This model shows a ball being shot from the cannon. Which of these statements accurately describes the energy of the cannonball? Select ALL that apply. A) The kinetic energy is lowest at point E. B) The potential energy is lowest at point E. C) The kinetic energy is greatest at point C. D) The potential energy is greatest at point C. E) The ball changes from kinetic to potential energy at point A.

Answer:

Mercury's natural state is where the atoms are close to each other but are still free to pass by each other. In which state(s) could mercury naturally exist?

Liquid is the answer

Explanation:

Option C is the best choice since the ball will travel at the same speed just at bottom of the hill because the hill height is the same for both balls.

work results in KE modification.

Change in \(KE_mgh = 1/2 mv2\)  equals gravitational work.

A ball's velocity needs to be utilized to generate energy potential as it is tossed into the air. The pitcher's potential power increases, while its speed decreases. An object obtains energy whenever a power is given to it and results in movement in the direction of the force. the measurement of how efficiently a machine uses energy to carry out tasks. Often, a vehicle's effectiveness is stated as a percentage.

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                            "Complete question"

Ball #1 is rolled down the steeper side of a hill while ball #2 rolls down the opposite side which is less steep. Both balls roll out onto a flat surface at the same level. Assuming there is no friction, how do the speeds of the balls compare when they reach the flat surface?

a. Ball #1 has the greater speed.

b. Ball #2 has the greater speed.

c. The speed will be the same for both balls.

d. Not enough information is given.

The exterior or housing, the audio reception and speaker system, the picture tube, and a complicated mass of electronics including cable.

Antennae input and output devices, a built-in antenna in most sets, a remote control receiver, and computer chips, make up the four main sets of parts that make up a television.

Typically, in addition to coaxial cable, HDMI, and other audio-video connectors, smart TVs also enable Ethernet, WiFi, USB, Bluetooth, and flash memory cards from digital cameras.

Therefore, the TV consists of exterior, audio reception, speaker system, and picture tube.

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Answer:

f= 6.59x10^14

Explanation:

please see attached and don't forget to rate if it helps

Blue light has a wavelength of 455 nanometers, then its frequency would be 6.5934 ×10¹⁴ Hertz.

It can be understood in terms of the distance between any two similar successive points across any wave for example wavelength can be calculated by measuring the distance between any two successive crests.

The wavelength is inversely proportional to the frequency of the wave as from the following relation.

C = νλ

where c is the speed of the light having a value of 3 ×10⁸ meters/second.

As given in the problem if Blue light has a wavelength of 455 nanometers, then we have to find out its wavelength,

speed of light = wavelength ×frquency

3 ×10⁸ meters/second  = 455 ×10⁻⁹ ×frquency

frequency  = 3 ×10⁸/455 ×10⁻⁹

                  =6.5934 ×10¹⁴

Thus, the frequency of the wave would be 6.5934 ×10¹⁴ Hertz.

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The keys were thrown upward with an initial velocity of 16.0 m/s.

The equation for vertical position is given by:

                                        y = v0t + (1/2)at^2

where,

v0 is the initial velocity,

t is the time elapsed, and

a is acceleration due to gravity (assumed to be -9.8 m/s^2).

Rearranging the equation for t and substituting the known values, we get:

t = √(2(y - v0t)/a) = √(2(4.15 - 0)/(-9.8)) = 1.70 s

Now that we have the time, we can solve for the initial velocity:

v0 = (y - (1/2)at^2)/t = (4.15 - (1/2)(-9.8)(1.70)^2)/1.70 = 16.0 m/s.

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The ski will travel a distance of (2μL/3) + (2/3)h along the level at the foot of the incline.

Assuming that the ski starts from rest at the top of the incline and slides down the incline without any loss of energy due to friction or air resistance, the potential energy of the ski at the top of the incline is converted entirely into kinetic energy as it slides down the incline. When the ski reaches the bottom of the incline, all of the kinetic energy is transferred into potential energy and frictional work done by the coefficient of friction, bringing the ski to a stop.

Let's denote the height of the incline by h, the length of the incline by L, and the coefficient of friction between the ski and the snow by μ.

The potential energy of the ski at the top of the incline is given by:

PE = mgh

where m is the mass of the ski and g is the acceleration due to gravity. At the bottom of the incline, the potential energy is zero, and the kinetic energy of the ski is given by:

KE = (1/2)m\(v^2\)

where v is the speed of the ski at the bottom of the incline.

Since there is no net work done on the ski by external forces, the total energy of the ski is conserved, i.e.,

PE(top of incline) = KE(bottom of incline) + Work(friction)

mgh = (1/2)m\(v^2\) + μmgd

where d is the distance traveled by the ski along the level at the foot of the incline. Since the ski starts from rest at the top of the incline, we can also use the equation:

\(v^2\) = 2gh

To eliminate v from the above equation, giving:

d = (2μL/3) + (2/3)h

Therefore, the ski will travel a distance of (2μL/3) + (2/3)h along the level at the foot of the incline.

