Your 5th-grade brother keeps telling you that speed and velocity are the same
things. Explain to him how they are different in a way that he will be able to
understand at his age.

Answer:

the answer is "C" One gray sphere, four white spheres, one red sphere

Explanation:

Answer:

Explanation:

The initial vertical velocity is 540sin55° = 442.342103... 442 m/s

The initial horizontal velocity is 540cos55° = 309.731275... 310 m/s

In the real world, both initial velocities would be reduced by air resistance and vertical velocity will be altered by gravity.

Answer:

Explanation:

Givens

delta mv = ?

m = 2 kg

vi = 6 m/s   right is positive

vf = - 4 m/s  left

Formula

delta mv = m (vf - vi)

Solution

delta mv = 2 * (-4 - 6)

delta mv = 2 * - 10

delta mv = - 20 kg m/s

Answer: Down below is the answer in complete sentences!

Explanation:

PART A:

Gravity and Acceleration are two additional forces acting upon the sled.

PART B:

Gravity will affect the sled by pulling it down, since the slope of the hill is negative.

Acceleration will affect the sled by gradually increasing it's speed, since the slope is downwards, which in addition to the initial force exerted plus gravity increases the speed, thus the sled accelerates.

The reason compact fluorescent bulbs can produce as much light as incandescent bulbs but with less energy is due to differences in their energy conversion processes. Incandescent bulbs operate by passing an electric current through a wire filament, which becomes extremely hot and emits light as a result of the high temperature. However, a significant portion of the energy is converted into heat rather than light, making incandescent bulbs less efficient.

On the other hand, compact fluorescent bulbs utilize a different mechanism. They contain a gas-filled tube with a small amount of mercury vapor. When an electric current passes through the gas, it excites the mercury atoms, which then emit ultraviolet light. This ultraviolet light is absorbed by a phosphor coating inside the bulb, causing it to fluoresce and produce visible light. Compared to incandescent bulbs, compact fluorescent bulbs convert a higher proportion of electrical energy into light, resulting in greater efficiency and less energy wastage in the form of heat.

Therefore, the reduced energy consumption of compact fluorescent bulbs compared to incandescent bulbs is due to their more efficient conversion of electrical energy into light, while minimizing the production of other forms of energy such as heat.

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Answer:

The position of the particle is 6m

The velocity of the particle is 16 m/s in negative direction

The acceleration of the object is -40 m/s²

Explanation:

Given;

motion of the particle along a straight line as x = 6 + 4t² - t⁴

The position of the object when t = 2s

x = 6 + 4(2)² - (2)⁴

x = 6 + 16 - 16

x = 6m

The velocity of the object when t = 2s

Velocity = dx/dt

dx/dt = 8t - 4t³

when t = 2s

Velocity = 8(2) - 4(2)³

Velocity = 16 - 32

Velocity = -16m/s

Velocity = 16 m/s (in negative direction)

The acceleration of the object when t = 2s

Acceleration = d²x/dt² = 8 - 12t²

Acceleration = 8 - 12 (2)²

Acceleration =  -40 m/s²

The loop's induced current by using lenz's law flows in a clockwise direction.

According to Lenz's law, the magnetic field produced by the induced current and induced emf in the loop is the opposite of the magnetic field produced by the current in the wire. The magnetic field produced by this current reduces as it flows in a left-to-right direction along the wire, and as it does so, it produces a magnetic field that points into the paper's plane.

Due to the direction of the magnetic field, the direction of the induced current should be clockwise, and the magnitude of the current depends on the size of the loop. The magnetic field produced by this induced current should be into the plane of the paper.

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Note the full question is

A rectangular conducting loop is placed near a long wire carrying a current I as shown in Figure. If I decreases in time, what can be said of the current induced in the loop?

