50 POINTS! A Dancer leaps across the stage in a beautiful grand jete. The ballerina leaps at an angle of 25° and is able to jump a horizontal distance of 1.5m. What is her initial x and initial y velocity? (hint: find Vi first, then Vxi and Vyi)

Given that,

mass of block A = 14kg

mass of block B = 12kg

angle alpha equals = 19°

Tension in wire connecting weight of object A and B is due to weight of block B

             = mgsin19

due to slope we will take horizontal components of weight, mg

             = 12(9.81)sin(19)

             = 38.3

[tex]ke = \frac{1}{2} \times mv {}^{2} [/tex]

kinetic energy : ke

m : mass ( 25kg )

v : velocity ( 10 m/s )

[tex] \frac{1}{2} \times 25 \times {10}^{2} [/tex]

= 1250 (J )

My answer is 1250J. By doing 1/2 × 25 × 10²

Induction coil

hope this helps :)

Answer:

Unbalanced, 5N to the right.

Explanation:

Answer:

1 average 2 subtract.

Explanation:

a). add

b). subtract.

Answer:

160 mN

Explanation:

The force exerted on the wire is given by

[tex]F=BIL sin \theta[/tex]

where

B is the magnetic field strength

I is the current in the wire

L is the length of the piece of wire

[tex]\theta[/tex] is the angle between the direction of the field and the wire

In this problem:

B = 0.97 T

I = 4.7 A

L = 3.5 cm = 0.035 m

[tex]\theta=90^{\circ}[/tex]

Therefore, the force exerted on the wire is

[tex]F=(0.97 T)(4.7 A)(0.035 m)(sin 90^{\circ})=0.160 N=160 mN[/tex]

The product of (wavelength) x (frequency) is always the same number ... the wave's speed.  

So if the wavelength is somehow reduced to  1/4  its original length, the frequency is immediately multiplied by 4 .  That's the only way their product can remain the same.

The frequency increases by a factor of four when the wavelength is lowered by a factor of four.

Frequency is defined as the number of repetitions of a wave occurring waves in 1 second.

Frequency is given by the formula as,

[tex]\rm v = \lambda \times f[/tex]

If a wave travels at a constant speed the e frequency is inversely proportional to the wavelength.

if the wavelength is reduced by a factor of 4 then the frequency increases by a factor of 4.

Hence, the frequency increases by a factor of 4.

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Final answer:

At a constant voltage, current and resistance are inversely related as per Ohm's Law, with current decreasing as resistance increases, and vice versa.

Explanation:

When the voltage in a circuit is held constant, the current flowing through the circuit is inversely proportional to the resistance. This relationship is encapsulated by Ohm's Law, which states that the current (I) is equal to the voltage (V) divided by the resistance (R), mathematically represented as [tex]I = \frac{V}{R}[/tex].

As such, if the resistance in the circuit increases while the voltage remains unchanged, the current will decrease. Conversely, if the resistance decreases, the current will increase.

The resistance is influenced by factors such as the material of the conductor and its temperature. At a constant temperature, the resistance remains steady regardless of the changes in voltage or current.

Therefore, when considering Ohm's Law in a practical scenario, such as household electrical circuits, resistance plays a critical role in determining the current that flows through an appliance.

Answer:

The last part on the right side of the diagram

Explanation:

Im on plato and just got it right :)

The last part on the right end of the given wave has the highest frequency.

The frequency can be defined as the number of oscillations of a wave in 1 second. The wavelength can be described as the distance between the two crests or troughs on a wave that is separated by a distance.

For periodic waves, media in which the wave speed is independent of frequency, therefore the frequency has an inverse relationship to the wavelength.

[tex]{\displaystyle f={\frac {v}{\lambda }}[/tex]

In electromagnetic waves in vacuum, then v = c, where c is the speed of light:

[tex]{\displaystyle f={\frac {c}{\lambda }}[/tex]

When monochromatic waves propagate from one medium to another, their frequency will remain the same.

Frequency can be defined as the number of occurrences of a repeating event per unit of time. Frequency can be measured in hertz (Hz) which is generally equal to one event per second.

Therefore, the part at the very right of the wave has the highest frequency.

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Since you didn't add any answer choices I will explain the frequency of a wave the best I can.

The frequency of a wave is the distance between one crest and another. Frequency can affect the energy of a wave. If the crests in a wave are close together, than the frequency of said wave is high as well as the energy. If they are far apart, than the frequency will be low and the energy will also be low.

Hope this helped.

Wave frequency is the number of waves that pass a fixed point in a given amount of time.

