The diagram shows a simple circuit. Which change would cause the light-bulb to get brighter?
A) Increase the length of the wire between the switch and the battery.
B) Decrease the length of the wire between the switch and the battery.
C) Reverse the direction of the battery.
D) Swap the positions of the lightbulb and the switch.

The Diagram Shows A Simple Circuit. Which Change Would Cause The Light-bulb To Get Brighter?A) Increase

Answers

Answer 1

The correct option is B. Decrease the length of the wire between the switch and the battery.

Resistivity of wire

The resistivity of a wire is the measure of the opposition to the flow of current offered by the wire.

ρ = RA/L

RA = ρL

R = ρL/A

where;

ρ is resistivity of the wireR is resistance of the wireL is lengthA is area

Decrease in length of the wire will cause a decrease in the resistance of the wire, and it will increase the current flowing in the wire, causing the bulb to glow brighter.

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Related Questions

A car is moving along a straight line op is shown below it moves from O to P in 8sec and return to p to q in 6sec. What is the average velocity and the speed of the car

Answers

Answer:

The answer would be A

Explanation:

If a lever has an input arm of 80 cm and an output arm of 20 cm, what is its ideal mechanical advantage?

Answers

Answer:

16

Explanation:

if water completely boils in 7 minutes, how long does it take to evaporate​

Answers

Answer: 20 minutes

Explanation: omm its 20 minutes

A crane does exactly 1800 J of work to lift a steel beam from the ground. The beam is accidentally dropped and falls back to its starting position in 0.9 s. What is the mass of the beam

Answers

Answer:

Explanation:

1800x0.9=1620kg

The next closest star to Earth, Proxima Centuri, is 4.25 lightyears away. How far is that in meters?

Answers

Answer:

4.0208 x 10^16 meters

Explanation:

speed of light in m/s   *      # seconds in a year      * 4.25 years =

2.99792 x 10^8   *        3600*24*365.25  *     4.25 = 4.0208 x 10^16 m

Which form of energy is converted to electrical energy in a voltaic cell?.

Answers

Answer:

chemical energy is converted to electrical energy in a voltaic cell.

Can you explain why number 3 is correct?
Q19. Which waves would be found at the surface at regions A and C?
1. P waves
2. S waves
3. No waves
The correct answer was number 3. But I don’t know why :(

Answers

No waves because Q19 waves would going at the surface at regions

(
the average power transferred to the solar panels by sunlight is 26 000 w
calculate the average energy transferred to the solar panels in 30 seconde
use the equations
energy transferred = power time

Answers

Answer:

P = E / t       definition of power is energy / unit time

1 W = 1 Joule / sec      definition of 1 Watt of power

E = 2.6E4 J/s * 30 s = 7.8E5 Joules = 780,000 Joules

The average power transferred to the solar panels by sunlight is 26 000 w. The average energy transferred to the solar panels in 30 seconds is 780,000 joules.

To calculate the average energy transferred to the solar panels in 30 seconds, we can use the equation:

Energy transferred = Power × Time

Given that the average power transferred to the solar panels is 26,000 watts and the time is 30 seconds, we can substitute these values into the equation:

Energy transferred = Power × Time

Energy transferred = 26,000 × 30

Energy transferred = 780,000 watt-seconds

Since the watt-second is equivalent to the joule (J), the energy transferred to the solar panels is 780,000 joules.

Therefore, the average energy transferred to the solar panels in 30 seconds is 780,000 joules.

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A snail is traveling along a straight path. The snail’s velocity can be modeled by

Answers

The acceleration of the snail will be 7/13 m/sec². The acceleration is found as the rate of change of the velocity.

What is acceleration?

The rate of change of velocity with respect to time is known as acceleration. According to Newton's second law, the eventual effect of all forces applied to a body is its acceleration.

The given data in the problem is;

v(t)=1.4ln(1’t²) inches per minute

0<t<15 minute

Acceleration is found as;

[tex]\rm v('t)=1.4 \times \frac{1}{1+t^2} (2t)[/tex]

Acceleration at t= 5 minute;

[tex]\rm v'(5)=\frac{1.4(2)(5)}{1+5^2} =\frac{14}{26} \\\\ v'=\frac{7}{13}[/tex]

Hence, the acceleration of the snail will be 7/13 inch per square minute.

