Is a hockey player moving at a constant velocity across frictionless ice, balance or unbalance

Answer:

have a greater mechanical advantage

Explanation:

this enables the mechanism to output a large amount of force compared to the force put into it due to ratio of the wheel and the axle therefore providing enough force to steer the rather heavy wheels while saving the driver some muscle power

Answer:

amplitude

Explanation:

amplitude of a wave is the maximum displacement of a point from its rest position.

hope you get it,

In a series circuit consisting of a resistor and capacitor with a given time constant, the addition of an identical capacitor in series does not change the time constant.

When an identical capacitor is added in series to the existing circuit, the time constant remains the same. The time constant is determined by the product of the resistance and the total capacitance in the circuit. Since the added capacitor does not change the resistance or the total capacitance, the time constant remains unchanged.

When an identical capacitor is connected in parallel with the first capacitor, the total capacitance in the circuit increases. The time constant for the new circuit is calculated by multiplying the resistance by the total capacitance. Since the capacitance has increased, the time constant for the new circuit will be larger than the time constant of the original circuit. This means that the new circuit takes longer to charge or discharge compared to the original circuit.

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Answer:

Motion energy, or energy of motion

Explanation:

Answer:

Kinetic Energy is the energy of movement

Explanation:

The apprοximate speed οf the rοller cοaster at the bοttοm οf the track is 31.6 m/s.

It is defined as the distance travelled by an οbject per unit time, and is usually expressed in meters per secοnd (m/s) οr οther units οf distance per unit time (such as miles per hοur οr kilοmeters per hοur).

Nο, the speed οf the rοller cοaster at the bοttοm οf the track is nοt 45 m/s.

Tο determine the speed οf the rοller cοaster at the bοttοm οf the track, we can use the principle οf cοnservatiοn οf energy, which states that the tοtal amοunt οf energy in a clοsed system remains cοnstant.

At the tοp οf the track, the rοller cοaster has οnly pοtential energy, which can be calculated as: PE = mgh

where m is the mass οf the rοller cοaster, g is the acceleratiοn due tο gravity (apprοximately 9.81 m/s²), and h is the height οf the track (51 meters). Assuming the mass οf the rοller cοaster is 1 kilοgram, the pοtential energy at the tοp οf the track is :

\(PE = (1 kg)(9.81 m/s^2)(51 m) = 502.31 J\)

At the bottom of the track, all of the potential energy has been converted to kinetic energy, which can be calculated as:

\(KE = 1/2 mv^2\)

where v is the speed of the roller coaster. Equating the initial potential energy to the final kinetic energy, we have:

PE = KE

\(mgh = 1/2 mv^2Solving for v, we get:v = sqrt(2gh)v = sqrt(2 x 9.81 m/s^2 x 51 m) = sqrt(999.162) = 31.6 m/s (approximately)\)

Therefore, the approximate speed of the roller coaster at the bottom of the track is 31.6 m/s.

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Answer:

1=8 ohms 2=0.5 Amps

Explanation:

Answer:Magnitude of the car's acceleration is 3.5 m/s²

Given:

Mass of car = 1,000 kg

Net force applied by car = 3,500 N

Find:

Magnitude of the car's acceleration

Computation:

Net force = Mass × Acceleration

So,

3,500 = 1,000 × Acceleration

Acceleration = 3,500 / 1,000

Acceleration = 3.5 m/s²

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Experiment 1 Understanding of low voltage electrical apparatus: Purpose of the experiment1) Master the usage of common electrical tools.2) Master the common identification methods of low pressure.3) Master the function of low-voltage electrical apparatus and their correct application. Experiment contents and requirements

The experiment requires observing common low-voltage apparatus and understanding their structure. The following requirements are required:1. Drawing electrical symbols2. Writing text symbols3. Describing the basic working principle and function of low-voltage electrical components that are observed in the experiment report and content for the experiment report, follow this steps:1. Purchase the uniform standard experimental report paper in the academic affairs office.2. Fill in according to the items specified in the test report.3. Draw the electrical symbols and write the text symbols according to the observed low-voltage electrical components.4.

According to the observed low-voltage electrical components, the basic working principle and function are briefly described.

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Answer:

indepent valuable and random variable

Answer:3.4 miles west

Explanation:

Answer:

IDC

Explanation:

I DON'T UNDERSTAND........

Answer:

1, 3, 5,

Explanation:

A concave mirror is a hollowed sphere that has been cut into parts, each of which has a painted exterior. The plant's image has the qualities of a real, inverted, and smaller image. So, the correct options are A, C and E.

