Linearize equation T=KL^n​

The power used, given that a force of 20 N is used to push the shopping cart 3.5 m in 2 seconds is 35 W

First, we shall determine the work done in pushing the cart. Details below:

Wd = Fd

Wd = 20 × 3.5

Wd = 70 J

Finally, we shall determine the power used in pushing the cart. Details below:

P = Wd / t

P = 70 / 2

P = 35 W

Thus, we can conclude that the power used is 35 W

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The correct answer is A continúe moving with constant velocity

a. The velocity must remain constant to keep the ratio of frequency and wavelength in check. The wave speed is determined by the properties of the medium through which the wave travels, and is independent of the frequency and wavelength of the wave.

c. 0.35 m. The wavelength can be calculated using the formula: wavelength = wave speed / frequency. Plugging in the given values, we get wavelength = 4.5 m/s / 25 Hz = 0.18 m/Hz = 0.35 m (rounded to two decimal places).

Answer:

62.5 °

Explanation:

✓From law of reflection, angle of incidence equals angles of reflection .

✓the angle between the reflected ray can be determined using trigonometry, we know that

horizontal distance x =60.1 cm

the vertical distance is y =31.3

Then

tan( θ) =( y / x)

If we substitute the values we have,

tan θ = 31.3 / 60.1

θ = tan⁻¹ (0.5208)

θ = 27.5°

This angle is been measured using x-axis (horizontal)BBut in optics we can measured with respect to y-axis then angle becomes

θ = 90 - 27.5

θr = 62.5 °

θr = θi= 62.5°

the angle of incidence θiat which the laser beam strikes the mirror is 62.5°

Answer:

The  horizontal displacement is  \(Adj = 114.71 \ m\)

Explanation:

From the question we are told that  

    The  angle at which the string is maintained is  \(\theta = 41 ^o\)

      The length of string reeled in is  \(l = 152 \ m\)

Using the SOHCAHTOA formula

   We have that the hypotenuse(Hyp) is  l  =  152

Hence the  horizontal displacement of the kite  which is the Adjacent(Adj)  can be evaluated as  

     \(cos \theta = \frac{Adj}{Hyp }\)

substituting values

     \(cos(41) = \frac{Adj}{152}\)

=>   \(Adj = 114.71 \ m\)

The magnitude of the electric flux through the sheet is 4.05 N m² C⁻¹ (Option E).

The electric flux through a surface is given by the product of the electric field strength and the area of the surface projected perpendicular to the electric field.

In this case, the electric field strength is 18 N C⁻¹, and the area of the sheet projected perpendicular to the electric field is 0.450 m²

(since the normal to the sheet makes an angle of 60° with the electric field). Multiplying these values gives the electric flux:

Electric flux = Electric field strength × Area

Electric flux = 18 N C⁻¹ × 0.450 m²

Electric flux = 8.1 N m² C⁻¹

In summary, the magnitude of the electric flux through the sheet is 4.05 N m² C⁻¹. This value is obtained by multiplying the given electric field strength by the projected area of the sheet perpendicular to the electric field.

The angle of 60° is taken into account to determine the effective area for calculating the flux.(Option E).

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The magnitude of power needed to keep the car traveling at a constant speed of 80 km/h would be  7 × \(10^4\) watts.

The initial speed of the car is 95 km/h = 26.39 m/s, and the final speed is 65 km/h = 18.06 m/s. The change in speed over the 7.0 s interval is:

Δv = vf - vi = 18.06 m/s - 26.39 m/s = -8.33 m/s

The acceleration of the car can be found using:

a = Δv/t = -8.33 m/s / 7.0 s = -1.19 m/s^2

This is the deceleration of the car when it's in neutral. The force of friction acting on the car is:

F = ma = (1400 kg)(1.19 m/s^2) = 1666 N

To keep the car traveling at a constant 80 km/h = 22.22 m/s, a force equal in magnitude but opposite in direction to the force of friction must be applied. The power required to maintain this speed is:

P = Fv = (1666 N)(22.22 m/s) = 37000 W ≈ 3.7 × \(10^4\) W

Therefore, the power needed to keep the car traveling at a constant 80 km/h is approximately 7 × \(10^4\) watts.

