if the worm gear in figure p12.19 are made of cast iron and bronze respectivly, will they be satisfactory from the wear standpint

Answer:

H= Mass × specific heat capacity ×change in temperature

= 2×380×(10-0)

=2×380×10

=7600 Joules

Answer:

70

Explanation:

right...

Answer:

120

………………..........................................

Think about the end of the world! Venus is circling the sun at a very close distance. And no, having shorter days or a shorter year to orbit the sun does not spell the apocalypse: but the Earth that is burning... literally!

So these would most likely happen to Earth if it were moved to the location of Venus:

Image: Venus, a hot planet rich in carbon dioxide vs. Earth, a planet rich in water and oxygen

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When static electricity is created with a balloon, it involves the separation of electric charges. This occurs when the balloon rubs against another object, such as hair or clothing, causing the transfer of electrons. The rubbing action causes electrons to be transferred from one object to the other, resulting in a buildup of positive charges on one object and negative charges on the other.

In the case of a balloon being rubbed against hair, for example, the balloon becomes negatively charged (excess electrons) while the hair becomes positively charged (deficit of electrons). These opposite charges create an electric field between the balloon and the hair, causing an attraction between them.

When the charges try to move back together, they are essentially trying to neutralize the separation of charges and restore electrical balance. In this case, the excess electrons on the balloon and the deficit of electrons on the hair want to redistribute and reach a state of equilibrium.

The movement of charges back together can occur through various mechanisms, such as:

1. Discharge: If the pathway for charges to flow between the objects is available, such as through a conductor, the excess electrons on the balloon can flow towards the hair, neutralizing the charges. This discharge can result in a small electric shock or spark.

2. Induction: The charges can also redistribute through the process of induction, where the electric field of the charged balloon induces opposite charges in the hair without direct contact. This can cause the hair strands to be attracted to the balloon, as they acquire a slight positive charge.

In either case, the charges will move back together until the separation is minimized or eliminated. The movement of charges is driven by the principle of electrical attraction and the tendency to reach a state of electrical balance.

It is important to note that the movement of charges back together is a temporary phenomenon in the case of static electricity. Once the charges have neutralized, the objects will no longer exhibit static electricity unless another separation of charges occurs through rubbing or other mechanisms.

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Answer:

a little to late

Explanation:

srry

Answer:

Surround the area of fire with water so the fire cant spread.  And after, pour water on the fire.  Always surround the fire first to stop it from spreading.  When handling fire there are no specific "safe" ways but this is probably the best way to go orby fire estinguisher which is probably the easiest if you have one nearby which usually you should or do have.

I hope I helped.  Pls mark brianliest if it helps.  Bye, take care:)

The noise from a 1.0 t mri scanner is five times more intense than the noise from a vacuum cleaner. Intensity of sound is measured as the quantity of sound per unit of perpendicular space.

W/m2, the SI unit for sound intensity, indicates I, the direction in which sound waves travel (watt per square meter). Sound intensity is often measured in Watts per square metre (W/m2). In order to determine how much sound energy a certain amount of noise emits in the air where the listener is standing, the standard definition incorporates calculation. The relative intensities of two sounds stated in bels are what the logarithm of the intensity ratio equals as a result.

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True. Electromagnetic waves are a type of energy that can travel through space at the speed of light.

These waves have different wavelengths and frequencies, which determine their properties and behavior. The electromagnetic spectrum includes radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays, each with its own unique frequency and wavelength. The different wavelengths and frequencies of electromagnetic waves give them different properties and uses in various fields, such as communication, medicine, and astronomy. The ability to manipulate electromagnetic waves by adjusting their wavelength and frequency is a fundamental principle behind many modern technologies. Therefore, it is true that electromagnetic waves come in many wavelengths and frequencies.

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When a sodium atom is in its lowest energy excited state, it can emit light because of a phenomenon known as spontaneous emission. In this process, an excited electron within the atom drops down to a lower energy level, releasing the excess energy in the form of a photon (light).

The amount of energy released by the electron determines the frequency of the emitted photon, which corresponds to a specific color of light.

In the case of sodium, the electron that is excited to its lowest energy state has an energy level that is slightly higher than the ground state. When this electron drops back down to the ground state, it releases energy in the form of a yellow-orange photon with a wavelength of about 589 nanometers.

This process is fundamental to the emission of light in many natural and artificial light sources, including fluorescent bulbs, lasers, and even stars. It is also essential for the absorption of light in photosynthesis and the transmission of information in optical fiber communication.

