The theory of plate tectonics developed in part from an earlier hypothesis about how continents move. What is the name of this earlier hypothesis? A.
continental drift
B.
earthquake development
C.
natural selection
D.
evolution

Answers

Answer 1

Answer: I think it maybe A. Continental Drift

Answer 2

Answer:

its A i know my science

Related Questions

The speed of sound is 330 m/s and the wavelength of a particular sound wave is 33 meters. Calculate the period of this wave.
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Covalent bonds tend to make atoms more stable by helping them
A drag racer starts her car from rest and accelerates at 11.9 m/s2 for the entire distance of 400 m. What is the speed of the race car at the end of the run?
A tiger runs one kilometer. The tiger does 15,000 J of work and has a total power output of 500 W. How many minutes does it take the tiger to run the distance? (Points : 3)0.30 sec30 sec3.0 sec300 sec

What function does a generator perform inside a power plant?A.The generator stores electrical energy for later use in homes and businesses.

B.The generator transforms the mechanical energy of the turbine into electrical energy.

C.The generator spins the turbine to create mechanical energy.

D.The generator spins the turbine to create electrical energy.

Answers

The generator is called a 'generator' because it 'generates' something
that wasn't there before.

The power plant uses water, steam, or wind, to spin a turbine, and
the generator transforms the mechanical energy of the turbine into
electrical energy (which wasn't there before). (Choice-B)

B. The generator transforms the mechanical energy of the turbine into electrical energy.

Note that a generator uses mechanical energy to turn the wire loop in the magnetic field. This causes electric current to flow, creating electrical energy.

The horsepower (hp) that a shaft can safely transmit varies jointly with its speed, in revolutions per minute (rpm), and the cube of the diameter. If the shaft of a certain material 3 inches in diameter can transmit 46 hp at 100 rpm, what must the diameter be in order to transmit 74 hp at 175 rpm?

Answers

Answer:

diameter ≅ 3 inches

Explanation:

$HP=k*s*d^(3)$

Use a constant factor, k

Let Hp = horsepower

Let s = speed in rpm

Let d = diameter in inches

to find constant k, using

Hp=46

S=100

d=3 in

$46=k*100*3^(3) \n\n46=k*100*27\n46=2700k\nk=(46)/(2700) \nk=0.017\n\n$

To find diameter when;

Hp=74

S=175

k=0.017

d=d inches

$74=0.017*175*d^(3) \n\n74=2.975*d^3\nd^3=(74)/(2.975) \nd=\sqrt[3]{24.87} \nd=2.9 inches\n\n$ d≅ 3 inches

What is the smallest value of the force F such that the 8.0 kg block will not slide down the wall? The coefficient of static friction between the block and the wall is 0.4.Select one:

a. 10N

b. 100N

c. 200N

d. 98N

Answers

The smallest value of the force that will make the block not to slide down is 10 N.

We'll begin by calculating the normal reaction. This can be obtained as follow:

Mass (m) = 8 Kg

Acceleration due to gravity (g) = 10 m/s²

Normal reaction (N) =?

N = mg

N = 8 × 10

N = 80 N

Finally, we shall determine the frictional force.

Coefficient of friction (μ) = 0.4

Normal reaction (N) = 80 N

Frictional Force (F) =?

F = μN

F = 0.4 × 80

F = 32 N

Since the frictional force is 32 N, therefore, a force lesser than the frictional force will make the blocknot to slide down.

From the options given above, only option A has a force that is lesserthan the frictional force.

Therefore, the correct answer to the question is Option A. 10 N

Learn more about frictional force:

brainly.com/question/20049999

Final answer:

The smallest value of the force that will not slide the 8.0 kg block down the wall is 31.36 N.

Explanation:

To determine the smallest value of the force such that the 8.0 kg block will not slide down the wall, we need to consider the static friction between the block and the wall. The formula for static friction is fs = μs * N, where μs is the coefficient of static friction and N is the normal force. In this case, the normal force is equal to the weight of the block, which is mg = 8.0 kg * 9.8 m/s^2 = 78.4 N. Therefore, the smallest value of the force is equal to the maximum static friction force, which can be calculated as fs = 0.4 * 78.4 N = 31.36 N. So the correct answer is 31.36 N.

Learn more about Static Friction here:

brainly.com/question/13000653

#SPJ3

Which gas became part of Earths atmosphere mainly as a result of the evolution of life forms?

Answers

That would be oxygen. Oxygen is generated mostly by plants, so as a result of evolution, it became part of the atmosphere.

The answer is oxygen!

Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 40. cm3. If the combustion of this mixture releases 950. J of energy, to what volume will the gases expand against a constant pressure of 650. torr if all the energy of combustion is converted into work to push back the piston

Answers

The given system is a constant pressure systemwhere the work done is the product of the pressure and the volume change.

The volume to which the gas expands to is approximately 11 liters

Reasons:

Given parameters;

The original volume, V₁ = 40 cm³

The energy released, E = 950 J

Constant pressure applied, P = 650 torr.

Condition: All energy is converted to work to push back the piston

Required:

The volume to which the gas will expand

Solution;

The work done, W = Energy releases, E = 950 J

Work done at constant pressure, W = P·(V₂ - V₁)

Where;

V₂ - The volume to which the gas will expand

Converting the volume to from cm³ to m³ gives;

V₁ = 40 cm³ = 0.00004 m³

Converting the pressure given in torr to Pascals gives;

650 torr. = 86659.54 Pa.

Therefore, we get;

950 J = 86659.54 Pa. × (V₂ - 0.00004 m³)

$V_2 = (950 \, J)/(86659.54 \, Pa) + 0.00004 \, m^3 = (2888)/(263445) \ m^3 + 0.00004 \, m^3 = (2683)/(243855) \, m^3$

Converting to liters gives;

$V_2 =(2683)/(243855) \, m^3 * (1,000 \, l )/(m^3) \approx 11.00244\, l \approx 11 \, l$

The volume to which the gas expands, V₂ ≈ 11 liters.

Learn more here:

brainly.com/question/2139620

Answer:

The volume needed to expand the gas is = 11 Lit = 11000 $cm^(3)$

Explanation:

Given :

Initial volume $V_(1) = 40 cm^(3) = 0.04$ Lit.

Energy $W = 950$ J = 9.38 Lit × atm. ⇒ ( 1 Lit×atm. = 101.325 J )

Pressure $P =$ 650 torr = 0.855 atm. ⇒ ( 1 torr = 0.00132 atm )

In this example we have to be aware of unit conversion system.

From the laws of thermodynamics,

$W = P \Delta V$

Here in this example, all the energy of combustion is converted into work to push back the piston

$W = P (V_(2) - V_(1) )$

$V_(2) - 0.04 = 10.96$

$V_(2) = 11$ Lit = $11000 cm^(3)$

Which scientific law states that matter cannot be created or destroyed?A. first law of nature
B. Newton's first law
C. universal gravitation
D. conservation of mass