i’m kinda stuck right now…

C) end Q attracts both X and Y

Reason: The metal bar PQ is magnetized and has magnetic properties in it, that's I why the point Q is pointing towards the north. The XY bar doesnt point towards any specific direction because it isn't magnetized and doesn't have magnetic properties in it, and that's why it gets attracted by Q and it's both ends.

The number of valance electrons in the given Bohr Diagram is 7 electrons each.

Bohr diagrams depict electrons orbiting the nucleus of an atom in the same way that planets orbit the sun.

Electrons in the Bohr model are depicted as traveling in circles at different shells depending on the element.

We now know that the Bohr Model has some flaws, but it is still widely used because of its straightforward approach to atomic theory.

The Bohr model was also the first to incorporate quantum theory into an atomic model, making it the forerunner of today's more accurate quantum-mechanical models.

Each valance electron in the given Bohr Diagram has 7 electrons.

Thus, the valance electrons in each of the given diagram is 7 electrons as they have these electrons in their outermost shell.

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Apply ohms law

[tex]\\ \tt\hookrightarrow \dfrac{V}{I}=R[/tex]

[tex]\\ \tt\hookrightarrow R=\dfrac{125.6}{7.9}[/tex]

[tex]\\ \tt\hookrightarrow R=15.8\Omega[/tex]

While cooking dinner, Dinah's oven uses a 125.6 V line and draws 7.9 A of current when heated to its maximum temperature. What is the resistance of the oven when it's fully heated?

[tex] \frac{v}{i} = r[/tex]

[tex]r = \frac{125.6}{7.9} [/tex]

[tex]r = 15.8[/tex]

Answer:

The strategy we would like you to learn has five major steps: Focus the Problem, Physics Description, Plan a Solution, Execute the Plan, and Evaluate the Solution. Let's take a detailed look at each of these steps and then do an sample problem following the strategy.

Answer:

velocity arrow

Explanation:

When velocity decreases, acceleration and velocity are in opposite directions, so the acceleration arrow and velocity arrow point in the opposite directions.

Answer:I dont know

Explanation:

Because I dont  know

The power of the fan is 70 Watt.

Power can be defined as the rate at which energy is used. The S.I unit of power is Watt (W)

The power of the fan can be calculated using the formula below.

From the question,

Substitute these values into equation 1

Hence, The power of the fan is 70 Watt.

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A car starts from rest and accelerates at 9 m/s². After 240 m. the final speed is 66 m/s.

Uniformly Accelerated Motion is the motion of an object where the acceleration is constant.

A car starts from rest, that is, its initial speed is 0 m/s. It accelerates at 9 m/s². We can find the final speed after 240 m using the following kinematic equation.

v² = u² + 2 × a × s

v² = (0 m/s)² + 2 × (9 m/s²) × 240 m

v = 66 m/s

where,

A car starts from rest and accelerates at 9 m/s². After 240 m. the final speed is 66 m/s.

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Answer:

The skier is in a conservative system, as the only force acting upon him is gravity. Instead of calculating the work done over the curved hills, we can construct an alternate path, because of the principle of path independence:

Explanation:

When the resistance is doubled, the current reduces by half.

Ohms law states that the voltage applied to a circuit is directly proportional to the current flowing in the circuit.

V = IR

V/R = I

where;

From the equation above, when the resistance is doubled, the current reduces by half.

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Answer:

10 minutes

Explanation:

Given:

Given:Speed of bus excluding stoppages =54 km/h

Speed of bus including stoppages = 45 km/h

To calculate: Minutes/per hour the bus stopped = ?

Distance covered by bus without stopping =54 km/h

Distance covered by bus with stopping =45 km/h

Due to stoppages it could

9km (54-45km) less

Time taken to cover 9 km=?

time \: taken \: = \frac{distane}{speed }timetaken=

speed

distane

Distance=9km

Speed = 54km/h.

Substituting given values on the above formula we get,

time \: taken \: = \frac{9}{54} hour = \frac{1}{6} hour \:timetaken=

54

9

hour=

6

1

hour

=10 minutes

Hence,the correct answer is 10 minutes.

