anyone know the answer ?

The de Broglie wavelength of a baseball when thrown is much smaller than the size of an atom's nucleus. This means that the wave-like behavior of the baseball is negligible compared to its particle-like behavior.

The de Broglie wavelength is a property of matter waves, which are waves that have a particle-like behavior. It is calculated by dividing Planck's constant by the momentum of the particle.

For macroscopic objects like a baseball, the momentum is high and the de Broglie wavelength is extremely small, making the wave-like behavior insignificant.

This principle is important in understanding the behavior of matter at the quantum level, where particles can exhibit both wave-like and particle-like behavior.

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Lakes and rivers support a wide range of economic activities that provide employment opportunities, generate revenue

Lakes and rivers are home to a variety of fish species, making them ideal for commercial and recreational fishing. Fishermen can catch fish for sale or trade, providing a source of income for themselves and their families.

Many people visit lakes and rivers for recreational activities such as boating, swimming, and camping. This creates opportunities for businesses that cater to tourists, such as hotels, restaurants, and recreational equipment rental services.

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Answer:

Explanation:

The farther a celestial object (a mass in space) is from another, the less of a gravitational force that they have on each other.

Answer: Innovations originally designed for space vehicles, including artificial muscle systems, robotic sensors, diamond-joint coatings, and temper foam,

Explanation: make artificial human limbs more functional, durable, comfortable, and life-like.

The period of y for two satellites that are being watched as they orbit the planet is 22.63 times, and if the period of rotation of satellite x is T, satellite y.

Is four times as far from the Centre of the earth as satellite x. A satellite, often known as an artificial satellite, is a spacecraft that has been put into orbit on purpose. With the exception of passive satellites, most spacecraft have a method for producing electricity for the electronics they carry, such as solar cells or radioisotope thermoelectric generators. From above the Northern Hemisphere, Earth circles the Sun in a counterclockwise manner at an average distance of 149.60 million kilometres. It takes 365.256 days to complete one orbit.

Tx/Ty = (rx/ry) 3/2 = (8/1) 3/2 = 8 3/2 where Tx/Ty = (rx/ry) 3/2 =

X's revolution lasts for 8/3 = 22.63 times as long as Y does

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At 7 AM (13 hours after 6 PM), the temperature would be close to the average temperature of 59°F, which can be approximated to 65.9°F.

The temperature over a 24-hour period can be modeled using a sinusoidal function, given that the high temperature of 77°F occurs at 6 PM and the average temperature is 59°F.

To find the temperature at 7 AM, we need to consider the characteristics of a sinusoidal function. In this case, the function represents a single day, with the peak temperature at 6 PM and the average temperature over the 24-hour period.

Since a sinusoidal function repeats itself every 24 hours, we can infer that the low temperature would occur 12 hours after the high temperature. Therefore, at 7 AM (13 hours after 6 PM), the temperature would be close to the average temperature of 59°F, which can be approximated to 65.9°F.

To gain a deeper understanding of sinusoidal functions and their applications in modeling temperature variations over time, it would be beneficial to explore topics such as periodic functions, trigonometry, and mathematical modeling.

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The power factor of the circuit is 0.374 or 37.4%.

The power factor of a series RLC circuit can be calculated as follows:

1. Calculate the total impedance of the circuit:

   Z = R + j(X_L - X_C)

   where R is the resistance, X_L is the inductive reactance, and X_C is the capacitive reactance.

2. Calculate the current in the circuit:

   I = V/Z

   where V is the voltage of the power line.

3. Calculate the real power dissipated by the resistor:

   P = I^2 R

4. Calculate the apparent power of the circuit:

   S = V I

5. Calculate the power factor:

   pf = P/S

Plugging in the values given in the problem, we get:

1. Z = 100 + j(2π × 60 × 0.5 × 10^-3 - 1/(2π × 60 × 10^-6)) = 100 + j47.73 Ω

2. I = 120 / |Z| = 1.78 A

3. P = I^2 R = 80 W

4. S = V I = 213.6 VA

5. pf = P/S = 0.374

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Explanation:

To jump start she needs

1. Jumper cables

2. Power source/jump box/ portable batteries.

The positive end of the jump cable will be connected to terminal of the car battery and the jump box, likewise the negative terminal to complete the circuit for a successful jump start to be accomplished

Answer:Because it makes the stains like go away which makes the fabrics get not stained so yeah

Answer:

When it is accelerating or gaining velocity.

