PHYSICS HIGH SCHOOL

Why do objects move at constant speed

Answers

Answer 1
Answer: Most objects move at a constant speed because of friction and acceleration. The constant speed keeps them in place, and keeps a balance. 

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In the cells of the human body oxygen molecules are used directly in a process that?

Answers

In the cells of the human body oxygen molecules are used directly in the process of respiration, because the cells of your body needs oxygen in order to break down food and make energy.

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.

You hear a thunder 3 seconds after you see lightning. How far away is the storm?

Answers

3 seconds (330 m) / second =
990 meter

Answer:

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Explanation:

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Which statement best describes the kinetic theory of matter? Question 7 options: A. Matter is made up of particles that are in constant motion and have energy B. Matter is made up of particles that seldom move and do not possess energy C. Matter is made up of electrons that are in constant motion and have energy D. Matter is made up of particles that vibrate but do not possess energy E. Matter is made up of particles that seldom move and do possess energy

Answers

A. Matter is made up of particles that are in constant motion and have energy

Choose the false statement regarding resistance. A) Longer wires have less resistance. B) Electrical resistance produces heat. C) Resistance slows the flow of current. D) The larger the diameter of the wire, the less resistance.

Answers

The answer would be:

A. Longer wires have less resistance.

Here is why:

The statement is false because longer wires tend to have greater resistance. Look at the formula of resistance below:

R=(\rho L)/(A)

ρ = resistivity

L = length

A = cross-sectional area

As you can see Length of the wire is directly proportional to the resistance, which means as the Length increases, the Resistance increases.

Answer:

A. Longer wires have less resistance.

Explanation:

Integrated circuits are manufactured on chips made of the element.

Answers

The "substrate" of the integrated circuit is super-pure silicon.

Integrated circuits are manufactured on chips made of the element ⇒ silicon.
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