A screw jack, 25% efficient and having a screw of pitch 0.4cm is used to raise a load through a certain height. If in the process the handle turns through a circle of radius 40cm, calculate the (i) Velocity ratio of the machine. (ii) The Mechanical advantage of the machine. (iii) Effort required to raise a load of 1000N with the machine. (take = 3.14)​

The moon pulls each kilogram with water in the Kamali River with a force of 5.19 x 10-5 N, or strength or energy used or brought to bear.

The term "force" has a clear definition in science. It is quite acceptable to refer to a force of this level as a push or perhaps a pull. An object does not "have in it" or "contain" a force. One thing is subject to a force from another. There is no distinction between living and non-living things in the concept of a force.

r3 = 105 kilometers x 10 m 3 x 108m

1 kmF=G.M.mp2

6.67 x 10-11 N kg 2. m2 X 7 × 1022 kg X 1 kg\s(3 x 108 m) (3 x 108 m) 2\s5.19 x 10-5 N

A push that has the potential to accelerate something is called a force. A physical push could be used to move a large furniture item around a room. It might be less concrete, like depressing a gas pedal in such a car. J

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Answer:2.24

Explanation:

Trust

Galileo Galilei astronomer designed scientific instruments, including a new kind of thermometer, an improved compass, and a more powerful telescope.

Study on planets, asteroids, and other celestial bodies is done by astronomers. They use both space- and ground-based technologies, including as telescopes like the Space Telescope Hubble. Some astronomers study distant galaxies as well as things such as pulsars and black holes.

Astronomy, atmospheric science, physics, and astrobiology, the study of space biology, are some of the scientific fields that are the most likely to lead to employment at Space agency. NASA uses 15 different types of scientists, demonstrating the significance of scientists from all specialities in space exploration.

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Answer:

what's the question?........

Explanation:

We know,

100 cm= 1 m

1 cm= 1/100 m

82 cm= (1/100)×82 m

82 cm= 0.82 m

Answer:

The right answer is Democritus

Explanation:

He experienced bonding with his father which strongly resulted his interest in science and to the study of the atoms ;)

Your welcome

Democritus created the first atomic model. Democritus's experiences with his father also led to his interest in science and to the study of the atom. The atom in Democritus' model is an inert solid that interacts with other atoms mechanically. yes its me Ari

Answer:

57600 m and hour

Explanation:

Answer:

correct statement should be the same speed.

Explanation:

if the car is moving east reads 60 mph and it passes another car with the same speed.

therefore, the magnitudes of their velocities are equal.

and each car's velocity is the negative of the other car vehicle.

so the correct statement should be the same speed.

Answer:

They have different velocities

Explanation:

The cars are passing each other at the same speed, and because velocity is speed with direction they are at different velocities.

Answer:

2m/s

Explanation:

speed = distance÷time

speed =90÷45=2m/s

Answer:

0.45  [m/s²].

Explanation:

1) formula of the required acceleration is (V-final velocity, V₀-initial velocity, t-elapsed time):

\(a=\frac{V-V_0}{t};\)

2) according to the formula above:

a=(12-3)/20=0.45 [m/s²].

Answer:

सं देश भर भर में नौ महिना अघिदेखि महिना अघिदेखि नै जातीय आधारमा प्रान्त पुगें र नेपाली जनताको लागि फरक छ तर त्यो पनि पाँचै वर्षमा धरासायी भयो पाँचै वर्षमा धरासायी भयो भने हेर्न त्यो पनि हो र स्वार्थी हुन्छ भन्थे यो मेरो पहिलो मृत्यु भएको हो। छ। यो म भने त्यो प्रेम कति

Harrison is incorrect because particles can force each other to vibrate more easily in elastic materials where particles are closer together. So, option A.

Vibration is a periodic back-and-forth motion of the particles in an elastic body or medium.

Here,

Vibrations occurs when practically any physical system is moved out of its equilibrium condition and is left to react to forces that work to bring it back into equilibrium.

A periodic shift in time is referred to as a vibration. A wave is a regular oscillation in both space and time. The waves propagate from one point to another in a medium.

