Suppose that Earth's polar ice caps melted and the water returned to the oceans, so that the oceans were deeper by about 31.2 m. What effect would this have on Earth's rotation? Make an estimate of the resulting change in the length of the day. (Concern has been expressed that warming of the atmosphere resulting from industrial pollution could cause the ice caps to melt.) Number i Units

The inverted pendulum model is the most basic mechanical system that can replicate the motion of the centre of gravity during gait.

In this model, the hip joint serves as the pivot point for the leg's inverted pendulum. The inverted pendulum's swinging motion can be used to model how the centre of mass moves during gait. The centre of mass moves in an arc as the leg swings back and forth, imitating the natural stride. This mechanical device, which has been sped up, depicts the basic dynamics of walking and offers insights into the coordination and control of human mobility.

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Answer:

Hey!

Your answer is that the ATOMIC MASS of Helium is 4 u ROUNDED to 2 decimal places!

Explanation:

The precise amount is 4.002602 u.

Given,

The weight of the child, W=500 N

The weight of the friend, w= 300 N

The distance from the pivot to the child, D=2.0 m

The distance from the pivot to the friend, d=2.0 m

a.

The moment of the child is given by,

On substituting the known values,

Thus the moment of the child is 1000 Nm

b.

The moment of the friend can be calculated using the formula,

On substituting the known values,

Thus the moment of the friend's weight is 600 Nm

c.

To balance the seesaw the total moment to the right of the center must be equal to the total moment to the left of the center.

The distance of the right end from the center of the seesaw is s=2.5 m

Thus,

Where F is the downward force needed.

Thus the downward force needed to be applied at the right end is given by,

On substituting the known values,

Thus the downward force that must be applied at the right-hand end of the seesaw is 160 N.

A lab report on a scientific experiment in which students construct a roller coaster lab report for a tiny marble is called a "Marble Roller Coaster."

The experiment's goal is to comprehend physics concepts like potential and kinetic energy, friction, and gravity. The goal of the lab report, materials utilised, steps taken, data gathered, and findings achieved are often covered in parts of the report. A lab report on a scientific experiment in which students construct a roller coaster for a tiny marble is called a "Marble Roller Coaster." The discussion of the findings, in which the students analyse the information and make inferences about the experiment, is also included in the report. The study could potentially include suggestions for enhancing the roller coaster's design in the future.

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what is marble roller coaster lab report?

Answer:

4.763 × 10⁶ N/C

Explanation:

Let E₁ be the electric field due to the 4.0 μC charge and E₂ be the electric field due to the -6.0 μC charge. At the third corner, E₁ points in the negative x direction and E₂ acts at an angle of 60 to the negative x - direction.

Resolving E₂ into horizontal and vertical components, we have

E₂cos60 as horizontal component and E₂sin60 as vertical component. E₁ has only horizontal component.

Summing the horizontal components we have

E₃ = -E₁ + (-E₂cos60) = -kq₁/r²- kq₂cos60/r²

= -k/r²(q₁ + q₂cos60)

= -k/r²(4 μC + (-6.0 μC)(1/2))

= -k/r²(4 μC - 3.0 μC)

= -k/r²(1 μC)

= -9 × 10⁹ Nm²/C²(1.0 × 10⁻⁶)/(0.10 m)²

=  -9 × 10⁵ N/C

Summing the vertical components, we have

E₄ = 0 + (-E₂sin60)

= -E₂sin60

= -kq₂sin60/r²

= -k(-6.0 μC)(0.8660)/(0.10 m)²

= -9 × 10⁹ Nm²/C²(-6.0 × 10⁻⁶)(0.8660)/(0.10 m)²

= 46.77 × 10⁵ N/C

The magnitude of the resultant electric field, E is thus

E = √(E₃² + E₄²) = √[(-9 × 10⁵ N/C)² + (46.77 10⁵ N/C)²) = (√226843.29) × 10⁴

= 476.28  × 10⁴ N/C

= 4.7628 × 10⁶ N/C

≅ 4.763 × 10⁶ N/C

The magnitude of the electric field is mathematically given as

E= 4.7628 *10^6 N/C

Question Parameters:

Charges of 4.0 μC and −6.0 μC

an equilateral triangle with sides of 0.10 m.

