What is the momentum of a 15 kg tire rolling down a hill at 3 m/s?

5 kg • m/s
18 kg • m/s
45 kg • m/s
60 kg • m/s

Answer: 98cm

Explanation:

Dimension of rectangle = 30cm by 25cm

Length(l) = 30cm

Width(w) = 25cm

Perimeter of a rectangle = 2(l + w)

Quadrant of circle cut away of each side of the rectangle :

Radius = 7 cm =

That is, the dimension of the triangle reduces by 2 * 7 = 14cm

New length = 30 - 14 = 16cm

New width = 25 - 14 = 11cm

The four corners =( 4 × 2πr ) / 4

2πr = 2 × 22/7 × 7 = 44cm

Perimeter = 2(16cm + 11cm)

= 2(27cm)

Perimeter = 54cm + 44 = 98cm

The amplitude of damped oscillatory motion is exponential.

Because we already know that this function is exponential, that sort of function that describes the amplitude of damped oscillatory motion is exponential.

\(y = Ae^{\dfrac{-b}{2m}}\times cos(\omega t)\)

The maximum displacement or distance a point on a vibrating body or wave can move in relation to its equilibrium location is referred to as the amplitude in physics. It is equivalent to the half-length of the vibration path. The bob swings halfway across the pendulum's amplitude when it shifts from one side to the other. Waves are produced by vibrating sources, and the amplitude of the waves is inversely proportional to the amplitude of the source.

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1. The x component of the force is 4.4 N

2. The y component of the force is 3.5 N

The following data were obtained from the question:

1. How to determine the x component

x component = FCosθ

x component = 5.6 × Cos 39

x component = 4.4 N

2. How to determine the y component

y component = FSineθ

y component = 5.6 × Sine 39

y component = 3.5 N

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Answer:

Answer: Elementary Entities are any of several entities, such as electrons, neutrons, or protons, that are less complex than atoms and are regarded as the constituents of all matter.

The wolf's kinetic energy is 2,500 joules, calculated using the formula KE = 0.5 × mass × velocity².

The kinetic energy of an object is the energy it possesses due to its motion.

It can be calculated using the formula KE = 0.5 × mass × velocity², where KE represents kinetic energy, mass is the object's mass in kilograms, and velocity is its speed in meters per second.

In this case, the mass of the wolf is 50 kg, and its velocity is 10 m/s.

Plugging these values into the formula, we get KE = 0.5 × 50 × (10)², which simplifies to KE = 0.5 × 50 × 100.

Therefore, the wolf's kinetic energy is 2,500 joules.

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Yes it will affect the number of magnetic field lines travelling through the coil changes when the magnet is moved inside a coil of wire.

How is the first law of Faraday formulated?

The first and second laws of electrolysis by Faraday, which are as follows, govern the electrolysis process: The charge (mQ m Q) has a direct relationship with the mass of material liberated (or deposited).

According to Faraday, the variation in the number of field lines traversing the wire coil is what creates the induced electromagnetic field (EMF) in the loop. The rate of change in the number of magnetic field lines that pass through the loop, in particular, is what determines the induced emf. The term "magnetic flux" is similar to the term "electric flux," and it refers to the number of field lines that are passing through a surface.

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Answer:

Thats for your life, not ours.

Explanation:

Answer:

6 minutes per mile

Given:

The specific heat of the material is c Cal/(gram°C)

The mass of the material, m=5 g

The initial temperature of the material, T₁=10 °C

The final temperature of the material, T₂=37 °C

To find:

The expression for the amount of heat added to the material.

Explanation:

The specific heat of a material is the heat required to raise the temperature of the unit mass of the material by one degree celcius.

From the equation of specific heat, the amount of the heat added to a material is given by,

On substituting the known values,

Final answer:

Thus the correct answer is option A.

Answer:

So, insulation essentially works by creating a sort of barrier between the hot and the cold object. This barrier helps to reduce heat transfer by either reflecting the thermal radiation or by decreasing thermal conduction and convection from one object to the other.

Answer:

So, insulation essentially works by creating a sort of barrier between the hot and the cold object. This barrier helps to reduce heat transfer by either reflecting the thermal radiation or by decreasing thermal conduction and convection from one object to the other.

The magnitude of the magnetic force (Fad) can be expressed as: Fad = I2 * L * ((μ₀ * I1) / (2 * π * d)).