We have that since \(F_1\) is moving to the right and its greater

The direction of Net force is  50m/s to the Right

Option A is correct

From the Question we are told that

Force 1 \(F_1=100\)

Force 2 \(F_2=50\)

Generally the Net force of two forces opposing each other is the difference between them

Therefore

The Net force between Force 1 and 2 is

\(F_t=F_1-F_2\)

\(F_t=100-50\)

\(F_t=50/s\)

In conclusion

Since \(F_1\) is moving to the right and its greater

The direction of Net force is  50m/s to the Right

Option A is correct

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Answer:

it's 40m hun <3

Explanation:

just read up from 2 seconds until you hit the line then read across on the y-axis to what number it is

Explanation:

Wavelength is the distance between two consecutive and equivalent points on a wave. Wavelength can be quantified by measuring the distance between two equivalent and consecutive points, such as the distance between two peaks or two troughs. The scientific symbol for wavelength is a Greek letter called lambda.

Like color, sound waves have two properties: amplitude (height) and frequency. Frequency is a measure of the number of oscillations or cycles of the wave per unit of time and corresponds to our perception of pitch.

The frequency of a sound wave determines the pitch that we perceive. Higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches. For example, a high-frequency sound wave would be perceived as a high-pitched sound, like a whistle, whereas a low-frequency sound wave would be perceived as a low-pitched sound, like a deep rumble. Amplitude, on the other hand, relates to the intensity or loudness of the sound wave, with higher amplitudes corresponding to louder sounds. The frequency of a sound wave is measured in hertz (Hz) and represents the number of complete oscillations the wave makes in one second. It determines how "high" or "low" we perceive the pitch of a sound.

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A nucleus whose total mass is less than the sum of the masses of its individual particles.

What is a nucleus?

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The size of the magnetic force on the wire due to the applied magnetic field of 0.55 T pointing straight down is 0.55 N (to two significant figures).

The magnetic force on a current-carrying wire is given by the equation F = I * L * B * sinθ, where F is the magnetic force, I is current, L is the length of the wire, B is the magnetic field, and θ is the angle between the current and the magnetic field.

In this case, the wire is carrying a current of 12 A (as given in the previous question), the length of the wire is 0.5 m (also given in the previous question), and the magnetic field is 0.55 T (given in the current question). Since the wire is perpendicular to the magnetic field, sinθ is equal to 1.

Plugging in these values into the equation, we get F = 12 * 0.5 * 0.55 * 1 = 0.55 N, rounded to two significant figures. Therefore, the size of the magnetic force on the wire due to the applied magnetic field is 0.55 N.

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The driver of the fire truck hears a frequency of approximately 475.8 Hz. The frequency that the driver of the fire truck hears can be found using the formula:
f' = (v + vd) / (v + vs) * f

where f is the frequency of the siren, v is the speed of sound in air, vs is the speed of the fire truck, and vd is the speed of the observer (in this case, the driver) relative to the air.
Plugging in the given values, we get:
f' = (343 + 31) / (343 + 0) * 439
f' = 475.8 Hz

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A rear-wheel-drive car has the given specifications and parameters: Car weight = 2600 lb;Wheelbase = 84 inches;Center of gravity = 20 inches above the roadway surface and 30 inches behind the front axle; Drivetrain efficiency = 85%; Wheel radius = 14 inches; Overall gear reduction = 7 to 1;

Torque/engine speed curve = Me = 6ne - 0.045ne2. The car is on a paved, level roadway surface with a coefficient of adhesion of 0.75. We have to determine the car's maximum acceleration from rest. To find the maximum acceleration from rest of the rear-wheel-drive car, we have to follow the below steps:

Step 1: Find out the static weight transfer when the car is accelerating from rest.

Step 2: Calculate the force of rolling resistance

Step 3: Find out the force of air resistance.

Step 4: Calculate the force to accelerate the car from rest.

Step 5: Find out the maximum acceleration of the car from rest.

The car would be going 60.5 mph if it could achieve its maximum speed when its engine is producing maximum power.

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Answer:

59.18 kg

Explanation:

use f=ma

f= 580 N

a = 9.8 m/s 2

weigh(m) doesn't change only force(F) changes

Answer: 219.6N

Explanation:

Find the mass of this person by dividing his weight by the accelleration. Remember, F=ma

580 = m*9.8

m = 59.18kg

Then multiply the mass by the new gravitational acceleration on Mars.