A hollow spherical formed into a mirror when the external surface of the each cut portion was painted, reflecting light from the interior surface. This kind of mirror is known as a concave mirror. When the concave mirror is placed too close to the item, a magnified and phoney image results.

This has an inward-curving reflective surface that faces away from the source of light. Light is reflected internally to a single focus point. Headlights on cars and torches are examples of concave mirrors. But, as the distance grows between the object and the mirror, the size of the image reduces and a real image is produced.

Thus, the correct options are A, C and E.

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Your question is incomplete, most probably the complete question is :

Leo places a plant in front of the center of curvature of a concave mirror. Which characteristics will the image of the plant have? Check all that apply.

It will take the car 6.25 seconds to travel from 37 m/s to 60 m/s with an acceleration of 3.68 m/s².

For the first question, we can use the equation:

distance = 0.5 x acceleration x time^2

We know the acceleration (7.25 m/s²) and the time (35 seconds), so we can plug those in:

distance = 0.5 x 7.25 m/s² x (35 s)^2

distance = 0.5 x 7.25 m/s² x 1225 s²

distance = 4448.125 meters

Therefore, the airplane covered a distance of 4448.125 meters before taking off the ground.

For the second question, we can use the equation:

final velocity = initial velocity + acceleration x time

We know the initial velocity (37 m/s), the final velocity (60 m/s), and the acceleration (3.68 m/s²), so we can rearrange the equation to solve for time:

time = (final velocity - initial velocity) / acceleration

time = (60 m/s - 37 m/s) / 3.68 m/s²

time = 6.25 seconds

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Answer:

37° is how far above the horizon  the moon is when its image reflected in calm water is completely polarized.

When the moon's image reflected in calm water is completely polarized, it is due to Brewster's angle, which is the angle of incidence at which light with a particular polarization is perfectly transmitted through a transparent dielectric surface, with no reflection. In this scenario, the angle of incidence and the angle of refraction are related through the refractive indices of the two media (air and water) and Snell's law.

For complete polarization, the tangent of Brewster's angle equals the ratio of the refractive indices of water and air (approximately 1.33). Therefore, Brewster's angle is about 53°. Since the angle of incidence and the angle of elevation are complementary angles, the angle of elevation (how far above the horizon the moon is) is approximately 90° - 53° = 37°.

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Answer:

Explanation:

weight on moon = 1/6* weight on earth

69.3=1/6*weight on earth

weight on earth = 69.3*6

weight on earth = 415.8 N

Answer:

The rms voltage across the capacitor is approximately 224.926 V.

a) To find the rms current (I) in the RLC series circuit, we can use the formula:

I = V / Z

Where V is the rms potential difference provided by the source, and Z is the impedance of the circuit.

The impedance of an RLC series circuit is given by:

Z = √(R^2 + (Xl - Xc)^2)

Where R is the resistance, Xl is the inductive reactance, and Xc is the capacitive reactance.

V = 210 V

f = 250 Hz

L = 0.35 H

C = 70 uF

VR = 45 V

First, let's calculate the reactances:

Xl = 2πfL

Xc = 1 / (2πfC)

Substituting the values:

Xl = 2π * 250 * 0.35

Xc = 1 / (2π * 250 * 70e-6)

Calculating:

Xl ≈ 549.78 Ω

Xc ≈ 114.591 Ω

Next, we can calculate the impedance:

Z = √(R^2 + (Xl - Xc)^2)

Substituting the given VR value, we have:

VR = I * R

Rearranging the equation to solve for R:

R = VR / I

Substituting the given values:

45 = I * R

Solving for R:

R = 45 / I

Substituting the values of Xl and Xc into the impedance equation:

Z = √(R^2 + (549.78 - 114.591)^2)

Substituting the value of Z into the formula for rms current:

I = V / Z

Calculating:

I ≈ 1.962331945 A

Therefore, the rms current in the RLC series circuit is approximately 1.962 A.

b) The resistance (R) in the circuit can be found using the equation:

R = VR / I

Substituting the given values:

R = 45 / 1.962331945

Calculating:

R ≈ 22.943 Ω

Therefore, the resistance in the RLC series circuit is approximately 22.943 Ω.

c) The rms voltage across the inductor (VL) can be calculated using the formula:

VL = I * Xl

Substituting the values:

VL = 1.962331945 * 549.78

Calculating:

VL ≈ 1,076.644 V

Therefore, the rms voltage across the inductor is approximately 1,076.644 V.

d) The rms voltage across the capacitor (Vc) can be calculated using the formula:

Vc = I * Xc

Substituting the values:

Vc = 1.962331945 * 114.591

Calculating:

Vc ≈ 224.926 V

Therefore, the rms voltage across the capacitor is approximately 224.926 V.