1. Calculate the magnetic field (B) created by wire AD at a distance d from it using the formula: B = (μ₀ * I1) / (2 * π * d).

2. Determine the length (L) of the wire perpendicular to the magnetic field, which would be the dimension of the loop parallel to wire AD.

3. Calculate the magnetic force (Fad) on the wire carrying current I2 using the formula: Fad = I2 * L * B.

the magnitude of the magnetic force (Fad) can be expressed as:  Fad = I2 * L * ((μ₀ * I1) / (2 * π * d)).

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The three types of wave motions are transverse waves, longitudinal waves and surface waves.

The type of wave in which the motion of particles in a medium is perpendicular to the wave's direction is known as a transverse wave. Example of it is ripples on the surface of water.

The type of wave in which the motion of particles in a medium is in the same direction as that of a wave is known as longitudinal wave. Example of it is an electromagnetic wave.

The type of wave that occurs along the boundary of any two media or substances is called a surface wave. Example of it is a seismic wave.

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The electric flux through the curved surface is given by Φ = EA, which is option (b).

The electric flux through a closed surface is defined as the total electric field passing through that surface. In this case, we have a curved surface with a constant electric field tangent to it.

The formula for electric flux is given by Φ = ∫E⋅dA, where Φ is the electric flux, E is the electric field, and dA is the differential area vector.

Since the electric field is tangent to the surface, we can write E⋅dA = E dA cosθ, where θ is the angle between the electric field and the differential area vector. Since the electric field and the differential area vector are parallel, θ = 0, and cosθ = 1. Thus, E⋅dA = EdA.

The integral then simplifies to Φ = E ∫dA = EA, where A is the total area of the curved surface.

Therefore, the electric flux through the curved surface is given by Φ = EA.

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Answer:

Physical

Explanation:

The physical properties of a substance change, but the identity of the substance doesn't change

Answer:

net force=applied force

Explanation:

...........................................

Answer:

C

Explanation:

Hypothesis is one of the science methods. Hypothesis is the same as guessing. It's a scientific method that precedes observations.

According to the question asking that Which of the following is a hypothesis ?

The correct option is C which is

If a squid is attacked by a predator, it will squirt ink

It is an hypothesis because there is no experimental evidence to back it up.

The absolute pressure of air in the closed water tank can be calculated by adding the gauge pressure to the atmospheric pressure.

In the given question, the gauge pressure is 4 psi and the atmospheric pressure is 14.7 psi.

Therefore, the absolute air pressure in the tank is:

Absolute air pressure = Gauge pressure + Atmospheric pressure

Absolute air pressure = 4 psi + 14.7 psi
Absolute air pressure = 18.7 psi

So, the absolute air pressure in the closed water tank is 18.7 psi.

It is important to remember that the absolute air pressure is the sum of the gauge pressure and the atmospheric pressure. The gauge pressure is the pressure measured by the Bourdon gauge, and the atmospheric pressure is the pressure of the air outside the tank.

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The magnitude of the magnification for converging lens is 3

Converging lens is convex lens whereas diverging lens is a concave lens.

Given:

distance of object from converging lens = 6.0 cm

focal length = 9.0 cm

To Find:

magnitude of the magnification

Solution: Magnification is the ability of a microscope to produce an image of an object at a scale larger (or even smaller) than its actual size.

Magnification (m) = h / h' Here, h is the height of the object and h' is the height of the object. Besides, it can also be related to the object distance and image distance. So, it can be written as: m = -v/u

Using the formula for magnitude of magnification

1/f = 1/d° + 1/di

M = - d1/d° = 3

Hence, magnitude of the magnification is 3

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Brenda needs to walk a distance of 0.3865 meters to reach the next loud spot.

Brenda is walking along a line parallel to the speakers, the sound waves from each speaker will reach her in phase and interfere constructively, producing a loud spot. The distance between consecutive loud spots is equal to half the wavelength, so we can calculate this distance using the wavelength of the sound wave:

Distance between loud spots = 0.5 × wavelength

For an A note with a wavelength of 0.773 m, the distance between consecutive loud spots is:

Distance between loud spots = 0.5 × 0.773 m = 0.3865 m

Since Brenda is 24.0 m away from the speakers and the speakers are 12.0 m apart, she is equidistant from the two speakers and will hear the sound at its maximum intensity.