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Physics deal with objects small as subatomic particles and large as galaxies.

These numbers are difficult to write, so it is much more convenient to write them in scientific notation.

Answer:

60 kilometers per hr

Explanation:

Answer:

Mandible.

Explanation:

The mandible in the bone that allows you to open and close your mouth, otherwise known ad the jawbone.

Answer:

mandible

Explanation:

which is also the lower jaw and it allows the mouth to open and close

hope i helped

The quantity of heat energy that must be transferred to 2.25 kg of brass to raise its temperature from 20 °C to 240 °C is 195030 J

First, we shall list out the given parameters from the question. This is shown below:

The quantity of heat energy that must be transferred can be obtained as follow:

Q = MCΔT

= 2.25 × 394 × 220

= 195030 J

Thus, we can conclude quantity of heat energy that must be transferred is 195030 J

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Answer:

\(a=-8.89\ m/s^2\)

Explanation:

Initial velocity, u = 85 m/s

Final velocity, v = 45 m/s

Time, t = 4.5 s

We need to find the acceleration of the dragster. The rate at which the velocity of an object changes is called the acceleration of an object. It can be given by :

\(a=\dfrac{v-u}{t}\\\\a=\dfrac{45-85}{4.5}\\\\a=-8.89\ m/s^2\)

So, the acceleration of the dragster is \(8.89\ m/s^2\) and it is deaccelerating.

Answer: Motivation, Community, Communal Approach

Answer:

Motivation, Community, Communal Approach

Explanation:

Answer:

Friendships can have a major impact on your health and well-being, but it's not always easy to build or maintain friendships. Understand the importance of friendships in your life and what you can do to develop and nurture friendships

Answer:

Explanation:

#2 and for 2 i think that its the first one which says that there have to be a potential difference

#3 the answer is not at all

Answer:

Momentum is a term used in physics to describe an object's resistance to change its motion. It is a measure of an object's mass and velocity and can be mathematically represented by the equation p = mv, where p is momentum, m is mass, and v is velocity.

Momentum is a vector quantity, meaning it has both magnitude and direction. It can be thought of as the amount of motion an object possesses in a particular direction. For example, a large truck traveling at a high speed has more momentum than a small car traveling at a slower speed, even though they both may have the same mass.

In physics, momentum plays a crucial role in determining how objects will react when they collide. If two objects collide and have equal and opposite momentum, they will typically bounce off each other. However, if one object has much more momentum than the other, it is likely to push the other object aside and continue on its original path.

It is also important to note that momentum is conserved in isolated systems. This means that if two or more objects collide or interact with each other, the total momentum before the collision is equal to the total momentum after the collision.

In conclusion, momentum is a fundamental concept in physics that helps to describe and understand the motion of objects. It is a combination of an object's mass and velocity, and it determines how objects will interact when they collide.

Please mark me brainliest if I helped.

Answer:

a)  W = 643.5 J, b) W = -427.4 J  

Explanation:

a) Work is defined by

       W = F. x = F x cos θ

in this case they ask us for the work done by the external force F = 165 N parallel to the ramp, therefore the angle between this force and the displacement is zero

       W = F x

let's calculate

       W = 165  3.9

        W = 643.5 J

b) the work of the gravitational force, which is the weight of the body, in ramp problems the coordinate system is one axis parallel to the plane and the other perpendicular, let's use trigonometry to decompose the weight in these two axes

       sin θ = Wₓ / W

       cos θ = Wy / W

        Wₓ = W sinθ = mg sin θ

        Wy = W cos θ

the work carried out by each of these components is even Wₓ, it has to be antiparallel to the displacement, so the angle is zero

      W = Wₓ x cos 180

      W = - mg sin 34  x

let's calculate

       W = -20 9.8 sin 34 3.9

        W = -427.4 J

The work done by the component perpendicular to the plane is ero because the angle between the displacement and the weight component is 90º, so the cosine is zero.

