when approaching a railroad crossing with no warning device, the speed limit is ___

Answer:

space

Explanation:

I got it right on E d i n u i t y

A space telescope called the Hubble was put into low-Earth orbit. Therefore, Hubble telescope is located in space.

A space telescope called the Hubble was put into low-Earth orbit around 1990 and continues to be in use today. Although it wasn't the initial space telescope, it is one of the biggest and most useful ones. It is famous for being both an essential scientific instrument and a public relations success for astronomy.

One of NASA's Big Observatories, the Hubble telescope being dedicated after astronomer Edwin Hubble. Hubble's targets are chosen by the Space Telescope Scientific Institute, which also handles the data processing, while the spacecraft is managed by the Goddard Space Flight Center at NASA. Hubble telescope is located in space.

Therefore, Hubble telescope is located in space.

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Answer:

The International Mineralogical Association (IMA) currently recognizes 5,327 distinct mineral species. Some, such as the major rock-forming silicates and carbonates, are well known and found in abundance the world over. But most are documented based on just a few known occurrences

(c) Total internal reflection occurs

when the incident angle is greater than the critical angle.

The final volume of water in the container after increasing the temperature is 203.8 m³.

From the given,

The initial volume of water (Vο) = 200 cm³

Initial temperature = 4°C = 4+273 = 277K

Final temperature = 95°C = 273+95 = 368 K

Volume expansion co-efficient = 210×10⁻⁶(°C)⁻¹

Final volume =?

β = 1/Vο (ΔV/ΔT),  β represents the volume expansion coefficient, ΔV change in volume, ΔT is the change in temperature, and Vο is the initial volume.

ΔV = β×Vο×ΔT

     = 210×10⁻⁶×200×(368-277)

    =  210×10⁻⁶×200×91

ΔV = 3.83 m³

ΔV = final volume - initial volume

final volume = ΔV + 200

                    = 3.82 +200

                    = 203.82 m³

Final volume = 203.82 m³.

Thus, the final volume of the water is 203.82 m³.

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Answer:

Patterson isolated lead from fragments of a meteorite that had struck Earth thousands of years ago, and determined the age of the fragments by analyzing proportions of the lead isotopes. The meteorite is assumed to have been formed at the same time as the rest of the solar system, including Earth

Explanation:

The text can be interpreted in many different ways. The medium used gives the best interpretation of the play is script for stage or film. The medium that would give best interpretation is film.

Stage work involves acting in front of the audience. It is the live performances given by the actors.

Films are recorded acts that are displayed on the screens.

Cinema is a better medium when it comes to interpreting the play.

The audio version lacks the key elements such as sound effects and emotional expression. On the other hand, the film uses lighting and facial expressions to convey certain themes, emotions and also certain feelings.

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The car’s velocity at the end of this distance is 18.17 m/s.

Given the following data:

To find the car’s velocity at the end of this distance, we would use the third equation of motion;

Mathematically, the third equation of motion is calculated by using the formula;

\(V^2 = U^2 + 2dS\)

Substituting the values into the formula, we have;

\(V^2 = 22 + 2(1.4)(110)\\\\V^2 = 22 + 308\\\\V^2 = 330\\\\V^2 = \sqrt{330}\)

Final velocity, V = 18.17 m/s

Therefore, the car’s velocity at the end of this distance is 18.17 m/s.

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Answer:

Explanation:

Time for one dot = 1 /50 = .02 s

Distance between 3 rd and fourth dot is 3 cm and time taken to travel this distance is .02 s

velocity = 3 cm / .02 = 150 cm /s

Distance between 4 th and 5 th  dot is 4 cm and time taken to travel this distance is .02 s

velocity = 4 cm / .02 = 200 cm /s

change in velocity = 200 cm/s  - 150cm/s = 50 cm /s

Time taken = .02 s

Acceleration = 50 / .02 cm/s²

= 2500 cm/s²

The slope of a cold front is steeper than that of a warm front.

A warm front and a cold front are two different fronts associated with a mid-latitude low-pressure system. A cross-sectional view of these fronts can be helpful in better understanding their characteristics and structure. Let's take a look at the horizontal cross-section of these fronts:

Image showing the Horizontal Cross section of a warm front and a cold front for a mid-latitude low pressure system:

The 150 isobar is shown in bold.

