explain the rules for mirror and lens in order to form ray diagram​

Answer:

Explanation:

Answer:

friction I would guess? you didnt leave any options.

Explanation:

The house painter must pull down on the rope with a force of 15.2 N to accelerate upward at 0.20 m/s².

Mass of the painter, m = 68 kg

Mass of the chair, M = 8.0 kg

Acceleration, a = 0.20 m/s²

The tension in a rope in such an arrangement is,

T = (m + M) x a

Substituting the given values ,

T = (m + M) x a

T = (68 kg + 8.0 kg) x 0.20 m/s²

  = 15.2 N

Therefore, the house painter must pull down on the rope with a force of 15.2 N to accelerate upward at 0.20 m/s².

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The average force exerted on the ball by the golf club is 490 N.

Thus,  F = p/t = 0.49 * 10³ N = 490 N.

Momentum is a metric for power and how challenging it is to stop an object. Zero momentum applies to any object that is not moving. tremendous, slow-moving objects have tremendous amounts of momentum.

A small, swiftly moving object also possesses a significant momentum. A bowling ball, for instance, has more momentum than a ping-pong ball if their velocities are equal.

This is because bowling balls are larger in mass than ping-pong balls.

Thus, The average force exerted on the ball by the golf club is 490 N.

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Answer:

both drivers experience the same force. just with different "results"

Explanation:

Answer:

You do

Explanation:

Momentum is mass*velocity. So Newton's 3rd law equal and opposite reaction. Because you weigh less you will have more force act on you than the driver who weighs more.

Answer:

I believe 650 or C

Explanation:

plz mark brainnlyist :)

Answer:

80/1

Explanation:

to figure out the answer of how many miles/meters per second divide the meters/miles by the second

so 400÷5 would be 80

80 meters per second

hope this helps :))

We must know that the gravity acceleration on Jupyter is g = 24.79 m/s² , on the Earth g = 9.8 m/s² and on the moon 1.62 m/s².

The weigh of an object is given by:

P = mg

Solving for m:

m = P/g

We see that for the same weight, if gravity is less, then the amount of mass is greater, because they are inversely proportional. So we conclude that the answer is:

Answer:

Aim at the base of the fire and use short bursts until the fire is out.

Explanation:

Fire extinguishers use CO2 (Carbondioxide) as the extinguishing agent. This is because CO2 is denser than air, and does not support combustion.

Aiming at the base of the fire causes the CO2 to fall on the base of the fire, where the source of the fire is, trapping it, and preventing it from further reacting with air in a combustion reaction. Also, the short burst creates a strong wind that forces the flame to blow out.

Answer:

Explanation:

The work done by an object can be found by using the formula

workdone = force × distance

From the question we have

workdone = 30 × 0.5 = 15

We have the final answer as

Hope this helps you

The amount of work done by Pravat if he exerts a force of 30 N to lift a bag of groceries 0.5m is 15J.

The work done by a body can be calculated by multiplying the force exerted by the distance moved. That is;

Work done = force (F) × distance (m)

According to this question, Pravat exerts a force of 30N to lift a bag of groceries 0.5 m. The work done is calculated as follows:

Work done = 30N × 0.5m

Work done = 15J

Therefore, the amount of work done by Pravat if he exerts a force of 30 N to lift a bag of groceries 0.5m is 15J.

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Answer:

Your answer would be letter B. Electrons orbit the nucleus in energy level.

Explanation:

Hope it helps..

Just correct me if I'm wrong, okay?

But ur welcome!!

(;ŏ﹏ŏ)(◕ᴗ◕✿)

Answer:

B

Explanation:

Dalton's 4 principles did not involve discussion of the electrons or their orbits.

The inductance of the flat wire loop is given by: L = μ₀N²πr²/2

To calculate the inductance of a flat wire loop of radius r, we can use the formula for the inductance of a circular loop, which is given by L = μ₀N²A/2R, where μ₀ is the permeability of free space, N is the number of turns, A is the area enclosed by the loop, and R is the mean radius of the loop.

In this case, we are assuming that the contribution to the inductance from the magnetic field inside the wire is negligible. This means that we can treat the wire as if it were hollow and only consider the magnetic field outside the wire.

Given that the wire has a radius r = 0.010r, we can determine the mean radius of the loop by subtracting the inner radius of the wire from the outer radius of the loop. The mean radius is therefore r - 0.010r = 0.990r.

Since the wire is flat, the area enclosed by the loop is simply the area of a circle with radius 0.990r, which is A = π(0.990r)².

Now we can plug the given values into the formula for inductance and calculate the result.

