An astronaut orbits the Earth in a space station.Which is a vector quantity

In a hydraulic lift system, a piston with a diameter of 2.0 cm is pushed down to raise another piston with a diameter of 8.0 cm by 20 cm. The task is to determine how far the smaller piston needs to be pushed down.

In a hydraulic lift system, the principle of Pascal's law is applied, which states that pressure is transmitted equally in all directions within an enclosed fluid. According to this principle, the ratio of the cross-sectional areas of the pistons is inversely proportional to the force applied.

In this case, the ratio of the cross-sectional areas of the larger piston (8.0 cm diameter) to the smaller piston (2.0 cm diameter) is 16:1 (since the area is proportional to the square of the diameter). Therefore, if a force is applied to the smaller piston, it will result in 16 times the force on the larger piston.

Since the larger piston needs to be raised by 20 cm, the smaller piston must be pushed down by a distance that is 16 times greater, which is 16 * 20 cm = 320 cm. Therefore, the smaller piston needs to be pushed down by 320 cm (or 3.2 meters) to raise the larger piston by 20 cm in the hydraulic lift system.

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The potential difference that stopped the electron is infinite. The initial kinetic energy of the electron is 62 eV.

To determine the potential difference that stopped the electron, we will use the formula of potential energy change, ΔV.ΔV = KQ/R

where K is Coulomb’s constant (9 x 109 N•m²/C²), Q is the charge, and R is the distance between the charges.

Here, R = 0 since the electron is brought to rest by an electric field. Thus, we have:

ΔV = (K x 1.60 x 10⁻¹⁹ C)/0

ΔV = ∞

The potential difference required to stop the electron is infinite.

Now, we will determine the initial kinetic energy of the electron. The formula for kinetic energy is given as:

K.E = 1/2 mv²

K.E = 1/2 (9.11 x 10⁻³¹ kg) (460000 m/s)²

K.E = 9.92 x 10⁻¹⁸ J

Converting Joules to electron volts,

1 eV = 1.6 × 10⁻¹⁹ J

Thus, the Initial kinetic energy of the electron,

K.E = (9.92 x 10⁻¹⁸J) / (1.6 × 10⁻¹⁹ J/eV) = 62 eV

So, the initial kinetic energy of the electron is 62 eV.

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The retention factor for a dye that travels 60mm if the solvent travels 80mm is 0.75.

The distance traveled by Solute travelled =60mm

The distance that Solvent traveled=80mm

Retention factor=The distance traveled by Solute travelled /The distance that Solvent traveled

rf=60/80=0.75

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Ultra = X-ray

Explanation:

how are things going to paint the roof for beginners painting and decorating the whole house so I'm going away with a few sports mates for a couple nights for beginners but will have a look painting at a time and see what is going to be Strong enough

Answer:

plane

Explanation:

Explanation:

yan lng po Alam ko

The electric potential due to a point charge of +2.00 μC at a distance of 0.500 cm is 3.6 x 10^4 V.

The electric potential due to a point charge can be calculated using the formula:

V = kq/r

where V is the electric potential, k is Coulomb's constant (9.0 x 10^9 Nm^2/C^2), q is the charge, and r is the distance from the point charge.

Substituting the given values, we have:

V = (9.0 x 10^9 Nm^2/C^2) x (2.00 μC) / (0.500 cm)

= 3.6 x 10^4 V

If the charge has a value of -2.00 μC, the sign of the potential will be negative, indicating that the potential energy of a positive test charge would decrease as it moves away from the point charge. The magnitude of the potential will be the same, since it depends only on the absolute value of the charge, not its sign.

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Answer: false.

Explanation:

Doppler effect is caused to the relative motion of the source of light/sound with respect to the observer.

If the source is moving towards you, you will perceive the frequency to be larger (also called a blue shift), while if the wave is moving away, you will perceive the frequency to be smaller (also called a red shift).

Then the statement:

"Doppler effect is caused by sound or light wave being pushed together and spread apart due to motion."

Is false

Answer: Bleach is a base

Explanation:  If bleach had a pH level of 12, a number above 7, than it is a base.  Hope this helps!

The scientific theory cannot be accepted immediately, because there is always the possibility of discovering new information or modification.

A scientific theory is an explanation of the natural world and universe that has been repeatedly tested in accordance with the scientific method. Theories are tested under controlled conditions in an experiment and are evaluated through principles of abductive reasoning.

A scientific theory differs from scientific law in that a theory explains how or why is a basic observation, whereas a law is a statement about a relationship between facts. Newton’s Law of Gravity is a mathematical equation that can be used to find the attraction between objects, but it is not a theory to describe how gravity works.

If experimental results contrary to predictions of the theory are observed, scientists evaluate whether the experimental design was good and confirm the results by independent replication.

Solutions may need some changes to the theory, or none at all, and after the successive modifications, theories consistently improve and greater accuracy is achieved.

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Players can move more quickly and fall less frequently by minimising friction between the ice and their skates by smoothing the ice surface with an ice resurfacer.

A mechanised ice resurfacer is called a Zamboni. It operates by scraping the snow off of the ice surface. The ice is then "cleaned" by pouring water upon it, which flushes any dirt or debris out of the deep grooves in the ice.