The vertical structure of a warm front:

In a mid-latitude low-pressure system, a warm front represents the leading edge of a warm, moist air mass as it approaches a region of cold, dry air. In general, the warm air moves toward the cold air in the form of a low-level wedge. The warm front is associated with a gradual decrease in temperature and pressure as one moves from the warm side to the cold side of the front. The steepness of the frontal slope is gradual. The slope is gradual because the warm air rises over the cool air.

The vertical structure of a cold front:

A cold front represents the leading edge of a cold, dry air mass as it advances toward a region of warm, moist air. It is usually associated with a line of clouds, precipitation, and thunderstorms. The frontal slope is steeper than that of a warm front, with a temperature drop of several degrees Celsius per kilometer of ascent. The cold air moves in a downward motion to the ground and forces the warm air up. This motion creates clouds, precipitation, and sometimes thunderstorms. Therefore, the slope of a cold front is steeper than that of a warm front.

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Answer:

CLAIM: When you eat the hamburger, your body uses it and breaks it down which is chemical energy than use that food for energy for mechanical energy which makes thermal energy

EVIDENCE: This happens every day to people across the world and also it is scientifically proven

REASONING: The reason why this evidence supports it is because as I said  it happens everyday and when you feel energized after and apple after you were lazy that just happened

Explanation:

Answer:

t= 7.88

Explanation:

Starting with F=ma.

The only force that is going to cause an acceleration is gravity (if we use the coordinate system I described).

F = ma

mgsin65 = ma

a = gsin65

Vf = Vi + at

0 = 35 m/s + (gsin65)t

t = 35/gsin65

multiply it by 2 to get whole time

t = 70/gsin65

t = 7.88 seconds.

When discharging equivalent of 0% starting voltage will the capacitor reach after 5RC.

V(t) = V0e-t/RC = V0b initially.

The numerous kinds of capacitors and their applications.

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The initial speed of a shopping cart is 36 m/s.

What is acceleration?

Acceleration is the term used to describe how quickly a velocity's speed and direction change over time. It is said to have been accelerated when something changes its direction and moves faster or slower. Motion on a circle accelerates even when the speed is constant because the direction is constantly changing.

What is kinematic equation?

The set of equations known as the kinematic equations describes how an object moves with constant acceleration. Integrals, rates of change, and derivatives must be understood in order to solve kinematic equations.

List the known and unknown values.

u = initial velocity = 20 m/s

v = final velocity = ? m/s

a = acceleration = 4 m/s²

t = time interval = 4 s

s = displacement = ? m

The following kinematic equation should be used to determine the final velocity.

v = u + at

v = 20 m/s + (4 m/s² × 4 s) = 36 m/s

Now calculate the displacement using the following kinematic equation.

s = ut + ½at²

s = (20 m/s × 4 s) + (0.5 × 4 m/s² × (4 s)²)

s = 80 m + 32 m = 112 m

Therefore, the initial speed of a shopping cart is 36 m/s.

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search it or use answers, really helps!!

Answer:

The only difference between the two is that the frequency of X-rays is very much higher than radio waves. If, on the other hand, the radio waves or X-rays are propagating through a medium other than the vacuum, their speed will generally be less than c and will depend upon the specific properties of the medium.

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

m is the mass

v is the velocity

From the question we have

\(k = \frac{1}{2} \times 2.55 \times {3.81}^{2} \\ = 1.275 \times 14.5161 \\ = 18.5080275\)

We have the final answer as

Hope this helps you

This statement is partially correct. It takes less and less time to fuse heavier elements up to iron inside a high-mass star, but beyond iron, fusion requires energy instead of releasing energy and is not sustainable.

It takes less and less time to fuse heavier and heavier elements inside a high mass star. Iron is the most stably bonded atomic nucleus. When a stellar iron core collapses, large numbers of neutrinos are formed, and then: they immediately pass through the core and escape to space.

Higher mass stars will switch from helium to carbon burning and extend their lifetimes. Even higher mass stars will burn neon after carbon is used up. However, once iron is reached, fusion is halted since iron is so tightly bound that no energy can be extracted by fusion

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Answer:

The maximum height above the bottom of the ramp is 1.3 m.

Explanation:

Energy loss to friction

The energy lost to friction by the skateboarder is calculated from the change in kinetic energy of the skateboarder.

