A car comes to a bridge during a storm and finds the bridge washed out. The driver must get to the other side, so he decides to try leaping it with his car. The side the car is on is 21.3 m above the river, whereas the opposite side is a mere 2.3 m above the river. The river itself is a raging torrent 54.0 m wide.what is the speed of the car just before it lands safely on the other side?

Answer:

The answer is D

Explanation:

Answer:

A

Explanation:

The statement "Light and material objects always interact in some way when light is incident" is true because this interaction can include reflection, refraction, absorption, scattering, and transmission of light.

Light and material objects always interact in one way or another. When light is incident on a material object, it can be transmitted through the object, reflected off the object, or absorbed by the object. The interaction of light with a material object depends on the properties of the light and the properties of the material object.

For example, visible light is transmitted through glass, but it is reflected off of a mirror. Visible light is absorbed by a black object, which is why black objects appear black.

The interaction of light with a material object can be used to create a variety of effects, such as images, colors, and shadows.

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The density of the ga when it condense while put it in a refrigerator, When it cool, it condense and become a liquid, has decreases.

The mass of a material substance per unit volume is referred to as its density. The formula d = M/V, where d stands for density, M for mass, and V for volume, describes density. The measurement for density is grams per cubic centimeter. For instance, water has a density of 1 grams per cubic centimeter as opposed to Earth's density of 5.51 grams. Kilograms per cubic meter is another way to measure density (in meter-kilogram-second or SI units). Density makes it simple to calculate the relationship between mass and volume. For instance, M = Vd is the formula for calculating a body's mass, while V = M/d is the formula for calculating a body's volume.

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A given convex lens has a focal length that varies slightly with the wavelength of the light passing through it. when the a lens is used as the objective of a telescope, this results in chromatic aberration.

Chromatic aberration is a phenomenon in which light rays passing through a focus of lens at different points, depending on their wavelength. It is a failure of a lens to focus all colors to the same point. It is also called chromatic distortion and spherochromatism. The focal length of the lens varies directly with the wavelength of the light so focal length increases with wavelength but decreases with refractive index as wavelength is inversely related to it. This is the principal cause of chromatic aberration phenomena.

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A frictionless piston-cylinder device contains 7.5 liters of saturated liquid water at 275 kPa. An electric resistance is turned on until 3050 kJ of energy is transferred to the water.

i) The mass of water can be determined by using the specific volume of saturated liquid water at the given pressure and volume. By using the specific volume data from the steam tables, the mass of water is calculated to be 6.66 kg.

ii) To find the final enthalpy of water, we need to consider the energy added to the water. The change in enthalpy can be calculated using the energy equation Q = m(h2 - h1), where Q is the energy transferred, m is the mass of water, and h1 and h2 are the initial and final enthalpies, respectively. Rearranging the equation, we find that the final enthalpy of water is 454.55 kJ/kg.

iii) The final state and the quality (x) of water can be determined by using the final enthalpy value. The final enthalpy falls within the region of superheated vapor, indicating that the water has completely evaporated. Therefore, the final state is a superheated vapor and the quality is 1 (x = 1).

iv) The change in entropy of water can be obtained by using the entropy equation ΔS = m(s2 - s1), where ΔS is the change in entropy, m is the mass of water, and s1 and s2 are the initial and final entropies, respectively. The change in entropy is found to be 10.13 kJ/kg.

v) The process described is irreversible because the water started as a saturated liquid and ended up as a superheated vapor, indicating that irreversibilities such as heat transfer across a finite temperature difference and friction have occurred. Therefore, the process is irreversible.

On a P-v diagram, the process can be represented as a vertical line from the initial saturated liquid state to the final superheated vapor state, crossing the saturation lines.

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The option that is not a requirement for the National Weather Service (NWS) to determine if a thunderstorm is severe is "frequent cloud to ground lightning" .

What is a thunderstorm ?

The thunderstorm is defined as "a rain-bearing cloud that also produces the lightning" .

and for the National Weather Service (NWS) a thunderstorm is termed as "severe" when it has the following :

(a) hail one inch or greater,

(b) winds gusting in excess of 50 knots (57.5 mph), or

(c) a tornado.

So , the only condition that is not for the severe thunderstorm is frequent cloud to ground lightning .

Therefore , the correct option is (a) .

