13. Squids and octopuses take in water and forcibly expel it through thesiphon in a sudden spurt that pushes them through the water. This
propulsion is an example of which Newton's Law?
A. 1st Law
B. 2nd Law
C. 3rd Law
D. All of Newton's Laws

Answers

Answer 1

Answer:

Squids and octopuses forcefully expel water through the siphon after ingesting it, propelling themselves through the water. Third Law of Newton.

Describe the third law of Newton's law?

His third law asserts that there is an opposite and an equal response in nature for every action (force). When an object A pulls on an object B, the opposite force is applied to the first object by object B. Alternatively said, interactions lead to forces.

What are examples of the third law of Newton?

There are numerous real-world applications of Newton's third motion law. For instance, when you leap, the earth exerts an equal and opposing reaction force that propels you into to the air. This is because when you apply a force to it with your legs, it responds in kind. Rockets and other projectiles are designed using Newton's third law by engineers.

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Explain why ventilation is very important if there is a risk of exposure to radon gas in your home or school

Answers

Ventilation is very important if there is a risk of exposure to radon gas in your home or school because ventilation will help you not to inhale all of the radon particles in your body. Radon gas is dangerous because it does not smell and you cannot see it with your own eyes. Also, it is very toxic and radioactive.

A crate with a mass of 3.00 kg starts from rest at the top of a 27.0∘ incline and slides 2.00 m down the incline in 1.60 s. (a) What is the magnitude of the acceleration of the crate (in m/s² )? (b) What is the frictional force (in N) acting on the crate? (Enter the magnitude.) (c) What is the coefficient of kinetic friction between the crate and the incline? (d) What is the speed of the crate (in m/s ) after it has slid 2.00 m ?

Answers

Answer:

2.00 m/s. Brainliest appreciated, you’re welcome

Compare the sounds produce by wave A and wave B. The human ear would hearA) wave A as a louder sound than wave B.

B) wave A as a higher pitched sound than wave B.

C) wave A and B with the same pitch, but wave A as louder.

D) wave B as a louder and higher pitched sound than wave A.

Answers

The right answer for the question that is being asked and shown above is that: "wave B as a louder and higher pitched sound than wave A." Compare the sounds produce by wave A and wave B. The human ear would hear wave B as a louder and higher pitched sound than wave A.

Answer:

It's A

Explanation:

The human ear would hear wave A as a louder sound than wave B. Wave A has a greater amplitude than wave B. That is perceived as a louder sound. Wave B has a higher frequency; that would be perceived as a higher pitch.

Question 9How many neutrons are in an atom of Mg-25?
O 11
O 12
O
13
O 31

Answers

They differ only because a 24Mg atom has 12 neutrons in its nucleus, a 25Mg atom has 13 neutrons, and a 26Mg has 14 neutrons. Figure 2.3.

Answer:

number of neutrons = 13.

Explanation:

Each element is uniquely and completely identified by its Atomic Number. This is the number of protons in the nucleus, which is equal to the number of electrons in the neutral atom.The Atomic Number of Magnesium is 12.An atom’s Mass Number is the number of protons plus the number of neutrons in its nucleus.For Mg-25 the Mass Number is 25.So 25 = (number of protons) + (number of neutrons)= 12 + (number of neutrons)

a block of mass 5kg slides down an inclined plane that has an angle of 10 degrees if the inclined plane has no friction and the block starts at a height of 0.8m how much kinetic energy does the block have when it reaches the bottom? acceleration due to gravity is 9.8m/s2. someone help me how to solve this, physics conservation of energy

Answers

The physics conservation of energy E = 39.2 joules.

To calculate the Physics conservation of energy.

Mass of the block, m = 5 kg

At the top, the block will have only potential energy which is given by :

P=mgh

At the bottom of the inclined plane, it will have only kinetic energy which is given by :

E=(1/2)mv2

Applying the conservation of energy as :

E=(1/2)mv2=mgh

E=5*9.8*0.8

E = 39.2 joules.

The physics conservation of energy E = 39.2 joules.

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In this case, the inclined plane is frictionless and therefore energy is perfectly conserved with no losses. The block originally starts off with some gravitational potential energy, which is then completely converted into kinetic energy. So the initial gravitational potential energy is equal to the final kinetic energy.

$PE_(initial) = KE_(final)$
$PE_(initial) =mgh=(5kg)(9.8m/ s^(2) )(0.8m)=39.2 joules$
$KE_(final)=39.2joules$

In which of the following sentences is work used in the scientific sense of the word? A scientist works on an experiment in the laboratory.*

B Sam and Rachel pushed, but they could do no work on the car. ????

Answers

B) obviously. Work in a scientific sense is the ability to make a displacement on an object in this case.

In A) the scientist can work on an experiment as your uncle can work on the field planting tomatos.

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