Therefore, she is currently at a loud spot. To find the next loud spot, she needs to walk a distance equal to the distance between consecutive loud spots:

Distance between loud spots = 0.3865 m

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If the emergency air line breaks or gets pulled apart while driving, the loss of pressure will cause the emergency parking brakes to activate automatically.

This is a safety mechanism designed to bring the vehicle to a stop and prevent it from moving any further. The emergency brakes are spring-loaded, which means they engage automatically when air pressure is lost.

Once the brakes are engaged, the vehicle will not be able to move until the air line is fixed and pressure is restored.

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The applied force acting on the wagon is 3.04 N.

The direction of the applied force is east.

The net force acting on the wagon is Fa - Ff, which is equal to (2.4 kg)(1.2 m/s^2) + 1.22 N, or 3.04 N.

To determine the applied force, we need to use the equation for net force: ΣF = ma

where ΣF is the sum of all forces acting on the wagon, m is the mass of the wagon, and a is the acceleration of the wagon.

From the free-body diagram, we can see that the forces acting on the wagon are the applied force (Fa) in the direction of motion (east), and the frictional force (Ff) in the opposite direction (west):

So the net force equation becomes:

Fa - Ff = ma

Substituting the given values, we get:

Fa - 1.22 N = (2.4 kg)(1.2 m/s^2)

Simplifying and solving for Fa, we get:

Fa = (2.4 kg)(1.2 m/s^2) + 1.22 N

Fa = 3.04 N

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Here is the missing information.

An exhausted bicyclist pedal somewhat erraticaly when exercising on a static bicycle. The angular velocity of the wheels takes the equation ω(t)=at − bsin(ct) for t≥ 0, where t represents time (measured in seconds), a = 0.500 rad/s2 , b = 0.250 rad/s and c = 2.00 rad/s .

Answer:

0.793 rad

Explanation:

From the given question:

The angular velocity of the wheel is expressed by the equation:

\(\omega (t) =\dfrac{d\theta}{dt}\)

The angular velocity of the wheels takes the description of the equation ω(t)=at−bsin(ct)

SO;

\(\dfrac{d \theta}{dt} = at - b \ sin \ ct\)

dθ = at dt - (b sin ct) dt

Taking the integral of the above equation; we have:

\(\int \limits^{\theta}_{0} \ d \theta = \int \limits ^{t=2}_{0} at \ dt - (b \ sin \ ct) \dt\)

\([\theta] ^{\theta}_{0} = a \bigg [\dfrac{t^2}{2} \bigg]^2_0 - \bigg[ -\dfrac{b}{c} \ cos \ ct \bigg] ^2_0\)

where;

a = 0.500 rad/s2 ,

b = 0.250 rad/s and

c = 2.00 rad/s

\(\theta = (0.500 \ rad/s^2 ) \bigg [\dfrac{(2s)^2}{2} \bigg] - \bigg[ -\dfrac{0.250 \ rad/s}{2.00 \ rad/s} \ cos \ (2.00 \ rad/s )( 2.00 \ s) \bigg] - \bigg [ \dfrac{0.250 \ rad/s}{2.00 \ rad/s}\bigg ] cos 0^0\)

\(\mathbf{\theta = 0.793 \ rad}\)

Hence, the angular displacement after two seconds = 0.793 rad

The acceleration of a projectile is option d, -9.80m/s2 in the y axis. A projectile is any object that is thrown or launched into the air and is subject to gravity. As the projectile moves through the air, it experiences two main types of forces: gravity and air resistance.

The force of gravity acts in the downward direction, pulling the projectile towards the ground. The acceleration due to gravity is 9.80m/s2, but since the projectile is moving in a curved path, the acceleration vector points downward and is negative (-9.80m/s2) in the y-axis.
The acceleration in the x-axis is usually zero unless there are external forces acting on the projectile, such as wind or air resistance. In that case, the acceleration in the x-axis would depend on the direction and strength of those forces.
In summary, the acceleration of a projectile is primarily due to gravity, and the direction and magnitude of the acceleration vector depends on the direction and motion of the projectile. For a projectile moving in a vertical direction, the acceleration vector points downward and is -9.80m/s2 in the y-axis.

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23 km when x1+ x2 = 0.87/10. is the main answer.

