Quantitative was to measure light intensity

Answers

Answer 1

Answer: One candela per steradian is termed a lumen, which is the measure of light intensity people are most familiar with One foot candle is equivalent to one lumen per square foot

Answer 2

Answer: whats the question tho??

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What will happen as an object receives energy due to heat flow? The molecules will move faster. The molecules will move more slowly.

Answers

The correct answer is the first option. If an object receives energy from heat flow, the molecules of that object will move faster because temperature and kinetic energy is directly proportional. As the heat is added, the temperature increases therefore increasing the kinetic energy of the molecules resulting to a faster motion.

The molecules will move faster

Which statement describes one characteristic of an operating electrolytic cell?(1) It produces electrical energy.
(2) It requires an external energy source.
(3) It uses radioactive nuclides.
(4) It undergoes a spontaneous redox reaction.

Answers

The answer is (2). The electrolytic cell mechanism is to convert the electrical energy to chemical energy. So it need external energy source. And there is a similar one called voltaic cell which will convert the chemical energy to electrical energy.

The main energy products currently being obtained from the ocean floor are oil and _____.

Answers

The main energy products currently being obtained from the ocean floor are oil and natural gas. Both oil and natural gas are resources that are found naturally on Earth. They are both also comprised of hydrocarbons, meaning carbon and hydrogen. The difference lies in their natural physical state. Oil is a liquid, while natural gas is a gas/vapor.

The number of neutrons in the nucleus of an atom can be determined by(1) adding the atomic number to the mass number
(2) subtracting the atomic number from the mass number
(3) adding the mass number to the atomic mass
(4) subtracting the mass number from the atomic number

Answers

Option no. 2 subtracting the atomic number from the mass number

Example: Zn - 65 atomic weight or mass/mass number
30 atomic number

65-30 = 35 number of neutrons

When a nonmetal bonds with a nonmetal, they form a(n) _______________

Answers

they form a covalent bond

What is the salt produced when calcium hydroxide, Ca(OH)2, reacts with phosphoric acid, H3PO4, in a neutralization reaction?

Answers

Explanation:

A neutralization reaction is a reaction in which two different compounds combine together and result in the formation of salt and water.

Foe example, $Ca(OH)_(2) + H_(3)PO_(4) \rightarrow Ca_(3)(PO_(4))_(2) + 6H_(2)O$

Therefore, salt of calcium phosphate $Ca_(3)(PO_(4))_(2)$ is formed along with formation of water when compounds $Ca(OH)_(2)$ and $H_(3)PO_(4)$ react together.

$3Ca(OH) _(2) +2H _(3) PO _(4)$ ⇒ $6H _(2) O+Ca _(3)(PO _(4)) _(2)$
Calcium phosphate. Which is your Ca3(PO4)2.

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