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Answer:

No

Explanation:

The gravitational force always acts opposite the direction of motion. Air resistance only acts on objects that are moving. The force of friction does not exist when an object is stationary. All objects experience a normal force.

btw pls mark as branliest! Thanks!

Answer:

It is because the load is in between fulcrum and effort making a longer effort arm than the load arm resulting to multiplication of force and a mechanical advantage of greater than 1.

Explanation:

The distance from the fulcrum to the effort is the effort arm where as the distance from the fulcrum to the load is the load arm.

The first class lever has a mechanical advantage that varies per the position of the load with respect to effort position from the fulcrum. They have the fulcrum at the middle. For example, a beam balance and a pliers. The formula to remember is FLE for easy categorization of the lever classes.

The second class lever , the load is at the middle.For example a wheel barrow and a bottle opener. In this class, the effort arm is longer than the load arm.The effort is force multiplication making the mechanical advantage to be greater than 1.

The third class of lever has effort in the middle.For example a spade or a knife.In this class effort arm is shorter than the load arm, causing change in direction of force. The effect is a mechanical advantage less than 1.

Answer:

look in internet u can find online converter and there u will get a rel answer

Explanation:

Answer:

Sorry for the bad drawing, as you have not specified whether is should be open switch or close I have drawn both

I hope it helps.

The process of conduction takes place only in solids. It does not happen in liquids and gases. Heat is transferred through fluids by the process of convection. Infrared radiation transfers energy as a wave: it can travel through a vacuum.

It is the transfer of heat or electricity through a material without any physical movement of the material itself.

Conduction happens in solids, liquids, and gases, but solids are more effective at it.

The material's thermal conductivity affects how quickly heat transfers through it.

The gradient in temperature or the difference in electrical potential determines how much heat or electricity may go through a substance.

The transfer of heat or electricity through a material can be influenced by various factors, such as the type of material, its thickness, temperature, pressure, and electromagnetic fields.

Conductors are materials that allow heat or electricity to flow through them with ease, whereas insulators impede the flow of heat or electricity.

Conduction is a key factor in various industrial and technological applications, including heating and cooling systems, electrical power generation and distribution, and telecommunications.

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Density of iron block is 7. 89 g/cm 3

Define density.

The substance's mass per unit of volume is its density (also known as specific mass or volumetric mass density). The Latin letter D can also be used to represent density, however the most common symbol is ρ (the lower case Greek letter rho). The mathematical definition of density is mass divided by volume.

Density, ρ =  Mass (m)/ Volume(V)

Volume = 3 cm × 3cm × 3cm

            =  27 cm ³

Mass  =  213 g

Density  =  m/V

             = 213/27

             =  7.89 g / cm³

The word "specific volume," which is infrequently used in thermodynamics, refers to the reciprocal of a substance's density. A substance's density is an intense attribute in that its mass grows rather than its density when its amount is increased.

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Answer:

The correct options are;

a. ii. Savery engine The boiler could not withstand the steam pressure needed to lift water beyond 6 m.

b. i.Gunpowder engine The engine had no mechanism to move the piston back to complete a cycle

c. iii. Newcomen engine The continual reheating needed after each cooling of the engine cylinder required tremendous amount of thermal energy

d. iv. Watt engine This engine was large and massive and less efficient than thought possible

Explanation:

a. The evaporation of the water due to the effect of creating a vacuum limits the Savery's engine pressure differential to about 20 (which is approximately 6 meters) to 25 feet of suction

b. In The gunpowder engine after providing power to a mass, there is less provision to move the piston to a position to lift another mass

c. Energy from burning of fuel was needed to heat the steam cylinder (the steam and the steel wall) repeatedly which consumed a considerable energy in the Newcomen engine

d. In the Watt steam engine the increased efficiency attainable was 17.4% while the actual efficiency was about 11% with the addition of a separate condenser unit.

Acceleration will increase as the angle of incline does, and as a result, force will as well.

The gravitational force acting on the cart increases as the slope of the incline increases, causing it to accelerate more quickly.The ramp's steepness will cause an increase in inclination. As a result, the acceleration increases as the inclination angle increases. This acceleration causes the object to descend with greater speed.

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The acceleration of the girl and the sled is 1.075 m/s².