Explanation:

A car show positive acceleration when it is accelerating or gaining velocity. It would show negative acceleration if it was de-accelerating, slowing down or coming to a stop.

Answer:

When the velocity is increasing in the positive direction

Explanation:

The information given on the X-axis of the graph attached is the years from 1920-2005 (option B).

A graph in mathematics or statistics is a data chart (graphical representation of data) intended to illustrate the relationship between a set (or sets) of numbers (quantities, measurements or indicative numbers) and a reference set.

A graph consists of two axes namely; X-axis and Y-axis. The x-axis on a graph is usually drawn left to right and usually shows the range of values of an independent variable.

On the other hand, the Y-axis is the axis on a graph that is usually drawn from bottom to top and usually shows the range of values of variable dependent on one other variable.

Therefore, according to the graph illustrated above, the x-axis shows the years from 1920-2005.

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(8) A car starting with a speed v skids to a stop over a distance d, which means the brakes apply an acceleration a such that

0² - v² = 2 a d → a = - v² / (2d)

Then the car comes to rest over a distance of

d = - v² / (2a)

Doubling the starting speed gives

- (2v)² / (2a) = - 4v² / (2a) = 4d

so the distance traveled is quadrupled, and it would move a distance of 4 • 15 m = 60 m.

Alternatively, you can explicitly solve for the acceleration, then for the distance:

A car starting at 50 km/h ≈ 13.9 m/s skids to a stop in 15 m, so locked brakes apply an acceleration a such that

0² - (13.9 m/s)² = 2 a (15 m) → a ≈ -6.43 m/s²

So the same car starting at 100 km/h ≈ 27.8 m/s skids to stop over a distance d such that

0² - (27.8 m/s)² = 2 (-6.43 m/s²) d → d ≈ 60 m

(9) Pushing the lever down 1.2 m with a force of 50 N amounts to doing (1.2 m) (50 N) = 60 J of work. So the load on the other end receives 60 J of potential energy. If the acceleration due to gravity is taken to be approximately 10 m/s², then the load has a mass m such that

60 J = m g h

where g = 10 m/s² and h is the height it is lifted, 1.2 m. Solving for m gives

m = (60 J) / ((10 m/s²) (1.2 m)) = 5 kg

(10) Is this also multiple choice? I'm not completely sure, but something about the weight of the tractor seems excessive. It would help to see what the options might be.

A white dwarf remains stable in size due to electron degeneracy pressure, which prevents its atoms from collapsing further despite the absence of nuclear fusion reactions.

A white dwarf is a remnant of a low to medium mass star that has exhausted its nuclear fuel and undergone gravitational collapse. As the star's core collapses, its electrons become tightly packed together, leading to electron degeneracy pressure that opposes further compression. This results in a stable size for the white dwarf, where the inward force of gravity is balanced by the outward force of electron degeneracy pressure. Since there are no nuclear fusion reactions to generate heat, the white dwarf eventually cools and dims over time, becoming a cold black dwarf.

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The Jovian planets are formed from materials different from the terrestrial planets for the reason that gaseous Jovian planets, formed farther away from the heat of the Sun, are formed from light weight nebulae "dust."

A Jovian planet, also known as a gas giant, is a huge planet that has a primarily gaseous composition. The Jovian planets include Jupiter, Saturn, Uranus, and Neptune. They are primarily made up of hydrogen and helium, and they have enormous atmospheres.Jovian planets are formed farther away from the heat of the Sun, so they are formed from lighter-weight nebulae "dust." Terrestrial planets, on the other hand, are formed nearer to the Sun, so they are formed from heavier-weight nebulae "dust." The density of the materials that make up the Jovian planets is lower than that of the terrestrial planets due to this. This means that the Jovian planets have lower densities and a greater volume than the terrestrial planets.