ΔK.E = K.Ef - K.Ei

ΔK.E = ¹/₂m(vi² - vf²)

ΔK.E = 0.5 x 55 (4.1² - 6.5²)

ΔK.E = -699.6 J

Maximum height above the bottom of the ramp

The maximum height above the bottom of the ramp is determined from conservation of energy.

mghi + ¹/₂mvi² = ¹/₂mvf² + mghf

55 x 9.8 x hi  +  (0.5 x 55 x 6.5²) = (0.5 x 55 x 4.1²) + (55 x 9.8 x 0)

539hi + 1161.88 = 462.28

539hi =  -699.6

hi = -699.6/539

hi = -1.3 m

Thus, the maximum height above the bottom of the ramp is 1.3 m.

To calculate the intensity of the light source for the viewer after being reflected at point (0, 0, 0), we can use the inverse square law for light intensity.

The formula for the intensity of light at a certain distance from the source is given by:

I = I₀ / d²

Where:

I is the intensity of light at a certain distance

I₀ is the initial intensity of the light source

d is the distance from the light source to the point of observation

First, let's calculate the distance from the light source to the point of reflection (0, 0, 0). Using the distance formula, we have:

d₁ = √[(-4 - 0)² + (3 - 0)² + (0 - 0)²]

= √[16 + 9 + 0]

= √25

= 5

Next, let's calculate the distance from the point of reflection (0, 0, 0) to the viewer (2, 2, 2):

d₂ = √[(2 - 0)² + (2 - 0)² + (2 - 0)²]

= √[4 + 4 + 4]

= √12

= 2√3

Now, we can calculate the intensity of the light for the viewer after reflection using the inverse square law:

I_viewer = I₀ / (d₁ + d₂)²

= 1000 / (5 + 2√3)²

To simplify the expression, we can rationalize the denominator:

I_viewer = 1000 / (5 + 2√3)²

= 1000 / (25 + 20√3 + 12)

= 1000 / 37 + 20√3

Therefore, the intensity of the light source for the viewer, after being reflected at point (0, 0, 0), is approximately 27.03 lux.

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Answer:

1.2m/s

Explanation:

two speeds added together divided by total time.

Answer:

A

Explanation:

Molecules is made up from and atom is made up with three tiny elements: protons, neutrons, and electron.

Statement A correctly describes what atoms and molecules are made of.  Molecules are made of atoms, and atoms are made of protons, neutrons, and electrons.

The atom consists of matter that may be split without releasing electrical charges.

It's also the smallest unit of matter with chemical element features. As a result, the atom is the fundamental unit of science.

In the nucleus, proton and the neutron is existing. The condition of the atom to be electrically neutral is that the number of the proton and electron should be the same.

Molecules are made of atoms, and atoms are made of protons, neutrons, and electrons.

Hence, statement A correctly describes what atoms and molecules are made of.  

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Newton's Second Law of Motion states "The rate of change of momentum of a body is directly proportional to the applied unbalanced force in the direction of force".

The speed of object A at the end of the ramp is approximately 25.39 m/s.

Part (a) The two objects, A (solid cylinder) and B (hollow cylinder), will reach the bottom of the ramp at the same time.

The time it takes for an object to reach the bottom of a ramp depends on its mass distribution and shape, not on whether it is solid or hollow.

In the absence of any other information, we can assume that both objects have similar mass distributions and roll without slipping, resulting in them reaching the bottom of the ramp simultaneously.

Therefore, the answer is 3) They will reach the bottom at the same time.

Part (b) To calculate the speed of object A at the end of the ramp, we can use the principle of conservation of energy.

The potential energy at the beginning of the ramp is converted into kinetic energy at the bottom of the ramp.

The potential energy (PE) at the beginning of the ramp is given by:

PE = m * g * h

where m is the mass of object A, g is the acceleration due to gravity, and h is the height of the beginning of the ramp.

Mass of object A (m) = 340 g = 0.34 kg

Radius of object A (r) = 31 cm = 0.31 m

Height of the beginning of the ramp (h) = 41 cm = 0.41 m

Acceleration due to gravity (g) = 9.8 m/s²

The potential energy at the beginning of the ramp is:

PE = 0.34 kg * 9.8 m/s² * 0.41 m

PE ≈ 1.375 J

At the bottom of the ramp, the potential energy is fully converted into kinetic energy:

KE = 1/2 * I * ω²

where I is the moment of inertia of the object and ω is the angular velocity.