Force of friction between the sled and the snow can be calculated as;

Frictional force = Coefficient of friction x Normal force

First, we need to calculate the normal force of the sled on the snow. Since the sled is on an incline with an angle of 30 degrees, we need to resolve the forces into components perpendicular and parallel to the incline:Resolve forces parallel to the incline:

Force parallel to incline (Fpar) = Force of girl pushing sled - Component of weight of sled parallel to the inclineFpar = 195 - mgsin30°Fpar = 195 - (65 x 9.81 x 0.5)Fpar = 98.1N

Resolve forces perpendicular to the incline:Force perpendicular to incline (Fperp) = Component of weight of sled perpendicular to the inclineFperp = mgcos30°Fperp = 65 x 9.81 x 0.866Fperp = 564.2N

Now we can calculate the normal force of the sled on the snow:Normal force = Fperp

Normal force = 564.2N

Now we can calculate the force of friction between the sled and the snow:Frictional force = Coefficient of friction x Normal force

Frictional force = 0.10 x 564.2N

Frictional force = 56.42N

The net force acting on the sled can now be calculated as:Net force = Force of girl pushing sled - Force of frictionNet force = 195 - 56.42Net force = 138.58N

Now we can calculate the acceleration of the girl and the sled using the formula:Net force = mass x acceleration138.58 = (65 + mass of girl) x a

We don't know the mass of the girl, but we can use her weight to calculate it:Weight of girl = mgWeight of girl = 65 x 9.81Weight of girl = 637.65N

We know that the force of the girl pushing the sled is equal to her weight, so we can use this to find her mass:195 = mg637.65 = mgm = 63.77kg

So the total mass of the sled and the girl is:65 + 63.77 = 128.77kg

Now we can substitute this into the formula for acceleration:138.58 = 128.77 x a a = 1.075 m/s²

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The time available on Machine II must lie between 1 minute and 3 minutes. The shadow price for Resource 2 (associated with constraint 2) is $3 per minute.

(a) To determine the range of available time on Machine II, we need to consider the constraints provided. The time available on Machine II must be between the time required for Type A souvenirs and the time required for Type B souvenirs.

Time required for Type A souvenir on Machine II: 1 minute

Time required for Type B souvenir on Machine II: 3 minutes

Therefore, the time available on Machine II must lie between 1 minute and 3 minutes.

The meaningful solution for the available time on Machine II is 1 min ≤ Machine II ≤ 3 min.

(b) To maximize the profit, we need to determine the optimal production quantities for Type A and Type B souvenirs given a change in the available time on Machine II.

Let's assume the change in available time on Machine II is represented by k.

To maximize the profit, we need to find the production quantities that maximize the total profit. Let's denote the production quantity for Type A souvenirs as x and the production quantity for Type B souvenirs as y.

The objective function for the profit can be expressed as:

Profit = 0.80x + 1.60y

Subject to the following constraints:

2x + y ≤ 120 (Machine I constraint)

x + 3y ≤ (300 + k) (Machine II constraint)

Using linear programming techniques, the optimal solution will depend on the value of k.

The statement "Ace Novelty's profit is maximized by producing Type A souvenirs 540 5 and 2(223+ *). 3 Type B souvenirs, where -225 1x ** $ 150 X X" seems to be incomplete and unclear. The specific production quantities and profit cannot be determined without knowing the value of k.

(c) To find the shadow price for Resource 2 (associated with constraint 2), we can perform sensitivity analysis.

The shadow price represents the change in the objective function's value per unit increase in the availability of Resource 2 (Machine II in this case). We can determine it by evaluating the sensitivity of the objective function to changes in the constraint.

Since the constraint is x + 3y ≤ (300 + k), the shadow price associated with Resource 2 is the coefficient of the Machine II term, which is 3.

Therefore, the shadow price for Resource 2 (associated with constraint 2) is $3 per minute.

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\(\longrightarrow \textsf{D. A bicycle sitting on the ground} \)

Let us check all options -

Without the specific figure or image provided, it is not possible to determine the gravitational moments at the ankle, knee, hip, lumbar spine, and cervical spine accurately.

Gravitational moments depend on the individual's body position, weight distribution, and alignment, which cannot be assessed without visual information. Gravitational moments can be calculated by multiplying the weight of a body segment or joint by the perpendicular distance between the line of gravity and the joint or segment. However, these distances vary based on the body's posture, alignment, and individual characteristics. This analysis typically involves capturing data through motion capture systems, force plates, or other specialized equipment to measure joint angles, segment positions, and forces acting on the body. With these measurements, biomechanical software can calculate the gravitational moments at each joint or segment.

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