how much work is required to lift a 360 kilogram piano to a window whose height is 10 m from the ground

To begin, change the rotational speed () to rev/sec: 13/20 revs per second is equal to 39 revs per minute multiplied by 1 minute and 60 seconds.

The equation is then updated with all the values: = rw^2/g\s

=(0.230*13/20)/9.8

=0.015255

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Answer:

helium, hydrogen, nitrogen, oxygen,iron,uranium,

Explanation:

there are 118 elements but here are some

The answer is 2 because the Hydrogen atom on the right needs 2 to balance with the one on the left

Answer:

Range of the projectile: approximately [tex]1.06 \times 10^{3}\; {\rm m}[/tex].

Maximum height of the projectile: approximately [tex]80\; {\rm m}[/tex] (approximately [tex]45.0\; {\rm m}[/tex] above the top of the cliff.)

The projectile was in the air for approximately [tex]7.07\; {\rm s}[/tex].

The speed of the projectile would be approximately [tex]155\; {\rm m \cdot s^{-1}}[/tex] right before landing.

(Assumptions: drag is negligible, and that [tex]g = 9.81\; {\rm m\cdot s^{-1}}[/tex].)

Explanation:

If drag is negligible, the vertical acceleration of this projectile will be constantly [tex]a_{y} = (-g) = (-9.81)\; {\rm m\cdot s^{-2}}[/tex]. The SUVAT equations will apply.

Let [tex]\theta[/tex] denote the initial angle of elevation of this projectile.

Initial velocity of the projectile:

Final vertical displacement of the projectile: [tex]x_{y} = (-35)\; {\rm m}[/tex] (the projectile landed [tex]35\: {\rm m}[/tex] below the top of the cliff.)

Apply the SUVAT equation [tex]v^{2} - u^{2} = 2\, a\, x[/tex] to find the final vertical velocity [tex]v_{y}[/tex] of this projectile:

[tex]{v_{y}}^{2} - {u_{y}}^{2} = 2\, a_{y}\, x_{y}[/tex].

[tex]\begin{aligned} v_{y} &= -\sqrt{{u_{y}}^{2} + 2\, a_{y} \, x_{y}} \\ &= -\sqrt{(29.71786)^{2} + 2\, (-9.81)\, (-35)} \\ &\approx (-39.621)\; {\rm m\cdot s^{-1}}\end{aligned}[/tex].

(Negative since the projectile will be travelling downward towards the ground.)

Since drag is negligible, the horizontal velocity of this projectile will be a constant value. Thus, the final horizontal velocity of this projectile will be equal to the initial horizontal velocity: [tex]v_{x} = u_{x}[/tex].

The overall final velocity of this projectile will be:

[tex]\begin{aligned}v &= \sqrt{(v_{x})^{2} + (v_{y})^{2}} \\ &= \sqrt{(150.086)^{2} + (-39.621)^{2}} \\ &\approx 155\; {\rm m\cdot s^{-1}} \end{aligned}[/tex].

Change in the vertical component of the velocity of this projectile:

[tex]\begin{aligned} \Delta v_{y} &= v_{y} - u_{y} \\ &\approx (-39.621) - 29.71786 \\ &\approx 69.3386 \end{aligned}[/tex].

Divide the change in velocity by acceleration (rate of change in velocity) to find the time required to achieve such change:

[tex]\begin{aligned}t &= \frac{\Delta v_{y}}{a_{y}} \\ &\approx \frac{69.3386}{(-9.81)} \\ &\approx 7.0682\; {\rm s}\end{aligned}[/tex].

Hence, the projectile would be in the air for approximately [tex]7.07\; {\rm s}[/tex].

Also the horizontal velocity of this projectile is [tex]u_{x} \approx 150.086\; {\rm m\cdot s^{-1}}[/tex] throughout the flight, the range of this projectile will be:

[tex]\begin{aligned}x_{x} &= u_{x}\, t \\ &\approx (150.086)\, (7.0682) \\ &\approx 1.06 \times 10^{3}\; {\rm m} \end{aligned}[/tex].

When this projectile is at maximum height, its vertical velocity will be [tex]0[/tex]. Apply the SUVAT equation [tex]v^{2} - u^{2} = 2\, a\, x[/tex] to find the maximum height of the projectile (relative to the top of the [tex]35\; {\rm m}[/tex] cliff.)

[tex]\begin{aligned}x &= \frac{{v_{y}}^{2} - {u_{y}}^{2}}{2\, a} \\ &\approx \frac{0^{2} - 29.71786^{2}}{2\, (-9.81)} \\ &\approx 45.0\; {\rm m}\end{aligned}[/tex].

