The speedometer of a motor car showed the following speeds in km per hour at the ends of successive intervals of 3 secs. 38.9, 52.8, 64.4. 73.6, 80.9, 86.1, 90.0, 92.5 Plot the velocity – time graph in convenient units and find from the graph, (a) The distance covered while the speed increased from 80 to 90 km/h The accelerations in SI units when the speeds are 50, 70 and (b) 90km/h
I will give brainlest to who can answer it ​

(a) The angular acceleration of the grinding wheel as it came to rest is approximately -0.008 rad/s² (clockwise).

(b) The wheel made approximately 1000 revolutions during the time it was coming to rest.

(a) We can use the formula of rotational kinematics:

ω = ω₀ + αt

where ω is the final angular velocity, ω₀ is the initial angular velocity, α is the angular acceleration, and t is the time.

Given:

ω = 0 rad/s (final angular velocity)

ω₀ = 20.0 revolutions per second = 20.0 * 2π rad/s (initial angular velocity)

t = 50.0 s

Substituting the values into the formula, we have:

0 = 20.0 * 2π + α * 50.0

Solving for α, we get:

α ≈ -0.008 rad/s² (clockwise)

(b) To find the number of revolutions the wheel made during the time it was coming to rest, we can use the formula:

θ = ω₀t + 0.5αt²

where θ is the angular displacement.

Given:

ω₀ = 20.0 revolutions per second = 20.0 * 2π rad/s (initial angular velocity)

t = 50.0 s

α ≈ -0.008 rad/s² (clockwise)

Substituting the values into the formula, we have:

θ = (20.0 * 2π) * 50.0 + 0.5 * (-0.008) * (50.0)²

Simplifying the equation, we find:

θ ≈ 1000 revolutions

Therefore, the wheel made approximately 1000 revolutions during the time it was coming to rest.

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(A) The distance from the central maximum to the first bright fringe would be 2.01°(B) the angle from the central maximum to the second dark fringe is  3.01° .(C) The distance would be 0.666meter from the central maximum to the first bright fringe.

Here, can be  written as,

(A) Position of nth bright fringes is,

y = nDλ/d

D = distance between slits and screen

d= separation of slits

λ = wavelength

And here n = 1 for first bright fringe

y = Dλ/d

tanθ = y/D = λ /d

θ = tan⁻¹(λ/d)

θ = tan ⁻¹(543× 10⁻⁹m/1.55×10⁻⁵m)

θ = 2.01°

At 2.01° angle from central maximum to first bright fringe.

(B) For dark fringe

y = (n+1/2)(Dλ/d)

And for second dark fringe n=1

y=  (1+1/2)(Dλ/d)

tanθ = y/D

tanθ = 3/2 (543× 10⁻⁹m/1.55×10⁻⁵m)

θ = 3.01°

At  3.01° angle from central maximum does the second dark fringe appear.

(C) From part A may write as,

y = Dλ/d

y = (1.9m)(543× 10⁻⁹m/1.55×10⁻⁵m)

y = 0.666meter

Thus,  the distance  0.666meter from the central maximum to the first bright fringe.

The complete questions is,

Light at 543 nm from a helium–neon laser shines on a pair of parallel slits separated by 1.55 ✕ 10−5 m and an interference pattern is observed on a screen 1.90 m from the plane of the slits. (a)Find the angle (in degrees) from the central maximum to the first bright fringe.

(b) At what angle (in degrees) from the central maximum does the second dark fringe appear? (c) Find the distance (in m) from the central maximum to the first bright fringe.

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Nuclear energy is the energy in the nucleus, or core, of an atom. Nuclear energy can be used to create kinetic energy or electricity, but it must first be released from the atom.

Nuclear energy originates from the splitting of uranium atoms – a process called fission. This generates heat to produce steam, which is used by a turbine generator to generate electricity. Because nuclear power plants do not burn fuel, they do not produce greenhouse gas emissions.

Some primary uses of nuclear energy are- Space Exploration, Nuclear energy provides nearly 20% of electricity in many countries like United States, Medical Diagnosis and Treatment, Criminal Investigation and Agriculture.

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Answer:

ms jones is a good song poggers

Explanation:

Answer: I believe that the answer is D

Explanation: I already done the test

Answer:

The following statements about grades are accurate:

The following statements about grades are not accurate:

Grades are typically based on a student's performance on tests, quizzes, and assignments. They can also be based on a student's participation in class and their overall attitude toward learning. Grades are often used to determine whether a student is eligible to participate in certain activities, such as sports or clubs. They can also be used to determine whether a student is eligible for scholarships or other financial aid.

