PHYSICS HIGH SCHOOL

You would convert from grams to moles by using the ___________ of the substance.a. Ionization energy
c. Atomic number
b. Molar mass
d. Avogadro’s number

Answers

Answer 1
Answer:

You would convert from grams to moles by using the molar mass of the substance. The answer is letter B. for example, the molar mass Carbon dioxide is 44.01 g/mol. It means that for 1 mole of carbon dioxide, it contains 44.01 grams of Carbon dioxide.

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Which of the following variables do you need to know in order to calculate the partial pressure of a gas? (We are going to ignore water vapor here.) Check all that apply.
a. the volume of the container that the gas is in
b. the percentage of the gas
c. the percentage of the other gases that comprise the atmosphere
d. the total pressure in the atmosphere

Answers

Answer:

C.)

Explanation:

i said c because. idk i guessed sry
d, the total pressure in the atmosphere

A _________ engine operates using a three-sided metal rotor instead of the traditional piston-and-cylinder arrangement.a. diesel engine
b. electric engine
c. LP gas engine
d. Wankel engine

Answers


That's a description of what makes the "Wankel engine" unique.

When it first came to the USA market, it came as the guts of a
new brand of car . . . the Mazda.  I don't know if some, or all, or
none of today's Mazdas still use the Wankel 'rotary' engine.

What is the purpose of a voltage source?A. It removes insulators in a circuit so electrical charges flow freely.

B. It increases the potential energy of electrical charges to produce a current.

C. It increases the kinetic energy of electrical charges to produce a static discharge.

D. It transfers electrons through induction so they generate electrical energy.

Answers

Answer:

B. It increases the potential energy of electrical charges to produce a current.

Explanation:

Battery is a source of constant potential difference

When a charge is passed through the battery then its potential energy changes by

\Delta U = Q\Delta V

here we know that

\Delta V = potential difference of battery

so as the charge is passing through the terminals of battery its potential energy is changed by above value.

Now by the conservation of energy principle we know that this change in potential energy will convert into kinetic energy of charge and then the flow of charge will produce current in the circuit.

So battery is used to maintain a constant current in the circuit by giving potential energy to the charge.

Why is a raindrop a particularly damaging element to soil

Answers

Answer:

Raindrops are considered damaging to the soil in the following ways:

  1. If it is too wet or too dry, nutrients in the soil can run off and not make it to the plants' roots, leading to poor growth and overall health.
  2. over-watering or too much rain can also lead to bacteria, fungus, and mold growth in the soil
  3. If the average rainfall is much lower or higher than the ideal, it can lead to significant problems, from drowned crops to lower yields.
  4. The soil can also start to collect bacteria, mold, and fungus, which can then be absorbed by the plant. While this isn’t as common in crops as it is in indoor plants, poor drainage and irrigation systems can lead to these types of growths taking control over your crops.
  5. raindrops when it is excessive can lead to erosion and leaching of the soil
  6. soil loss is mostly affected by increasing runoff discharge of rainwater                                      

Cheers!
Rain drop causes Erosion

A spring gun consists of a spring inside a plastic tube with spring constant, k. The spring can be compressed 20 cm from its equilibrium length. A 100 g hard plastic ball is then loaded into the tube. If the ball is shot directly up and reaches a height of 2 m above the top of the tube, what is the spring constant, k? Ignore air resistance.A) 98 N/m
B) 20 N/m
C) 12 N/m
D) 25 N/m
E) 390 N/m

Answers

Answer: The spring constant is K=392.4N/m

Explanation:

According to hook's law the applied force F will be directly proportional to the extension e produced provided the spring is not distorted

The force F=ke

Where k=spring constant

e= Extention produced

h=2m

Given that

e=20cm to meter 20/100= 0.2m

m=100g to kg m=100/1000= 0.1kg

But F=mg

Ignoring air resistance

assuming g=9.81m/s²

Since the compression causes the plastic ball to poses potential energy hence energy stored in the spring

E=1/2ke²=mgh

Substituting our values to find k

First we make k subject of formula

k=2mgh/e²

k=2*0.1*9.81*2/0.1²

K=3.921/0.01

K=392.4N/m

A rectangular in-ground pool is 45 feet long, 15.5 feet wide and 5.5 feet deep. How many cubic feet of water does the pool hold?

Answers

Answer: 3836.25 cubic ft.

Explanation: Simply find the volume of the pool. In this case it's a rectangular prism so we use the volume equation for a rectangular prism:  

1) Volume = length x width x height

2) Volume = 45 ft x 15.5 ft x 5.5 ft

3) 3836.25 cubic ft.
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