59.18*3.711 = 219.6N

Answer:

170 N

Explanation:

F=pressure(pa) ÷ area(m^2)

=100.000 ÷ 0,0017

=170 N

Answer:

Hope the picture will help you

The scenario in which an athlete's wrists will be under tension is when pulling a rope in tug-of-war.

The word tension is used to describe the internal force generated by the body in response to an external stimulus. Tension is often thought of as a feeling of tightness or strain in the muscles and joints, but it can also refer to the internal force that holds a structure together.In which scenario will an athlete's wrists be under tension

An athlete's wrists will be under tension when pulling a rope in tug-of-war. In this activity, the athlete's hands are gripping the rope tightly, and they are using their arms, shoulders, back, and legs to pull against the resistance of the opposing team. This requires a lot of force and generates a significant amount of tension throughout the athlete's body, including the wrists.In conclusion, an athlete's wrists will be under tension when pulling a rope in tug-of-war.

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It would take approximately 716,943 years for the New Horizons space satellite to travel to Proxima Centauri at its current speed.

To calculate the number of years it would take for the New Horizons space satellite to travel to Proxima Centauri, we need to convert the speed of the satellite to the appropriate units and then use the formula for time:

Distance = Speed × Time

Given:

Distance to Proxima Centauri = 4.3 light years

Speed of New Horizons = 53,000 kilometers per hour

First, we need to convert the speed of New Horizons from kilometers per hour to light years per year. To do this, we'll use the conversion factor:

1 light year ≈ 9.461 × \(10^{12\) kilometers

Speed of New Horizons in light years per year:

Speed in light years per year = (53,000 kilometers per hour) × (1 year / 8766 hours) × (1 light year / 9.461 × \(10^{12\) kilometers)

Speed in light years per year ≈ 0.000006003

Now, we can calculate the time it takes to travel to Proxima Centauri:

Time = Distance / Speed

Time = 4.3 light years / 0.000006003 light years per year

Time ≈ 716,943 years

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A force vector with magnitude 750 N and angle 30⁰ can be written as a Cartesian vector as: F = 375√3 i + 375 j

A vector can be written as its x-component and y-component.

Suppose the angle of a vector F with the positive x-axis is θ, then its components are given by:

Fx = F cos θ

Fy = F sin θ

Then,

F = Fx i + Fy j

  = F cos θ i + F sin θ j

In the given problem, θ = 30⁰, F = 750.

Hence,

Fx = 750 cos 30⁰

    = 750 (1/2)√3 = 375√3

Fy = 750 sin 30⁰

   = 750 (1/2) = 375

Thus, the vector can be written as a Cartesian vector:

F = 375√3 i + 375 j

Your question is incomplete, most likely your question was:

Express the force as a Cartesian vector. F 750 N. The angle of the force vector with the horizontal is 30⁰.

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Answer:

A

Explanation:

Ap3X

Make be branilest if truly the best!

0.769 joule is the amount of energy wasted by the motor

power=work done/time

power=10×5/65

power=0.769 joule

In physics, energy is the capacity to out work. It may take on several forms, including potential, kinetic, thermal, electrical, chemical, radioactive, etc. Heat and labor are two further examples of energy being transferred from one body to another. Once it has been transmitted in line with its nature, energy is always disseminated. Thus, although exertion can provide mechanical energy, heat transfer might produce thermal energy.

All types of energy have the characteristic of motion. For instance, a body has kinetic energy if it is moving. A tensioned item, such a spring or bow, may move even while at rest because of the device's design, which incorporates potential energy.

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Answer:

122.5m

Explanation:

Δy=1/2gt^2

1/2(9.8*5^2)= 122.5

*this does not take into account direction or friction forces such as air resistance*

Answer:

The energy that can be stored in the capacitor is 239 nJ

Explanation:

We first calculate the capacitance of each material. Let C₁ be the capacitance of pyrex glass and C₂ be the capacitance of polystyrene.