We have that the magnitude of the gravitational force  is mathematically given as

f=6.377N

Question Parameters:

Earth exerts a 100 N gravitational force on a metal box.

(Mass of the earth is 6e24 kg and radius of the earth is 6.4e6m.)

Generally the equation for the Gravitational mForce  is mathematically given as

[tex]F=\frac{GMm}{r^2}\\\\Therefore\\\\F=\frac{100/9.8* 6e116e24}{6.4e6^2}[/tex]

f=6.377N

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The tension in the coupling between the second and third cars is 269,730 N.

Since the weight of each car is the same, the applied force on each will be the same and the tension on the coupling between the cars will be the same.

T = F = ma

T = 9(37,000 x 0.81)

T = 269,730 N

Thus, the tension in the coupling between the second and third cars is 269,730 N.

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Answer

Sun and Moon's gravity

The work is simply W = V Q where V is the voltage of the battery and Q the charge on the electron

W = V joules/coulomb * E coulombs = joules

Friction is the force that opposes motion.

The term friction refers to the force that hinders the movement of a surface over another. The frictional force depends on the nature of the surfaces in contact.

1) The two forces acting on the ball during the frictional force are the forward force and the frictional force.

2) The ball takes more time to roll down the incline in the presence of the cloth because of the increase in friction of the surface.

3) The students repeated the investigation there times in order to ensure accuracy of the results.

4) The energy of the ball changes from potential energy at the top of the ramp to kinetic energy as it rolls down the ramp.

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The second wire is stretched by 15.4 cm long provided the two-wire are made of the same materials and equal forces.

Young's Modulus of Elasticity explains the elastic characteristics of a solid experiencing tension or compression in a unilateral direction

Here,  the material used is a wire which returns to its length after being stretched or compressed.

From the parameters given:

If the second wire is as twice as first, then:

where;

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Answer:

looking at aircraft of a similar size and performance, the propeller diameter is generally in the region of 1.4 – 1.8 m (4.6 ft to 6.0 ft).

Explanation:

The focal length of the lens is 2m and the position of the image is 6 m.

The size of the image formed depends on the position of the object from the lens.

[tex]M = \frac{v}{u}[/tex]

where;

The image distance is calculated as follows;

[tex]2 = \frac{v}{3} \\\\v = 2(3) \\\\v = 6 \ m[/tex]

The focal length of the lens is calculated as follows;

[tex]\frac{1}{f} = \frac{1}{v} + \frac{1}{u}\\\\\frac{1}{f} = \frac{1}{6} + \frac{1}{3} \\\\\frac{1}{f} = \frac{3}{6} \\\\f = 2m[/tex]

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Answer:

i think the answer is (a) since c is not responsible for the electricity

Answer:

i don't know how to explain it but I think it's just the way you do it by yourself

Answer:

I AM COOL DUDE HOW R U?

Explanation:

Answer:

1/4

Explanation:

Total radiation energy depends on temperature, so [tex]E_A=E_B[/tex]

Radius [tex]R_A=2R_B[/tex]

so the surface area [tex]S_A=4 S_B[/tex]

energy per unit area

[tex]\frac{E_A}{S_A}=\frac{1}{4}\frac{E_B}{S_B}[/tex]

Answer: 63.753 mph

Explanation:

[tex]28.5 \frac{m}{s} * \frac{1 mile}{1609.34 m} * \frac{3600s}{1 hour} = 63.753 \frac{miles}{hour}[/tex]

Answer:

False

Explanation:

Unless it encounters external factors, the ship will continue to move at a fixed pace even if the engine is turned off.

Answer: Try and subtract

Explanation:

You need the distance travelled and how long it took so the time. You can use this in the formula Speed = distance / time to calculate the speed or velocity.

Answer:

1. C semi truck

2. C acceleration

Explanation:

We will increase the amplitude of the wave by a factor of 4 If we want to double this rate

Transverse wave, travels in a way in which points on a wave oscillate along paths at right angles of 90 degrees to the direction of the wave.

We see that energy transported along a wave path is directly proportional to the square of the amplitude.

E =kA^2

Therefore, we will increase the amplitude of the wave by a factor of 4 If we want to double this rate.

Option B

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