Colleges and employers may use grades as a way to screen applicants. They may also use grades to determine whether a student is eligible for certain programs or positions. However, grades are not the only factor that colleges and employers consider. They also consider a student's extracurricular activities, work experience, and letters of recommendation.

Grades can be a useful tool for measuring a student's progress and understanding. However, they are not the only measure of a student's success. It is important to remember that grades are just one piece of the puzzle. There are many other factors that contribute to a student's success, such as their work ethic, their motivation, and their support system.

Answer:

B

Explanation:

The reason its B is because.

The voltage of the battery is 5.7 V. The total resistance of the load is 57 Ohm. The voltage of the battery is 5.7 V.

a) To find the total resistance of the load with two resistors (16 Ohm and 41 Ohm) connected in series, you simply add their resistance values together: Total resistance (R_total) = R1 + R2, R_total = 16 Ohm + 41 Ohm, R_total = 57 Ohm

The total resistance of the load is 57 Ohm.

b) To find the voltage of the battery, you can use Ohm's Law, which is V = I * R. Given the current in the circuit (I) is 0.1 A and the total resistance (R_total) is 57 Ohm: Voltage (V) = I * R_total, V = 0.1 A * 57 Ohm, V = 5.7 V

The voltage of the battery is 5.7 V.

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Answer:

lighter ones will go faster

Explanation:

assuming you throw both bolwing ball with 10N of force. one is 3kg and the other is 5kg.

by using the equation: F = ma

a = F/m

a = 10/5 = 2m/s^2

a = 10/3 = 3.33333 m/s^2

Answer:

c

Explanation:

London dispersion forces are weak intermolecular forces and are considered van der Waals forces. Temporary dipoles can occur in non-polar molecules when the electrons that constantly orbit the nucleus occupy a similar location by chance.

Answer:

The ball would fall vertically for 112.45m

Explanation:

The vertical height of a horizontal throw is affected only by the speed of the throw and the acceleration due to gravity.

At this point, we may use this formula to determine the vertical height of the throw

vertical height =

The initial throwing speed has to be converted to m/s to ensure uniformity during the calculations. To do this we multiply by 1000 and divide by 3600

169.1km/hr = 46.972m/s

Maximum height =  m

The pitch would make the ball fall vertically for 112.45m by the time it reached the home plate 18.2 m away

Answer:

The ball's vertical displacement 5.7 cm

Explanation:

Given:

V₀ = 169.14 m

D = 18.3 m

g = 9,81 m/s²

____________

Δh - ?

Ball flight time:

t = D / V₀ = 18.3 / 169.14 ≈ 0.108 s

The ball's vertical displacement:

Δh = g·t² / 2

Δh = 9.81·0.108² / 2 ≈ 0,057 m    or  5.7 cm

Sputnik 1, the first man-made satellite, was released by the Eastern Bloc on October 4, 1957, as part of the Sputnik project, with Sergei Korolev serving as the program's primary designer.

There are a large number of satellite in use. They serve several functions, including the Satellite Navigation System, amateur radio, television transmission, and weather prediction. In order to conduct studies and acquire data, they also employ telescopes to gaze outwards at the solar system.

Natural and artificial satellite are two distinct categories. The Earth and the Moon are two examples of organic satellites. The Moon orbits the earth while the Earth revolves around the Sun.

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Answer:

Freudian

Explanation:

Answer:

Freudian

Explanation:

Explanation:

because the track and the car moved same speed there their acceleration will be the same

a) The acceleration of the car and the truck are equal since  for both vehicle is 15km/h and the time taken for both vehicle is also the same 5s.

b) The acceleration of the each vehicle is 0.83334 m/s².

Given data in the question is,

Time taken for both car and truck, t = 5 seconds

Initial velocity of car, Uc =50km/hr =13.8889 m/s

Final velocity of car, Vc = 65 km/hr = 18.0556 m/s

Since the truck starts from rest,

Initial velocity of the truck Ut =0

Final velocity of the truck Vt = 15 km/hr = 4.16667 m/s

Acceleration can be defined as the rate of change of velocity.

a) The acceleration of the car and the truck are equal since  for both vehicle is 15 km/h time taken for both vehicle is also the same 5s.

b) The acceleration of each vehicle is to determine.

To determine the acceleration for car and the truck , we use the first equation of motion:

v = u+ at

Where v is the final velocity,

u is the initial velocity,

a is the acceleration,

t is the time.

Now, For the car,

13.8889 m/s = 18.0556 m/s + ( a × 5)

a = \(\frac{ 18.0556 m/s- 13.8889 m/s}{5}\)

a = \(\frac{4.1667}{5}\)

a = 0.83334 m/s².