When a charged object is at rest, the electric field lines emanating from it are radially symmetric and point outward in all directions, forming a pattern that depends on the magnitude and sign of the charge. If the charged object is set in motion, it creates a changing electric field that propagates outward from the object at the speed of light.

The direction of magnetic field lines is depicted using arrows or lines that indicate the direction of the magnetic field at each point in space. The convention for drawing magnetic field lines is that they always form closed loops, and the direction of the field is tangential to the bar at each point.

Yes, electric fields can affect magnetic fields and vice versa. Electric and magnetic fields are intimately related and form two sides of the same coin, as described by Maxwell's equation of electromagnetism.

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Answer:

The digestive system is made up of the gastrointestinal tract—also called the GI tract or digestive tract—and the liver, pancreas, and gallbladder. The GI tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system.The small intestine has three parts. The first part is called the duodenum. The jejunum is in the middle and the ileum is at the end. The large intestine includes the appendix, cecum, colon, and rectum. The appendix is a finger-shaped pouch attached to the cecum. The cecum is the first part of the large intestine. The colon is next. The rectum is the end of the large intestine

Explanation:

The voltage between the plates is 3.9 × \(10^-^3\) V.

The work-energy theorem states that the delta in the equation equals the change in kinetic energy plus the change in potential energy. Here, a charge's potential energy is expressed as qV, where V is the position's electric potential.  The greater the change in voltage per unit distance, the greater the electric field.

The kinetic energy of the electrons = 4.1 × \(10^-^1^5\) J

Charge of the electron = 1.602 × \(10^-^1^9\) coulomb

Using,

     ΔU = q × ΔV

4.1 × \(10^-^1^5\) = 1.602 × \(10^-^1^9\) × ΔV

      ΔV  = 3.9 × \(10^-^3\) V

Therefore, the voltage between the plates is 3.9 × \(10^-^3\) V.

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Answer:

the POLAR climate is the coldest climate region and includes...

Explanation:

It includes the ice cap ,and Artic and  tundra climates

The skater's final angular velocity is approximately 9.86 rad/s.

The skater's final angular velocity can be calculated using the principle of conservation of angular momentum. The equation for angular momentum is given by:

L = Iω

where L is the angular momentum, I is the moment of inertia, and ω is the angular velocity.

Initially, the skater has an angular momentum of:

L_initial = I_initial * ω_initial

Substituting the given values:

L_initial = 2.12 kg m² * 3.25 rad/s

The skater's final angular momentum remains the same, as angular momentum is conserved:

L_final = L_initial

The final moment of inertia is given as 0.699 kg m². Therefore, the final angular velocity can be calculated as:

L_final = I_final * ω_final

0.699 kg m² * ω_final = 2.12 kg m² * 3.25 rad/s

Solving for ω_final:

ω_final = (2.12 kg m² * 3.25 rad/s) / 0.699 kg m²

Hence, the skater's final angular velocity is approximately 9.86 rad/s.

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The component of the solar magnetic field that is dragged out of the solar corona and into the Solar System by the solar wind flow is known as the interplanetary magnetic field (IMF), which is now more commonly referred to as the heliospheric magnetic field (HMF).

Our planet is shielded from cosmic radiation and charged particles from our Sun by the magnetic field, which is created by the motion of molten iron in the Earth's core. Additionally, it offers the foundation for compass navigation.

It travels throughout the solar system on the solar wind. We refer to the magnetic field of the Sun as the "Interplanetary Magnetic Field," or "IMF," outside of the planets. The IMF has a spiral shape as a result of the Sun's rotation (once every 27 days), and is known as the "Parker spiral" after the scientist who first described it. The most crucial component of auroral activity is the interplanetary magnetic field's (Bz) north-south direction.