Thus, the maximum height of the projectile relative to the ground will be approximately [tex]45.0\; {\rm m} + 35\; {\rm m} = 80\; {\rm m}[/tex].

The ratio of the greatest static friction force (F) between the surfaces in contact before movement starts to the normal force (N) is known as the coefficient of static friction.

Create an inclination plane out of one of the materials, then place a body made of the other material on it to determine the minimum coefficient of static friction between the two. Up until the body begins to slide, steepen the incline. The coefficient of friction is the angle's tangent.

A body of mass m experiences both a horizontal and a vertical component of gravity when you increase the incline.

Applying Newton's Law to each of them right before the body begins to move reveals that Fx = max is the value for the horizontal component, which acts in the x-direction.

The same holds true for the y-axis: Fy = may.

F on one side and umg on the other will exert forces on the body of mass "m."

Write the formula as F-umg=ma.

In the direction F is acting, the force on mass "2m" will be umg. (Observe how the frictional force acts on mass "m" on the left side and mass "2m" on the opposite side.)

Formula: umg=2ma

The acceleration of both bodies should be the same for a no-slip condition; to find the solution, simply substitute the acceleration from equation (2) into number 1.

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This means that potassium hydroxide is a Compound. Option A.

Water is formed from the chemical combination of hydrogen and oxygen. A water molecule is a chemical bond of two hydrogen atoms and one oxygen atom. Hydrogen polyoxides, also called oxidants oxyhydrogen or explosive gases, are composed only of hydrogen and oxygen atoms, joined only by single bonds, are saturated and acyclic, and have a molecular structure containing no rings or loops increase.

Hydrogen is an element consisting of a group of hydrogen atoms, and oxygen is an element consisting of oxygen atoms. But water is a compound of water molecules. Molecules that make up a compound are made up of different types of atoms, but molecules can also be made up of the same type of atoms. Two hydrogen atoms and one oxygen atom combine to form water. two hydrogen atoms and two oxygen atoms combine to form hydrogen peroxide,

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The maximum height reached by the apple thrown with an initial velocity of 8.50 m / s at 72° is 6.65 m

H = u² sin²θ / g

H = Maximum height

u = Initial velocity

g = Acceleration due to gravity

u = 8.5 m / s

g = 9.8 m / s²

θ = 72°

H = 8.5² sin² ( 72° ) / 9.8

H = 72.25 * 0.9 / 9.8

H = 6.65 m

If an object is thrown with an initial velocity at angle with the ground, it will move in a projectile motion. The object thrown is called as a projectile.

Therefore, the maximum height reached by the apple is 6.65 m

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θ = sin⁻¹√2gd

V2 = u2 + 2as is derived from one of the equations of motion, which is equation 1.

The initial velocity u would change to V0 sin because the item is moving at an angle of to the horizontal and the acceleration a would change to -g since the object is going against gravity.

Equation 1 would yield the following results if we entered all these parameters:

(u sin )2 - 2gd = v2

(u sin )2 equals 2gd

(u sin )2/2g = d

sin² θ = 2gd

sin θ = √2gd

θ = sin⁻¹ √2gd

The rate at which the velocity of an object changes in relation to time is known as acceleration. They are accelerations and vector quantities. The object's acceleration is determined by the direction of the net force acting on it.

All objects with mass or energy are attracted to one another by gravity, which is a fundamental interaction.

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According to the given statement 19e degrees north of east have you walked.

The correct option is A

A straight line is, to put it simply, a line without bends. An uncurved line that extends to infinity on both sides is said to be straight.

Even though they have no start or finish, straight lines are represented in everyday life by things like train tracks and freeways.

Focuses on four basic types of straight lines: vertical, horizontal, diagonal from left to right, and diagonal from right to left, as well as potential groupings of each.

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The complete question is -

If you walk 6.0 km in a straight line in a direction north of east and you end up 2.0 km north and several kilometers east. How many degrees north of east have you walked?

A) 19e

B) 45e

C) 60e

D) 71e

The average force of the beam expert is 648,365.

The force delivered to a body traveling at a specific speed for a specific amount of time is known as the average force. Since it possesses both momentum and direction, it is primarily a vector quantity. It differs between momentum and net force.

Average force is the force exerted by a body moving at a specific speed for a specific amount of time.

mass of pile driver (m) = 1900 kg

distance of pile driver to steel beam (s) = 4.80m

depth of steel driven (d) = 13.4= 0.134 m

acceleration due to gravity (g0 = 9.8 m/s^{2}

calculate the average force exerted on the pile driver by the beam.

from work done = force x distance

work done = change in potential energy of the pile driver

equating the two equations above we have

              force x distance = m x g x (s - d)

             f x 0.134= 1900 x 9.8 x (4.80- (-0.134))

             d = - 0.134because the steel beam went down at we are taking its  

             initial position to be an origin point which is 0

             f = ( 1900x 9.8 x (4.80- (-0.134)) ) ÷ 0.134

=648,365

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Answer: Flash

Explanation:

sonic can run 767mph

the flash can run roughly 8.3 million mph

Answer:

Sonic.

