Suppose you have 4 bulbs in a parallel circuit. If you were to add 2 more bulbs in
parallel with these 4, what would happen to the brightness of all the bulbs.

Answer:

a constant variable?

Explanation:

A constant variable is any aspect of an experiment that a researcher intentionally keeps unchanged throughout an experiment.

Experiments are always testing for measurable change, which is the dependent variable. You can also think of a dependent variable as the result obtained from an experiment. It is dependent on the change that occurs

Answer:

pretty sure its kinetic

Explanation:

Answer:

Kinetic

Explanation:

The stored chemical potential energy of a battery converts to electrical kinetic energy to transport electricity to a light bulb, which radiates thermal kinetic energy.

To convert one system of unit to another  of derived quantities is not a use of dimensional analysis.

Checking for consistency in the dimensions on both sides of an equation entails looking at the dimensions of the physical quantities involved in a problem, such as length, mass, time, electric charge, and temperature.

The core tenet of dimensional analysis is that physical quantities, such as length, mass, and time, may be described in terms of their basic dimensions.

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All of the options listed are included in the uses of dimensional analysis.

Dimensional analysis is a powerful tool used in physics to:

The dimensional analysis involves analyzing the dimensions of physical quantities and using them to establish relationships between them.

By using the principles of dimensional analysis, we can simplify complex physical problems and gain insights into the behavior of physical systems.

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While much of the mass of our Galaxy lies within the bright spiral arms, the majority of the mass actually lies outside the luminous part of the Milky Way Galaxy.So the correct option is c.

The Milky Way Galaxy is a vast and expansive collection of stars, gas and dust that spans the universe. It is estimated to contain between 200 and 400 billion stars, making it one of the largest galaxies in the universe. The Milky Way is a spiral galaxy, meaning that it is composed of a central bulge surrounded by four main spiral arms. The luminous part of the Milky Way Galaxy, which is visible from Earth, lies within the spiral arms.

However, the majority of the mass of our Galaxy does not lie within the luminous part of the Milky Way Galaxy. Instead, much of the mass of the Milky Way lies outside the visible part of our Galaxy. This mass is found in the form of dark matter, which is an invisible form of matter that does not emit any light. Dark matter makes up around 85 percent of all the matter in the Universe and is believed to be responsible for the structure and evolution of galaxies.

The rest of the mass of our Galaxy is located within the bulge at the center of the Milky Way, as well as between Earth and the Galactic center. This mass is made up of stars, gas, dust and other forms of matter. While much of the mass of our Galaxy is invisible, it is still an important component of the Milky Way. Without this mass, the structure and evolution of the Milky Way would be drastically different.

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Answer:

105.62°F

Explanation:

When the body temperature having fever is measured to be 40.9 on a scale then it must be a Celsius scale thermometer because 37°C is the normal temperature of a healthy human. In case of fever the given temperature is measured on a standard Celsius scale.

The relation between Fahrenheit and Celsius scale is:

\(\frac{C}{5}=\frac{F-32}{9}\)

\(F=\frac{9C}{5} +32\)

\(F=105.62^{o}F\)

It is a high fever and an immediate medical help must be taken.

(a) The average speed must you have for the second half of the trip to meet your goal is 8 km/h.

(b) The value obtained (8 km/h) is not reasonable for the second half of the distance since the first half is 48km/h.

Average velocity is defined as the change in position or displacement (∆x) divided by the time intervals (∆t) in which the displacement occurs.

average velocity = total distance / total time

v = (d)/(0.5d/v₁ + 0.5d/v₂)

where;

90 km/h = (d) / (0.5d/48 + 0.5d/v₂)

90(0.5d/48 + 0.5d/v₂) = d

0.9375d + 0.5d/v₂ = d

d(0.9375 + 0.5/v₂) = d

0.9375 + 0.5/v₂ = 1

0.5/v₂ = 0.0625

v₂ = 0.5/0.0625

v₂ = 8 km/h

Thus, the average speed must you have for the second half of the trip to meet your goal is 8 km/h.

The value obtained (8 km/h) is not reasonable for the second half of the distance since the first half is 48km/h.