Generally, the equation for the sum of electric fields  is mathematically given as

For Hrizontal component

E3 = -E1 + (-E2cos60)

E3= -kq1/r^2- kq₂cos60/r^2

E3= -k/r^2(4 μC - 3.0 μC)

E3= -9 × 10^5 N/C

For vertical  component

E4 = 0 + (-E2sin60)

E4= -k(-6.0 μC)(0.8660)/(0.10 m)²

E4= 46.77 × 10^5 N/C

Therefore, The magnitude of the resultant electric field

\(E = \sqrt{(E3^2 + E_4^2)}\\\\E=\sqrt{[(-9 * 10^5 N/C)^2 + (46.77 10^5)^2) }\)

\(E= 4.7628 *10^6 N/C\)

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F = m • a (I. Newton)

F = (4 kg) x (5 m/s^2)

F = 20 Newtons

Answer:

The correct option is;

D) The force exerted on the astronaut by Earth is equal to the force exerted on Earth by the astronaut

Explanation:

According to Newton's third law of motion, in nature, for every action, there is an equal and opposite reaction, such that if a first object exerts a certain amount of force on a second object, the second object will exert a force of equal magnitude and opposite direction to that exerted by the first object

Therefore, the gravitational force exerted by Earth on the astronaut, is equal to the force exerted by the astronaut on Earth.

The claim from the options that is true about the force exerted on the astronaut by Earth is;

Option D; The force exerted on the astronaut by Earth is equal to the force exerted on Earth by the astronaut.

Force(F) = Mass * Acceleration

Thus, the same force exerted on the astronaut by the earth is same exerted on the earth by the astronaut.

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Explanation:

Hydraulic systems use the pump to push hydraulic fluid through the system to create fluid power. The fluid passes through the valves and flows to the cylinder where the hydraulic energy converts back into mechanical energy. The valves help to direct the flow of the liquid and relieve pressure when needed

Looking at the velocity graph on the right, the object changes direction at 1 sec.

If a line representing the position or displacement of an object on a graph crosses over the x-axis, from the positive region to the negative region (or vice versa), it indicates a change in direction of the object.

On a position or displacement graph, the x-axis typically represents time, and the y-axis represents the position or displacement of the object.

Thus, when the line representing the object's position or displacement crosses the x-axis, it means that the object has reached a point where its position or displacement changes from positive to negative (or vice versa).

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Answer:5110.2 joule

Explanation:Weight of the crate:- 8.35 x 102 N

Height to which the forklift lift the crate:- 6.0 M

Work done by the forklift=F.d

F=Gravitational Force =m.g

d=height=h

Work w=m.g.h

m.g=8.35 x 102 N

h=6.0 M

w=8.35x102N x 6.0M

w=5110.2NM

w=5110.2joule

Answer: The car slows down by 10 meters per second every second.

Explanation:

AnswerThe speed of a car is decreased uniformly from 30. meters per second to 10. meters per second in 4.0 seconds. What was the car's acceleration ?

We have the following data:

V (final velocity) = 10 m/s

Vo (initial velocity) = 30 m/s

ΔV  (speed interval)  = V - Vo → ΔV  = 10 - 30 → ΔV  = - 20 m/s

ΔT (time interval) = 4.0 seconds

a (average acceleration) = ? (in m/s²)

Explanation:

Answer: D. It shows Newton's first law of motion, which states that an object tends to stay in motion unless an outside force acts upon it.

Explanation:

Newton's first law of motion states that an object tends to stay in motion unless an outside force acts upon it.