C₁ = κ₁ε₀A/d where κ₁ = dielectric constant of pyrex glass = 5, A = area of plates = L² where L = length of square plate = 7.40 cm = 7.40 × 10⁻² m and d = thickness of pyrex slab = 1.60 mm = 1.60 × 10⁻³ m and ε₀ = permittivity of free space = 8.854 × 10⁻¹² F/m

C₁ = κ₁ε₀A/d = κ₁ε₀L²/d = 5 × 8.854 × 10⁻¹² F/m × (7.40 × 10⁻² m)²/1.60 × 10⁻³ m = 2424.2252/1.60 × 10⁻¹¹ F = 1515.14 × 10⁻¹¹ F = 15.2 × 10⁻⁹ F = 15.2 nF

C₂ = κ₂ε₀A/d where κ₂ = dielectric constant of polystyrene = 3, A = area of plates = L² where L = length of square plate = 7.40 cm = 7.40 × 10⁻² m and d = thickness of polystyrene slab = 1.60 mm = 1.60 × 10⁻³ m and ε₀ = permittivity of free space = 8.854 × 10⁻¹² F/m

C₁ = κ₁ε₀A/d = κ₁ε₀L²/d = 3 × 8.854 × 10⁻¹² F/m × (7.40 × 10⁻² m)²/1.60 × 10⁻³ m = 1454.5351/1.60 × 10⁻¹¹ F = 909.08 × 10⁻¹¹ F = 9.09 × 10⁻⁹ F = 9.09 nF

Since the capacitors are in series, we find their effective capacitance C from

1/C = 1/C₁ + 1/C₂

C = C₁C₂/(C₁ + C₂)

= 15.2 × 10⁻⁹ F × 9.09 × 10⁻⁹ F/(15.2 × 10⁻⁹ F + 9.09 × 10⁻⁹ F)

= 138.168 × 10⁻¹⁸/24.29 × 10⁻⁹ F

= 5.69 × 10⁻⁹ F

The amount of electrical energy stored in a capacitor is given by W = 1/2CV² where C = capacitance and v = voltage applied. Now C = 5.69 × 10⁻⁹ F and V = 84.0 V for this capacitor

So W = 1/2 × 5.69 × 10⁻⁹ F × 84.0 V

= 238.98 × 10⁻⁹ J

≅ 239 × 10⁻⁹ J

= 239 nJ

So the energy that can be stored in the capacitor is 239 nJ

(a) The spring constant of the bungee cord is 62.5 N/m

(b) The extension of the bungee cord past its natural length is 16 m.

(c) The maximum extension of the bungee cord to get it to break is 320 m.

The spring constant of the bungee cord is calculated by applying the following equation as shown below.

F = kx

where;

k = F / x

k = ( 500 N ) / ( 8 m )

k = 62.5 N/m

The extension of the bungee cord is calculated as follows;

x = W / k

x = ( mg ) / k

x = ( 102 kg  x 9.8 m/s² ) / ( 62.5 N/m )

x = 16 m

The maximum extension of the bungee cord is calculated as follows;

x = F / k

x = ( 20,000 N ) / ( 62.5 N/m )

x = 320 m

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We can deduce here that the source of the energy transformation that would occur if a heater were added to a circuit would be chemical energy.

A power plant, also known as a power station or generating station, is a facility that generates electrical energy from various sources. It is designed to produce large amounts of electricity to meet the demand of consumers, industries, and other electricity users.

The chemical energy stored in the fuel that is burned at the power plant is converted into electrical energy, which is then converted into thermal energy by the heater. This is an example of energy transformation, which is the process of changing one form of energy into another

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The force that acts between a pair of magnetic poles depends on several factors, including the strength of the poles and the distance between them.

Strength of the Poles: The force between magnetic poles is directly proportional to the product of their magnetic strengths. The strength of a magnetic pole is determined by the amount of magnetic flux it produces, which is determined by the magnitude of its magnetic field. Distance between the Poles: The force between magnetic poles is inversely proportional to the square of the distance between them. As the distance between the poles increases, the force between them decreases rapidly. This is known as the inverse square law.

Mathematically, the force between magnetic poles can be expressed as:

F ∝ (m1 * m2) / (r^2)

Where F is the force, m1 and m2 are the strengths of the poles, and r is the distance between them.

In summary, the force between magnetic poles depends on the strength of the poles (magnetic flux produced) and the distance between them. Stronger poles and shorter distances result in greater magnetic forces, while weaker poles and longer distances result in weaker forces.

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