Is a haircut a physical or chemical change?
Answers
Hope that helped you.
It's a physical because you have to actually do the work by using your hand to give a haircut
Related Questions
Alchemy is a branch of ancient knowledge that states lead metal is a form of gold metal. Which of these best explains whether alchemy is a science or pseudoscience? It is a science because ancient knowledge is often reliable. It is a science because metallurgy is known to be a branch of science. It is pseudoscience because ancient knowledge is mystical yet reliable. It is pseudoscience because each metal is known to be a unique element.
Of the elements fe li te u and he which are considered group b elements
A hot air balloon is filled with of an ideal gas on a cool morning ( The air is heated to What is the volume of the air in the balloon after it is heated? Assume that none of the gas escapes from the balloon.
what are the three molecules that are attached to the plasma membrane, and what are their roles/ functions?
b. density
c. vapor pressure lowering
d. freezing point depression
Answers
Answer:
B. Density
Explanation:
Explanation via Educere
(2) N2(g) + H2(g) =>NH3(g)
(3) 2NaCl(s)=>Na(s) + Cl2(g)
(4) 2KCl(s) => 2K(s) + Cl2(g)
Answers
The correct balanced chemicalequation is 2KCl(s) => 2K(s) + Cl2(g).
The correct balanced chemical equation from the options provided is (4) 2KCl(s) => 2K(s) + Cl2(g).
In this equation, two molecules of potassium chloride (KCl) react to form two molecules of potassium (K) and one molecule of chlorine gas (Cl2). This equation is balanced because the number of atoms of each element is equal on both sides of the equation.
For example, there are two atoms of potassium and two atoms of chlorine on both sides of the equation, ensuring the equation is balanced.
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produced during respiration?
W
X
Y
Z
Answers
Answer:
X
Explanation:
Letter X is mitochondria. The mitochondria produces carbon dioxide, water, and ATP energy during cellular respiration.
Answers
Answer:
The volume of the gas at 200 mmHg will be 2 L.
Explanation:
As the volume increases, the gas particles (atoms or molecules) take longer to reach the walls of the container and therefore collide with them fewer times per unit of time. This means that the pressure will be lower because it represents the frequency of collisions of the gas against the walls. In this way pressure and volume are related, determining Boyle's law which says:
"The volume occupied by a certain gaseous mass at constant temperature is inversely proportional to pressure"
Boyle's law is expressed mathematically as:
P * V = k
Now it is possible to assume that you have a certain volume of gas V1 that is at a pressure P1 at the beginning of the experiment. If you vary the volume of gas to a new value V2, then the pressure will change to P2, and it will be fulfilled:
P1 * V1 = P2 * V2
In this case:
- P1= 800 mmHg
- V1= 500 mL
- P2= 200 mmHg
- V2= ?
Replacing:
800 mmHg* 500 mL= 200 mmHg* V2
Solving:
V2= 2,000 mL= 2 L (being 1,000 mL=1 L)
The volume of the gas at 200 mmHg will be 2 L.
b. Energy flows from the surroundings to the ice.
c. Water molecules lose energy.
d. The temperature of the ice increases as it melts
Answers
A. High concentration of oxygen in the blood; high concentration of carbon dioxide in the body tissues
B. Low concentration of oxygen in the blood; high concentration of carbon dioxide in the body tissues
C. High concentration of oxygen in the blood; low concentration of carbon dioxide in the body tissues
D. Low concentration of oxygen in the blood; low concentration of carbon dioxide in the body tissues
Answers
Answer:
A. High concentration of oxygen in the blood; high concentration of carbon dioxide in the body tissues
Explanation:
Diffusion occurs from a region of higher concentration to a region of lower concentration. Diffusion occurs against a concentration gradient.
High concentration of oxygen in the blood causes oxygen to leave the blood and enter body tissues. High concentration of carbon dioxide in the body tissues causes carbon dioxide to leave body tissues and enter the blood.