Explanation:

There is no direct answer, but Sonic leaves a bigger trail behind him than flash and Sonic has a boost and power-ups.

10 watt power will be delivered to push the box for 10 min 10 seconds by applying force of 10N to a box .

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The rest of the original candle’s mass was changed to gases.

The law of conservation of mass states that during a chemical reaction in an enclosed medium that there is neither generation or lost if it's mass but that it can be transformed.

Mass is defined as the scalar quantity that defines the quantity of matter found in a particular component or object.

The candle is made up of carbonic compounds that decreases in mass to form a puddle of wax when burnt.

The original mass of the candle was not lost but while some where converted to puddle of wax the rest escaped as gas to the atmosphere.

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The statement describes something that would not affect the results of the replicated experiment is option A. (The two experiments were completed by two different people)

An experiment can be defined as a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried.

Experiments helps in the provision of insight into the cause-and-effect by demonstrating what outcome occurs when a particular factor is manipulated.

If two experiments were completed by two different people, it would not affect the results if the experiment is replicated.

The purpose of any experiment is to test or verify a hypothesis

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Answer:

Faster-moving objects have more kinetic energy than slower objects.

Explanation:

A faster-moving object has:

a. more potential energy

b. more kinetic energy

c. equal kinetic and potential energies

d. energy based on the weight of the object

Hope this helps.

The independent variable is the different amount of repellent each person is given. This is because it does not depend on any variable. The dependent variable is what they are measuring, which would be the number of bites on each volunteer.
I hope this helps! :)

Answer:

the inertia of an object

Wind tends to blow from over the water to over the land on a sunny day because air over the water is cooler than air over the land is, the wind is caused by differences in density and the cool, dense air from over the water flows toward the land, pushing warm air upward. Making option A, C, and D the right answer to the question.

What is sea breeze?

The phenomenon where wind tends to blow from over the water to over the land on a sunny day is referred to as sea breeze.

The heat from the sun heats up the faster than water. Subsequently, air over land heats up faster than air over water, thus air above land becomes lighter causing the pressure to decrease.

In summary, Option B is wrong because the air above the land has a lesser density compared to the air above the water, and this is due to the characteristics of the wind blowing from a higher pressure area to a lower pressure area.

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Tapping the brakes is almost definitely going to be better than not tapping the brakes.

Using the brakes causes the static friction between your tires and the road to increase; which slows down the car more.

The issue is that when the grip between the brakes and the tire is too strong, the coefficient of friction between the tires isn't high enough to maintain that static contact. This is when the wheels "lock up" and begin to skid. As you mention, kinetic friction is less than static friction, so wheel lock and skidding should be avoided.

This means that tapping the brakes is generally the best braking method in these conditions, as compared to not braking at all.

When considering modern vehicles, your friend missed the mark even more. Most vehicles sold now (as far as I know) have an ABS, an Anti-lock Braking System which actually disengages the brakes when they reach the threshold when you start to lose traction. Basically, you can push down on the brake pedal as hard as you want, and you can feel the brakes start "tapping" on their own, to prevent skidding, increase traction, and allow you to brake in the lowest space possible. Tapping is the method most cars automatically employ on icy surfaces, and if you try it for yourself (in a controlled environment), you will find that tapping the brakes should slow you down a lot faster than not pressing it at all; especially if you avoid skidding.

Hence,

Tapping the brakes is almost definitely going to be better than not tapping the brakes.

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Car moves 3m after 5 seconds.

If an object's location changes over time in respect to its surroundings, it is said to be in motion. An object's position changes over time. There is just one kind of motion, and that is linear motion.

Immediately Speed. Instantaneous speed is the velocity of an item at a certain instant in time.

A particle's instantaneous velocity is its speed at any given moment in time or location along its route.

Final velocity: 0 m/s

Initially moving at 15 m/s

Acceleration equals 2 m/s^2.

Arrange to address the time problem:

t = 5 seconds

Use the following to calculate an distance at a constant rate:

Distance is equal to ( Vf +Vo)/ Time

Distance: (0 + 15 m/s)/ 5 sec

d=3-meter distance

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The ant will become weightless when the normal force between the string and the ant becomes zero .

