1. On which date does the Antarctic Circle have 24 hours of daylight? A. June 21B. March 21
C. September 21
D. December 21

2. When energy is transferred to air, what happens to the particles of air? A. They move slower.
B. They move faster.
C. They cool down.
D. none of the above

Answers

Answer 1

Answer: The date in which the Antarctic Circle has 24 hours of daylight on December 21st every year. When energy is transferred to air the particles of air become more excited and move around faster.

Answer 2

Answer:

1. On which date does the Antarctic Circle have 24 hours of daylight?

the answer is D

2. when energy is transferred to air, what happens to the particles of Air?

the answer is B

HOPE THIS HELPED

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Which quantity can be calculated using the equation E = mc2?the energy needed to split an atom into separate protons, neutrons, and electrons
the energy needed to split the nucleus into separate protons and neutrons
the energy needed to remove an electron from an atom
the energy needed to add an electron to an atom

Answers

Answer;

-The energy needed to split an atom into separate protons, neutrons, and electrons

Explanation;

E = mc² The equation is derived directly from Einstein’s Special Theory of Relativity .

Each of the letters of E = mc2 stands for a particular physical quantity. Writing them out in full we get:

Energy = mass × the speed of light squared

In other words: E = energy (measured in joules, J), m = mass (measured in kilograms, kg), c = the speed of light (measured in metres per second, ms-1), but this needs to be squared.

Explanation :

Einstein's equation is given by :

$E=m* c^2$ ..............(1)

m is the mass

c is the speed of light $c=3* 10^8\ m/s$

The energy needed to split an atom into separate protons, neutrons, and electrons can be calculated by using equation (1).

The energy needed to split the nucleus into separate protons and neutrons is called nuclear binding energy.

The energy needed to remove an electron from an atom is called ionization energy.

The energy needed to add an electron to an atom is called electron affinity.

So, the correct option is (A).

Imagine the door to a theatre is opened and you are standing outside. How is it possible that you can hear the sound of the movie or play even if you cannot see the screen or stage ?A) reflection only happens with sound waves not waves of light so the sound waves bounce out to your ears.

B) the sound waves refract as they move from one medium to another

C) the darkness in the theatre absorbed light but not sound so you can hear

D) the sound waves diffract much more than the light waves so try bend and spread as they move through the doorway.

Answers

Imagine the door to a theatre is opened and you are standing outside. You can hear the sound of the movie or play even if you cannot see the screen or stage because the sound waves diffract much more than the light waves so try bend and spread as they move through the doorway. The answer is letter D

A truck is moving around a circular curve at a uniform velocity of 13 m/s. If the centripetal force on the truck is 3,300 N and the mass of a the truck is 1,600 kg what's the radius of the curve.

Answers

The radius of the curve is 81.93 metres. We can work this out byconsidering the centripetal force (Fc) = mass x centripetalacceleration.
Fc = m x u (squared)
R = mu (squared) over Fc = 1600 x (13 squared) over 3300
R = 81.93 metres

The Correct answer to this question for Penn Foster Students is: 81.94m

If all the components of a vector are equal to 1, then that vector is a unit vector. Group of answer choices True False

Answers

If all the components of a vector is equal to 1, then that vector is not a unit vector but $[√(3)]$ .

Answer: False

Explanation:

Unit Vector

A vector which defines the direction of a physical quantity is known as a Unit Vector. For a vector, the unit vector is the vector/ mod of the value. Since the mod of a unit vector is always 1, the value is simply represented as its vector form.

If we take all the components of a vector quantity as 1, then its mod will be,

$√(1+1+1)$ i.e. $√(3)$ which is not a unit vector.

Hence, the given statement is false.

Final answer:

All components of a vector being equal to 1 does not necessarily define a unit vector. A unit vector is defined by having a magnitude, or length, of 1. Unless it's a 1-D vector with its single component as 1, a vector with all components as 1 won't be a unit vector.

Explanation:

In mathematics, particularly vector algebra, a unit vector is a vector of length 1. The condition you've mentioned – all components of a vector being equal to 1 – does not generally define a unit vector. When the components of a vector are all 1s (in a 2D or 3D space, for instance), the resultant vector is not a unit vector. This is because the magnitude or length of a vector is calculated by the square root of the sum of the squares of its components.

Learn more about Unit Vector here:

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How could you compare the energy carried in two different longitudinal waves

Answers

U could compare them using the intensity technique when bending waves are negligible in comparison with quasi-longitudinal waves.

Energy carried in two ways can be campared by using the intensity technique when bending waves are negligible in comparison with quasi-longitudinal waves.

Which of the following activities would have the highest excessive momentum?a. golf
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