Hence, the acceleration of the car is 0.83334 m/s².

For the truck,

4.16667 m/s = 0 + (a× 5)

a = \(\frac{0-4.16667}{5}\\\)

a = \(\frac{4.16667}{5}\)

a = 0.83334 m/s²

Hence, the acceleration of the bicycle is 0.83334 m/s².

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Answer:

A

Explanation:

Answer:

Answer A-93

Explanation:

Electromagnetic waves produced by electrons oscillating with a frequency of 2.0 x 10¹⁰ hertz would be classified as radio waves.

Electromagnetic waves are a form of energy that propagate through space in the form of oscillating electric and magnetic fields. These waves are generated by the acceleration or oscillation of charged particles, such as electrons.

The frequency of an electromagnetic wave refers to the number of oscillations or cycles it completes per unit of time. It is usually measured in hertz (Hz), which represents cycles per second. In the given scenario, the electrons are oscillating with a frequency of 2.0 x 10¹⁰ Hz.

Now, let's discuss the classification of electromagnetic waves based on their frequency and wavelength. The electromagnetic spectrum encompasses a wide range of waves, including radio waves, microwaves, infrared waves, visible light, ultraviolet waves, X-rays, and gamma rays.

Radio waves have the longest wavelengths and lowest frequencies among the electromagnetic waves. They typically range from a few centimeters to several kilometers in wavelength. These waves are commonly used for various forms of communication, such as radio and television broadcasting, as well as wireless communication technologies like Wi-Fi and cellular networks.

As the frequency of electromagnetic waves increases, we move through the spectrum, encountering microwaves, infrared waves, visible light, ultraviolet waves, X-rays, and gamma rays in that order. Each segment of the spectrum has distinct properties and applications.

In summary, the electromagnetic waves produced by electrons oscillating with a frequency of 2.0 x 10¹⁰ Hz would be classified as radio waves. These waves have longer wavelengths and lower frequencies compared to other regions of the electromagnetic spectrum and are widely used for communication purposes.

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Answer:

Look below.

Explanation:

If additives are having negative effects on health and the environment, it would be wise to not use detergents containing these additives. These additives could threaten living things such as humans and animals.

There is concern that extra additives in detergents can have negative health and environmental impacts, then it would be very unwise to use detergents containing these additives

It can be defined as the origination of the contaminant substance that poisonous or harmful to our natural environment.

There are several types of pollution that exist in our nature depending on the state and composition of the contaminant, for example, water pollution can exist due to the eutrophication process.

It would be quite unwise to use surfactants that include these additional ingredients since there is fear that they might have a harmful influence on your well-being and the environment.

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Answer:

t = 5.05 s

Explanation:

This is a kinetic problem.

a) to solve it we must fix a reference system, let's use a fixed system on the floor where the height is 0 m

b) in this system the equations of motion are

              y = v₀ t + ½ g t²

where v₀ is the initial velocity that is v₀ = 0 and g is the acceleration of gravity that always points towards the center of the Earth

e)    y = 0 + ½ g t²

     t = √ (2y / g)

     t = √(2 125 / 9.8)

     t = 5.05 s

A scientific theory is an explanation for why natural phenomena occur. It is based on a large amount of evidence and has been thoroughly tested. It is not the same as an untested speculation. Theories can describe specific relationships, such as Newton's law of gravitation, which explains the attraction between two objects based on their mass and distance from one another.

Theories are not absolute, however, and have certain exceptions for a prescribed range of conditions. For example, Newton's law of gravitation is not accurate for very small or very massive objects or for objects that are very close together. Theories are an important part of science and are essential for understanding the natural world.

They provide explanations for observed phenomena and guide further research to deepen our understanding of the universe. Theories can also be modified or replaced when new evidence emerges that challenges their validity. Overall, scientific theories are based on empirical evidence and are the most widely accepted and reliable explanations for why natural phenomena occur.

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Answer:

They carry out essential functions that are necessary for the survival of cells – harvesting energy, making new proteins, getting rid of waste. Hope this helps!

Explanation:

I organelles is a specialized subunits with a specific cell, their general function is to store genetic information

The distance among the two slits is 1.73 x 10⁻³ cm.

The third black fringe will appear 0.627 cm from the center of the dazzling fringe.

(a) The distance between the central bright fringe and the third bright fringe is given by:

Δy = (nλD) / d

where Δy is the distance between the central fringe and the nth bright fringe, λ is the wavelength of the light, D is the distance between the slits and the screen, and d is the distance between the slits.