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According to Newton's 2nd Law of Motion, if the mass of an object is 10 kg and the force is 10 newtons, then the acceleration is
10 m/s/s
10 m/s
100 m/s/s
1 m/s/s

Answers

According to Newton's second Law of motion, if the mass of an object is 10 kg and the force is 10 newtons, then the acceleration is 1m/s².

How to calculate acceleration?

The acceleration of a moving body can be calculated by dividing the force of the body by its mass.

According to this question, the mass of an object is 10 kg and the force is 10 newtons, then the acceleration can be calculated as follows:

acceleration = 10N ÷ 10kg

acceleration = 1m/s²

Therefore, according to Newton's second Law of motion, if the mass of an object is 10 kg and the force is 10 newtons, then the acceleration is 1m/s².

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Greta is on the chairlift going up the mountain when one of her skis falls off.
The ski has a mass of 5 kg and hits the snow below with a speed of 72 km/h.
How high is the chairlift above the snow when the ski falls off?
(Ignore air resistance.)

Answers

The height of the chairlift above the snow when the ski falls off is determined as 20.4 m.

Conservation of energy

The height of the chairlift is calculated from the principle of conservation of mechanical energy as shown below;

P.E = K.E

mgh = ¹/₂mv²

gh = ¹/₂v²

h = v²/2g

where;

v is speed of the ski when it hits the snow below = 72 km/h = 20 m/sg is acceleration due to gravity

h = (20)²/(2 x 9.8)

h = 20.4 m

Thus, the height of the chairlift above the snow when the ski falls off is determined as 20.4 m.

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if line segment g f = 3.2 ft, which is a possible measure of line segment t s? 1.6 ft 3.0 ft 3.2 ft 4.0 ft\

Answers

By applying the relationship of side lengths to interior angles in a triangle, a possible measure of line segment TS is 4.0 ft.

The relationship of sides to interior angles in a triangle.

In Geometry, the relationship of side lengths to interior angles in a triangle include the following:

The shortest side length is always opposite of the smallest interior angle.The longest side length is always opposite of the largest interior angle.

Based on the above theory, we can logically deduce that angle GF < TS or TS > GF because 42° is greater than 56°.

TS > 3.2 ft.

Therefore, a possible measure of line segment TS is 4.0 ft.

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Complete Question:

In the triangles, TR = GE and SR = FE. If Line segment G F = 3.2 ft, which is a possible measure of Line segment TS? 1.6 ft 3.0 ft 3.2 ft 4.0 ft.

Which quantity is a vector quantity?
A.
displacement
B.
distance
C.
mass
D.
temperature
E.
volume

Answers

Answer:

Displacement...

Explanation:

Displacement is a vector quantity as it have both magnitude and direction...

[tex]...[/tex]

a. displacement is the correct answer

Displacement is a vector quantity

EXPLANATION

Displacement is a vector quantity because it has both magnitude and direction.

A boy throws a toy up in the air with an initial velocity of 7.9 m/s at an angle of 37 degrees . what is the maximum height reached by the toy?

Answers

The maximum height reached by the toy at the given velocity and angle of projection is determined as 1.15 m.

Maximum height reached by the toy

The maximum height reached by the toy is calculated as follows;

H = u²sin²θ/2g

where;

u is the initial velocityθ is the angle of projectiong is gravity

H = (7.9² x (sin37)²)/(2 x 9.8)

H = 1.15 m

Thus, the maximum height reached by the toy at the given velocity and angle of projection is determined as 1.15 m.

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5. Calculate the volume of a cube with the following measurements.
Length= 5 cm
Height = 10 cm
Width = 16 cm
O 31 cubic cm
50 cubic cm
O 800 cubic cm
O400 cubic cm

Answers

V= l • w • h

5•10•16= 800

Answer is 800

Does paint and cardboard have joints in it

Answers

Noooo it doesn’t because it’s not apart of the body

Ten minutes after you stop exercising, your heart rate should be (2 points)
equal to your Heart Rate Reserve
in your Target Heart Rate Zone
less than 50 beats per minute
less than 100 beats per minute

Answers

Ten minutes after you stop exercising, your heart rate should be equal to your heart rate reserve

What is Heart Rate Reserve?

This is defined as the heart rate the body decreases to after an exercise session has been done.

This however varies according to age of individuals and is calculated by finding the difference between the maximum and resting heart rate.]

