[01.02]The captain told the passengers that the plane is flying at 450 miles per hour. This information describes the plane's

1 velocity.
2 speed.
3 acceleration.
4 direction.

Answers

Answer 1

Answer:

Answer : speed

Explanation :

Speed is defined as the distance travelled per unit time. It is a scalar quantity.

Velocity is displacement covered per unit time. It is a vector quantity. This means it have both magnitude as well as direction.

When captain told the passengers that the plane is flying at 450 miles per hour, then this shows the speed of plane. He is not talking about the direction in which the plane is flying.

So, this information describes the speed of plane.

Correct option is (2).

Answer 2

Answer: That information describes the plane's speed.
If he had also told them what direction they were flying, then
they would have been able to put the two pieces of information
together, and they would know the plane's velocity.

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"Consider the following atoms: A. Gold, B. Copper, C. Carbon, D.Silver. Consult the periodic table and rank these atoms, from most to least, by their a mass. b. number of electrons. c. number of proto"

Answers

Let's rank the atoms A (Gold), B (Copper), C (Carbon), and D (Silver) based on:

a. Mass (atomic mass or atomic weight)

b. Number of electrons

c. Number of protons

a. Mass (Atomic Mass or Atomic Weight):

1. Gold (A) has an atomic mass of approximately 196.97 atomic mass units (u).

2. Silver (D) has an atomic mass of approximately 107.87 u.

3. Copper (B) has an atomic mass of approximately 63.55 u.

4. Carbon (C) has an atomic mass of approximately 12.01 u.

Ranking by mass from most to least:

1. Gold (A) - 196.97 u

2. Silver (D) - 107.87 u

3. Copper (B) - 63.55 u

4. Carbon (C) - 12.01 u

b. Number of Electrons:

The number of electrons in an atom is equal to the number of protons, which is also the atomic number.

1. Gold (A) has an atomic number of 79, so it has 79 electrons.

2. Silver (D) has an atomic number of 47, so it has 47 electrons.

3. Copper (B) has an atomic number of 29, so it has 29 electrons.

4. Carbon (C) has an atomic number of 6, so it has 6 electrons.

Ranking by the number of electrons from most to least:

1. Gold (A) - 79 electrons

2. Silver (D) - 47 electrons

3. Copper (B) - 29 electrons

4. Carbon (C) - 6 electrons

c. Number of Protons:

The number of protons in an atom is equal to the atomic number.

1. Gold (A) has an atomic number of 79, so it has 79 protons.

2. Silver (D) has an atomic number of 47, so it has 47 protons.

3. Copper (B) has an atomic number of 29, so it has 29 protons.

4. Carbon (C) has an atomic number of 6, so it has 6 protons.

Ranking by the number of protons (which is the same as the ranking by the number of electrons):

1. Gold (A) - 79 protons

2. Silver (D) - 47 protons

3. Copper (B) - 29 protons

4. Carbon (C) - 6 protons

Final answer:

To rank the given atoms by mass, D. Silver has the most mass, followed by A. Gold, B. Copper, and C. Carbon. For number of electrons, B. Copper has the most, followed by A. Gold, C. Carbon, and D. Silver. For number of protons, B. Copper has the most, followed by A. Gold, D. Silver, and C. Carbon.

Explanation:

To rank the given atoms based on their mass, we can refer to the atomic mass or atomic weight of each element. The atomic mass of an element is the sum of the number of protons and neutrons in the nucleus. The element with the highest atomic mass will have the most mass. In this case, the ordering would be D. Silver, A. Gold, B. Copper, and C. Carbon.

To rank the atoms based on the number of electrons, we can refer to the atomic number of each element. The atomic number represents the number of protons, which is equal to the number of electrons in a neutral atom. The element with the highest atomic number will have the most electrons. In this case, the ordering would be B. Copper, A. Gold, C. Carbon, and D. Silver.

To rank the atoms based on the number of protons, we can again refer to the atomic number of each element. The atomic number represents the number of protons in the nucleus. The element with the highest atomic number will have the most protons. In this case, the ordering would be B. Copper, A. Gold, D. Silver, and C. Carbon.