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Answer:

If and then for example: If you get at least 6 hours of sleep, you will do better on tests than if you get less sleep.

Explanation:

The statement "iridium is not the heaviest atom found in nature" is correct, as there are heavier elements that have been synthesized in laboratories.

However, iridium is one of the densest elements found in nature, with a density of 22.56 grams per cubic centimeter. This density is due to the close packing of iridium atoms in a crystal lattice, which allows for a high mass-to-volume ratio.

Additionally, iridium has a relatively high atomic number and a tightly packed nucleus, which contributes to its high density. Therefore, a chunk of pure iridium can be considered the densest substance on earth, despite not being the heaviest atom found in nature.

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The combined mass of the package and the sled is 96.75 kg (A).

The specific heat capacity of the liquid is 2.51 x 10³ J/kg⁰C.

The specific heat capacity of the liquid is calculated as follows;

Q = mcΔФ

where;

c = Q/mΔФ

c = (65 x 120)/(0.78 x 3.99)

c = 2.51 x 10³ J/kg⁰C

The complete question is below:

An electrical resistor immersed in a liquid produces 65.0 W of electrical energy for 120 s. The mass of the liquid is 0.780 kg and its temperature increases from 18.55°C to 22.54°C. a) Find the average specific heat capacity of the liquid in this temperature range.

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As energy is transferred through a wave, water particles are set in a circular motion that is option C.

Water particles start to travel up or down as they join a wave. The energy of movement, or kinetic energy, has therefore been transmitted to them. The particles slow down as they go upward or downward towards the wave crest or trough, respectively, from their usual location. The energy of particles in a wave oscillates between kinetic and potential energy, therefore this indicates that some of their kinetic energy has been transformed into potential energy.

The frequency and wavelength of a wave are both measures of its energy, however this varies depending on the type of wave.

The most energetic waves in water are those that move quickly and have a long wavelength, like a tsunami. As speed is constant for electromagnetic waves, the most energetic waves are those with a high frequency and a short wavelength (like X-rays).

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A ball sitting still on the pitch obeys Newton's first law.

According to the first law of the Newton, a body would continue to be at rest or in state of uniform motion unless it is acted upon by an external force.

In this case, we have a football that is sitting still on a pitch. This ball is held by the force of inertia and the forces that act on it are balanced. If on the other hand this ball is not kicked (action of eternal force), it would continue to sit still on the pitch.

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Answer:25

Explanation:

Formula(77°F − 32) × 5/9 = 25°C

Answer: The answer is C. 298 K

Explanation:

Answer:

The mass of the eagle is about 5 Kg

Explanation:

1/2 M= Ke/V^2

120 km/h = 33.3333m/s

1/2 M = 2,800/33.3333^2

1/2 M = 2,800/ 1111.10888889

1/2 M = 2.52000504001

(2) 1/2 M = (2) 2.52000504h001

= M = 5.04001008002

About 5 Kilograms

The idea that the total work done on an object is equal to its final kinetic energy is sometimes true.

Work is defined as the transfer of energy that occurs when a force is applied to an object and it undergoes displacement in the direction of the force. The work done on an object is given by the equation:

Work = Force * Displacement * cos(θ)

where θ is the angle between the force and the displacement vectors.

The work-energy theorem states that the net work done on an object is equal to the change in its kinetic energy:

Net Work = ΔKE

In other words, the total work done on an object is equal to the change in its kinetic energy.

However, it's important to note that this applies specifically to the net work done on the object, taking into account all forces acting on it. If there are other forms of energy involved, such as potential energy or work done by non-conservative forces (e.g., friction), then the total work done on the object may not be equal to its final kinetic energy.

For example, in situations where non-conservative forces are present, such as friction or air resistance, some of the work done may be converted into other forms of energy (e.g., heat) rather than solely contributing to the object's kinetic energy.

The idea that the total work done on an object is always equal to its final kinetic energy is not true in all cases. While the net work done on an object does result in a change in its kinetic energy, other factors such as potential energy and work done by non-conservative forces can affect the total work done on the object and may not solely contribute to its final kinetic energy.

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24  is  the average Speed of the car.

What is an average speed and an illustration?