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Answer:

Explanation:

If the question is set up correctly here, we can solve this correctly.

Lightning and Thunder Data

Occurrence Lightning

Observed Thunder Heard Distance to ---- We need this

Lightning (m)

A 8:00:00 p.m. 8:00:01 p.m. 330

B 5:30:00 p.m. 5:30:04 p.m. 1,320

C 6:45:00 p.m. 6:45:06 p.m. 1,980 ---- We need this

D 7:20:00 p.m. 7:21:00 p.m. 19,800

6:45:06 - 6:45:00 = 6

So 6 seconds. We also get 1980. So we do 1980/6, which is 330(m)?

If the unit is meters, then the sound of thunder travels at 330(m)

Answer:

See below

Explanation:

It is a graph on the x -y coordinate system with (generally ) the y-axis is labelled 'velocity'   and the x - axis is 'time'   <==== with this, you can look at the time and find the velocity at that time on the graph

Answer:

less than one light year

Explanation:

earth is 0.00001581 light years away from the sun :)

The acceleration of the object is 0.926 m/s².

The electric force experienced by the object is the product of charge and electric field of the object and it is given as;

F = Eq

where;

F = 4900 x 8.5 x 10⁻⁹

F = 4.165 x 10⁻⁵ N

The acceleration of the object is determined by applying Newton's second law of motion as follows;

a = F/m

a = (4.165 x 10⁻⁵ N) / (4.5 x 10⁻⁵ kg)

a = 0.926 m/s²

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the total amount of energy coming from the Sun is approximately 1361 watts per square meter.

The sun is a powerful source of energy that emits radiation in all directions. This radiation includes visible light, ultraviolet light, and infrared radiation. The amount of energy that reaches the Earth's surface depends on several factors, including the distance between the Earth and the sun, the angle at which the radiation strikes the Earth's surface, and atmospheric conditions.

Scientists have calculated the total amount of energy that the sun emits per unit of time, which is known as the solar constant. The solar constant is approximately 1,366 watts per square meter. This means that if you could capture all of the energy from the sun that falls on a square meter of the Earth's surface, it would generate 1,366 watts of power.

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Answer:

The difference in airspeed over the top and bottom of an airplane wing results in a difference in air pressure, which generates lift. The Bernoulli's equation relates the pressure of a fluid (including air) to its velocity and the height of the fluid:

P + 1/2 * rho * v^2 + rho * g * h = constant

where P is the pressure of the fluid, rho is the density of the fluid, v is the velocity of the fluid, g is the acceleration due to gravity, and h is the height of the fluid.

Assuming that the density of air is constant and the height of the wing is negligible compared to the other terms in the equation, we can simplify the equation to:

P + 1/2 * rho * v^2 = constant

The constant in the equation is the same at all points along the wing, since the air is a continuous fluid.

The pressure difference between the top and bottom of the wing can be found by calculating the pressure at the top and bottom of the wing using the simplified Bernoulli's equation, and then taking the difference between the two pressures.

Let P1 be the pressure at the bottom of the wing, where the airspeed is 130 m/s, and P2 be the pressure at the top of the wing, where the airspeed is 170 m/s. Then we have:

P1 + 1/2 * rho * (130 m/s)^2 = P2 + 1/2 * rho * (170 m/s)^2

Simplifying and rearranging, we get:

P1 - P2 = 1/2 * rho * (170 m/s)^2 - 1/2 * rho * (130 m/s)^2

Plugging in the density of air (rho = 1.225 kg/m^3), we get:

P1 - P2 = 1/2 * 1.225 kg/m^3 * (170 m/s)^2 - 1/2 * 1.225 kg/m^3 * (130 m/s)^2

Simplifying and calculating, we get:

P1 - P2 = 377.72 Pa

Therefore, the difference in pressure between the top and bottom of the wing is approximately 377.72 Pa.

1. D

2. B

3. D

No 4?

5. C

The thickness of the shifter is given as t = λ / 2n.

The given equation of the phase of light of wavelength λ traveling through a shifter with a refractive index n is given by: Øs = 2πntλ-1, where t is the thickness of the shifter.

The phase of the same light wave traveling through air for a distance equal to t is Øa= 2ntλ-1.

We are supposed to derive an expression for the thickness of the shifter as a function of λ and n to get a phase shift of 180°.

Given, The phase of light of wavelength λ traveling through a shifter with a refractive index n is given by: Øs = 2πntλ-1

The phase of the same light wave traveling through air for a distance equal to t is Øa = 2ntλ-1

To obtain a phase shift of 180°, we have: Øs - Øa = πi where i is an integer.