L = μ₀N²A/2R
 = μ₀N²π(0.990r)²/2(0.990r)

Simplifying the equation, we find that the inductance of the flat wire loop is given by:

L = μ₀N²πr²/2

In conclusion, the expression μ₀N²πr²/2 represents the inductance of the flat wire loop with a radius r, considering the wire's radius as 0.010r and neglecting the contribution to inductance from the magnetic field inside the wire.

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Answer:

D

Explanation:

If you list and compare, the elephants hearing range is the closest to a humans.

Humans: 20-20,000

Elephant: 16-12,000

While the others are either too much more or less than a humans.

Bat: 2,000-110,000

Dolphin: 90-105,000

Chicken: 125-2,000

Answer:

A light-year is a unit of distance. It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km. More p recisely, one light-year is equal to 9,500,000,000,000 kilometers

A chemical element with the symbol Be and atomic number 4 is known as beryllium. Beryllium is a solid at room temperature and is categorized as an alkaline earth metal. The molar mass of beryllium (atomic number 4) is 9.012 g/mol. Accordingly, if all 6.22x1023 Beryllium atoms were put together in a mole, they would weigh 9.012g on a triple beam balance.

The atomic mass unit serves as the unit of measurement for mass (amu). A mass unit of an atom is 1.66 x 10-24 gram. The mass of one nucleon, which can be either a single proton or neutron, is roughly equal to one unified atomic mass unit, which is numerically equivalent to 1 g/mol.

In the aircraft industry in particular, beryllium is employed in gears and cogs. A silvery-white metal is beryllium. It has a low density and is relatively soft. Gyroscopes, springs, electrical contacts, spot-welding electrodes, and non-sparking tools all use beryllium in alloys with copper or nickel.

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Assuming that both types of potatoes have the same skin-to-flesh ratio, 10 kg of small potatoes would produce more peelings than 10 kg of large potatoes.

This is because small potatoes have a higher surface area-to-volume ratio than large potatoes, so there is more skin per unit weight. As a result, more peelings would be produced when peeling small potatoes compared to large potatoes.

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The noise level is I=1029 I=log2 times over the threshold of human hearing.

Logarithmic scales are used to measure decibels. This is a method of accounting for or measuring an exponentially growing quantity. For instance, every 10 dB increase in decibels corresponds to a 10-fold increase in sound pressure level (SPL).

The formula for sound speed is vw=f, where f is sound frequency and is sound wavelength. The distance between adjacent, identical wave components, such as between adjacent compressions, determines a sound's wavelength.

The hertz is the SI unit for frequency (Hz). One cycle per second equals one hertz.

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According to the question the radius of the star is 8.7 × 10¹⁰ m..

Radius is a term used to describe the distance from the center of a circle to any point on its circumference. It is also the length of a line segment extending from the center of a circle to any point on its circumference. The radius is an important tool in geometry, allowing for calculations of area and circumference of a circle, as well as the measurement of angles and arcs.

The Stefan-Boltzmann Law states that the total energy emitted by a blackbody radiator is proportional to the fourth power of its temperature.
E = σT⁴
We can rearrange this equation to solve for the radius of the star.
R² = E / (4πσT⁴)
Plugging in the given values, we get:
R² = (3.0 × 1030 W) / (4π × 5.67 × 10-8 W/m² ∙ K4 × 3000 K)
R² = 8.7 × 1010 m
Therefore, the radius of the star is 8.7 × 10¹⁰ m.

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The approximate opening time of the Overcurrent Protection Device (OCPD) can be determined based on the current drawn by the equipment. However, to provide a more accurate answer, we need to know the type of OCPD being used.

Assuming that the OCPD is a standard circuit breaker, the opening time can vary depending on the specific breaker. Generally, circuit breakers have a time-current characteristic curve that defines their tripping time based on the magnitude of the current.

To determine the approximate opening time, we can refer to the manufacturer's data or standard time-current curves. These curves provide a graphical representation of the tripping time for different current values.

For example, if we assume that the circuit breaker has a tripping time of 0.1 seconds at 100 amperes, we can estimate the opening time for a current of 300 amperes by interpolating between the provided data points.

Using linear interpolation, we can calculate the approximate opening time as follows:

- The time difference between 100 amperes and 300 amperes is 200 amperes.
- The time difference between 0.1 seconds and the unknown opening time is t seconds.
- The ratio of the current difference to the time difference is constant: 200 amperes / 0.1 seconds = 300 amperes / t seconds.
- Solving for t, we get t = (0.1 seconds) * (300 amperes / 200 amperes) = 0.15 seconds.

Therefore, based on this estimation, the approximate opening time of the OCPD for a current draw of 300 amperes is 0.15 seconds.

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To solve this problem, we can use the concept of electrostatic equilibrium, where the electric force on the charged spheres is balanced by the force of gravity and tension in the strings.

