁻⁸ nt  =  (6.67 x 10⁻¹¹ nt-m²/kg²) (50 kg) (60 kg) / D²

    3.2 x 10⁻⁸ nt = (6.67 x 10⁻¹¹ x 50 x 60) (nt-m²) / D²

         D²  =  (6.67 x 10⁻¹¹ x 50 x 60) (nt-m²) / (3.2 x 10⁻⁸ nt)

         D²  =  6.253125 m²

         D  =   √6.253125 m²  =  2.5 m      (rounded)

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Jawless fish and ocean reefs were devastated by which extinction? Late Devonian

Ordovician-Silurian

Permian-Triassic

End Triassic

Cretaceous-Tertiary

Answers

Late Devonian (I believe)

The Late Devonian.

If you go back and reach the text, you may find the passage, "Which species did we lose during this extinction (Late Devonian)? About 20% of all animal families and 70-80% of all animal species were lost. Major victims included the following:

....

- Jawless fish"

Which explains earthquakes and volcanic eruptions?global positioning theory
lithospheric theory
plate tectonics theory
nebular theory

Answers

Plate tectonics theory explains earthquakes and volcanic eruptions. Global positioning theory, lithospheric theory and nebular theory do not explain the earthquakes and volcanic eruptions

Answer:

C. Plate tectonics theory

Explanation:

According to the plate tectonics theory outer layer of earth is divided into seven major and some minor plates. And these plates form convergent,divergent and transverse boundaries. So the Pacific ring of fire, subduction zone, continental drift are evidences of plate tectonics theory. Earthquakes and volcanic eruption are also explained by plate tectonics theory.

At 400 K, a volume of gas has a pressure of 0.40 atmospheres. What is the pressure of this gas at 273 K?

Answers

The pressure of the sample of gas at 273 K is equal to 0.273 atm assuming the volume is constant.

What is Gay Lussac's law?

Gay-Lussac's law can be described as that when the volume of the gas remains constant then the pressure (P) of the gas and the absolute temperature (T) in a direct relationship.

Gay Lussca's law can be  described as mentioned below:

P/T = k

The pressure of gas is directly proportional to absolute temperature of the gas.

P ∝ T                               ( Volume of gas is constant)

or,    P₁/T₁ = P₂/T₂                                            .................(1)

Given, the initial temperature of the gas, T₁ = 400 K

The final temperature of the gas, T₂ = 273 K

The initial pressure of the gas, P₁ = 0.40 atm

The final pressure of the given gas can be calculated from Gay Lussac's law as:

\displaystyle P_2 =(P_1)/(T_1)* T_2

P₂ = (0.40/400) ×273

P₂ = 0.273 atm

Therefore, the pressure of this gas at 273 K is 0.273 atm.

Learn more about Gay Lussac's law, here:

brainly.com/question/11387781

#SPJ2

The ratio p/T is constant. So, you'd get 273*0.40/400

You are standing 100 Meters away from your car when an alligator appears 20meters away from you on the opposite side and you start to run with a speed of 5m/s while the alligator's speed was 8m/s towards you. Will you reach your car before the alligator reaches you? Why?

Answers

Pretty sure you'd be a dead man. Let's break this up shall we?

So if you're running @ 5 m/s at a distance of 100m, then it'll take you 20 seconds to get to the car. This is because distance/velocity=time. ••••• Now the Alligator is another story. He has to run 20m+100m and he runs @ 8 m/s. Using the same equation again, d/v= time, you will find that it takes the alligator 15 seconds to get to your car. So if it takes 20 secs for you to get to safety, and 15 secs for the alligator to maul you, if say you would die.

The main difference between the internal combustion engine and the diesel engine is that the diesel engineA. has no connecting rods.
B. does not have a crankshaft.
C. has no ignition system.
D. does not utilize pistons.

Answers

The correct answer is (b.) does not have crankshaft. The main difference between the internal combustion engine and the diesel engine is that the diesel engine does not have a crankshaft. The crankshaft is for the conversion of the reciprocal into a circular motion.

Each of 100 identical blocks sitting on a frictionless surface is connected to the next block by a massless string. The first block is pulled with a force of 100 N. What is the tension in the string connecting block 100 to block 99? What is the tension in the string connecting block 50 to block 51?

Answers

We have that for the Question "What is the tension in the string connecting block 100 to block 99? What is the tension in the string connecting block 50 to block 51?"

it can be said that

  • The tension in the string connecting block 100 to block 99 = 1N
  • The tension in the string connecting block 50 to block 51 = 50N

From the question we are told

Each of 100 identical blocks sitting on a frictionless surface is connected to the next block by a massless string. The first block is pulled with a force of 100 N.

Assuming mass of each block is 1 kg

The equation for the force is given as

F = ma\n\na = (F)/(m)\n\n = (100)/(100*1)\n\n = 1 m/s^2

Now, between block 100 and 99,

F = ma\n\nF = 1*1 \n\n= 1 N

Now between block 50 and 51. There are 50 blocks behind 51 st block,  so,

m = 50 Kg\n\na = 1 m/s2 (assuming all blocks accelerate at same rate)\n\nF = 50 * 1\n\nF= 50 N

For more information on this visit

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Answer:

The tension in the string connecting block 50 to block 51 is 50 N.

Explanation:

Given that,

Number of block = 100

Force = 100 N

let m be the mass of each block.

We need to calculate the net force acting on the 100th block

Using second law of newton

F=ma

100=100m* a

ma=1\ N

We need to calculate the tension in the string between blocks 99 and 100

Using formula of force

F_(100-99)=ma

F_(100-99)=1

We need to calculate the total number of masses attached to the string

Using formula for mass

m'=(100-50)m

m'=50m

We need to calculate the tension in the string connecting block 50 to block 51

Using formula of tension

F_(50)=m'a

Put the value into the formula

F_(50)=50m* a

F_(50)=50*1

F_(50)=50\ N

Hence, The tension in the string connecting block 50 to block 51 is 50 N.