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i) The initial deceleration of the car is -1.6 m/s² and  the time taken is 5 seconds

ii) The final deceleration is -1 m/s²

iii) The total dispalcement = 1016 m

The initial deceleration of the car is given by the formula below:

v² = u² + 2as

where;

Solving for a;

12² = 20² + 2 * a * 80

a = -1.6 m/s²

Time taken, t = v - u / a

t = 12 - 20 / (-1.6)

t = 5 seconds

Final deceleration:

a = v - u / t

a = 0 - 12 / 12

a = -1 m/s²

iii) Displacement at constant velocity = 12 * 1 * 60

Displacement at constant velocity = 720 m

Final displacement, s = ut + 0.5at²

s = 12 * 12 + 0.5 * 1 * 12²

s = 216 m

Total dispalcement = 80 + 720 + 216

Total dispalcement = 1016 m

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Answer:

Explanation:

m=p/v

where m is mass, p is momentum and v is velocity

The velocity of the car will be   \(V=18.18\ \frac{m}{s}\)

As velocity is the movement of the car with respect to time.

It is given that

Mass m  =  1100kg

Momentum= 22000 \(\frac{kgm}{s}\)

The momentum is given as

\(P=mv\)

\(v=\dfrac{p}{m}\)

\(v=\dfrac{22000}{1100} =18.18 \ \dfrac{m}{s}\)

Thus  the velocity of the car will be   \(V=18.18\ \frac{m}{s}\)

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Answer:

the medium through which it travels

Explanation:

The answer to the given riddle of "what goes walk walk but can't talk" is a river because a river can run but not walk, It has a mouth but never talks and has a head but never weeps.

Riddles are questions or statements that offer a puzzle to be solved.

Also, a riddle is a puzzle or joke in which you ask a question that seems to be nonsense but which has a clever or amusing answer.

For the given riddle in this question " what goes walk walk but can't talk"

We will analyze the answer as follows;

A river can run but not walk. It has a mouth but never talks and has a head but never weeps, has a bed (riverbed) but never sleeps.

Thus, we can conclude that the answer to the given riddle of "what goes walk walk but can't talk" is a river because a river can run but not walk, It has a mouth but never talks and has a head but never weeps.

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Answer:

1) 50 facing towards the right

2) 150 facing right

3) 200 facing right

4) 0- no direction

5) 50- facing left

6) 50 facing right

Explanation:

forces in opposite directions and equal magnitudes counteract each other. in number 2 they face the same direction so they would just be added. in number 4 they oppose each other so would be subtracted

Answer:

One can write F = K d^-2  where K = G M m

So dF/dd = -2 K d^-3 =   -2 K / d^3    (As d increases F decreases - it is opposite to the direction of F)

Answer:

Explanation:

B. Central Nervous System

The pressure applied by the standing book on the table is 1,800 N/m².

option B is the correct answer.

The pressure applied by the standing book on the table is determined from the ratio of weight of the book and the area of the standing book.

Mathematically, the formula for the pressure of a material is given as;

P = F / A

where;

The weight of the book , F = mg

where;

F = 1.5 kg  x  9.8 m/s²

F = 14.7 N

The dimension of the book include;

The height of the book is not in contact with the surface of the table, so the area of the book in contact with the table becomes;

A = w x b

W = 0.21 m  x  0.04 m

W = 8.4 X 10⁻³ m²

P = F / A

P = ( 14.7 N ) / ( 8.4 X 10⁻³ m² )

P = 1,750 N/m² ≈ 1,800 N/m²

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Answer: positive

Explanation:

Gravity can be defined as the force with which the body is attracted towards the center of the earth, or towards any other body. If the force acting on the body is in the direction of displacement then the word done by the applicable force is positive. This causes the free fall of the ball under the influence of gravity is also positive.

To find:

The reason for the regular interval of 12 hours between the tides.

Explanation:

The earth rotates in the same direction as the revolution of the moon around the earth. Thus, it takes the earth an extra fifty minutes every day to catch up to the moon. That is the earth catches up to the moon every 24 hours and 50 minutes.

Thus there will be two high and two low tides in a day. Thus there will be 12 hours of interval between two high tides. In other words, the side of the earth that is far from the moon will be near the moon after 12 hours.

Final answer:

Thus the correct answer is option B.

Answer: either 3.20s or 1.18s

Explanation:

Answer:

(a)

Explanation:

The relative error is the ratio of the uncertainty (or error) to the measured value. The percentage error is the relative error multiplied by 100%.

For the length:

Relative error = 0.005 m / 3.955 m = 0.00126

Percentage error = 0.00126 * 100% = 0.126%

For the width:

Relative error = 0.005 m / 3.050 m = 0.00164

Percentage error = 0.00164 * 100% = 0.164%

(b)

The area of the room is given by:

Area = length × width

We can use the formula for the propagation of uncertainty to find the uncertainty in the area, which is given by:

σ_Area = sqrt((σ_length/length)^2 + (σ_width/width)^2) × Area

where σ_length and σ_width are the uncertainties in the length and width measurements, respectively.