Calculating average speed involves dividing the total distance traveled by the time interval. For instance, if it takes a person 40 minutes to travel 20 miles north, 20 miles south, and finally 20 miles in between, their average speed is 40 miles divided by 40 minutes, or 1 mile per minute (60 mph).

     a flag at 160m

  t = 8

  d = 160/8

       = 20

   d2 = 240/8

        = 30

   the average Speed = 2d1 d2/d1+d2

                                     = 2 * 20 * 30/50

                                        = 24

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Answer:

hydrochlorine +12÷B to the power of 4 -× y reapeated zminus 2 to the power of 9

Answer:

K and H2

Explanation:

H2 is correct...

Thank you have a magnificent day ahead.

The quantity of heat required is 1229.1 J

The specific heat capacity of a substance is the quantity of heat required to increase the temperature of a unit mass of the substance by 1°C or 1k. it measure in J/kg/k.

The specific heat capacity of a substance is denoted by 'C'. And it is expressed as C = Q/m∆t

where ∆t is the change in temperature, Q is the quantity of heat energy required and m is the mass of the substance.

therefore Q=mCΔt

Q= 96.7× 0.874×(69.2-31.7)

Q= 1229.1J

Thereore the heat required to increase the temperature from 31.7°C to 69.2°C is 1229.1J

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answer:They are too close to the sun!

Explanation:Because Mercury is so close to the Sun and its gravity, it wouldn't be able to hold on to its own moon. Any moon would most likely crash into Mercury or maybe go into orbit around the Sun and eventually get pulled into it.Same with Venus!

So, the frequency of that spring-block oscillator is 0.40 Hz (D).

Hi ! Here, I will help you to explain about this question. Before continuing, let us recall, what is the meaning of frequency. Frequency is the number of vibrations that can be performed per second. In general, the frequency can be formulated by:

\( \boxed{\sf{\bold{f = \frac{n}{t}}}} \)

With the following condition :

However, the frequency can also be affected by the period of the vibration. The period is the time it takes to pass one vibrating phase. Because of their inversely related meanings, the relationship between frequency and period is expressed in the equation :

\( \boxed{\sf{\bold{f = \frac{1}{T}}}} \)

With the following condition :

We know that :

What was asked :

Step by step :

\( \sf{f = \frac{1}{T}} \)

\( \sf{f = \frac{1}{2.5}} \)

\( \boxed{\sf{f = 0.40 \: Hz}} \)

So, the frequency of that spring-block oscillator is 0.40 Hz (D).

Answer:

1000kg

Explanation:

I'm smart I am a genius I know everything so I know it is 1000kg

if the universe is 13.8 billion years old, how can we see 46 billion light years away because space has also been expanding?

When total distance to distant cosmic objects like galaxies is taken into account, their measurement is referred to as cosmological distance. This distance accounts for universe's ongoing expansion. Space itself stretches as a result of the universe's expansion, causing two things' distances to grow even when they are not physically moving apart.

One may observe objects that are currently positioned farther distant than the age of the universe thanks to this stretching of space. For a very long time, light emanating from these far-off objects has been travelling through space. Light has essentially travelled a greater distance than the actual physical distance between us and the object because of the universe's expansion during that time.

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Answer:

icebergs float on water because ice is less dense than water. The same is true for a boat: a boat floats on water because, overall, it is less dense than the water.

Explanation:

Answer:

During the evening, the land cools off more quickly than the water. The cooler land cools the air above it, while the warmer water warms the air above it. These differences in air temperature create the convection.

Explanation:

sorry I took forever

Cyclotron to make 1 milligram of the isotope fluorine-18 for use a a diagnostic tool with it PET scanner. It seems that the hospital should plan to make more F-18 the next morning, as the amount remaining at midnight is very small.

The half-life of F-18 is 1.8 hours, so after 1.8 hours, half of the original amount of F-18 will remain. After 3.6 hours, a quarter of the original amount will remain, and so on.

At 3:00 PM (9 hours after the F-18 was made), the hospital will have

= 1/2^(9/1.8)

= 1/2^5

= 1/32

= approximately 0.03125 milligrams of F-18 remaining.

At midnight (18 hours after the F-18 was made), the hospital will have

= 1/2^(18/1.8)

= 1/2^10

= 1/1024

= approximately 0.0009765625 milligrams of F-18 remaining.

While using cyclotron, based on these calculations, it seems that the hospital should plan to make more F-18 the next morning, as the amount remaining at midnight is very small.

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