The size of a vector in the x-direction is expressed by its x-component, also known as its horizontal component. The size of a vector in the y-direction is represented by its y-component, also known as its vertical component. A projectile's trajectory is determined by velocity in two dimensions. The projectile's x and y components each represent its horizontal and vertical motion, respectively. Meters are the units used to indicate both horizontal and vertical distances (m).

A+B=A= (x1+x 2) i+20 jx1+x2/20

=tan60 = 0.5/0.87.

A=x1 i+10 j.

B=x2 i+10 j.

A+ B = (.87/10) 2 + 20 /2

= 23 km when x1+ x2 = 0.87/10.

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Answer:

b) Quartz Clock

Explanation:

It's is a very type of clock which uses the vibration of quartz crystals to measure time accurately

Answer:

Because rice mill is more advanced than dhiki.

It is the developed form of the dhiki.

In order to find the magnitude of the electric field at the origin, you need to use the equation E = q/4πεr², where q is the charge, ε is the permittivity of space, and r is the distance from the origin.

To calculate the electric field, you must first determine the charge of the particle, then determine the distance to the origin, and finally, use the equation to calculate the magnitude of the electric field.

Once you have the magnitude of the electric field at the origin, you can then use it to explore the behavior of other electric fields in the area.

To calculate the magnitude, you must first determine the values of k, q, and r, then plug them into the equation and solve. The resulting answer will be the magnitude of the electric field at the origin.

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Cricket bat uses one common law of physics

When a ball hits the bat with some velocity ,the cricket bat should hit with some more velocity to get greater impact velocity to move the ball somewhere .

By studying the electromagnetic spectrum, the waves that have higher frequency/energy are

a) infrared waves > microwaves

b) ultraviolet rays > indigo light

c) red light > radio waves

d) yellow light > orange light

All types of light, even invisible to the human eye light, are described by the electromagnetic spectrum. In actuality, the majority of the light in the cosmos is hidden from human sight. The electromagnetic spectrum is much larger than the light we can see, which is made up of each hue in the rainbow. The parts of the electromagnetic spectrum are referred to as gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, microwaves, and radio waves, in that sequence from highest to lowest energy. The highest energy, shortest wavelengths, and highest frequency are found in gamma rays. Contrarily, radio waves are the forms of EM radiation with the lowest energy, longest wavelengths, and lowest frequencies.

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Answer:

(b) "Its length"

Explanation:

The pitch of a musical instrument primarily depends on its length. Option (b) "Its length" is the correct answer. Let me explain why.

Pitch is a perceptual quality of sound that refers to how high or low a sound is perceived to be. In the case of musical instruments, pitch is determined by the frequency of the sound waves produced.

When a musical instrument is played, it produces sound waves that travel through the air. The pitch of the sound is directly related to the frequency of these sound waves. Higher-frequency waves create higher-pitched sounds, while lower-frequency waves create lower-pitched sounds.

The length of a musical instrument plays a crucial role in determining its pitch. In instruments such as strings, wind instruments, and some percussion instruments, the length of the vibrating element or the resonating chamber directly affects the pitch.

Let's consider a few examples:

1. String Instruments: In instruments like guitars, violins, or pianos, the pitch is determined by the length of the vibrating strings. When you pluck a shorter string, it vibrates at a higher frequency, resulting in a higher-pitched sound. Conversely, a longer string vibrates at a lower frequency, producing a lower-pitched sound.

2. Wind Instruments: In wind instruments like flutes, saxophones, or trumpets, the pitch is influenced by the length of the air column inside the instrument. By altering the length of the column, either by opening or closing holes or changing the position of valves, musicians can change the pitch. Longer air columns produce lower pitches, while shorter air columns produce higher pitches.

3. Percussion Instruments: Some percussion instruments, like drums or xylophones, produce sound through vibrating materials of varying lengths. The length of the drum or the length of the xylophone bar affects the pitch of the sound produced. Longer drums or bars create lower pitches, while shorter ones generate higher pitches.

The remaining options (a) "Its color," (c) "Its material," (d) "How loud it is played," and (e) "Its shape" do not have a direct influence on the pitch of a musical instrument. These factors may affect other characteristics, such as the timbre, volume, or resonance of the sound, but they are not the primary determinants of pitch.

Therefore, when considering the factors that affect the pitch of a musical instrument, the most significant factor is the instrument's length (option b).