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If 3 circular bars made up of glass, steel, aluminium having equal cross section applied with muiltiaxial load at same point in same direction , The bar will produce more stress: glass

If 3 circular bars made up of glass, steel, aluminium having equal cross section applied with muiltiaxial load at same point in same direction, the bar made of glass will produce more stress.

This is because the modulus of elasticity of glass is lower than that of steel and aluminium. The modulus of elasticity is a measure of a material's resistance to deformation under load. A lower modulus of elasticity means that the material is more prone to deformation and therefore, will produce more stress under the same load.

In general, the stress produced in a material under load is given by the equation:

stress = load / cross-sectional area

Since the cross-sectional area of the bars is equal and the load applied is the same, the stress produced will depend on the modulus of elasticity of the material. Therefore, the bar made of glass will produce more stress under the same load as compared to the bars made of steel and aluminium.

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The steel bar will produce the most stress when applied with a multi-axial load at the same point in the same direction, as steel is the strongest of the three materials (glass, steel, and aluminium).

The bar made of steel will produce more stress under a multi-axial load at the same point in the same direction. This is because steel has a higher Young's modulus, or the measure of the ability of a material to withstand changes in length when under tension or compression, than glass or aluminum. Therefore, it will experience greater stress under the same loading conditions. Steel has a much higher Young's modulus than glass or aluminum, meaning it will experience greater stress under the same loading conditions.

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Answer:

The drum struck with a lot of energy would be louder than the drum struck with little energy because there is a harder impact on it

Explanation:

(A) The water will shrink when is heated above 4°C. (B).water at an initial temperature of 33.3°C will be expand by twice as much when it is raised by 1°C compared to water at 30°C.

The anomalous expansion of water refers to the fact that its volume increases upon cooling from 4°C to 0°C, and then contracts upon further cooling to 0°C, and continues to contract upon further cooling. Similarly, when water is heated, its volume first contracts until it reaches 4°C, and then expands upon further heating.

To determine at what temperature water shrinks when heated, we need to find the point at which the coefficient of volume expansion, β, becomes negative. The coefficient of volume expansion is defined as the fractional change in volume per degree Celsius change in temperature, i.e.,

β = (1/V)  (dV/dT)

where V is the volume of the water and dV/dT is the rate of change of volume with respect to temperature.

At temperatures below 4°C, the coefficient of volume expansion is positive, indicating that water expands upon heating. However, at temperatures above 4°C, the coefficient of volume expansion becomes negative, indicating that water contracts upon heating.

Therefore, water will shrink when heated above 4°C.

To determine the initial temperature at which water will expand by twice as much when raised by 1°C, we can use the formula for the coefficient of volume expansion:

β = (1/V)  (dV/dT)

We want to find the initial temperature T such that

(dV/dT)T = 2 (dV/dT)30

where (dV/dT)T is the rate of change of volume with respect to temperature at temperature T, and (dV/dT)30 is the rate of change of volume with respect to temperature at 30°C.

Using the coefficient of volume expansion for water, we have

β = 3α

where α is the coefficient of linear expansion, which is approximately constant for small temperature changes. Therefore, we can write

(dV/dT) = V × 3α

Substituting this into the equation above and simplifying, we get

T = 30 + 10/3 = 33.3°C

Therefore, water at an initial temperature of 33.3°C will expand by twice as much when raised by 1°C compared to water at 30°C.

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Answer:

partecls

Explanation:

because they are to small to see with plain eyes

Answer:

See Below

Explanation:

Mass of child = 21 kg

Mass of bicycle = 5.9 kg

Total mass = 22 + 5.9 = 27.9 kg

Velocity = 4.5 m/s

1) Total momentum of the child and the bike together

= Total mass * Velocity

= 27.9*4.5

= 125.55 kg m per second

2) Momentum of the child

= Mass of child*Velocity

= 21*5.9

= 123.9 kg m per second

3) Momentum of the bike

= Mass of bike*Velocity

= 5.9*4.5

= 26.55 kg m per second

Answer:

2400kgm²

Explanation:

Rotational inertia=mass x radius²