For a solid cylinder, the moment of inertia is given by:

I = (1/2) * m * r²

Substituting the given values:

I = (1/2) * 0.34 kg * (0.31 m)²

I ≈ 0.0169 kg·m²

Since the object rolls without slipping, the linear speed (v) can be related to the angular velocity (ω) by the equation:

v = ω * r

Solving for ω:

ω = v / r

The linear speed at the end of the ramp is equal to the radius times the angular velocity.

Substituting the values:

v = (1.375 J / 0.0169 kg·m²) * 0.31 m

v ≈ 25.39 m/s

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Answer:

40 gm

Explanation:

size one   is     1/3 of size 3  

 so the mass is also 1/3

     1/3 * 120 gm = 40 gm

Answer:

The resultant force will be 5 N in the South West Direction.

Explanation:

If we have two vectors A and B, their resultant is:

\(\boxed{ \mathsf{Resultant = A^2+B^2+2AB\:cos(\theta)}}\)

\(\theta\) is the angle between A and B

Since, Force is a vector quantity, the answer to he given diagram will be thought out by Vector Laws of Addition.

6N and 9N are in opposite directions, so their resultant will simply be their difference, and it will be pointing in the direction of the vector with larger magnitude.

= 9 - 6

= 3 N

Now, we have two vectors. one of magnitude 4N pointing towards West and the other of magnitude 3N pointing towards South.

It's magnitude will be equal to \(\mathsf{\red{ \sqrt{4^{2} +3^{2} } }}\)

(as cos90=0, we're left with the sum of the squares of the two vectors)

= 5N

Therefore, the resultant force will be 5N towards the South-West.

The total work done by the gas from D to E to F is 450J

To calculate the total work done by the gas as it undergoes a change in state from point D to point E to point F, we need to consider the changes in pressure and volume.

The change in pressure (DF) is determined by subtracting the initial pressure of 300 N/m^2 from the final pressure of 600 N/m^2, resulting in a pressure difference of 300 N/m^2.

Similarly, the change in volume (FE) is calculated by subtracting the initial volume of 2.0 m^3 from the final volume of 5.0 m^3, resulting in a volume difference of 3.0 m^3.

Using the formula for the area of a triangle, we can determine the work done by the gas during the process.

The area of triangle DEF is half of the product of the pressure difference and the volume difference, which results in a value of 450 J.

Therefore, the total work done by the gas from D to E to F is calculated as 450 J

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Answer:

is d

Explanation:

Answer:

\(V_y = 16.44\ m/s\)

\(V_y = 7.32\ m/s\)

Explanation:

Given

\(\theta = 24\)

\(Velocity\ (V) = 18m/s\)

Required

Determine the vertical and horizontal components

The vertical (Vy) and horizontal (Vx) components is calculated as thus:

\(V_x = Vcos\theta\)

\(V_y = Vsin\theta\)

Calculating Vertical Components:

\(V_y = Vsin\theta\)

\(V_y = 18 * sin24\)

\(V_y = 18 * 0.40673664307\)

\(V_y = 7.32125957526\)

\(V_y = 7.32\ m/s\) --- Approximated

Calculating Horizontal Components:

\(V_x = Vcos\theta\)

\(V_x = 18 * cos24\)

\(V_x = 18 * 0.91354545764\)

\(V_x = 16.4438182375\)

\(V_x = 16.44\ m/s\) --- Approximated

A wave's period is the amount of time it takes for two crests to pass one wavelength apart at a certain location.

The formula for wave period is wavelength divided by velocity since the periods indicate that a wave's period is the inverse of its frequency. The frequency of a wave is measured in 1/s, often known as Hertz, whereas the period of a wave is measured in seconds (s) (Hz).

Each wave, period is typically expressed in seconds. Speed (V) divided by wavelength (V) yields the period (T) (S). Divide the length by the speed, for instance, 12 m divided by 6 m/s = 2 s to determine the period of a wave with a speed of 6 m/s and a wavelength of 12 m.

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Temperature is increased the pressure also increases due to fast movement of molecules because of more energy.

The temperature of the gas is directly proportional to the pressure. Faster moving particles will collide with the walls of the container that put force on the wall which leads to increase in pressure.

So we can conclude that temperature is increased the pressure also increases due to fast movement of molecules because of more energy.

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