Learn more about Ranking atoms by mass, number of electrons, and number of protons here:

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What is the gravitational force acting on a 70.0 kg object standing on the earth's surface ?

Answers

g( gravitational acceleration)=-9.81 m/s^2
m(mass) = 70.0 kg

According to Newton's second law of motion:

"F=ma"

Force is equal mass per acceleration therefore

W=mg
This is because weigth is the force of gravity acting in a body and "a" is replaced by "g" because "g"
is gravitational acceleration

Therefore:

W= mg
W= (70.0 kg) (-9.81m/s^2)
W= -686.7 N

* The "N" means newton which is (kg* m/s^2)

Final answer:

The gravitational force acting on a 70.0 kg object on Earth is calculated using the formula w=mg and is equal to 686 N.

Explanation:

The gravitational force acting on a 70.0 kg object standing on the earth's surface can be calculated using the formula for weight (which is essentially the gravitational force on the object): w = mg, where m is the mass of the object and g is the acceleration due to gravity. On Earth, g is approximately 9.8 m/s².

Therefore, the gravitational force (weight) acting on this object can be calculated as follows: w = mg = (70.0 kg)(9.8 m/s²) = 686 N. Thus, the gravitational force on this 70.0 kg object standing on the earth's surface is 686 Newtons. It's important to understand that this force will vary if the object is moved to a location where g is different, like on the moon.

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Haloke does 176 J of work lifting himself 0.300m at a constant speed. What is Haloke's mass?

Answers

Since he's lifting himself at constant speed ... not accelerating ... the net vertical force on
him is zero, meaning that he must be lifting with force that's exactly equal to his weight.

Potential energy he added during the lift = (mass) x (gravity) x (height)

Mass = (energy) / (gravity x height) = 176 / (9.8 x 0.3) = 59.864 kg

which of the following is not a projectile? a.a satellite b.a throw ball c.a ball on the ground d.a soaring arrow

Answers

c a ball on the ground

A projectile is known as an object that is thrown in the air or shot in the air....for example a rock that is thrown up from a tall building or a missile that is shot from a rocket launcher. A projectile is usually also considered an object that is thrown up and then comes back down.....using the examples above....if a rock is thrown up eventually it is going to have to come down....same thing for the missile.....

I believe the answer is B.

hope this helps :)

The theoretical line perpindicular to the surface where a light ray hits a mirror is called the

Answers

That's called the "normal" to the surface at that point.

A man carries a 12-kg chair up one flight of stairs to the second floor of his house. If the second floor is 3.3 m above the first floor, what is the change in the gravitational potential energy of the chair? a - 180 J b + 390 J c + 180 J d - 390 J e zero

Answers

Answer:

Change in gravitational potential energy of the chair is, $\Delta PE=390\ J$

Explanation:

It is given that,

Mass of the chair, m = 12 kg

Distance of the second floor from the ground, h = 3.3 m

The position of ground at h = 0

Let $\Delta PE$ is the change in gravitational potential energy of the chair. Initial potential f the chair is equal to 0.

$\Delta PE=mgh$

$\Delta PE=12\ kg* 9.8\ m/s^2* 3.3\ m$

$\Delta PE=388.08\ J$

$\Delta PE=390\ J$

So, the change in the gravitational potential energy of the chair is 390 joules.

Final answer:

The change in gravitational potential energy of the chair is +385 J.

Explanation:

The change in gravitational potential energy of the chair can be calculated using the formula ΔPE = mgh, where m is the mass of the chair, g is the acceleration due to gravity, and h is the change in height. In this case, the mass of the chair is 12 kg, the acceleration due to gravity is 9.8 m/s², and the change in height is 3.3 m. Plugging these values into the formula, we get ΔPE = (12 kg)(9.8 m/s²)(3.3 m) = 384.72 J. Therefore, the change in gravitational potential energy of the chair is approximately +385 J.