Omar wrote a hypothesis about batteries called dry cells.If more dry cells are connected end to end, a light bulb will work longer because there is more energy available.

What are the variables in his hypothesis?

Answers

Answer 1
Answer: Below are the choices:

The independent variable is the number of dry cells, and the dependent variable is the length of time the bulb works.
The independent variable is the length of time the bulb works, and the dependent variable is the number of dry cells.
The independent variable is the number of dry cells, and the dependent variable is the amount of energy available.
The independent variable is the amount of energy available, and the dependent variable is the number of dry cells.

I think the answer is The independent variable is the number of dry cells, and the dependent variable is the amount of energy available.
Answer 2
Answer:

Answer:

im not sure about the answer but i did the test and "The independent variable is the number of dry cells, and the dependent variable is the amount of energy available."is wrong


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The best method to improve air quality is to

Answers

Stop littering and polluting
Hi There!

The best method to improve air quality? I'm going to do indoor. :P

Circulate, Circulate

Renovate Wisely

Filter Refresher

Common Scents

•Clean 


PLEASE HELP ILL GIVE BRAINLIEST
What do you think energy has to do with the heating systems

Answers

Answer:

thermal energy is used to heat water, which is pumped through a system of pipes and radiators. a warm-air heating system burns fuel in a furnace to produce thermal energy.

Help! What role does lactase play in breaking apart the disaccharide lactose?lactase provides a binding site for lactose to initiate chemical breakdown.

lactase lowers the activation energy needed to begin breaking down lactose.

lactase releases heat during the breakdown of lactose.

lactase prevents too many disaccharide molecules from clumping together during chemical reactions

Answers

The lactase enzyme lowers the activation energy required to begin breaking down lactose. Therefore, option (B) is correct.

What is lactase enzyme?

The lactase enzyme is a part of the β-galactosidase family, found along the membrane of villi in the small intestine.

In the human body, the optimum temperature and pH for lactase are 37 ° C and 6 pH respectively. Lactase helps in the complete digestion of milk in the small intestine in the human body.

The lactase enzyme catalyzes the hydrolysis of the β-glycosidic bond of D-lactose. After the completion of the hydrolysis, D-glucose and D-galactose are obtained.

The lactase provides the path of low activation energy to initiate the breakdown of the lactose.

Therefore, option (B) is correct that lactase lowers the activation energy.

Learn more about Lactase, here:

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The functional group in an alcohol is the _____ group.

Answers

Answer is: hydroxyl group (-OH).

A functional group is a group of atoms that determines many of the properties of an organic molecule.

Functional group for alcohol is hydroxyl group or hydroxy group (-OH).

In organic chemistry, alcohol and carboxylic acids contain hydroxy groups.

The atoms of functional groups are linked to each other and to the rest of the molecule with covalent bonds.

The functional group in Alcohol is the Hydroxyl group.

Which molecule is amphoteric?A.
NH4+

B.
H2O

C.
H2CO3−

D.
H2SO4

Answers

Answer:

The answer is B

Explanation:

Answer:

B. H2O

Explanation:

Well, for one example, we know that water is amphoteric... Examples: H2O can become H3O+ or OH-. HCO3- can become CO3^2- or H2CO3

A + c = r solve for a

Answers

Answer: A = -c + r

Explanation:

Answer:

a = r-c. its that simple I guess