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Answer:

I don't know I'm sorry I will tell you another answer asks me

Answer:

55 degrees

Explanation:

A ray of light strikes a plane mirror at an angle of incidence. The angle between the incident ray and the reflected ray is 70°. The correct option is A.

The law states that angle of incidence of the incident ray is equal to the angle of reflection through a plane surface.

Here, angle of incidence of light on a plane mirror is 35°, then the angle of reflection will also be 35°.

i = r = 35°

Then the angle between the incident ray and the reflected ray will be

i +r = 35 + 35 =70°

Thus, the correct option is A.

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Answer:

9.0 m/s/s

Explanation:

Given the following data;

Initial velocity = 10 m/s

Final velocity = 55 m/s

Time = 5 seconds

To find the average acceleration;

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}\)

Substituting into the equation;

\(a = \frac{55 - 10}{5}\)

\(a = \frac{45}{5}\)

Acceleration, a = 9.0 m/s²

Therefore, the average acceleration of the motorcycle is 9 meters per seconds square because it's experiencing a uniform velocity or motion.

Answer:

this is actually

Explanation:

6 points

Answer:

helppppp

Explanation:

Answer:

A. 28 m/s

B. 5.72 s

Explanation:

The following data were obtained from the question:

Maximum height (h) = 40 m

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

A. Determination of the initial velocity.

Maximum height (h) = 40 m

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

Velocity at maximum height (v) = 0 m/s

Initial velocity (u) =.?

v² = u² – 2gh (Ball is going against gravity)

0² = u² – (2 × 9.8 × 40)

0 = u² – 784

Collect like terms

0 + 784 = u²

784 = u²

Take the square root of both side

u = √784

u = 28 m/s

Thus, the ball was kicked with a velocity of 28 m/s

B. Determination of the time of flight.

We'll begin by calculating the time taken to reach the maximum height. This can be obtained as follow:

Velocity at maximum height (v) = 0 m/s

Initial velocity (u) = 28 m/s

Time taken to reach the maximum height (t) =?

v = u – gt (Ball is going against gravity)

0 = 28 – 9.8t

Rearrange

0 + 9.8t = 28

9.8t = 28

Divide both side by 9.8

t = 28/9.8

t = 2.86 s

Finally, we shall determine the the time of flight as follow:

Time taken to reach the maximum height (t) = 2.86 s

Time of flight (T) =?

T = 2t

T = 2 × 2.86

T = 5.72 s

Therefore, the time of flight for the ball is 5.72 s

Answer:

Observation is essential in science. Scientists use observation to collect and record data, which enables them to construct and then test hypotheses and theories. Scientists observe in many ways – with their own senses or with tools such as microscopes, scanners or transmitters to extend their vision or hearing. These tools allow for more precise and accurate observations. Scientists also use equipment to measure things like radiation or pH – phenomena not directly observable.

Explanation:

Answer:

In free fall, mass is not relevant and there's no air resistance, so the acceleration the object is experimenting will be equal to the gravity exerted. If the object is falling on our planet, the value of gravity is approximately 9.81ms2 .

Answer:

The impulse of the collision in system A is twice the impulse of the collision in system B. (Last choice)

Explanation:

I just took the quick check and got it wrong for putting what the other person put, which I should've gone with my first choice. The answer above is correct. I really hope this helps!

The correct statement about systems A and B is ; ( D ) The impulse of the collision in system A is twice the impulse of the collision in system B

Momentum is a product of the mass and velocity of particles in motion while impulse is the rate of change of the momentum of particles/objects when a force acts on the object.

The momentum of a particle is proportional to its impulse therefore as momentum in system A changes at twice the rate of change of the momentum in system B the impulse of the collision in system A is also twice the impulse of the collision in system B

Hence we can conclude that The correct statement about systems A and B is The impulse of the collision in system A is twice the impulse of the collision in system B

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Tocalculate the wavelength of electromagnetic radiation needed to remove an electron from the valance shell of an atom of the element can be calculated using the equation: E = hc/λ

Where E is the energy required to remove the electron from the valence shellh is Planck's constanctc is the speed of lightλ is the wavelength of the electromagnetic radiation usedThe energy required to remove an electron from the valence shell of an atom is known as ionization energy.

Once you know the ionization energy of the element, you can use the above equation to calculate the wavelength of electromagnetic radiation needed to remove an electron from the valence shell of the atom of the element. The wavelength calculated will be the minimum wavelength required to remove the electron from the valence shell of the atom. So therefore the wavelength of electromagnetic radiation needed to remove an electron from the valance shell of an atom of an element can be calculated using the equation: E = hc/λ.

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Answer

Calculate the amount of heat needed to melt 2.00 kg of iron at its melting point (1809 K), given that: ?Hfus = 13.80

The activation energy of a certain reaction is used to find the temperature at which the reaction would go twice as fast.  while the Arrhenius equation can be used to find the rate constant at a different temperature for the same reaction.