Substituting the values:

σ_Area = sqrt((0.005/3.955)^2 + (0.005/3.050)^2) × (3.955 × 3.050) m^2

σ_Area = 0.014 m^2

Therefore, the area of the room is (3.955 × 3.050) m^2, with an uncertainty of ±0.014 m^2.

Answer:

A high EQ (emotional intelligence)

In today's transitioning workplace, having a high EQ is the most important trait of a good boss. Bosses must be able to discern between their own personal beliefs and the thoughts and beliefs of others, and other generations (boomers, Gen X, xennials, millennials and now Gen Z).

Explanation:

hope it helps you

Answer:

According to Albert Einstein's equation, E = m·c², matter and energy are fundamentally related

Events that involve matter and energy that can be explained includes;

The boiling of water in a kettle

The rebound of objects including water after falling

The sound made by airplane and helicopters

Events involving matter and energy that are difficult to explain includes

The cause of the universe that manifest into about matter

The size of the universe

The fundamental object controlling gravity

Decipherable

1) The boiling of water in a kettle; Water boils by the addition of energy that raises the temperature of the particles which result in the forming of vapor as the bonds of the liquid state are broken by the fast moving molecules

2) The rebound of objects including water after falling from a height is proportional to the height from which the object is dropped, due to conservation of energy principle

3) The sound made by airplane and helicopters; This is due the interactions with the air to develop propulsion in the air

Difficult to decipher

1) The cause of the universe that manifest into about matter; The reason behind the formation of the universe is difficult to explain

2) The size of the universe; Will it be possible to know measure a universe

If the universe is measurable, how many universes do we have;

3) The fundamental object controlling gravity; What particle is responsible for gravity and the way if functions

Explanation:

Answer:

C. 5.5 m/s

Explanation:

How fast the balloon travels is determined from the velocity or v

The formula is v = s/t or velocity equals distance divided by time

So, v = 6 meters divided by 1.1 seconds = 5.5 meters per second

Answer:

C. 5.5 m/s

Explanation:

How fast the balloon travels is determined from the velocity or v

The formula is v = s/t or velocity equals distance divided by time

So, v = 6 meters divided by 1.1 seconds = 5.5 meters per second

The energy released when 10 g of steam is spilled on the hand is approximately 25 kJ

The heat required to raise the temperature of 10 g of water from 33 °C to 100 °C is

Q₁ = m x c x ΔT

= 10 g * 4.2 * (100 °C - 33 °C)

= 2772 J

The heat required to vaporize 10 g of water at 100 °C is given by:

Q₂ = m x L

= 10 * 2.2

= 22,000 J

where L is the specific latent heat of vaporization of water

The total energy released

Q = Q1 + Q2

= 2772 J + 22,000 J

= 24,772 J

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Explanation:

i)h=ut+1/2at^2

h=0(2.5s)+1/2(10m/s^2)(2.5s)^2

h=26.25m

ii)v=gt

v=10m/s^2×2.5s=25

The speed of sound traveling in the soil depends on the type of soil.

The speed of sound traveling through soil can vary depending on the composition and density of the soil.

In general, sound travels slower through soil than through air, with typical speeds ranging from around 1000 to 4000 meters per second.

The speed of sound in the soil has been researched to have important implications for seismic surveys, which use sound waves to map underground geological structures and identify potential sources of natural resources like oil and gas.

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When a body of mass 12kg travelling at 4.2m/s² collides with a second body of mass 18kg at rest, their common velocity after the collision is 1.68 m/s.

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Answer:

Independent Variable: Choice of preservative

Dependent Variable: Time it took to brown

Controlled Variables/Constants: Climate, Size of apple slices, and amount of preservative on each slice

Control: Apple Slices without preservatives on them

Repeated Trials: One?

Explanation:

If we replace the incandescent bulb with a voltage meter and return the loop to its original configuration, then moving the bar magnet back and forth through the loop will induce an electrical current in the loop, as described by Faraday's law of electromagnetic induction.

A magnet is a material or object that produces a magnetic field, which is a force that can attract or repel certain other materials, such as iron or steel. The magnetic field is created by the motion of electric charges within the magnet, which align in such a way that they produce a net magnetic field. Magnets can be made from a variety of materials, including iron, cobalt, nickel, and certain alloys. They come in many different shapes and sizes, including bars, discs, horseshoes, and rings.

Here,

The type of current that is generated depends on the direction and rate of the magnet's motion. If the magnet is moved back and forth with a constant speed and in a straight line, the current induced in the loop will be an alternating current (AC), because the direction of the current will reverse every time the magnet changes direction. This can be observed by the voltage meter reading a voltage that periodically changes in direction.

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