Most waves travel through different media, and this affects how fast they move.

In general, waves go through solids the quickest and gases the slowest. The reason for this is that while particles in a gas are farthest to one another, those in a solid are closer to one another.

Hence,

Harrison is incorrect because particles can force each other to vibrate more easily in elastic materials where particles are closer together. So, option A.

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The ball is moving at approximately 0.29 m/s after being released from the spring. Rounded to two decimal places, the final answer is 0.29 m/s

The potential energy stored in the compressed spring is given by:

\(U = (1/2) * k * x^2\)

where k is the spring constant, x is the compression distance, and U is the potential energy.

In this case, k = 26 N/m and x = 0.12 m. Substituting these values into the above equation, we get:

\(U = (1/2) * (26 N/m) * (0.12 m)^2U = 0.045 N*m = 0.045 J\)

The potential energy stored in the spring is converted into kinetic energy when the ball is released. The kinetic energy of an object with mass m moving at velocity v is given by:

At the instant of release, all the potential energy is converted to kinetic energy. Therefore, we can equate the two energies and solve for v:

K = U

\((1/2) * m * v^2 = 0.045 Jv^2 = (2 * 0.045 J) / mv^2 = (2 * 0.045 J) / 0.52 kgv^2 = 0.0865 m^2/s^2\)

Taking the square root of both sides gives us:

V= 0.294 m/s

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Answer:22kg

Explanation:

from F=ma, 88=4m, m=22kg

This transformer is a step-down transformer as the voltage on the secondary coil is lower than the voltage on the primary coil. A step-down transformer is used to decrease the voltage level, while a step-up transformer increases the voltage level.

The voltage generated by the transformer can be calculated using the formula V1/V2 = N1/N2, where V1 is the voltage on the primary coil, V2 is the voltage on the secondary coil, N1 is the number of turns on the primary coil and N2 is the number of turns on the secondary coil. In this case, V1 is 220 volts, N1 is 180 turns and N2 is 100 turns. Therefore, the voltage on the secondary coil can be calculated as follows:

220/V2 = 180/100

V2 = (100 x 220) / 180

V2 = 122.22 volts

So, the voltage generated by the transformer is 122.22 volts.

Based on the given information, this transformer is a step-down transformer as the voltage on the secondary coil is lower than the voltage on the primary coil. A step-down transformer is used to decrease the voltage level, while a step-up transformer increases the voltage level.

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Answer:

the answer should be field.

The effect of friction on air: B. is relevant only within the planetary boundary layer.

In Science, there are different types of force that acts on a physical object and these include the following:

Frictional force can be defined as a type of force that resists and slows the relative motion of two physical objects when there surfaces come in contact. This ultimately implies that, a frictional force prevents two surfaces from easily sliding over or slipping across one another.

Based on scientific research and experiments, we can reasonably infer that the effect of friction on air is relevant and important only within the planetary boundary layer.

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Complete Question:

The effect of friction on air:

A. increases wind speed.

B. is relevant only within the planetary boundary layer.

C. causes airflow to cross isobars rather than run parallel to them.

D. increases the Coriolis force. E. increases with height.

Answer:

The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object

Answer:

It’s actually A) Inversely

Explanation:

The plane mirrors and convex mirrors form only virtual images because reflected rays appear to come from behind the mirror.

In plane mirrors, the surface is totally  flat, making light rays to reflect off the surface at the same angle at which they hit it. The reflected rays appear to come from behind the mirror, making a virtual image.

The image created by a plane mirror is of the same size as the object and appears to be situated behind the mirror.

Likewise, convex mirrors have a curved outward surface. When light rays hit a convex mirror, they diverge after reflection. This divergence makes the reflected rays to appear to come from behind the mirror as well, that results in the formation of a virtual image.

Convex mirrors have a vast field of view due to the divergence of the reflected rays, that allows them them to show a wider angle of view compared to flat or concave mirrors.

Hence, the right answer is option b: because reflected rays appear to come from behind the mirror.