An NHL hockey game typically lasts 60 minutes. Three 20-minute periods make up a game, with a rest period in between the first and second. While they could be shorter in other leagues, NHL intermissions last 18 minutes.

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My velocity is  -0.09m/sec in opposite direction of football direction.

We are given that we are standing on a very slippery surface,  means that we assume friction is not there.

So, energy lost is zero. It means that we need to conserve momentum in x-direction as the ball is travelling in +x direction after it is kicked.

My initial velocity (u₁)=0m/sec, initial velocity of football=0m/sec.

Final velocity of ball(v)=7.5m/sec, mass of football=1kg,my mass=77kg

Therefore, we apply law of conservation of momentum, we get

=>Initial momentum= final momentum

=>0  =  77×v+1×7.5

=>v= -7.5/77

=>v= -0.09m/sec

Hence my velocity when I release the football is 0.09m/sec in opposite direction of football .

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Answer:

It is d

Explanation:

Answer:

D !!!!!

Explanation:

1. speed = distance/time taken

= 1200/5×60

= 4 m/sec.

then Siham run 4 meters each ine second.

2. if speed = distance/time taken

then time taken= distance/ speed

= 200/1.5 = 200÷(3/2)

= 200×(2/3)

= 133.3333....sec.

then I need 133.333 sec to get to class early.

3. from the previous example

then distance = speed × time taken

= 60×5.5

= 60×(11/2)

=330 km. or 330×10³m.

then Mahmoud ❤️ covers 330km.

4.the q question is repeated.

Answer:

.3m

Explanation:

Apex

0.3 is right i just got it right on the test for A P E X :D

ANSWER

Q = 5303.95 kJ

EXPLANATION

We are looking for the energy needed to evaporate 2.35kg of water. Since the water is already at evaporation temperature, which is 100°C, we just have to use latent heat. Also, we just want the steam to be at 100°C, so we don't need to find the energy to change its temperature.

The energy needed to evaporate water of mass m is:

L is the latent heat of the material, in this case water. There are two latent heats, one of fusion and one of vaporization. We have to use the second one, which for water is approximately 2257 kJ/kg

Therefore, to boil 2.35 kg of water at 100°C to steam at 100°C we need:

Answer:

Because at the point of contact the path difference is zero but one of the interfering ray is reflected so the effective path difference becomes λ/2 thus the condition of minimum intensity is created hence centre of ring pattern is

Explanation:

Off google not mine

Answer:

8000 J

Explanation:

There is a Quizlet made by a teacher with this answer.

To make the red light appear green, you would need to be traveling at a speed of approximately 2.727×10⁸ m/s.

The color of light is determined by its wavelength. Red light has a longer wavelength than green light, with the given values of 650 nm and 550 nm, respectively.

The frequency of light is inversely proportional to its wavelength, so we can use the formula:

frequency = speed of light / wavelength

Given that the speed of light is 3×10⁸ m/s, we can calculate the frequencies of red and green light:

Frequency of red light = (3×10⁸ m/s) / (650×10⁻⁹ m) = 4.615×10¹⁴ s⁻¹

Frequency of green light = (3×10⁸ m/s) / (550×10⁻⁹ m) = 5.455×10¹⁴ s⁻¹

To perceive the red light as green, we need to match the frequencies. Since the speed of light remains constant, we can equate the two frequencies:

(3×10⁸ m/s) / (λ_red) = (3×10⁸ m/s) / (λ_green)

Simplifying the equation, we find:

λ_red = λ_green

From this, we can determine the speed required to make the red light appear green:

v = (λ_red - λ_green) / λ_green = (650×10⁻⁹ m - 550×10⁻⁹ m) / 550×10⁻⁹ m = 100×10⁻⁹ m / 550×10⁻⁹ m

v ≈ 2.727×10⁸ m/s

Therefore, in order for the red light to appear green, you would need to be moving at a velocity of approximately 2.727×10⁸ m/s.

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If Mr. Vinny's mass is 76 kg, the scale read 744N in Newtons when the elevator is at rest

What does "gravitational acceleration" mean?

Acceleration owing to gravity is the term used to describe the speed at which freely falling bodies accelerate due to the force of the other body's attraction. It is a constant amount for a specific attracting body at a specific location. The average acceleration caused by gravity is 9.8 m/s2, just as it is for earth on or near its surface.

Inertia is a fundamental characteristic of all matter and is quantifiably measured by mass. The resistance a body of matter offers to a change in its speed or location as a result of the application of a force is what it is in essence. The change a force applies produces a change that is smaller the more mass a body has.

When the elevator is at rest,

m is 76kg

The scale will read mg i.e. 76*9.8 ⇒744N

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A. r ≈ 1.82 ✕ 10^-4 m

B. r ≈ 9.09 ✕ 10^-4 m

To find the distance from a point charge where the potential is a specific value, we can use the formula:

V = kQ / r

where V is the electric potential, k is the electrostatic constant (8.99 ✕ 10^9 Nm²/C²), Q is the charge (6.50 µC), and r is the distance from the charge.