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Four students measured the acceleration of gravity. the accepted value for
their location is 9.78 m/s2. which student's measurement has the largest
percent error?

Answers

The student 4 measurement has the largest percent error. The discrepancy between the calculated value and the correct value is referred to as an "error" in statistics.

What is the error?

An error is a mistaken or erroneous action. In some contexts, an error is interchangeable with a mistake.

The complete question is

'Four students measured the acceleration of gravity. The accepted value for their location is 9.78m/s2. Which student’s measurement has the largest percent error?

A. Student 4: 9.61 m/s2

B. Student 3: 9.88 m/s2

C. Student 2: 9.79 m/s2

D. Student 1: 9.78 m/s2"

The percentage error is found as;

[tex]\rm \% error = \frac{a_A-a_E}{a_E} \times 100[/tex]

The percentage error in the gIven four students is obtained by putting the values in the given problem;

Student 1 ;

[tex]\rm \% error = \frac{9.78-9.78}{9.88}\times 100 \\\\\ \% error = 0 \%[/tex]

Student 2 ;

[tex]\rm \% error = \frac{9.78-9..79}{9.79}\times 100 \\\\\ \% error = - 0.10 \%[/tex]

Student 3 ;

[tex]\rm \% error = \frac{9.78-9.88}{9.88}\times 100 \\\\\ \% error = - 1.01 \%[/tex]

Student 4 ;

[tex]\rm \% error = \frac{9.78-9.61}{9.61}\times 100 \\\\\ \% error =1.77\%[/tex]

Student 4 reports the maximum percentage error.

Hence the student 4 measurement has the largest percent error.

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Gravitation always does negative work. question 48 options: true false

Answers

The statement indicating that 'Gravitation always does negative work' is FALSE.

What is Gravitation?

Gravitation is a fundamental physical force that makes objects attract each other in the Universe.

This force (Gravitation) is required to maintain both constant positions and movement of objects.

In conclusion, the statement indicating that 'Gravitation always does negative work' is FALSE.

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Answer:false

Explanation:

The law of conservation of momentum states that, if left alone, what happens to the total momentum of two interacting objects that make up a system?

Answers

Answer:

The momentum of the colliding bodies before and after the collision remains constant.

Explanation:

The momentum is constant.

how does the egg drop project apply to everyday life​

Answers

Answer:

Explanation:

It apply on how you will protect the egg because you protect the egg at all cost. It's very similar on who is protecting you, You need someone to be there for you always because an egg can't survive on it's own. Just like your life your can't be always rolling around like an egg you need to be safe and always with the person who cares for you. An egg is safe when they are together in a tray just like family and friends.

-1 A 4m long wire of cross-sectional area 2.5 X 10 m² has a resistance of 5. The conductivity of the wire is (a) 2.5 X 10' m (b) 4.0 X 10' m (c) 2.5 X 10'' m¹ -1 -1 (d) 4.0 X 10''m'​

Answers

Answer:

3.2 [tex]10^{-2} ohm^{-1} m^{-1}[/tex]

Explanation:

Resistance=5 ohm

Length=4m

Cross sectional area=2.5 x 10

Conductivity = 1/ resistivity

                      =[tex]\frac{length}{resistance x cross sectional area}[/tex]

Conductivity=4 /5 x 2.5 x 10

Conductivity=4/125

Conductivity=3.2x[tex]10^{-2}[/tex][tex]ohm^{-1} m^{-1}[/tex]

.89m/s A vehicle that starts to move from the rest gets an acceleration of 5m/s² within 2 seconds. Calculate the velocity and distance covered by the vehicle within the given time. [Ans: 10m/s, 10m]​

Answers

Explanation:

s = ?           u = 0m/s        v = ?         a = 5m/s²        t = 2s

v = u + at                  

  = 0 + (5 x 2)              

  = 10 m/s                    

s = ut + 1/2 at²

= (0)(2) +  x    [tex]\frac{1}{2}[/tex]  x 5 x 2²

= 10 m

Hope this helps!


17. what does it mean if a personality
test is reliable?
a. a reliable test will give consistent
results over time.
b. a reliable test reveals forgotten
experiences.
c. a reliable test has strong personal
bias.
d. a reliable test accurately predicts?
your actions.

Answers

A Personality test is said to be reliable because (A). a reliable test will give consistent results over time.

Meaning of Personality test

Personality test can be defined as a test that can be used to verify or ascertain an individuals personality.