Hence, the correct option is d. Gaseous Jovian planets, formed farther away from the heat of the Sun, are formed from light weight nebulae "dust."

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The further a planet is from the Sun, the colder its surface temperatures tend to be. Venus is an exception, since it has the highest surface temperature in our solar system due to its close closeness to the Sun and its thick atmosphere.

The inner planets are rocky, whereas the outer planets are gaseous, which can be attributed to the early solar system's temperature. The solar system's temperature increased as the gases came together to create a protosun. Temperatures in the inner solar system reached 2000 K, whilst in the outer solar system, it was only 50 K.

The quantity of heat received is just one of many intricate aspects that go into determining the temperature.

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Answer:

1) 6.53 × 10^5

2) 1.2943 × 10^5

3) 2.263 × 10^3

4) 1.48 × 10^-2

5) 9.04 × 10^-2

Answer:

The experiments are not shown, so I will answer in a general way.

By the first Newton's law, an object will only change it's velocity if there is a net force different than zero acting on the object.

Then in the experiments (depending on the experiment), you can see different things.

If an object is not moving and you apply a force in it, the object will move.

If an object is moving and you apply a force in the opposite direction of it's motion, the motion will: decrease the speed, stop at all, or move in the opposite direction. Depending on the force that you apply.

An excellent experiment (but hard to do) is dropping an object from a really high place.

The gravitational force will pull down the object and the object will start to increase it's velocity.

But there is the air resistance, that opposes to this motion and increases with the speed of the object.

Then there is a given speed such that the air resistance force will be equal to the gravitational force, then we have a balanced force (the net force is zero) which means that the object will keep falling at a constant velocity.

Answer:

Explanation:

Since the fans are blowing in opposite directions, the net force stays the same and so does the velocity. (I wrote this and got it right)

Answer:As a noun relative means a person who is connected with others by blood.

Someone who is related to you is a member of your family. All family members include parents, siblings, uncles, aunts, grandparents, cousins, nieces, and nephews. A relative may be related to your family by marriage or by blood.

The science of calculating one object's motion in relation to another moving object is known as relative motion. As a result, the motion is calculated relative to the other moving item rather than the earth, as if the object were in a static condition.

Any amount that is measured in relation to a standard quantity or another specific quantity is said to be relative.

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Answer:

1)  10 kg-m/s

2)  2 kg

3)  20 m/s

Explanation:

The momentum of an object can be calculated using the equation:

\(\large\boxed{p=mv}\)

where:

\(\hrulefill\)

For this question we need to find the momentum of a bowling ball whose mass is 4.0 kg is rolling at a rate of 2.5 m/s.

Given values:

Substitute the given values into the momentum formula and solve for p:

\(p=4.0\;\text{kg} \cdot 2.5\;\text{m/s}\)

\(p=10\;\text{kg m/s}\)

Therefore, the momentum of the bowling ball is 10 kg-m/s.

\(\hrulefill\)

For this question we need to find the mass of a skateboard rolling at a velocity of 3.0 m/s with a momentum of 6.0 kg-m/s.

Given values:

As we want to find mass, rearrange the momentum formula to isolate m:

\(\large\boxed{m=\dfrac{p}{v}}\)

Substitute the given values into the formula and solve for m:

\(m=\dfrac{6.0\; \text{kg m/s}}{3.0\; \text{m/s}}\)

\(m=2\;\text{kg}\)

Therefore, the mass of the skateboard is 2 kg.

\(\hrulefill\)

For this question we need to find the velocity of a baseball with a mass of 0.5 kg and a momentum of 10 kg-m/s.

Given values:

As we want to find velocity, rearrange the momentum formula to isolate v:

\(\large\boxed{v=\dfrac{p}{m}}\)

Substitute the given values into the formula and solve for v:

\(v=\dfrac{10\; \text{kg m/s}}{0.5\; \text{kg}}\)

\(v=20\;\text{m/s}\)

Therefore, the velocity of the baseball is 20 m/s.

