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VARVARA [1.3K]
3 years ago
11

A positive charge is moving from the floor of a room toward the ceiling. A magnetic field runs from east to west. In what direct

ion is the magnetic force on the moving positive charge?
A. toward the north
B. toward the south
C. toward the east
D. toward the west
E. toward the floor
Physics
2 answers:
Readme [11.4K]3 years ago
7 0
<h3><u>Answer;</u></h3>

B. toward the south

<h3><u>Explanation;</u></h3>
  • The right hand rule to determine the direction of magnetic force. This rule state that <em><u>if the thumb, the fore finger, and the middle finger of the right hand are held at right angles to one another, with the fore finger pointing in the direction of the magnetic field, and the middle finger pointing in the direction of the positive charge, then the thumb will point in the direction of the magnetic force.</u></em>
  • In this case, <u><em>the positive charge is moving from the floor towards the ceiling, the magnetic field from east to west direction, thus  suing the right hand rule, the direction of the magnetic force will be towards the south.</em></u>
Korvikt [17]3 years ago
5 0
"Towards south" is the one among the following choices given in the question that is the direction of the magnetic force on the moving positive charge. The correct option among all the options that are given in the question is the second option or option "B". I hope that the answer has actually come to your help.
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What must be the reaction force when someone hits a tree with an axe?
Iteru [2.4K]

Answer: The correct option is that the axe handle applying a force to the person's hand.

Explanation:

This reaction force is due to Newton's third law of motion. This law states that for every action there is equal and opposite reaction to it. This implies that when a force is being exerted on a surface, the surface must exert a force that is equal and opposite in direction to the exerting force. This law represents a certain symmetry in nature that forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.

A typical example of Newton's third law includes:

--> When you hit a tree with an axe: with your hand you exert a force on the tree with the intention to cut it down(action force). The same force you excreted on the tree would be felt in your hands (reaction force).

--> when air rushes out of a balloon: when air escapes for a balloon, the opposite reaction is that the balloon flies up.

7 0
3 years ago
An 84% efficient single pulley is used to lift a 230 kg piano 3.5 m. How much work must be input?
Sati [7]

Answer:

35%

Explanation:

win

3 0
3 years ago
Determine whether each object has potential energy, kinetic energy, or both
Pepsi [2]

Answer:

  1. stretched spring has potential energy
  2. a falling skydiver has kinetic energy
  3. a gallob of gasoline has potential energy
  4. rotating flywheel in a car in a car engine has kinetic energy
  5. a swinging wrecking ball has kinetic energy
  6. skier on a mountaintop has both

4 0
2 years ago
The Lamborghini Huracan has an initial acceleration of 0.80g. Its mass, with a driver, is 1510 kg. If an 80 kg passenger rode al
irina [24]

Answer:

a = 15.1 g

Explanation:

The relation between mass and acceleration is given by :

m\propto \dfrac{1}{a}

If a₁ = 0.80g, m₁ = 1510 kg, m₂ = 80 kg, we need to find a₂

So,

\dfrac{m_1}{m_2}=\dfrac{a_2}{a_1}\\\\a_2=\dfrac{a_1m_1}{m_2}\\\\a_2=\dfrac{0.8g\times 1510}{80}\\\\a_2=15.1g

So, the car's acceleration would be 15.1 g.

6 0
3 years ago
Tectonic plates are large segments of the earth's crust that move slowly. Suppose one such plate has an average speed of 6.0 cm
faltersainse [42]

Answer:

1.35×10⁻⁷ m

37.278 mi/My

Explanation:

Speed of the tectonic plate= 6 cm/yr

Converting to seconds

6=\frac{6}{365.25\times 24\times 60\times 60}

So in one second it will move

\frac{6}{365.25\times 24\times 60\times 60}

In 71 seconds

71\times \frac{6}{365.25\times 24\times 60\times 60}=1.35\times 10^{-5}\ cm

The tectonic plate will move 1.35×10⁻⁵ cm or 1.35×10⁻⁷ m

Convert to mi/My

1 cm = 6.213×10⁻⁶ mi

1 M = 10⁶ years

6\times 6.213\times 10^{-6}\times 10^6=37.278\ mi/My

Speed of the tectonic plate is 37.278 mi/My

7 0
3 years ago
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