An inclined plane of length 12m is used to pull a load of 3000N to height of 3m by applying an effort of 1000N. Calculate its MA, VR and efficiency. Also, find the work done in the machine

Answer: decreases

Explanation: As frequency increases the period of a wave decreases because they have an inverse relationship. The equation for wave period (T) is the inverse of the frequency (f). So, as frequency increases, the value for period will decrease accordingly.

Answer:

A: The kinetic energy of the two vehicles is transferred to potential energy when it stops.

B: The more mass an object has the more kinetic energy it will have.

Explanation:

This may be the right answer for your question but if it isn't my bad.

(a) The period of a wheel can be found by dividing the time it takes for each revolution by the number of revolutions per period.

(b) The angular speed of the wheel in rad/s can be determined by dividing 2π (the full angle in radians) by the period.

(a) To find the period of the wheel, we divide the time it takes for each revolution (2.25 s) by the number of revolutions per period. Since the wheel completes one revolution per period, the period is equal to the time per revolution. Therefore, the period of the wheel is 2.25 s.

(b) The angular speed of the wheel can be calculated by dividing the full angle in radians (2π) by the period. Since the wheel completes one revolution per period, the angle traversed is 2π radians. Dividing 2π by the period of 2.25 s gives us the angular speed of the wheel in rad/s. Thus, the angular speed of the wheel is approximately 2.79 rad/s.

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This refers to an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. the buoyant force is also known as upthrust. It operates under Archimedes' principle.

The formula for calculating  buoyant force:

Fb = -ρ g V

Where,

Fb = buoyant force

ρ = fluid density

g = acceleration due to gravity

V = fluid volume

From the question:

V = 69.6 l

m = 72.8 kg

g = 9.8m/s

To calculate density, ρ:

ρ = Mass/Volume

ρ = 72.8 kg/69.6 l

ρ = 1.05kg/l

To calculate buoyant force, Fb:

Fb = -ρ g V

Fb = -1.05kg/l * 9.8m/s * 69.6 l

Fb = -716.2 N

Note: Negative buoyancy suggests that the immersed object is denser than the fluid displaced which results in the sinking of the object. Neutral buoyancy takes place when the weight of the immersed object is equivalent to the fluid displaced. The dive taken by the scuba diver is a perfect example of neutral buoyancy.

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The LEDs that make up the colors on some TV screens are typically red, blue, and green (option D). These three primary colors are combined in various intensities to create a wide range of colors on the screen.

The combination of red, blue, and green LEDs is commonly used in TV screens because these colors are the primary additive colors of light. This means that by varying the intensity of these three colors, it is possible to create a wide spectrum of colors. This principle is known as additive color mixing.

Red, blue, and green are chosen as the primary colors because they correspond to the three types of cones in the human eye that are most sensitive to different wavelengths of light. By stimulating these cones with the appropriate intensities of red, blue, and green light, the brain perceives a full range of colors.

The combination of red and green light creates yellow, while blue and green light combine to form cyan. However, magenta is not one of the primary colors in this system. Instead, magenta is created by combining blue and red light. Therefore, option B (magenta, cyan, yellow) is not the correct combination of LEDs used in TV screens.

In conclusion, option D (red, blue, green) represents the LEDs commonly used in TV screens to generate a wide range of colors through additive color mixing.

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Answer:

The power used by the light powered by a 16.4 V battery when the current is 5.84 Amps is 95.456 Watts.

Answer:

ya daddy is my zaddy

Explanation:

I) Tension in the spring = 2N

ii) Angular speed of the bung=5 rads-¹

iii) The time(T) it takes to make one complete revolution=1.256 seconds

Formula used to calculate the time(T) it takes to make one complete revolution = 2π √(l/g)

l = radius= 40cm = 0.4m

g = acceleration due to gravity = 10m/s-²

π =3.14( constant)

T = 2× 3.14 × √0.4/10

T = 6.28 ×√0.04

T = 6.28 × 0.2

T= 1.256 seconds

Formula to calculate angular speed(w)= 2π/T

where T= 1.256 secs

Therefore w = 2×3.14/1.256

w = 6.28/ 1.256

w = 5 rads-¹

Formula to calculate Tension in the spring(F)

= mrw²

where m= 200 g = 0.2kg

r = radius= 40cm = 0.4m

w = angular speed = 5 rads-¹

Therefore F = 0.2 × 0.4 × 5²

= 0.08 ×25

= 2N

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A hot air balloon is 100 feet above the ground when a motorcycle (traveling in a straight line on a horizontal road) passes directly beneath it going 45 miles/hour.