Thus,  the light intensity needs to be equal to or greater than 0.0098 N in order to horizontally suspend the paper in the vertical beam of light.

To horizontally suspend the black paper in a vertical beam of light, the light intensity needs to be strong enough to counteract the force of gravity on the paper.

This means that the light intensity needs to be equal to or greater than the force of gravity on the paper.

The force of gravity on the paper can be calculated using the formula F = m*g, where F is the force, m is the mass, and g is the acceleration due to gravity (approximately 9.8 m/s^2).

Plugging in the values given, we get:

F = 1.0 g * 9.8 m/s^2
F = 0.0098 N

Therefore, the light intensity needs to be equal to or greater than 0.0098 N in order to horizontally suspend the paper in the vertical beam of light.

Note that the dimensions of the vertical beam of light are not relevant to this calculation, as long as the beam is large enough to fully illuminate the paper.

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Answer:

This is Newton’s third law (forces due to friction). There would be 15N being pushed back at Jane.

Explanation:

Newton’s third law states that for every action there is an equal and opposite reaction. So if Jane pushed with a force of 15N, 15N would be pushed back at her. Hope this helps! :)

Answer:

Density is 8 g/cm³

Explanation:

\(density = \frac{mass}{volume} \\ \)

mass » 80 g

volume » 10 cm³

\(density = \frac{80 \: g}{10 \: {cm}^{3} } \\ \\ = 8 \: {gcm}^{ - 3} \)

Answer:

mass=80

volume=10

density=mass/volume

which is 80/10

so the density is equals to 10.

27.5 m/s. If the average force exerted on the arrow by the bow was increased 3 times and the arrow was accelerated over the same distance

The velocities did not match because each person was measuring the relative velocity of the other drivers from their own perspective.

The reason why the three drivers' velocity measurements did not match is because they were measuring the relative velocities of the other drivers from their own perspectives. This means that each driver's measurement was influenced by their own motion and position.

For example, if one driver was traveling towards another driver, their velocity measurement would be higher than the velocity measurement of the driver who was traveling away from the same driver.

Therefore, it is important to take into account the observer's motion and position when measuring velocities to ensure accurate measurements.

This phenomenon is known as the observer effect and is commonly observed in physics.

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When the weight and angles are given then the tension in both the ropes are calculated as 116.27 N each.

If an object is held stationary, then all the forces must balance and this is called static equilibrium.

In classical mechanics, a particle is said to be in mechanical equilibrium if  net force on that particle is zero. A physical system made up of many parts is in mechanical equilibrium if net force on each of its individual part is zero.

As ΣFx=0

So, −T1cos60°+T2cos60°=0

Then, T1=T2(cos60°/cos60°)

As, ΣFy=0

So, T1sin60°+T2sin60°−200=0

Then, T2cos60°/cos60°(sin60°)+T2sin60°−200=0

T2 *0.86 +T2 * 0.86- 200= 0

1.72 T2= 200

We get, T2= 116.27 N

T1=T2cos60°/cos60°

So, T1 = 116.27 N

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The ksp (solubility product constant) in CaCO₃ solubility (formula weight 100.1) is 0.0095 g in 1800 ml = 2.8 x 10⁻⁹ (option A)

The equilibrium constant for a saturated solution of an ionic chemical at a specific temperature is known as the solubility product constant (Ksp). We need to know the compound's molar solubility in order to determine the Ksp.

m = 0.0095 g

Mr = 100 g/mol

V =  1800 ml.

M = (m/Mr) x (1000/V)

= (0.0095 / 100) x (1000 / 1800)

= 5.2 x 10⁻⁵

Ksp CaCO₃ ⇒ Ca²⁺ + CO₃²⁻

Ksp CaCO₃ = s²

Ksp CaCO₃ = (5.2 x 10⁻⁵)²

= 2.8 x 10⁻⁹

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Answer:

A object, lets say a cup. This cup will never, ever move unless something or someone disturbs it. If something touches or hits this cup the cup will move. But, until the cup gets touched, nothing will EVER make it move.