Personality test is a test that is carried out by different organizations to help to help them know the individuals in that organization and to help others know how to relate and work with them.

In conclusion, A Personality test is said to be reliable because a reliable test will give consistent results over time.

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Answer:

a.

Explanation:

Calculate the velocity of an object.
moved around a circle with a radius of
1.65m and an acceleration of 3.5 rad /s²

Answers

Answer:

5.775 m/s

Explanation:

radial acceleration = velocity / radius

=> velocity = radial acceleration * radius

=> v = 3.5 * 1.65 = 5.775 (m/s)

The new horizons spacecraft, launched in 2006, spent 9.5 years on its journey to pluto. it derives its electric power from the heat generated by 10 kg of , which has an activity of . each decay emits an alpha particle with an energy of 5.6 mev. what is the total thermal power generated by this plutonium source

Answers

The total thermal power generated by this plutonium source is determined as 5.65 J/s.

Total thermal power generated

The total thermal power generated by this plutonium source is determined as follows;

ΔP = Eλ

where;

E is the energy of the particles = 5.6 mevλ is the activity of the plutonium, which should be = 6.3 x 10¹⁵ s⁻¹

ΔP = (5.6 mev) x (6.3 x 10¹⁵ s⁻¹)

ΔP = (5.6 x 10³ x 1.6 x 10⁻¹⁹ J) x (6.3 x 10¹⁵ s⁻¹)

ΔP = 5.65 J/s

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3. why is the sum of the maximum voltages across each element in a series r l c circuit usually greater than the maximum applied voltage? doesn't that inequality violate kirchhoff's loop rule?

Answers

The sum of the maximum voltages across each element in a series RLC circuit is usually greater than the maximum applied voltage because voltages are added by vector addition.

What is the Kichoff's loop rule?

Kirchhoff's loop rule states that the algebraic sum of potential differences, as well as the voltage supplied by the voltage sources and resistances, in any loop must be equal to zero.

In a series RLCcircuit, the voltages are not added by scalar addition but by vector addition.

Kirchhoff's loop rule is not violated since the voltages across different elements in the circuit are not at their maximum values.

Therefore, the sum of the maximum voltages across each element in a series RLC circuit is usually greater than the maximum applied voltage because voltages are added by vector addition.

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how many cubic meters of habitable space was available in skylab?

A 1,000

B 263

C 5,263

D 10,000​

Answers

361 cubic meters of habitable space was available in the skylab. None of the given options are correct.

Who launched skylab?

NASA launched the first American space station, called Skylab.

The fuel tank of the Saturn SIV-B rocket stage served as the Skylab's residential quarters.

Skylab's livable capacity was large in comparison to the spacecraft that American astronauts had previously used 361 cubic meters.

Skylab offered 361 cubic meters of livable area.

Hence, none of the given options is correct.

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How does gravity relate to potential energy?

Answers

Answer:

the potential energy a massive object has in relation to another massive object due to gravity

Answer:

PE uses the acceleration of gravity in its calculation definition

Explanation:

Potential Energy = mass * acceleration of gravity * height

A 5000kva 230/13. 8kv single phase power transformer has a resistance of 0. 38 ohms and reactance of 1. 9 ohms

Answers

The reactance of the circuit will be 5.233×10⁻⁴ ohm. Inductive reactance is the product of 2 times π frequency and the coil inductance.

What is reactance?

When alternating electricity passes through pure reactance, it causes a voltage drop that is 90 degrees out of phase with the current.

The letter “X” is used to represent reactance in mathematics, and it is measured in ohms.

The inductive reactance of a coil is calculated using the following formula:

Inductive reactance, or XL, is the product of 2 times p (pi), and the frequency of the ac current in hertz, and the coil inductance in henries.

XL= 2πfL

Where,

f {frequency)

L (Inductance)

The reactance of the circuit is found as;

[tex]\rm R_{new}=0.38[{(\frac{1}{60} )^2][/tex]

[tex]\rm R_{new}=1.055 \times 10^{-4} \ ohm[/tex]

The inductance of the circuit is;

[tex]\rm X_{new}=1.9(\frac{1}{60} )^2\\\\X_{new}= 5.233 \times 10^{-4}\ ohm[/tex]

Hence, the reactance of the circuit will be 5.233×10⁻⁴ ohm.

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