Given that, The altitude of the balloon from the ground = 100 feet The velocity of the motorcycle = 45 miles/hour = 66 feet/second Rate of ascending of the balloon = 10 feet/second Now, When the motorcycle passed the balloon, both of them are on the same line passing through the ground.

Let the length of the balloon be L. The time taken for the balloon to move L distance = L / Rate of ascent of balloon L = 0 because it is already in sight. Hence, the motorcycle driver has to travel for no time before the balloon is out of sight.

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Answer:

40 degrees Celsius

Explanation:

Have a great summer :)

A football workout involves two linemen who are pushing on the coach and the sled. The sled and the coach's combined mass is 300 kg, while the coefficient of friction between the sled and the grass is .800. The sled accelerates at a rate of .580 m/s/s. We need to determine the force applied to the sled by the linemen.

The total force acting on the sled is:Force = Mass × AccelerationF = 300 kg × .580 m/s/s = 174 NSince the sled and the grass's coefficient of friction are known, we can determine the force applied to the sled by the linemen using the following equation:

Frictional Force = Coefficient of Friction × Normal Force

The normal force is equal to the weight of the sled and the coach. Thus,Normal Force = Mass × GravityN = 300 kg × 9.81 m/s/s = 2943 NFrictional Force = .800 × 2943 N = 2354.4 NThe force applied to the sled by the linemen is the difference between the total force acting on the sled and the frictional force.

Force Applied by Linemen = Total Force − Frictional ForceF = 174 N − 2354.4 N = −2180.4 NThe linemen are exerting a force of −2180.4 N on the sled in the opposite direction to the sled's movement. This is because the frictional force is greater than the total force acting on the sled.

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Answer:

an electron with element with large number of valence electron and large atomic radius

Answer:

an element with a small number of valence electrons and a large atomic radius

Explanation:

The correct statement regarding a short circuit is that it is an accidental low-resistance connection in a circuit, typically when the power is connected directly to ground.

A short circuit occurs when current flows through an unintended path with low resistance, bypassing the normal load.

This can cause excessive current flow, overheating, and potential damage to the circuit or even start a fire.

It is important to note that a short circuit can be dangerous and should be addressed immediately to prevent any harm.

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True. When you learn something new neurons make connections and retain that knowledge. That means the more you learn a skill the more connections you make and the more muscle memory you get from doing that skill. Thus you get better at that skill.

Answer:

true

Explanation:

The rate οf change οf temperature with respect tο time is apprοximately -0.4223 K/min.

Tο find the rate οf change οf temperature (T) with respect tο time (t) at a certain instant, we can use the ideal gas law equatiοn PV = nRT and differentiate it with respect tο time:

PV = nRT

Taking the derivative with respect tο time:

P(dV/dt) + V(dP/dt) = nR(dT/dt)

Since we are interested in finding dT/dt, we can rearrange the equatiοn:

(dT/dt) = (P(dV/dt) + V(dP/dt)) / (nR)

Substituting the given values:

P = 7.0 atm

dV/dt = -0.17 L/min (negative sign indicates a decrease in vοlume)

dP/dt = 0.11 atm/min

n = 10 mοl

R = 0.0621 L·atm/(mοl·K)

(dT/dt) = (7.0 atm * (-0.17 L/min) + 12 L * 0.11 atm/min) / (10 mοl * 0.0621 L·atm/(mοl·K))

Calculating the rate οf change οf temperature:

(dT/dt) ≈ -0.4223 K/min

Therefοre, at that instant, the rate οf change οf temperature with respect tο time is apprοximately -0.4223 K/min.