Answer:

The equal forces are the force of the boy on the chair and consequently the ground.  Then the ground produces the opposite force on the chair

Answer:

Explanation:

This is a direct application of Newton's 2nd Law:

F = ma, where F is the force applied to an object, m is the mass of the object, and a is the acceleration of the object when this force is applied. Note: this is NOT the same as the acceleration due to gravity which is constant at -9.8 m/s/s or -32 ft/s/s. Filling in:

6.0 = m(12.0) so

m = .5 kg

Answer:

b. negative

Explanation:

neutrons have a negative charge and protons have a proton has a positive charge

The difference in momentum is zero. This is consistent with the law of conservation of momentum, which states that the total momentum of a closed system remains constant if no external forces act on it.

The momentum of a system is conserved, which means that the total momentum of the system before firing is equal to the total momentum of the system after firing. Before firing, the cannon and cannonball are stationary, so their momenta are zero. Therefore, the momentum of the system before firing is also zero.

After firing, the cannonball has a momentum of:

p_cannonball = m_cannonball * v_cannonball

where m_cannonball is the mass of the cannonball and v_cannonball is its velocity. Substituting the given values, we get:

p_cannonball = 10 kg * 93.5 m/s = 935 kg·m/s

The cannon has a momentum of:

p_cannon = m_cannon * v_cannon

where m_cannon is the mass of the cannon and v_cannon is its velocity. Substituting the given values, we get:

p_cannon = 850 kg * (-1.1 m/s) = -935 kg·m/s

Note that the velocity of the cannon is negative because it is moving in the opposite direction to the cannonball.

The total momentum of the system after firing is the sum of the momenta of the cannon and cannonball:

p_total = p_cannon + p_cannonball = (-935 kg·m/s) + (935 kg·m/s) = 0 kg·m/s

The difference between the momentum of the system before and after firing is therefore:

Δp = p_total - p_initial = 0 kg·m/s - 0 kg·m/s = 0 kg·m/s

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Answer:1.5m/s^2

Explanation:6/5=1.5m/s^2

In a runner weighs 507 N and 71% of this weight is water.(a) there are approximately 20 moles of water in the runner's body, and (b) there are approximately 1.204 x 10^25 water molecules (H2O) in the runner's body.

To calculate the number of moles of water in the runner's body, we need to determine the mass of water first. We can do this by multiplying the weight of the runner by the percentage of weight that is water:

Weight of the runner = 507 N

Percentage of weight that is water = 71%

(a) Calculating the mass of water:

Mass of water = (Percentage of water/100) * Weight of the runner

= (71/100) * 507 N

= 359.97 N

Next, we need to convert the mass of water into moles. To do this, we'll use the molar mass of water, which is approximately 18 g/mol.

Molar mass of water = 18 g/mol

(b) Calculating the number of moles of water:

Number of moles of water = Mass of water / Molar mass of water

= 359.97 N / 18 g/mol

≈ 20 moles

Finally, to calculate the number of water molecules (H2O), we'll use Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of water molecules = Number of moles of water * Avogadro's number

= 20 moles * 6.022 x 10^23 molecules/mol

≈ 1.204 x 10^25 water molecules

Therefore, (a) there are approximately 20 moles of water in the runner's body, and (b) there are approximately 1.204 x 10^25 water molecules (H2O) in the runner's body.

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Answer:

The process of comparison of unknown quantity with the help of known standard quantity is known as measurement...Hope this helps:)

Answer:

the comparison of an unknown quantity with the known quantity.

Explanation:

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Answer:

friction

Explanation:

Her brakes will squeak and possibly slide or skid on concrete due to her brakes.

BUT it really depends on the condition of the wheels. Now it matters on the surface as well. Has the road been eroded? what has happened with her brakes? and what texture are the wheels? can seismic waves travel through them?

Answer:

thinking distance stays the same and the braking distance increases

AQA Approved.✅

Explanation: