What happens to light when it strikes a concave or convex lens?.

The speed at which the driver must drive for the remaining time to complete the trip in the usual time is 61.25 miles per hour.

The total distance the driver should cover is 500 miles and this should be completed in 9 hours.

Based on the information provided, the regular speed is:

However, we know today he has covered 110 miles and he is 20 minutes late. This means, there are 390 miles to cover and the remaining time is 6.7 hours.

Based on this, let's calculate the new speed:

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A load cell is an essential sensor device used for converting a force, torque, pressure, or displacement into an electrical signal. It is a key component in electronic scales, force measuring instruments, and weighing devices. A student who designs an electric scooter uses a simple column type load cell with two strain gauges.

The load cell measures force or weight by converting the tension or compression acting on the load cell into an electrical signal. A load cell typically comprises four strain gauges that are arranged in a Wheatstone bridge configuration. A column type load cell is cylindrical in shape and is designed to measure loads in compression. It typically comprises two columns that are connected by a metal diaphragm. Two strain gauges are attached to the columns, one for measuring the compressive strain and the other for measuring the tensile strain.

The student designing an electric scooter uses a load cell to measure the weight of the rider and other loads on the scooter. The load cell is typically placed at the bottom of the scooter's frame, and the weight of the rider and the scooter is applied to it. The load cell measures the weight by converting the compression force acting on it into an electrical signal. The two strain gauges attached to the columns of the load cell measure the compressive and tensile strains, respectively. These strains are converted into an electrical signal using a Wheatstone bridge circuit, and the output of the bridge is proportional to the weight applied to the load cell.The student designing the electric scooter needs to select the right load cell for the application. The load cell must be able to measure the maximum weight that the scooter can carry. The column type load cell is suitable for measuring loads in compression, which is ideal for measuring the weight of the rider and the scooter. The two strain gauges attached to the columns of the load cell help to increase the sensitivity and accuracy of the load cell. The Wheatstone bridge circuit helps to convert the strain measurements into an electrical signal that can be processed by the scooter's control system.

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Answer:

Explanation:

Given:

Mass of bicyclist = 50 kg

Mass of bicycle = 10 kg

Initial velocity (u) = 5 m/s

Final velocity (v) = 10 m/s

Find:

(a) What was the total kinetic energy before accelerating = ?

(b) What was the total kinetic energy after accelerating = ?

(c) How much work was done to increase the kinetic energy of the bicyclist = ?

Computation:

Total mass (M) = 50 kg + 10 kg = 60 kg

1. The total kinetic energy before accelerating = 1/2[Mu²]

The total kinetic energy before accelerating = 0.5[(60)(5)²]

The total kinetic energy before accelerating = 750 J

2. The total kinetic energy after accelerating = 1/2[Mv²]

The total kinetic energy after accelerating = 0.5[(60)(10)²]

The total kinetic energy after accelerating = 3,000 J

3. Total work done = Δ K.E

Total work done = 3,000 J - 750 J

Total work done = 2,250 J

Answer:

it is 12.15 km

Explanation:

1215 km ÷1000

=12.15

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Answer:

The distance to come to a halt is approximately 49.53 meters

Explanation:

Thee given parameters are;

The speed of the car, v = 50 mph = 22.35 m/s

The mass of the car, m = 1000 kg

The coefficient of friction,  = 0.514

The force of friction of the brake = Mass × Gravity × Friction = 1000 × 9.81 × 0.514 = 5042.34 N

The initial kinetic energy of the car = 1/2×m×v² = 1/2 × 1000 × 22.35² = 249761.25 J

The work done by the brake = Force of the brake × Distance, d, to come to halt

By conservation of energy, we have;

The work done by the brake = The initial kinetic energy of the car

∴ The initial kinetic energy of the car = Force of the brake × Distance, d, to come to halt

The initial kinetic energy of the car = 249761.25 J = 5042.34 N × Distance, d, to come to halt

∴The distance to come to a halt = 249761.25 J /(5042.34 N) ≈ 49.53 meters

The distance to come to a halt ≈ 49.53 meters.

The car will cover 49.65 m distance before stopping due to application of brake.

Given data:

The mass of car is, M = 1000 kg.

The initial speed of car is, u = 50.0 mph = (50)(0.447 m/s) = 22.35 m/s.

The coefficient of static friction is, \(\mu = 0.514\).

The given problem can be solved using the third kinematic equation of motion. Which is,

\(v^{2}=u^{2}+2as\) ....................................................(1)

Here, v is the final speed, v = 0 (Because car is finally stopping)

s is the distance covered before stopping and a is the magnitude of acceleration.

Now, since frictional force opposes the motion. Then,

\(F = f\\\\ma = \mu \times m \times g\\\\a = 0.514 \times 9.8\\\\a =5.03 \;\rm m/s^{2}\)

Substituting the values in equation (1) as,

\(0^{2}=23.35^{2}+2(-5.03)s\\\\s = \dfrac{2500}{2 \times 5.03}\\\\ s=49.65 \;\rm m\)

Thus, the car will cover 49.65 m distance before stopping due to application of brake.

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Answer:

Please check the explanation.

Explanation:

The slope of the velocity-time graph illustrates the change in velocity with respect to change in time.

In other words, the acceleration of the object is defined by the slope of a velocity graph. The acceleration can be obtained by finding the slope at a particular time.

Hence, the slope of the velocity time graph represent represents acceleration.

2. Also the acceleration of any object, like a car or bike, at some discrete instant in time 't' is termed as instantaneous acceleration which can be determined if we may take the derivate of the given velocity function.

3. A vector that has a direction and magnitude of 1 is termed as a unit vector, often called a direction vector.

Since Alejandro hopes to combine the findings from the collected studies and draw a general conclusion regarding the subject, he is using statistical tool of inference.

There are basically 2 types of statistical tools:

Descriptive tools are used to describe data. They include the use of tables, graphs, measures of dispersion, measures of central tendencies, etc.

Inferential tools are used to deduce conclusions from data. They include measures of significant differences, probability, correlation and regression, etc.

In this case, Alejandro would need to subject the data collected from the 35 studies to inferential statistical analysis tools in order to be able to make relevant conclusions.

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Answer:

go to my comment on your most recent question

Explanation:

Answer:

Explanation:

The mass of the car can be found by using the formula

\(m = \frac{2k}{ {v}^{2} } \\ \)

From the question we have

\(m = \frac{2 \times 300000}{ {20}^{2} } = \frac{600000}{400} = \frac{6000}{4} \\ \)

We have the final answer as

Hope this helps you

The option There is a warm layer of air and a cold layer of air closer to the ground. is the correct answer

Answer:

60 - 45 = A. 15

Explanation:

Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

A flat or highly polished surface called a plane mirror reflects light or waves to create an image. It is a polished, smooth surface that creates a virtual representation of the actual object.

A plane mirror is a surface on which an image can only be produced by at least two light beams. The intersection of these two beams can occur inside the mirror or appear to occur somewhere behind the mirror.

The image that follows illustrates how an object appears when viewed via a plane mirror.

Therefore, 60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

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By using uniform motion, the time taken to accelerate is 5.21 second.

We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule

vt = vo + a . t

vt² = vo² + 2a . s

s = vo . t + 1/2 . a . t²

where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.

From the question above, we know that

vo = 80 km/h = 80 x 1000/3600 m/s = 22.22 m/s

vt = 110 km/h = 110 x 1000/3600 m/s = 30.56 m/s

a = 1.6 m/s²

By using first equation, we can calculate the time taken

vt = vo + a . t

30.56 = 22.22 + 1.6 . t

1.6t = 8.34

t = 5.21 second

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Answer:

133.33 mm

Explanation:

First we need to find the volume of the sphere. The volume of a sphere is given by:

V = (4/3) * pi * r^3

With a radius of 10 cm, we have:

V = (4/3) * pi * r^3 = 4188.79 cm3

The sphere will be moulded into a cylinder, so the volume will be the same. The volume of a cylinder is:

V = pi * r^2 * h

Where h is the height of the cylinder, and for this case, it will be the length.

The radius is the same old radius, so we have:

4188.79 = pi * 10^2 * h

h = 4188.79 / 100pi = 13.3333 cm

In millimeters, we have h = 133.33 mm

In conclusion, wavelengths of electromagnetic radiation that possess sufficient energy to be microbicidal are primarily found in the UV region, specifically UVC radiation with wavelengths between 200 and 280 nm. UVB radiation can also have germicidal properties, but to a lesser extent. UVA radiation is less effective in killing microorganisms.

The wavelengths of electromagnetic radiation that possess sufficient energy to be microbicidal are mainly found in the ultraviolet (UV) region of the spectrum. UV radiation with wavelengths between 200 and 280 nanometers (nm) is particularly effective in killing microorganisms, including bacteria, viruses, and fungi.
UV radiation is classified into three types based on wavelength: UVA, UVB, and UVC. UVC radiation, with wavelengths between 200 and 280 nm, has the highest energy and is the most effective at killing microorganisms. UVC radiation is commonly used in germicidal lamps to disinfect air, water, and surfaces in hospitals, laboratories, and other settings. UVB radiation, with wavelengths between 280 and 315 nm, also has germicidal properties but is less effective than UVC. UVA radiation, with longer wavelengths between 315 and 400 nm, is less effective at killing microorganisms.
In conclusion, wavelengths of electromagnetic radiation that possess sufficient energy to be microbicidal are primarily found in the UV region, specifically UVC radiation with wavelengths between 200 and 280 nm. UVB radiation can also have germicidal properties, but to a lesser extent. UVA radiation is less effective in killing microorganisms.

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Answer:

A. electrical to light

Explanation:

A jumbo-tron video is a very large television that is most times fitted into walls and displayed along the main roads. It has a light-emitting display(LED) property. Energy transformation is the conversion of energy from one form to another.

The video screen just as a regular television in the house emits light, sound and heat energies. Electrical energy which flows from one end to another powers the jumbo-tron video screen and is thus converted into light, heat and sound energies.

The energy transformation that takes place when a jumbo-tron video screen shows an instant replay is electrical to light energy.

Energy transformation is the conversion of energy from one form to another.

Hence the energy transformation that takes place when a jumbo-tron video screen shows an instant replay is electrical to light energy.

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Answer:

1. Beryllium

2. 4

3. 9

4. 0

Explanation:

• The element shown in the image is beryllium because the atom shown contains four protons and the only element with four protons is beryllium.

• The atom's atomic number is 4, because atomic number is the number of protons of an element, and the atom shown contains 4 protons.

• The mass number of the atom is 9. Mass number is the sum of the number of protons and neutrons in the nucleus of an atom, and the atom shown contains 4 protons and 5 neutrons; therefore its mass number is (4 + 5 =) 9.

• The charge of the atom is 0. This is because it has 4 protons which give it a +4 charge, but it also has 4 electrons which give it a -4 charge. Therefore its net charge is: 4 + (-4) = 0.

Answer:

There are plenty more than 9 planets in the world. There are only 8 verified planets in our solar system.

Explanation:

Answer:

It is in the universe. But there are more to be explored in the universe. The Big Bange theory created all of the atoms, molecules, and even the air we breathe. All of the different planets are still out there being created or destroyed or even being sucked into black holes.

Answer:

to talk??? i will talk with you

The masses amount of a proton and neutron are 1.0087 and 1.0073 amu respectively.