The number of vibrations counted per second is called frequency. A wave is a group of vibrations that are referred to as energy. The bottom node is known as the crest, and the top node is known as the trough.

The frequency of an alternating current is the number of full cycles per second. The hertz, also known as Hz, is the accepted unit of frequency. The frequency of a current is 1 Hz if one cycle is completed per second; 60 cycles per second equals 60 Hz.

A often utilized factor in relation to the wave is frequency. Let's say we need to determine the wave's frequency and the wave moves at a certain pace. The wavelength and velocity of the light wave are also used to calculate the number of cycles the wave has completed in one second. The frequency term is frequently taken into account in relation to the sound wave.

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True because the picture below proves this....

* from which red color is least deviated and violet most.

* Hopefully this helps:) Mark me the brainliest:) !!

∞ 234483279c20∞

Yes, the statement is true. When white light passes through a prism, red light is the least deviated because it has the longest wavelength among the visible light spectrum. This dispersion phenomena breaks white light into its constituent colors.

The statement 'When white light passes through a prism, red light is least changed in direction' is True. This is because when white light, which is made up of different colors or wavelengths, is refracted through a prism, it experiences dispersion. As a result, different wavelengths of light are bent by different amounts. This phenomenon occurs because different frequencies of light have different refractive indices for a given material. Therefore, each color follows a slightly different path through the prism. Red light has the longest wavelength among the visible light spectrum and is refracted or bent the least compared to other colors such as violet, which has the shortest wavelength and is refracted the most. This explains why when we observe the dispersion of white light through a prism, such as in Newton's rainbow experiment, we see red light emerge at the least deviated angle, and violet light at the most deviated angle.

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= 4 feet

The height of the wave is defined as the elevation of the crest minus the elevation of the trough. or

The wave height is defined as the twice of the amplitude

It is given that the amplitude of the wave is 4 feet. The height of the wave is given as;

H = 2a

Where a is the amplitude of the wave.

Therefore, H = 4 feet.

Answer:

One battery, two resistors, two switches, three light bulbs

Explanation:

Each component is indicated with the following symbols:

- Battery: it is the one on the right, consisting of two longer lines and two shorter lines. It is the device that provides the electromotive force to the circuit

- Resistors: they are the devices on the bottom line, consisting of zig-zag lines. Resistors are pieces of circuit that resist to the flow of current in the circuit.

- Switches: they are labelled with a line with two dots at both ends. They can be opened/closed in order to stop/allow the flow of current in the circuit.

- Light bulbs: they are labelled with a circle filled with a X.

Answer:

A B D E

Explanation:

Bc I did the test

Answer:

The gravitational attraction of the Sun is what holds the planets in their elliptical orbits. So to explain this the mass effects the motion of the planets because the strength of gravitational force depends of the mass.

Explanation:

The mass of a planet affects the motion of the planet around the sun because mass is directly proportional to the gravitational force.

The force of attraction felt by a person at the center of a planet or Earth is called as the gravity.

Force of gravity between Sun and planet while moving in orbit is given by

F = GMm/R²

where M is the mass of Sun, m is the mass of any planet, G = gravitational constant = 6.67 x 10⁻¹¹ N.m²/kg² and R is the distance between two masses.

The weight of a person or object is determined by gravity. The gravitational attraction of the Sun holds the planets to move in their elliptical orbits.

Thus, the mass effects the motion of the planets because the strength of gravitational force depends of the mass of planet

Learn more about gravity.

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A. Gamma waves have the highest

Gamma Waves have the highest energy in the given list, followed by X-rays, Ultraviolet, Visible Light, Infrared, Microwaves, and then Radio Waves. Their energy is high enough to damage biological cells

In the electromagnetic spectrum, the energy of a wave is inversely proportional to its wavelength. The shorter the wavelength, the higher the energy they have. In this list, Gamma Waves have the shortest wavelength and therefore the highest energy.

Following Gamma Waves, are X-rays, Ultraviolet, Visible Light, Infrared, Microwaves, and then Radio Waves in terms of energy. Among these options, Gamma Waves definitely have the highest energy. The energy of Gamma Waves can be so high that they can cause damage to biological cells and are thus used in cancer therapy to destroy tumors.

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Final answer:

Reflection can be seen when light bounces off a body of water, when it reflects from a mirror, or even off rough surfaces like sidewalks, where the light is scattered rather than forming a clear image.

Explanation:

An example of reflection can be observed when looking at the surface of a body of water. From above, the water reflects light back into the air, providing us with the visible image of our surroundings. A familiar everyday experience is observing light reflection from a mirror, where light rays hit the mirror and bounce off at the same angle, forming a clear image. Surfaces like sidewalks also demonstrate reflection; the rough texture scatters the light in various directions, which is why we do not see a distinct image of the sun, but we still perceive the concrete due to reflected light.