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We have that for the Questions

a the gravitational potential energy at a relative to B

b. the particle's kinetic energy at B

c the particle's speed at B

d. the potential energy and kinetic energy at C

it can be said that

a)P.E=0.63210Js

b)K.E=0.63210J

c)v=2.420m/s

d)K.E=0.5mv^2

P.E=mgh

From the question we are told

215 g particle is released from rest at point A inside a smooth hemispherical bowl of radius 30.0 cm, as shown at right

a)

Generally the equation for the  gravitational potential energy   is mathematically given as

P.E=mgh

P.E=0.215x9.8 x 0.3

P.E=0.63210J

b)

Generally the equation for the   kinetic energy  is mathematically given as

K.E=0.5mv^2

Where

P.E=K.E at point B

Therefore

K.E=0.63J

c)

Generally the equation for the  speed   is mathematically given as

\(v=\sqrt{\frac{0.63}{0.5m}}\)

v=2.420m/s

d)

The potential energy and kinetic energy at C

Will be given by the equation

K.E=0.5mv^2

P.E=mgh

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Explanation:

It doesn't depends upon other.

It have it's own identity.

It's a lot easier to measure temperature than to measure the motion of component particles.

Answer:

C . 3.75 Ohms

Explanation:

V = IR

R = V / I

From the graph, you pick a value for potential difference and find its corresponding current.

The resistance of the wire in Ohms is 3.75 Ω, therefore the correct answer is option C

Resistance is the obstruction of electrons in an electrically conducting material.

The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law.

V=IR

where V is the voltage

I is the current

From the voltage-current  graph, one can know the resistance by calculating the slope of the graph

As shown in the graph the variation of the voltage with the current

Y axis represents the voltage and the X axis represents the current

slope = variation in the Y coordinate /variation in the X coordinate

resistance = variation in the voltage /variation in the current

                 = (30 - 0 )/ (8-0 )

                 = 3.75 Ω

Thus, by observation and calculation from the graph, the resistance of the wire comes out to be 3.75 Ω

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Answer: Periods

Explanation: The rows are called Periods

The columns are Groups

Periodic table

The rate of heat flow through the wall is 23.71 W/m². To find the rate of heat flow through the wall, we need to calculate the thermal resistance of each layer and add them together. Then, we can use the formula for heat transfer through a composite wall to find the rate of heat flow.

First, we need to find the thermal resistance of the wood layer. Thermal resistance (R) is equal to thickness (d) divided by thermal conductivity (k). So, for the wood layer:

R = 0.03 m / 0.08 W/(m · K) = 0.375 m²K/W

Next, we need to find the thermal resistance of the foam layer:

R = 0.022 m / 0.01 W/(m · K) = 2.2 m²K/W

Now, we can add the thermal resistances of the two layers together:

Rtotal = Rwood + Rfoam = 0.375 m²K/W + 2.2 m²K/W = 2.575 m²K/W

Finally, we can use the formula for heat transfer through a composite wall:

Q = (T1 - T2) / Rtotal

where Q is the rate of heat flow, T1 is the temperature on one side of the wall, T2 is the temperature on the other side of the wall, and Rtotal is the total thermal resistance of the wall.

Plugging in the values we have:

Q = (-10°C - 19°C) / 2.575 m²K/W = -29°C / 2.575 m²K/W = -11.27 W/m²

Note that the rate of heat flow is negative, indicating that heat is flowing from the inside of the house to the outside, as expected. To get the absolute value of the rate of heat flow, we can take the magnitude of the negative value:

|Q| = 11.27 W/m²

Therefore, the rate of heat flow through the wall is 23.71 W/m².

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This setup cannot power the device because the voltage from the two 1.5 volt batteries is only 3 volts, which is not enough to power the device that requires 9 volts.

Even after stepping up the voltage using the 1:3 transformer, the output voltage would only be 9 volts if the input voltage is 3 volts, but the transformer cannot create energy, so the power output will be lower than the input power, leading to a lower voltage than needed. Additionally, the two 1.5 volt batteries may not be able to supply enough current to the device, leading to a lower power output and possible damage to the device. Therefore, this setup will not work to power the device.

In this case, even with the step-up transformer, the voltage is still not high enough to power the device. Additionally, the current supplied by the batteries may not be sufficient to meet the device's power requirements, which can cause the device to malfunction or not work at all. Finally, connecting batteries in series can be dangerous if they are not matched properly, as it can lead to overloading and possible overheating or explosion of the batteries.

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After calculations of induced current formula and Lenz's law, the magnitude of the current induced in the loop is 0.2496 A and its direction is from left to right.