Substituting the value of Øs and Øa in the above expression, we have:

2πntλ-1 - 2ntλ-1 = πi2πntλ-1 - 2ntλ-1

                         = π(2nλt) / λ2πntλ-1

                         = 2nλt / λπt

                         = λ / 2n

Hence, the thickness of the shifter is given as t = λ / 2n.

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In a high-tension ignition system, a primary capacitor of too low a capacity will cause the breaker contacts to be burnt up.

System voltages greater than 12kV, but often in the range of 18kV to 26kV, describe high-tension systems.

When analyzing the life of an igniter or ignition system, the energy provided by the exciter is the most important variable.

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Romanesque painting style was prominent from the 10th to the 12th century in Europe. It was a part of the overall Romanesque art movement that occurred during this period.

The following are the best descriptions of the Romanesque painting style:

The Romanesque painting style emphasized three-dimensionality and lifelike representation.

The Romanesque painting style is a stylized and decorative style that was used to depict biblical themes, and images were stylized and decorative.

The Romanesque painting style includes decorative and ornamental elements, with gold leaf and bright colors used to create illuminated and decorative manuscripts.

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Answer:

Interpersonal skills

Explanation:

Answer:

The right answer is interpersonal skills

Explanation:

give the other person brainliest they deserve it

When the object is a sphere of Radius R and mass M the 60% of its total kinetic energy is its translational kinetic energy.

The kinetic energy of an object is termed as the energy it posses because of its motion.

The translational kinetic energy is the energy required to move or accelerate the object from its position of rest.It is described as the effort required to move a mass-determined body from rest to the indicated velocity.

The moment of inertia of the object will be⇒I =2/3MR2

Sphere is rolling without slip ,v=Rω (v= speed of centre of mass and ω is angular speed)

Translational KE =1/2Mv2

Rotational KE = 1/2Iω2=1/2(2/3MR2)x(V/R)2=1/3Mv2

Total KE= 1/2Mv2 +1/3Mv2 =5/6 Mv2

Now % of Translational Energy= 1/2Mv2 ÷ 5/6 Mv2 x100 = 60%

Hence, when the object is a sphere of Radius R and mass M the 60% of its total kinetic energy is its translational kinetic energy.

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Answer:

The number of protons is correct

Answer:

The number of protons

Explanation:

I took the test buddy boy

Answer:

The altitude of the plane is 379.5 m.

Explanation:

Initial horizontal velocity, u = 59.1 m/s

Horizontal distance, d = 521 m

let the time taken by the packet to cover the distance is t.

Horizontal distance = horizontal velocity x time

521 = 59.1 x t

t = 8.8 s

let the vertical height is h .

Use second equation of motion in vertical direction.

\(h = u t + 0.5 gt^2\\\\h = 0 + 4.9 \times 8.8\times8.8\\\\h= 379.5 m\)

Answer:

1) 4 x 25m = 100m

2) 0 because after 4 lengths, he's back at the starting block.

3) speed is distance over time so speed here is 100m/125s = 0.8m/s

4) ...

5) 100m / 1.25m/s = 80s

6.a) 100m / 0.5m/s = 200s

7.b) ... can't draw this now..

Explanation:

They were formed by accretion

Answer:

(For me they were formed by God.)

Planets are believed to have formed through the accumulation of a large number of small bodies. The orbits of these cores then evolve into orbits that resemble those of Uranus and Neptune, as a result of gravitational interactions with the small bodies in the outer disk of the protosolar nebula.

Explanation:

Brainliest plz

Answer:

A thumb only has one joint and two phalanges. The thumb is referred to as “the big finger".

Brainlist pls!

Answer:

26.6 m/s

Explanation:

\(v = r \alpha \\ v = r( \frac{2\pi}{t} ) \\ v = (55)( \frac{2\pi}{13} ) \\ v = 26.6 \: m {s}^{ - 1} \)

The relative velocity of the athlete relative to the ground is 5.2 m/s

The given parameters;

constant velocity of the athlete, V = 5.2 m/s

let the velocity of the ground = Vg = 0

The relative velocity concept helps us to determine the velocity of a moving object relative to a stationary observer.

The athlete is the moving object in this question while the ground is stationary.

The relative velocity of the athlete relative to the ground is calculated as follows;

\(V/V_g = V - V_g = 5.2 - 0 = 5.2 \ m/s\)

Thus, the relative velocity of the athlete relative to the ground is 5.2 m/s

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