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Answer:

the correct answer is

Explanation:

The small intestine absorbs most of the nutrients in your food,and your circulatory system passes them on to other parts of your body to store or use. Special cells helped absorbed nutrients cross the intestinal lining into your blood stream.

hope this works out!!!!

Star b must be 2 light years away. The apparent brightness of a star decreases with the square of the distance. Since star a appears 1/16 as bright as star b, star b must be √16 = 4 times closer, which is 2 light years away.

The apparent brightness of a star is determined by its intrinsic brightness, also known as its absolute magnitude, and its distance from the observer. In this scenario, star a and star b have the same absolute magnitude, indicating that they have the same inherent brightness. However, star a appears 1/16 as bright as star b. Since apparent brightness is inversely proportional to the square of the distance, we can deduce that star b must be 1/4 times the distance of star a to maintain the same apparent brightness. Given that star a is 4 light years away, star b must be 2 light years away. This ensures that the apparent brightness of star b is 1/16 of star a, as observed.

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The linear momentum of an object can be calculated using the formula:

Linear Momentum = Mass × Velocity

In this case, we are given the mass of the object as 2 kg. However, we are not directly given the velocity of the object. Instead, we are given the kinetic energy of the object, which can be related to its velocity.

The formula for kinetic energy is:

Kinetic Energy = 0.5 × Mass × \(Velocity^2\)

Given that the kinetic energy is 10 J and the mass is 2 kg, we can rearrange the formula to solve for the velocity:

10 J = 0.5 × 2 kg × \(Velocity^2\)

Dividing both sides of the equation by 1 kg and multiplying by 2, we get:

20 = \(Velocity^2\)

Taking the square root of both sides, we find:

Velocity ≈ √20 ≈ 4.47 m/s

Now that we know the velocity of the object, we can calculate its linear momentum using the formula:

Linear Momentum = Mass × Velocity

Linear Momentum = 2 kg × 4.47 m/s

Linear Momentum ≈ 8.94 kg·m/s

Therefore, the linear momentum of the 2-kg object is approximately 8.94 kg·m/s.

Linear momentum is a vector quantity and represents the quantity of motion of an object. It depends on the mass of the object and its velocity. In this case, the kinetic energy is used to determine the velocity of the object, which is then used to calculate the linear momentum.

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Answer:

for resistors in series, add the resistances to get their equivalence. The answer is

80.0 Ohms

Answer: Yes I am alive.

Answer:

C. all of the above.

Explanation:

up at the top it says solar power bank.

in the boxes below it says LED flashlight and solar energy.

it is all of the above.

The answer to the question, "What is something that you use almost every day that is a polymer?" is:D) plastic
Plastic is the most common example of a polymer that we use daily in various forms, such as bags, bottles, and containers.

Polymers are materials made up of repeating units or monomers, and plastic is one of the most common types of polymers used in everyday life. Plastic can be found in items such as water bottles, food containers, and packaging materials. It is a versatile material that can be molded into various shapes and forms, making it a popular choice for many applications.

Plastic is a polymer, which means it's composed of long chains of molecules. Other options are incorrect because:

A) Metal is not a polymer; it's an element or an alloy of different elements.
B) Gas is a state of matter and not a polymer.
C) Water is a compound  and not a polymer.
E) Wood is a natural material mainly composed of cellulose, which is a natural polymer, but it is not a primary example of a polymer when compared to plastic.

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The puck’s position and velocity as a function of time is:

1. Victor's puck will travel a distance of (v0²)/(2g(μ + tan(θ))) up the ramp before coming to a stop.

2. Lilly's puck will travel a distance of (v0²)/(2g(μ + tan(π/3 - ωt))) along the ramp by the time the incline reaches π/3 radians.

3. Evelyn's puck will travel a distance of ∫(v0/c)dv from the bottom of the ramp to its maximum height and the time required to reach the maximum height is ∫(1/v0)(1/√(1 - (cv²/v0²)))dv.

1. For Victor's puck, the work done against friction is equal to the change in gravitational potential energy. Using the work-energy principle, we can derive an expression for the distance traveled up the ramp before coming to a stop.