On the center of a tightrope used in circus acts, a sizable ant is standing. A rope has mass for every unit of length. A tightrope walker steps up and down at the end of the tightrope in an attempt to shake the ant off the rope, creating a sinusoidal transverse wave of wavelength and amplitude A.

Assume that g is the gravity-induced acceleration's force. What is the smallest wave amplitude Amin required for the ant to briefly lose its weight while the wave passes beneath it? Assume that the ant's bulk is insufficient to affect the wave's propagation in any way. In terms of Ts,, g, and the smallest wave amplitude, write the expression.

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For Antonio to improve his self-awareness skills he should be able to recognise hie strengths and his weaknesses.

Self awareness is the act of being able to recognise your feelings and keep your character under control.

To be a self awareness leader, one should be able to have the following qualities:

Therefore, it can be said for Antonio to improve his self awareness skills, he should be able to recognise his strength and weaknesses and observe how his character affects the people around him.

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The time that the cannon ball spends in the air is 17.7 seconds.

The cannon ball in flight is a projectile.

Projectiles are objects that follow a parabolic path during their motion.

The time that the cannon ball spends in the air is calculated as follows:

The cannon ball is released with a horizontal velocity, u = 30 m/s

The cannon ball travels a horizontal distance, d = 533 m

When the cannonball was fired, it undergoes two types of motion:

The time spent in the air or time of flight, t, is the same for both the horizontal and vertical motion of the cannonball.

Time = 533 / 30

Times spent in the air = 17.7 seconds.

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Answer:

Power = 4000×60× 5/18

Explanation:

The reason for this result is because:

power=force × velocity.

This means that power = 400 × 60 × 5/18

The magnetic field is the area around a magnet in which there is magnetic force. Moving electric charges can make magnetic fields.

we are able to make this magnetic field more potent by using growing the quantity of electrical cutting-edge going thru the twine or we are able to grow the variety

A magnetic area is a vector field that describes the magnetic affect on shifting electric costs, electric-powered currents, and magnetic materials. A shifting charge in a magnetic area reviews a force perpendicular to its very own velocity and to the magnetic field.

The force is perpendicular to each the velocity v of the price q and the magnetic field B. 2. The significance of the force is F = qvB sinθ where θ is the angle < a hundred and eighty levels among the rate and the magnetic field.

Examples of magnetic force is a compass, a motor, the magnets that maintain stuff at the fridge, teach tracks, and new roller coasters. All transferring expenses supply upward thrust to a magnetic subject and the charges that flow through its regions, revel in a force

This discipline is shaped via the magnetic strains of pressure which run from the north pole to the south pole. these traces can be located to be most crowded at the 2 ends of the magnet which might be the poles i.e the north pole and the south pole.

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The independent variable in this condition of a varied temperature of the lake include the following:

This is the type of variable which doesn't depend on the condition of others and is usually altered by scientists so as to causal effects on the other types of variables which are present in the experiment.

In this scenario, the independent variables are those which are responsible for the temperature difference of the Lake hale and they include the depth and sun intensity. An increase in depth means the temperature will be lower while an increase in sun intensity means increase in temperature.

The dependent variable is the temperature which is affected by the changes in the parameters listed above.

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The other part of the question is:

What is the independent variable?

c or d

Explanation:

friction or conservation

1. Distance covered 200 Meters

2. Displacement 100 Meters

3. Displacement from starting position 0 Meters                                                                                                                                    

Distance is the sum of an object's movements, regardless of direction. Regardless of an object's starting or ending position, distance can be defined as the amount of ground it has covered.

Displacement refers to the idea that something has moved or been shifted. The term "displacement" refers to a shift in an object's position.

Solution.1 -Natasha sprints 100m and walks back to the starting position 100m.                                                                                                                        100m+-100m= - 200m

Therefore, the answer is 200                                                                                                                      

Solution.2 - Natasha sprints towards finishing line 100m then her displacement is 100m from starting line.

Solution.3 -Natasha sprints 100m towards Finishing line then walked back to starting line then her displacement is

100m - 100m =0 meters

Therefore the answer is 0 meters

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Explanation:

what does kinetic theory of matter state

Answer:

see below

Explanation:

x J  /  (2 kg * (300-20 C) =  450  J / (kgC)

x = 450 * 2(280) = 252000 J = 252 kJ

Answer:

Thermal energy lost = 252,000 J

Explanation:

change in thermal energy = mass x specific heat capacity x change in temperature

ΔE = mcΔθ

ΔE = change in thermal energy (J)

m = mass (kg)

c = specific heat capacity (J/kg℃)

Δθ = change in temperature (℃)

ΔE = 2 x 450 x (300-20)

ΔE = 252,000 J

Thermal energy lost = 252,000 J