Which fossil fuel is used the most for energy production?a. coal
b. oil
c. natural gas
d. uranium

Answers

Answer 1

Answer: a. Coal is used to primarily to produce and generate electricity and it is responsible for 39 percent of the power supply for the united states.

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Which of the following states of matter is always a good conductor of electricity? solid, liquid, gas, or plasma **:/ Thank you!
Un herrero calienta un trozo de acero en un horno para poder forjarlo.A medida que aumenta la temperatura del metal ¿Que ocurre con su densidad?¿Aumenta o disminuye? Explica tu respuesta
At which temperature in water does sound travel the fastest?a. 15 C b. 20 C c. 18 C d. 25 C
A ping pong ball rolls off a 5.Om high table and lands on the floor, 3.0maway from the table. How long is the ball in the air?

An equilibrium constant is not changed by a change in pressure
a. True
b. False

Answers

Answer:True

Explanation:In an ideal situation, equilibrium constants cannot be altered if you change the pressure of a system. However, only change in temperature can result to change in equilibrium constants. If there are the same value of molecules on either side of the equation, then a change of pressure is insignificant to the position of equilibrium.

Hi There! :)

An equilibrium constant is not changed by a change in pressurea. True
b. False

False! :P

A pickup truck is carrying a toolbox, but the rear gate of the truck is missing. The toolbox will slide out if it is set moving. The coefficient of static and kinetic friction between the box and the level bed of the truck are 0.300 and 0.200, respectively. What is the greatest acceleration that the truck can have before the toolbox slides out?

Answers

Final answer:

The greatest acceleration that the truck can have before the toolbox slides out can be calculated by understanding the balance between the inertia force experienced by the toolbox due to acceleration (F = ma) and the maximum static friction force (fs(max) = μsN) opposing this motion. The truck can accelerate up to the point at which these two forces are equal.

Explanation:

The question relates to a concept in Physics known as Friction. In this scenario, the toolbox on the truck experiences static friction which keeps it from sliding. The maximum force of static friction can be calculated using the equation fs(max) = μsN, where μs is the coefficient of static friction and N is the normal force. In this case, μs is given as 0.300 and the normal force N equals the weight of the toolbox. The truck can accelerate up to the point where the frictional force equals the force caused by acceleration, which is calculated using the equation F = ma, where m is mass and a is acceleration.

When the truck accelerates, an inertia force acts on the toolbox in the opposite direction. This inertia force, F = ma, should not exceed the maximum static friction force, fs(max), otherwise, the toolbox will slide. Hence, with given values of static friction coefficient and mass of the toolbox, the greatest acceleration of the truck to prevent slipping can be calculated by equating the frictional force and inertia force.

Learn more about Friction here:

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Final answer:

The greatest acceleration that the truck can have before the toolbox slides out is 5.00 m/s².

Explanation:

The greatest acceleration that the truck can have before the toolbox slides out can be found by comparing the force of static friction to the force pushing the toolbox forward. In this case, the force of static friction must be equal to or greater than the force pushing the toolbox, which is the product of the mass of the toolbox and its acceleration. Given the coefficient of static friction of 0.300, the maximum force of static friction can be calculated. Using the equation fs <= μsN, where fs is the force of static friction, μs is the coefficient of static friction, and N is the normal force, we can substitute the values and solve for the maximum force of static friction which is 196 N. The maximum force of static friction is equal to the product of the mass of the toolbox and its acceleration, which gives us the equation fs = max = (50.0 kg)(5.00 m/s²) = 250 N. Therefore, the greatest acceleration that the truck can have before the toolbox slides out is 5.00 m/s².

Learn more about friction here:

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If light travels from oil (slower medium) to water (faster medium) at an angle, what happens to the direction of the light ray in water with respect to normal?A. It moves away from the normal. B. It moves toward the normal.
C. It will move along the normal. D. It will move perpendicular to the normal.
E. It stops traveling.

Answers

If light travels from oil to water at an angle, what happens to the direction of the light ray in water with respect to the normal, is it moves away from the normal.

Answer:

to shorten the other answer...its A

Explanation:

What does the atomic number of an element represent? Question 21 options: A. the number of protons in an atom B. the number of neutrons in an atom the mass of an atom C. the total number of protons, neutrons, and electrons in an atom D. the order in which the element was discovered

Answers

Answer:

A. the number of protons in an atom

Explanation:

The atomic number (also known as the proton number) is the number of protons found in the nucleus of an atom.

Answer:

A. the number of protons in an atom

Explanation:

A rock hits the ground with a speed of 7 m/s and a kinetic energy of 100 J. What is the rock's mass?

Answers

KE=1/2 times mass times velocity squared. So in this situation your equation would look like this 100J=1/2 times mass times 7 m/s^2. Your answer would be 4.0812 kg

mass = (2*KE) / v²
∴ the answer is 200/49

The average distance from the sun to Pluto is approximately 6.10 time 10^9 km. How long does it take light from the sun (384,000 km/s) to reach Pluto?

Answers

From the information as given in the question, the transit time
for light from the sun would be

   (6.1 x 10⁹ km) / (3.84 x 10³ km/sec) = 15,885 seconds (rounded).
   (4.4 hours) .
==============================

-- A better figure for Pluto's average distance from the sun is 5.874 x 10⁹ km.

-- " 384,000 km/sec " is about 28% too high for the speed of light.
    A much better figure is 300,000 km/sec.

Using these numbers, the transit time is

   (5.874 x 10⁹ km) / (3 x 10⁵ km/sec) = 19,580 seconds
   (5.4 hours)

Other Questions

A series circuit contains four light bulbs. The switch is opened and one of the bulbs is removed, but not replaced. Then the switch is closed again. What would you expect to see?A) All three remaining light bulbs will be on. B) None of the remaining light bulbs will be on. C) Only the bulb closest to the switch will be on. D) All three remaining light bulbs will be brighter than before.

When light passes through an object unchanged scientists call that process

When Emma pushes a bag with a force of 27 newtons, the coefficient of kinetic friction between the bag and the floor is 0.23. What is the normal force acting on the bag by the floor?. A. 0.085 newtons B. 27 newtons C. 2.7 × 10^2 newtons . D. 1.2 × 10^2 newtons

Forces that are unequal in size but opposite in direction will cause movement.A) true B)false