To calculate the distance traveled up the ramp in Victor's experiment, we use the work-energy principle, which states that the work done on an object is equal to the change in its kinetic energy. In this case, the work done against friction is equal to the change in gravitational potential energy, which allows us to relate the distance traveled to the initial velocity and the coefficient of kinetic friction.

2. For Lilly's puck, the inclination of the ramp is changing over time. To determine the distance traveled along the ramp, we need to integrate the velocity of the puck with respect to time over the given range of incline.

For Lilly's experiment, the increasing inclination of the ramp adds a time-dependent component to the problem. To determine the distance traveled along the ramp, we need to integrate the velocity of the puck with respect to time. Since the inclination is changing at a constant rate, we can express it as a function of time and use this in the integration.

3. For Evelyn's puck, the force exerted by the ramp is given by F(v) = -cv². By setting this force equal to the weight of the puck, we can derive an expression for the velocity as a function of position. Integrating this expression will give us the distance traveled and the time taken to reach the maximum height.

In Evelyn's experiment, the force exerted by the ramp is different from the usual force of friction. Instead, it follows the equation F(v) = -cv². By equating this force to the weight of the puck, we can derive an expression for the velocity as a function of position. Integrating this equation allows us to determine the distance traveled up the ramp and the time taken to reach the maximum height.

When the puck slides up the ramp, two main forces act upon it: the force of gravity pulling it downwards and the frictional force opposing its motion. The net force acting on the puck determines its acceleration. In order for the puck to come to a stop, the net force must be equal to zero.

The net force can be calculated by considering the components of the forces acting on the puck along the ramp and perpendicular to the ramp. The force of gravity can be split into two components: one parallel to the ramp (mg sin(θ)) and one perpendicular to the ramp (mg cos(θ)), where m is the mass of the puck and θ is the angle of inclination of the ramp.

The frictional force can be calculated as the product of the coefficient of kinetic friction (μ) and the normal force exerted on the puck by the ramp (mg cos(θ)). However, since the puck is moving up the ramp, the frictional force acts in the opposite direction to the puck's motion. Therefore, the frictional force is -μmg cos(θ).

Setting up the net force equation, we have Fnet = μmg cos(θ) - mg sin(θ). Since the puck comes to a stop, Fnet must be equal to zero.

Solving the net force equation for θ, we get μ = tan(θ). Using trigonometric identities, sin(θ) = μ/√(1 + μ ²) and cos(θ) = 1/√(1 + μ ²), we can rewrite the net force equation as Fnet = μmg(μ/√(1 + μ ²)) - mg/√(1 + μ ²). Simplifying further, we have Fnet = (μ ²mg - mg)/(√(1 + μ ²)).

Since Fnet = 0, we have μ ²mg - mg = 0, which gives μ ² - 1 = 0. Solving for μ, we find μ = 1. This means that the coefficient of kinetic friction must be equal to 1 in order for the puck to come to a stop on the ramp.

Using the equation for distance traveled up the ramp, d = (v0 ²)/(2gμ), we can calculate the distance the puck travels before coming to a stop. This equation assumes that the initial velocity (v0) is sufficient to overcome the frictional force and reach a height where the net force becomes zero.

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Answer:

1, 2, and 3

Explanation:

The heat of the solar radiation is absorbed by the atmosphere then the atmosphere re-releases heat, warming Earth’s surface and lower atmosphere. Therefore, option (3), (4) are correct.

The greenhouse effect can be described as a process that happens when energy heats the planet's surface, but greenhouse gases in the atmosphere stop some of the heat from returning directly to space and warm the planet.

The natural greenhouse effect keeps the earth from having the below-freezing temperature that it would freeze if there were no greenhouse gases. Additionally, human activities increase greenhouse gases and trap greater amounts of heat, which cause the Earth to grow warmer over time.

The Sun sends most of its energy as visible and near-infrared light, while Earth's average surface temperature emits longer-wavelength infrared, radiant heat. These greenhouse gases emit radiant heat in all directions, passing heat to the air and warming other greenhouse gases.

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