We can use the Arrhenius equation, which relates the rate constant of a reaction to the activation energy and temperature. We know the rate constant at 20C and the activation energy, so we can set up the equation as follows:

k2 = 2k1
ln(k2/k1) = Ea/R * (1/T1 - 1/T2)
T2 = Ea/R * (1/T1 - ln(k2/k1)/Ea)

Plugging in the given values, we get:

T2 = 47.1 kJ/mol / (8.314 J/mol*K) * (1/293 K - ln(2)/(47.1 kJ/mol))
T2 ≈ 358 K or 85 C

For the second part of your question, we can use the same equation to find the rate constant at 140 C:

ln(k2/k1) = Ea/R * (1/T1 - 1/T2)
k2 = k1 * e^(Ea/R * (1/T1 - 1/T2))

Plugging in the given values, we get:

k2 = 0.0170 s^-1 * e^(47.1 kJ/mol / (8.314 J/mol*K) * (1/293 K - 1/413 K))
k2 ≈ 1.81 s^-1.

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Answer: A method of classifying stars by their temperatures and compositions.

Explanation:

The Morgan-Keenan Spectral Classification system is a method of classifying stars by their temperatures and compositions.

The primary factor used to categories stars is their temperature.

The Morgan-Keenan luminosity class (MK or MKK) was developed as a result of the Harvard spectral classification classification scheme does not completely describe the star as it cannot distinguish between stars with the same temperature but different luminosities.

Since then, class I stars have been separated into Ia-O, Ia, and Ib, and classes VI (sub-dwarf), and D (white dwarf) have been added, replacing the original roman numerals between I (supergiant star) and V (main sequence).

The original Harvard classification of the star is supplemented by the MK luminosity class in order to fully define it. For instance, the entire classification of the Sun, which is a main sequence G2 star, is G2V.

The MK luminosity class is added to the Harvard classification of the star in order to fully define it.

A method of classifying stars by their temperatures and compositions is applied in Morgan-Keenan Spectral Classification system.

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The tangential velocity of the car's tire is the product of the angular velocity and radius of the car's tire which is 11(r) m/s.

The angular velocity of the tire is the rate of change of angular displacement of the tire with time.

The magnitude of the angular velocity of the tire is calculated as follows;

ω = 2πN

where;

ω = 2π x (5.25 / 3)

ω =  11 rad/s

The tangential velocity of the car's tire is the product of the angular velocity and radius of the car's tire.

The magnitude of the tangential velocity is caculated as follows;

v = ωr

where;

v = 11r m/s

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Answer:

D. 256 m/s

Explanation:

\(f\) = Frequency of the wave = \(16\ \text{Hz}\)

\(\lambda\) = Wavelength = \(16\ \text{m}\)

Speed of a wave is given by

\(v=f\lambda\)

\(\Rightarrow v=16\times 16\)

\(\Rightarrow v=256\ \text{m/s}\)

The speed of the wave as it passes through the cloud of nitrous oxide is \(256\ \text{m/s}\).

Answer:

D. 256 m/s​

Explanation:

d. d as in dog

Answer:

3.0 W

I actually had this question before BUT I have no clue how to explain it. I haven't done this in so long. I apologize but that is the correct answer.

Answer:3.0 W

Explanation:

P=VI

P= (6.0 V) (5.0 A)

P= 3.0 W

Answer:

Newtons third law explains ...........

Explanation:

Newton's third law explains why her elbow hurts because Newton's law says that " for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. ", and her elbow's force while moving was equally matched by the table so if her elbow released 30N as her force then the table also released 30 N.

According to Newton's third law, when Lean bumps her elbow on the table it exerts a force on the table, and in reaction, the table exerts an equal magnitude of the force on her elbow and her elbow will hurt.

According to Newton's 3rd law of motion, if an object exerts a force on another, then it also experiences a force, and such forces are called action and reaction pairs.

When the first object exerts a force on the 2nd object, the first object will also experience a force equal in magnitude but in the opposite direction of the applied force.

For example, when a person is swimming, he pushes the pool water backward direction. In return, the water pushes him in a forward direction, which makes him proceed.

Therefore, when Lean bumps her elbow on the table, the table exerts an equal force on her elbow therefore, her elbow hurts.

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Answer:

According to Japanese legend, Himiko was the daughter of the emperor Suinin (fl. 1st century bc–1st century ad), who gave her custody of the sacred mirror, symbol of the sun goddess. In 5 bc she supposedly enshrined the mirror at Ise, a city of present Mie Prefecture.

The speed of the car is 28.0 m/s

Given,

mass of car(m) = 600 kg

radius of circular track (r) = 100 m

Time (t) = 36 seconds

\(speed=\frac{distance}{time} \\\\=\frac{2*pi*r}{t} \\\\=\frac{2*3.14*160}{36}\\\\28.0 m/s\)

Therefore, the speed of the car is 28.0 m/s

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