A hard material is easily scratched. True False

Answers

Answer 1
Answer: False. Hard material an only be scratched by a material of equal or greater hardness

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If 2.0 j of work is requiered to move 4 c of chsrge between two points in an electric firld, what is the potential difference between the two points

Answers

2 J / 4 C = 1/2 joule per coulomb.

That's 1/2 volt.

If the unemployment rate is rising, what part of the business cycle is the economy most likely experiencing? A. Peak B. Expansion
C. Spiral
D. Recession

Answers

Answer: D. Recession

Explanation:

A recession can be define as the part of the business cycle in which the economy declines for a period of at least six months. The decrease in the economy can be detected by drop in five economic indicators such as employment rate, manufacturing, income, gross domestic product and retail sales.

On the basis of the above explanation, recession is the part of the business cycle in which the unemployment rate rises.

D. Recession 

because the unemployment is rising which is more people loosing their jobs and recession means a decline in something

at a pressure 44 kpa the gas in a cylinder has a volume of 29 liters assuming temperature remains the same,if the volume of the gas is decreased to 4liters what is the new pressure?kpa

Answers

Assuming the gas is ideal, the ideal gas law can be used. To make things simpler, Boyle's law can also be used because it denotes the inverse relationship between pressure and volume at constant temperature. The solution to be used is as follows

P1V1 = P2V2
(44)(29) = P2(4)
P2 = 319 KPa

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Answer:

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What happens to the magnetic domains in a material when the material is placed in a strong magnetic field? Please help and thank you!

Answers

if it is diamagnetic then it magnetise opposite to magnetic field
if paramagnetic it weekly magnetise in direction of magnetic field
if ferromagnetic it strongly magnetise in direction of magnetic field

The energy derived from the digestion of food is __________.a. kinetic energy
b. inertia
c. momentum
d. chemical energy

Answers

By definition, we have to:

Digestion is the transformation of foods that are ingested into simpler substances to be absorbed.

Digestion has different processes:

1) Mechanical processes to reduce the size of food.

2) Chemical processes to reduce the size of the particles and prepare them for absorption.

Therefore, the energy derived from the digestion process is the chemical energy.

Answer:

The energy derived from the digestion of food is chemical energy.

Answer: Chemical energy

Explanation:  

Digestion is a chemical process where glucose burns in presence of oxygen producing energy which helps us to perform work and liberating carbon-dioxide and water. The carbon-dioxide is exhaled out.  

C₆H₁₂O₆ (Food) + O₂ →  CO₂ +H₂O+ Energy

Thus, through digestion chemical energy is obtained as old bonds are broken to form new bonds through a chemical process.