Substituting the given values, we get:

3.11 cm = (1 x 632.8 nm x 85.0 cm) / d

Solving for d, we get:

d = (1 x 632.8 nm x 85.0 cm) / 3.11 cm = 1.73 x 10⁻³ cm

Therefore, the distance between the two slits is 1.73 x 10⁻³ cm.

(b) The distance between the central bright fringe and the nth dark fringe is given by:

Δy = [(2n - 1)λD] / (2d)

where Δy is the distance between the central fringe and the nth dark fringe, λ is the wavelength of the light, D is the distance between the slits and the screen, and d is the distance between the slits.

Substituting the given values and n=3, we get:

Δy = [(2 x 3 - 1) x 632.8 nm x 85.0 cm] / (2 x 1.73 x 10⁻³ cm) = 0.627 cm

Therefore, the third dark fringe will occur 0.627 cm away from the central bright fringe.

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A. the distance between the two slits is approximately 12.8 micrometers. B. the third dark fringe will occur at a distance of approximately 0.557 cm from the central bright fringe.

Slit is a term used to refer to a long, narrow opening or gap. It is most commonly used to describe a thin cut in a piece of material or a surface. Slits are used in a variety of fields, including engineering, manufacturing, and architecture.

A. The distance between the two slits can be calculated using the equation:
d sinθ = mλ
First, we need to calculate the wavelength of the light using the frequency:
\(\lambda = c/f = (3.00 \times 10^8 m/s) / (6.32 \times 10^{14} Hz) = 4.74 \times 10^{-7} m\)
\(tan \theta = (3.11 cm) / (85.0 cm)\)
\(\theta = tan^{-1} (3.11 cm / 85.0 cm) = 2.10^{\circ}\)
Finally, we can substitute the values into the equation and solve for d:
\(d = m\lambda / sin\theta = (3)(4.74 \times 10^{-7} m) / sin(2.10^{\circ}) \approx 1.28 \times 10^-5 m = 12.8 \mu m\)
Therefore, the distance between the two slits is approximately 12.8 micrometers.

B. The distance from the central bright fringe to the third dark fringe can be calculated using the equation:
\(y = (m + 1/2) (\lambda d)\\y = (m + 1/2) (\lambda D/d) = (3 + 1/2) (4.74 \times 10^{-7} m) (85.0 cm) / (12.8 \times 10^{-6} m) \approx 0.557 cm\)
Therefore, the third dark fringe will occur at a distance of approximately 0.557 cm from the central bright fringe.

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Answer:

155mEq/L Cl-

Explanation:

A Ringer’s solution contains the following concentrations of cations: 146 mEq/L of Na+, 5 mEq/L of K+, and 4 mEq/L of Ca2+.

As Cl- is the only counterion of those cations:

For Na, the molecule is NaCl and the mEq/L of Cl- = mEq of Na+. The Cl- of the first ion is 146mEq/L Cl-

For K+, The molecule is KCl, mEq Cl- = 5mEq/L Cl-

And, for Ca2+, The molecule is CaCl2 but the equivalents of Ca2+ = Equivalents of Cl- = 4mEq/L Cl-

The total concentration of Cl- are:

146 + 5 + 4 =

42000 kilometers

Explanation:

distance is velocity × time

28000 ×1.5

42000

remember to match units

thats why i wrote 1.5 hours instead of 90minutes

The work done by the man against gravity in climbing to the top is 9,480 foot-pounds.

To calculate the work done by the man, we need to determine the total change in potential energy as he climbs up the helical staircase that encircles the silo. The potential energy can be calculated using the formula PE = mgh, where m represents the mass, g represents the acceleration due to gravity, and h represents the height.

In this case, the mass of the man is 190 lb, and the height of the silo is 80 ft. Since the man makes exactly four complete revolutions around the silo, we can calculate the circumference of the helical staircase. The circumference of a circle is given by the formula C = 2πr, where r represents the radius. In this case, the radius of the silo is 15 ft.

To find the work done against gravity, we need to multiply the change in potential energy by the number of revolutions. The change in potential energy is obtained by multiplying the mass, the acceleration due to gravity (32.2 ft/s²), and the height. The number of revolutions is four.

Therefore, the work done by the man against gravity in climbing to the top can be calculated as follows:

Work = 4 * m * g * h

    = 4 * 190 lb * 32.2 ft/s² * 80 ft

    = 9,480 foot-pounds.

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Answer:

The ball hit with 12N

Explanation:

Just took the quiz and got it right

Answer:

D

Explanation:

im guessing here i hope it is correct and good luck