Explanation:

I hope this helps!!

The forces listed are considered fundamental forces (2) gravitational (4) strong nuclear (6) electroweak.

Fundamental force, also called fundamental interaction, in physics, is any of the four primary forces—gravitational, electromagnetic, sturdy, and weak—that govern how gadgets or particles interact and how certain particles decay. All of the regarded forces of nature may be traced to those essential forces.

Now, physicists say they have discovered viable symptoms of a fifth essential force of nature. The findings come from studies performed at a laboratory near Chicago. The four fundamental forces govern how all of the objects and particles inside the Universe engage with each other.

The strong nuclear pressure pulled definitely and negatively charged quarks collectively to form undoubtedly charged protons and neutrally charged neutrons. The strong nuclear force also binds protons and neutrons within the nucleus of atoms. The weak nuclear force enabled complicated atoms to form through nuclear fusion.

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The density of a block of aluminum that has a volume of 15.0 cm³ and a mass of 40.5 g is 2.7 g/cm³ .

Density is the mass of a material substance per unit volume. Its SI unit is k g /m³ . Mathematically it is given as,

d = M/V,

where d is density,

M is mass and V is volume

Grams per cubic centimeter are a typical unit of measurement for density. Density of a substance is the characteristics of that substance

The density of a block of aluminum that has a volume of 15.0 cm³ and a mass of 40.5 g is 2.7 g/cm³.

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The average density of the Sun is high even though its composition is 99.9 % by atoms, 98.5% by mass, Hydrogen and Helium gases because of the immense gravitational forces acting on its massive core.

However, due to its enormous size and mass, the gravitational force at its core is substantial. This force compresses the gases within the Sun, causing them to become denser and hotter. As a result, the pressure and temperature at the core of the Sun are extreme, reaching millions of degrees Kelvin. These conditions facilitate nuclear fusion, a process that converts Hydrogen nuclei into Helium, releasing a tremendous amount of energy in the form of light and heat.

The energy generated by nuclear fusion keeps the Sun in a state of hydrostatic equilibrium, which is a balance between the inward gravitational force and the outward pressure exerted by the gases. This equilibrium maintains the Sun's high average density, despite its predominantly gaseous composition. In summary, the Sun's average density is high due to the immense gravitational forces compressing the Hydrogen and Helium gases in its core and the high pressure and temperature that facilitate nuclear fusion. These factors contribute to the Sun's hydrostatic equilibrium, which sustains its high density.

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Answer:

i dont know the answer sorry have a good day

Explanation:

hsjsjdkdkdkdkdkdk

Answer:

b the balls maximum height

When a car travels at 5m/s and brakes at the rate of 2 m/s², the length of time to travel 6 m is 2 or 3 seconds.

Use the equation of motion for deceleration:

s = u . t - 1/2. a t²

Where:

s = distance

u = initial velocity

t = travel time

a = acceleration (minus sign means deceleration)

Parameters given in the problem:

s = 6 m

u = 5 m/s

a = 2 m/s²

Plug these parameters into the formula:

6 = 5t - 1/2. 2 . t²

t² - 5t + 6 = 0

(t - 3) (t - 2) = 0

t = 3  or  t = 2

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Answer:A

Explanation:

A P E X

Increasing human population have advanced the problem of the impact of humans on the environment as shown above.

We know that the environment has to do with our natural surroundings. The environment has to do  with that space that is around us from which we obtain the materials and energy that are necessary to support life.

We know that the greatest pressure that is placed on the environment and the resources that is in it comes from anthropogenic activities. These are the activities of the people that live within the environment. The extraction of resources for the provision of energy as well as construction pts great pressure on the environment

As we look at the image, we call to mind that the the explosions in the population of human beings have put more pressure on the environment and thus made it unable to support the human population.

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