Answer: b. mirages

Explanation:

A mirage is an optical illusion that occurs naturally due to refraction in the atmosphere. This phenomenon occurs especially in environments where the air exhibits large variations in its temperature, causing each of the layers with different temperatures to have a different index of refraction and therefore, the light rays will be diverted to the colder side.

Then, when this happens, displaced images of distant objects, or in the sky, are produced. In fact, sometimes it seems that distant objects are reflected on a liquid surface that is not real.

Question ~ What's the difference between the American and National Baseball Leagues?

Answer ~ Major League Baseball is divided into two leagues with long and storied histories. See more sports pictures

Most people know that Major League Baseball is divided into two separate leagues: 1The American League and the National League. The National League, formed in 1876, is the older of the two leagues that make up the professional Major League Baseball organization in the United States and Canada. The main difference in the two is that the American League uses the designated hitter rule to replace pitchers during at-bats, and the National League does not.

Alexander Cartwright, an architect and sportsman in New York City, is widely recognized as the father of modern organized baseball. He was instrumental in founding the first organization devoted to playing baseball, the Knickerbocker Base Ball Club, in 1845. He wrote 20 rules about the field layout and how the game was played. The most important one was that players had to be tagged or forced out rather than having the ball thrown at them [source: Dickey]. Of course, the rules were modified as the game evolved, but Cartwright gave us the essence of baseball.

Sorry if it's a bit too long and the word with the D isn't supposed to be a bad word in there sorry about that xD This took me a while. (It's not the Bad word with a D btw ;-; just don't mind that.) I'll put the part you need in bold so you know where they are. I don't know the others like the other 2 differences. But I tried my best. I hope this helps my hands really hurt from typing ;-;

Three differences between the American League and National League in Baseball include the use of the DH rule by the AL but not traditionally by the NL, the former impact of the All-Star Game on World Series home-field advantage, and the integration of Interleague play.

The American League (AL) and the National League (NL) are the two leagues that make up Major League Baseball (MLB). Historically, there have been several differences between them. Here are three distinct differences:

These differences contribute to unique strategies and fan experiences within each league.

Answer: the answer is B.

Explanation:

Answer:

Option B)

Explanation:

As we know that Earth's magnetic poles are inclined at some angle with the rotational axis of the Earth.

So here the magnetic poles must be inclined at some angle with the rotational axis of Earth

Now we know that magnetic field of earth originates from the south pole of earth and terminate near the north pole of earth

So magnetic poles of earth are opposite to the geographic pole of earth

So magnetic field will originate near the south pole and go near the north pole of earth

so here correct answer must be Option B)

Answer:

It might be the sum is the same

Explanation:

Correct me if i am wrong but there is no friction so that means there would not be anything slowing down the ball, therefore the ball wouldn't change or the energy wouldn't change because the ball would never stop.

The sum of the ball’s kinetic energy and potential energy remains the same as the ball rolls from point A to point E ( if there’s no friction between the ball and the ground).

Answer: Option C

Explanation:

Based on the law of mechanical energy's conservation, the sum of both kinetic and potential energies i.e. the total amount of mechanical energy remain conserved even in the absence of dissipative forces (friction or air resistance) in a bound system.

                    E = Kinetic + Potential

The kinetic energy is high when ball goes downward but potential energy decreases and reverse happens when ball goes up. But in these case, the sum energy would be constant one.

Answer:

2 m/s

Explanation:

The impulse exerted by the obstacle on the block is equal to the change in momentum of the block:

[tex]I=\Delta p = -6 Ns[/tex]

where we put a negative sign because the direction of the impulse is south, which is opposite to the initial direction of travelling of the block (north).

The change in momentum is also equal to

[tex]\Delta p = m (v-u)[/tex]

where

m = 3 kg is the mass of the block

v is the final velocity

u = +4 m/s is the initial velocity

Solving the equation for v, we find the final velocity of the block:

[tex]v=u+\frac{\Delta p}{m}=+4 m/s+\frac{-6 Ns}{3 kg}=+2 m/s[/tex]

and the positive sign means the direction is still north.

I just had this question on my test, the answer is C.

Answer:

The new force will decrease to one sixth the original value.

Explanation:

It is given that,

One charge is decreased to one-third of its original value, and a second charge is decreased to one-half of its original value.