Where q is the charge on each sphere and E is the magnitude of the electric field. Since the charges on the spheres are equal in magnitude but opposite in sign, the electric forces will have the same magnitude but opposite directions.In equilibrium, the electric force on each sphere and the gravitational force are balanced by the tension in the strings. Thus, we can set up the following equations,Evaluating this expression will give you the magnitude of the electric field (E).

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The discharge of the stream is approximately 3,801,600 ft³/min, 107,701.6 m³/min, and 0.508 MGD.

To calculate the discharge of the stream, we can use the formula:

Discharge = Cross-sectional area × Velocity

First, let's calculate the cross-sectional area:

Cross-sectional area = Width × Depth

Given that the width is 1 mile (5280 ft) and the depth is 80 ft, we have:

Cross-sectional area = 5280 ft × 80 ft = 422,400 ft²

Next, we need to convert the velocity from ft/min to ft³/min. Since the velocity is given as 9 ft/min, the discharge velocity is equal to the cross-sectional area multiplied by the velocity:

Discharge velocity = Cross-sectional area × Velocity = 422,400 ft² × 9 ft/min = 3,801,600 ft³/min

To convert the discharge to other units, we can use the following conversions:

1 m³ = 35.3147 ft³

1 million gallons = 3,068.88 acre-feet

Now, let's perform the conversions:

Discharge in m³/min = Discharge velocity / 35.3147 = 3,801,600 ft³/min / 35.3147 = 107,701.6 m³/min

Discharge in million-gallon/day (MGD) = (Discharge velocity / 7.481) / 1,000,000 = (3,801,600 ft³/min / 7.481) / 1,000,000 = 0.508 MGD

Therefore, the discharge of the stream is approximately 3,801,600 ft³/min, 107,701.6 m³/min, and 0.508 MGD.

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Answer:

C. An article written by a scientist

Explanation:

Research-based original articles written by a scientist can act as a primary source of information. Textbooks, dictionaries and encyclopedias are generally classified as secondary sources and are rarely primary sources.

Answer: C

Explanation: I been there before trust meh...

Answer:

Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.

Explanation:

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He has derived a lot of equations but the most common one is E=mc^2

(Energy=Mass×Speed of light squared)

The horizontal component of the velocity is equal to: D. 15 m/s.

Given the following data:

To determine the horizontal component of the velocity:

The horizontal component of the velocity represents the influence of velocity  in displacing an object or projectile in the horizontal direction.

Mathematically, the horizontal component of velocity is given by the formula:

\(V_x = Vcos(\theta)\)

Substituting the given parameters into the formula, we have;

\(\\\\V_x = 30cos(60)\\\\V_x = 30 \times 0.5\)

Horizontal component, Vx = 15 m/s

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(a) The type of simple machine given in image is wheel and axle.

(b.i) The velocity ratio of the machine is 5.

(b.ii) The mechanical advantage of the machine is  4.

(b.iii) The efficiency of the simple machine is 80%.

(a) The type of simple machine given in image is know as the wheel and axle, as we can see the wheel with bigger and axle with smaller radius.

(b.i) The velocity ratio of the machine is calculated by applying the following formula;

V.R = R/r

V.R = 20 cm / 4 cm

V.R = 5

(b.ii) The mechanical advantage of the machine is calculated as follows;

M.A = Load / Effort

M.A = 200 N / 50 N

M.A = 4

(b.iii) The efficiency of the simple machine is calculated as follows;

E = M.A / V.R x 100%

E = 4 / 5  x 100%

E = 80%

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Answer:

30 m

Explanation:

Let's list out the known variables that we are given in this question.

We are trying to solve for displacement in the x-direction.

Find which constant acceleration equation contains all 4 of these variables.

Plug the known values into the equation and solve for delta x.

The car goes 30 m after the driver begins to brake.

Answer:

the answer should be 30 m

Explanation:

have a good day

When palladium-102, 102/46Pd, undergoes β+ decay, the daughter nucleus contains 47 protons and 36 neutrons, which is ruthenium-102, 102/47Ru.

The decay equation for this process is:

102/46Pd -> 102/47Ru + β+ + νe

During the decay, a proton in the palladium-102 nucleus undergoes a transformation, changing its charge from positive to neutral. This is accompanied by the emission of a positron, which is a positively charged electron, and a neutrino, which is a neutral subatomic particle.

The resulting daughter nucleus, ruthenium-102, has 47 protons, reflecting the increase in proton count due to the conversion, and 36 neutrons, maintaining the overall mass number of 102. This β+ decay process plays a significant role in nuclear physics and radioactive decay, contributing to the understanding of fundamental particles and the stability of atomic nuclei. Hence, the correct option is 47 protons and 36 neutrons.

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Answer:

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