1. For the potential of 250 V:
250 V = (8.99 ✕ 10^9 Nm²/C²) (6.50 ✕ 10^-6 C) / r
Solving for r, we get:
r ≈ 1.82 ✕ 10^-4 m

2. For the potential of 5.00 ✕ 10^2 V:
5.00 ✕ 10^2 V = (8.99 ✕ 10^9 Nm²/C²) (6.50 ✕ 10^-6 C) / r
Solving for r, we get:
r ≈ 9.09 ✕ 10^-4 m

Your answer: 1.82 ✕ 10^-4 m, 9.09 ✕ 10^-4 m

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Answer: Therefore, the mass of the object is 2.222 kg on the Earth, Moon, Saturn, Mercury and everywhere else it goes.

Explanation:

Answer:

the mass is 2.04

Explanation:

The weight of an object is calculated by: W=Mg

Solving for M:  M=W/9

M=20/9.8 = 2.04

The unit of wavelength depends on the type of wave being described. In the International System of Units (SI), the unit of wavelength is the meter (m). This is the case for most types of waves, including electromagnetic waves (such as light), sound waves, and mechanical waves.

What is wavelength?

Wavelength is the distance between two consecutive points of the same phase on a wave. It is the distance traveled by a wave in one period (the time it takes for the wave to complete one cycle). The wavelength is usually denoted by the Greek letter lambda (λ).

For example, the wavelength of a radio wave might be measured in meters, the wavelength of visible light might be measured in nanometers (nm), and the wavelength of a sound wave might be measured in centimeters (cm).

In some fields of physics, other units of length may be used to express wavelength. For example, in the field of quantum mechanics, the unit of length is often the angstrom (Å), which is equal to 0.1 nanometers (nm).

Therefore, the unit of wavelength varies depending on the type of wave.

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The final speed of the go-cart in this inelastic collision is 70 m/s. The result is obtained by using the concept of inelastic collision.

The inelastic collision of two objects occur when some of the kinetic energy is lost, converted to other forms. It means that the law of conservation of kinetic energy doesn't apply.

In this case, both objects will stick together and move together with the same speed. The law of conservation of momentum applies.

m₁v₁ + m₂v₂ = m₁v₁' + m₂v₂'

Where

The 4-wheeler collides with the go-cart in inelastic collision.

Find the final speed of the go-cart!

Note that this is an inelastic collision. In this case, the 4-wheeler and go-cart will stick together and move with the same speed.

The formula for conservation of momentum will be

m₁v₁ + m₂v₂ = m₁v₁' + m₂v₂'

m₁v₁ + m₂v₂ = (m₁ + m₂)v'

It means that

v₁' = v₂' = v'

The final speed of the go-cart is the same with the final speed of the 4-wheeler.

v₂' = v₁' = 70 m/s

Hence, the go-cart will have the final speed of 70 m/s.

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The answer is B. 0.67 A.When the capacitor in this circuit is fully charged,  the current out of the battery is 0.67 A .

To answer this question, we need to first understand how a capacitor works in a circuit. A capacitor stores electric charge and, when connected to a circuit, it starts to charge up. As the capacitor charges up, the current flowing through it decreases until it reaches zero. At this point, the capacitor is fully charged.
In the given circuit, the capacitor is connected in series with a resistor and a battery. When the capacitor is fully charged, there is no current flowing through it, and all of the current flowing from the battery is flowing through the resistor.
Using Ohm's Law, we can calculate the current, I1, flowing from the battery:
I1 = V / R
where V is the voltage of the battery and R is the resistance of the resistor.
From the given values in the circuit, we have:
V = 9V (the voltage of the battery)
R = 13.5 ohms (the resistance of the resistor)
Therefore,
I1 = 9V / 13.5 ohms = 0.67 A
So the answer is B. 0.67 A.

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Answer:

Your mass is the same no matter where you go in the universe; your weight, on the other hand, changes from place to place. Mass is measured in kilograms; even though we usually talk about weight in kilograms, strictly speaking it should be measured in newtons, the units of force

In summary, mass is a measure of how much matter an object contains, and weight is a measure of the force of gravity acting on the object. ... The amount of gravity is directly proportional to the amount of mass of the objects and inversely proportional to the square of the distance between the objects.

Explanation:

Answer:

10*2.5=25

Explanation:

The answer is 25 volts

Answer:

25 Volts

Explanation:

2.5 multiplied by 10 is 25.

Answer:

it was the gods of war.....

Answer:

juliest and august cesar

Explanation:

The time taken for the object to fall the same distance in planet X is determined as 8.5 seconds.

The time taken for the object to fall the same distance on planet X is calculated as follows;

t = √2h/g

where;

t² = 2h/g

gt² = 2h

g₁t₁² = g₂t₂²

t₂² = g₁t₁²/g₂

t₂² = (g₁ x 3.8²) / (0.2g₁)

not e one-fifth = 1/5 = 0.2

t₂² = 72.2

t₂ = √72.2

t₂ = 8.5 seconds

Thus, time taken for the object to fall the same distance in planet X is determined as 8.5 seconds.

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