PHYSICS HIGH SCHOOL

Ifyou left a board lying in the grass for a few days, what would happen to the
grass underneath the board? Why?

Answers

Answer 1
Answer: The grass would die (turn brown/yellow). This is because the grass has not received any sunlight. This means it cannot photosynthesise and make glucose (food) which it needs to survive.

Related Questions

A long coaxial cable consists of an inner cylindrical conductor with radius a and an outer coaxial cylinder with inner radius b and outer radius c. The outer cylinder is mounted on insulating supports and has no net charge. The inner cylinder has a uniform positive charge per unit length λCalculate the electric field (a) At any point between the cylinders a distance r from the axis and (b) At any point outside the outer cylinder. (c) Graph the magnitude of the electric field as a function of the distance r from the axis of the cable, from r = 0 to r = 2c. (d) Find the charge per unit length on the inner surface and on the outer surface of the outer cylinder.
Lamar Gant, U.S. powerlifting star, became the first man to deadlift five times his own body weight in 1985. Deadlifting involves raising a loaded barbell from the floor to a position above the head with outstretched arms. Determine the work done by Lamar in deadlifting 300 kg to a height of 0.90 m above the ground (W=Fd).a. 270 Jb. 2646 Jc. 333 Jd. 3.00X10-3 J
A soda bottle is flexible enough that the volume of the bottle can change even without opening it. If you have an empty soda bottle (volume of 2.0 L) at room temperature (25 0C), what will the new volume be if you put it in your freezer (-4.0 0C)?
Which type of radio waves have the highest frequency and are used in radar detection? microwaves x-rays waves infrared waves gamma waves
Which of the following universal forces is the weakest? A. electric B. gravitational C. strong nuclear

What is a quantity Described completely by its magnitude

Answers

Answer:

Scalar

Explanation:

A physical quantity that is completely described by its magnitude; examples of scalars are volume, density, speed, energy, mass, and time. Other quantities, such as force and velocity, have both magnitude and direction and are called vectors.

Your friend is asked to differentiate between evaporation and boiling.what questions could you ask to make him to know the difference between evaporation and boiling?physics question.

Answers

Answer:

Boiling is the "rapid vaporization of liquid" when the liquid is heated at the point where the pressure of the vapor is equal to the pressure exerted by the atmosphere in the liquid.

So during the boiling, the vaporization of the water is also occurring but is a little bit more complex.

Some questions that you may ask your friend to differentiate those two phenomena are:

Which one is used to cook things like pasta? (boiling)

in which process, a liquid is transformed into a gas? (evaporation)

Which one includes the other? (boiling)

Final answer:

Evaporation and boiling are both phases changes, but they differ in the specifics of how and when they happen. These differences involve the temperature and location within the liquid where they occur, as well as the speed of the process.

Explanation:

To differentiate between evaporation and boiling, you could ask your friend these questions:

  1. Does the process occur at any temperature or only at a specific temperature (the boiling point)? (Evaporation can occur at any temperature while boiling only occurs at the boiling point.)
  2. Does the process occur throughout the liquid or only at the surface? (Boiling occurs throughout the liquid while evaporation happens only at the surface.)
  3. Is the process slow or fast? (Evaporation is a slow process while boiling is relatively quick.)

By asking these questions, your friend will be able to identify the key differences that separate evaporation from boiling.

Learn more about Evaporation vs Boiling here:

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When a craton is exposed at earth's surface, it is called a ________. when a craton is exposed at earth's surface, it is called a ________. caldera continental shield mid-ocean ridge plate transform fault region?

Answers

When a Craton is exposed at earth's surface, it is called a continental shield. Continental shield is any of the large stable areas of low relief in the Earth's crust that are composed of Precambrian Crystalline rocks. Shield areas are regarded as continental nuclei, the observation often being made that most continental shields are bordered by belts of folded rocks of post-Precambrian age.

Endothermic reactions give off heat as they proceed.
a. True
b. False

Answers

b. False
Endothermic reactions absorb heat.

A race car is moving with a velocity of 144 kilometers/hour. The driver applies the brakes, and the car comes to a halt in 12.0 seconds. What is the acceleration of the car after 12.0 seconds?

Answers

The problem gives us the value for the initial velocity of the race car, and the time it takes for the race car to come to a complete stop. The question however, proves to be tricky. The question states as follow: "what is the acceleration of the car after 12.0 seconds?" Since it was already established that the car has come to a halt in 12.0 seconds, therefore, the acceleration would have to be 0, as the car would not be moving at all.

Final answer:

The acceleration of the race car after 12.0 seconds is -3.33 m/s^2.

Explanation:

To find the acceleration of the race car after 12.0 seconds, we need to use the formula for acceleration: acceleration = change in velocity / time. The initial velocity of the race car is 144 km/h, and it comes to a halt, so the final velocity is 0 km/h. We need to convert these velocities to meters per second (m/s) before using the formula.

Given that 1 km/h = 0.2778 m/s, the initial velocity is 144 km/h x 0.2778 m/s = 40 m/s. Similarly, the final velocity is 0 km/h x 0.2778 m/s = 0 m/s.

Plugging these values into the formula, we get: acceleration = (0 m/s - 40 m/s) / 12.0 s = -3.33 m/s^2.

Learn more about acceleration here:

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The space shuttle is descending through the earth's atmosphere. How is the mass of the shuttle affected?A. It will remain constant.
B. It will increase with descent.
C. It will decrease with descent.

Answers

the answer is not C i turned it in and got that question wrong.

the answer is B it will increase with descent

I turned it in the second time and i got it right

Answer:it will remain consent because it will be floating up instead of descending

so thats all i have hope i help

Explanation:
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A soccer ball is kicked horizontally. What is its average speed if its displacement is 55.0 m after 12.00 s? What formula was used to solve this problem?