Let, [tex]q'_1=\dfrac{1}{3}q_1[/tex] q₁ is the charge 1

[tex]q'_2=\dfrac{1}{2}q_2[/tex] q₂ is the charge 2

Initially, the electrical force between the charges is given by :

[tex]F=k\dfrac{q_1q_2}{r^2}[/tex]...........(1)

Let F' is the new force i.e.

[tex]F'=k\dfrac{q'_1q'_2}{r^2}[/tex]

So,

[tex]F'=k\dfrac{\dfrac{1}{3}q_1\times \dfrac{1}{2}q_2}{r^2}[/tex]

[tex]F'=\dfrac{1}{6}k\dfrac{q_1q_2}{r^2}[/tex]

[tex]F'=\dfrac{1}{6}F[/tex]  (from equation 1)

Hence, the new force will decrease to one sixth the original value.

A. Are created by vibrations

A common characteristic of sound waves is that they are created by vibrations. Sound is produced when an object or medium vibrates, causing molecules or particles in the surrounding medium to also vibrate. The correct option is option (A).

A common characteristic of sound waves is that they are created by vibrations. These vibrations are transmitted as mechanical waves through the medium, resulting in the propagation of sound.

Sound waves travel in a variety of directions depending on the source and surrounding conditions, so option (B) is not accurate in general.

Option (C) is incorrect because sound waves require a medium to propagate and cannot travel through empty space, such as a vacuum.

Option (D) is also incorrect because the speed of sound is much slower than the speed of light.

A common characteristic of sound waves is that they are created by vibrations. The correct option is option (A).

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The answer is A. Solids have both definite shape and denfinite volume.

The correct statement that describes the properties of solids is A. Solids have both a fixed shape and a fixed volume, resulting from the particles being in fixed positions and bound by strong intermolecular forces.

Among the statements given, the one that best describes the properties of solids is: A. Solids have both definite shape and definite volume. In the solid state, the particles that make up the material are in fixed positions relative to each other because the thermal energy is not sufficient to overcome the strong intermolecular forces that bind them. This result is that solids have a rigid and definite shape, and they also have a definite volume, which means they do not change volume or shape unless a force is applied that alters their structure.

Liquids, on the other hand, have a definite volume but no definite shape, assuming the shape of their containers. Gases fill their containers completely, expanding to fill the volume available and thus having neither a definite volume nor a definite shape.

A battery operated lamp because battery's don't use your own electricity. They come with electricity already.

a battery operated lamp

92 percent because you multiply it by 2

I'm pretty sure that would be a A.

The change in the kinetic energy of the object as the speed changes is proportional to the square of the factor by which the speed changes. For example if the speed of the object becomes double, its kinetic energy changes to four times the initial kinetic energy.

  = 64 N/m

According to Hooke's Law for a helical spring or an elastic material, extensional force is directly proportional to the distance the material has extended.

F = ke; where F is the extension force, k is the spring constant, and e is the distance extended.

Thus;

k = F/e

  = 44N/0.69 m

  = 63.768 N/m

  = 64 N/m

Answer:

work being done on an object.

Answer. A. A man pushes a couch across the room

diagram identifies an axle:

Answer: B. Z

simple machine described as a shaft at the center of a wheel:

Answer: D. Wheel and axle

Type of lever:

A. a catapult

Answer:

work being done on an object.

Answer. A. A man pushes a couch across the room

diagram identifies an axle:

Answer: B. Z

simple machine described as a shaft at the center of a wheel:

Answer: D. Wheel and axle

Type of lever:

A. a catapult

Explanation:

Refer to the diagram attached (created with GeoGebra). Consider the 5 N force in two directions: parallel to the 8 N force and normal to the 8 N force.

The sum of forces on each direction will be the resultant force on that direction:

Apply the Pythagorean Theorem to find the magnitude of the resultant force.

[tex]\displaystyle \Sigma F = \sqrt{{(8 + \dfrac{5\sqrt{2}}{2})}^2 + {(\dfrac{5\sqrt{2}}{2})}^2} = 12.1\;\text{N}[/tex] (3 sig. fig.).

The size of the angle between the resultant force and the 8 N force can be found from the tangent value of the angle. Tangent of the angle:

[tex]\displaystyle \dfrac{\Sigma F_\text{Normal}}{\Sigma F_\text{Parallel}} = \dfrac{8 + \dfrac{5\sqrt{2}}{2}}{\dfrac{5\sqrt{2}}{2}} \approx 0.306491[/tex].

Find the size of the angle using inverse tangent:

[tex]\displaystyle \arctan{ \dfrac{\Sigma F_\text{Normal}}{\Sigma F_\text{Parallel}}} = \arctan{0.306491} = 17.0\textdegree[/tex].

In other words, the resultant force is 17.0° relative to the 8 N force.