Given data, Mass of metal rod (m) = 0.22 kg Distance between rails (d) = 0.52 m Resistance of the resistor (R) = 3.0Ω Speed of metal rod (v) = 1.8 m/s Coefficient of kinetic friction (μ) = 0.20 Magnetic field (B) = 0.80 T

Formula used to find induced current is:  E = Blv

Where, E is the induced emf in the rod, B is the magnetic field strength, l is the length of the rod and v is the velocity of the rod.

As per Faraday's law of electromagnetic induction, the emf induced in the loop of the rod, rails and resistor is equal to the rate of change of magnetic flux enclosed by the loop. The current induced in the loop is:  I = E / R

From the question, Velocity of metal rod, v = 1.8 m/s Magnetic field, B = 0.80 T Distance between rails, d = 0.52 m Length of rod, l = d

Induced emf in the loop is: E = Blv= 0.8 * 0.52 * 1.8= 0.7488 V

The direction of the induced emf is given by Lenz's law. Lenz's law states that the direction of the induced emf is such that it opposes the cause that produces it. Here, the cause that produces the induced emf is the relative motion between the rod and the magnetic field.

Hence, the induced emf in the loop will generate a current such that its magnetic field opposes the external magnetic field of the magnet. In this case, the magnetic field is towards the top. Thus, the direction of the induced current will be from left to right.

Thus, the current induced in the loop is: I = E / R= 0.7488 / 3= 0.2496 A

The magnitude of the current induced in the loop is 0.2496 A and its direction is from left to right.

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saitama is the strongest

No, magnetic fields do not exist on every planet. The magnetic fields of the four gas giants are extremely strong, while those of the Earth and Mercury are fairly strong and Venus and Mars have essentially no detectable magnetic fields.

Mars and Venus don't have much of a magnetic field, according to probes. The magnetic fields of Jupiter, Saturn, Uranus, and Neptune are all far stronger than those of the Earth. Jupiter is the winner since it has the biggest magnetic field. The magnetosphere grows in size as the magnetic field gets stronger. Jupiter's magnetic field, which is around 20,000 times stronger than Earth's magnetic field, generates a magnetosphere that extends over 3 million kilometers from Jupiter before it starts to deflect solar wind.

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Pasteurization - Heat applied to beverages to prevent spoilage and kill pathogens. Protocols include holding liquids at 71.6°C for 15 seconds or at 63°C for 30 minutes. Does not sterilize, Boiling water - To disinfect but will not sterilize.

Steam under pressure - Requires use of an autoclave. To sterilize, temperature must reach 121°C for a minimum of 15 minutes. Pasteurization is a heat treatment process that is used to kill harmful microorganisms and extend the shelf life of perishable food and beverage products. pasteurization involves heating the product to a specific temperature for a set amount of time and then rapidly cooling it. The temperature and duration of pasteurization depend on the type of product and the pathogens that need to be eliminated. Common pasteurization methods include high-temperature short-time (HTST) and low-temperature long-time (LTLT) pasteurization. HTST pasteurizes products quickly at high temperatures, while LTLT pasteurizes products at lower temperatures over a longer period of time.

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Answer:

When conducting electricity, the electrons inside the material move from a higher potential to a lower potential. The conductance of a component can also be defined as the current generated per unit voltage difference. The conductance is a property of the object whereas electrical conductivity is a property of the material.

Explanation:

Answer:

5.2 s

Explanation:

From the question given above, the following data were obtained:

Velocity = 7.5 m/s

Displacement = 39 m up

Time =?

The time taken for the cable cab to get to 39 m can be obtained as follow:

Velocity = Displacement / Time

7.5 = 39 / time

Cross multiply

7.5 × time = 39

Divide both side by 7.5

Time = 39 / 7.5

Time = 5.2 s

Thus, the time taken for the cable cab to get to 39 m up is 5.2 s

Answer:

D

Explanation:

light moves in a straight line (sorry if I'm wrong)

If a  student wants to draw a diagram to show the path of a light wave would be an arrow starting at the wave source and pointing away from it , therefore the correct answer is option D.

Science is the methodical, empirically-based pursuit and application of knowledge and understanding of the natural and social worlds.

A method of learning about the world is science. Science allows people to participate in the creation of new knowledge as well as use that knowledge to further their goals.

If a  student wants to draw a diagram to show the path of a light wave would be an arrow starting at the wave source and pointing away from it, therefore the correct answer is option D.

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