This is defined as  sub atomic particle which is positively charged and is present in the nucleus while the neutron is also a particle present in the nucleus but has a neutral charge.

Electrons on the other hand are found outside the nucleus and are negatively charged. It is the sub atomic particle which is actively involved in a chemical reaction.

The masses of neutron and proton are 1.0087 and 1.0073 amu respectively and was discovered by scientists thereby making it the most appropriate choice.

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The Mercalli scale would most likely be used to tell how much earthquake damage was done to homes and other buildings.

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Orange, Blue, and Red are the three filters. They are easy to attach and cover the lens and flash on the front of the Polaroid Go camera.

The primary benefit of Polaroid photography is the immediate visual feedback. Sharing Polaroid photos is one of the simplest things you can do with them.

An image of a friend is taken and given to the friend. Being one-to-one rather than one-to-the-world makes it a little different from other forms of sharing. Polaroid started to lose some of its major clients in the real estate, insurance, and photo identi-fication industries as digital cameras proliferated on the market.

As film sales collapsed, Polaroid declared bankruptcy in October 2001. A series of chemicals and dyes are sandwiched between layers to make up a Polaroid;

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Answer:answer is B

Explanation:

The velocity after 2 seconds is 26 m/s. It takes 11.50 seconds to reach a velocity of 40m/s.

Given the equation s(t) = 6t + 5t²

Let's find the velocity after 2 seconds.

(a) Velocity = (ds)/(dt)

Differentiating s(t) with respect to t, we get; ds(t) / dt = 6 + 10t

At t = 2,ds(t) / dt = 6 + 10t = 6 + 10(2) = 26m/s

Therefore, the velocity after 2 seconds is 26 m/s.

(b) We are to find how long it takes for the velocity to reach 40m/s. We know that the initial velocity of the ball, u = 6m/s. Acceleration = gsinθ = 9.81 x sin (angle of inclination) = 9.81 x 0.3 = 2.943 m/s²From the first equation of motion, v = u + at

We know v = 40m/s, u = 6m/s, a = 2.943m/s² and t is what we are to find, hence the equation becomes;40 = 6 + 2.943(t)t = (40 - 6) / 2.943t = 11.50s

Therefore, it takes 11.50 seconds to reach a velocity of 40m/s.

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Answer:

potential energy cover in to kinetic energy

i hope it will work

Answer: Meteorologists hope to predict the violent storms faster and save lives by creating a more advanced warning system.

Explanation:

Meteorologists are the special scientist who study different weather patterns and predict the changes in the weather in future. They use mathematical models and observe daily weather patterns to forecast the weather in future or weather related calamity like storm, heavy precipitation, and others.

They can also predict the violent storms and they can generate advance warnings before storms by using advanced system of weather forecasting. This helps in creating prior awareness about storm, people can prepare themselves for it, and can save their lives.

Answer:

A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc. and attracts or repels other magnets

Explanation:

Answer:

When we burn wood we are releasing solar energy, in the form of heat, that has been stored in the wood as chemical energy. The process of photosynthesis converted solar energy, water and carbon dioxide into oxygen and the organic molecules that form the wood, half the weight of which is carbon.

Explanation:

The average temperature of the metal bar is \(\frac{2C}{m}\).

The average temperature of the metal bar is the ratio of the total temperature between the cold and hot part to the entire length of the metal bar.

The average temperature of the metal bar us calculated as follows;

\(T_{avg} = \frac{C+ C}{m} \\\\T_{avg} = \frac{2C}{m}\)

Thus, the average temperature of the metal bar is \(\frac{2C}{m}\).

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Answer:

d = 79 m , d = -43 m

Explanation:

This in an exercise of movement in one dimension, the displacement is a vector and the distance is the scalar

Let's calculate the distance

          d = 35 + 18 +26

          d = 79 m

Displacement which is a vector

          d = -35 +18 - 26

          d = -43 m

thebold indicate vector.  The negative sign indicates that the movement is to the left