a basketball referee tosses the ball straight up for the starting tip-off. at what velocity (in m/s) must a basketball player leave the ground to rise 1.12 m above the floor in an attempt to get the ball?

Answer:

If the water in the left side drops .2 m then the water on the right side rises by .2 m

The pressure on the gas is due to the height difference of the water on the two sides.

P = ρ g h

ρ g = 9.8 m/s^2 * 1000 kg / m^3 = 9800 N/m^3      weight density of water

P = 9800 N/m^3 * .4 m = 3920 N / m^2 = 3.92E3 N/m^2

Absolute pressure of gas = 3.92E3 / 1.01E5 = .0388 atmosphere

Answer:

red supergiants can

Answer:

a

Explanation:

mark me as brainlist ez

Answer:

Explanation:

The moment of inertia of an object is a property that describes its resistance to rotational motion.

It is determined solely by the mass distribution of the object and the geometry of its shape, and it does not depend on the angular velocity of the object.

This can be seen from the formula for the moment of inertia, which is given by:I = ∫ r^2 dmwhere I is the moment of inertia, r is the distance from the axis of rotation to the mass element dm, and the integral is taken over the entire mass distribution of the object.

The moment of inertia depends only on the mass distribution of the object and how that mass is distributed around the axis of rotation.

This means that even if the object is rotating at different speeds or in different directions, its moment of inertia will remain the same, as long as the mass distribution is unchanged.

The net magnetic force on each side of triangle will be 0, when A loop of wire has the shape of a right triangle and carries a current of i = 4.10A  .

When a moving charged particle (such an electron or a proton) is placed in a magnetic field, a magnetic force is applied to it. The right-hand rule provides the direction of the magnetic force, which is always perpendicular to the magnetic field and charged particle velocity. The magnetic force acting on a current-carrying wire is the force generated by the magnetic field as a result of the motion of the charges (electron mobility) within the wire. The strength and direction of the magnetic field, the current flowing through the wire, and the orientation of the wire with respect to the magnetic field all affect the magnitude and direction of the magnetic force.

The magnetic force can be calculated by the formula,

F = BI L sinθ

AB ,  θ = -180°

Fab = 0N

For, Fac , θ = 90°

Fac = 1.6× 4.10 ×L× sin90°

ac = AB tan 55°

ac = 2.85m

Fac = 1.6 × 4.10 × 2.85× sin90°

Fac = 18.6N

The above magnetic force into the page is 18.6N. Thus similarly out of the page magnetic field can be calculated as, Fbc = 18.6 N

Fnet = Fab + Fbc +Fac

Fnet = 0 + 18.6 - 18.6

Fnet = 0net

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The complete question is,

A loop of wire has the shape of a right triangle (see the drawing) and carries a current of I = 4.10 A. A uniform magnetic field is directed parallel to side AB and has a magnitude of 1.60 T 55.0 2.00 m (a) Find the magnitude and direction of the magnetic force exerted on each side of the triangle. N directed N directed. Select N directed Select- Select side AC side CB side BA

All we need to do in order to find out the direction is to take into account the sign of the charge. As they are both positive, the particles will repel each other, which can be seen on the following drawing:

Thus, particle q2 will try to push particle q1 to the left

The answer is: -

Answer:

I) 420000J

ii)

Explanation:

(I) so you can use the formula for quantity of heat then substitute the values given

formula-Q=mc∆9

Explanation:

International Bureau of Weights and Measures (BIPM), French Bureau International des Poids et Mesures, international organization founded to bring about the unification of measurement systems, to establish and preserve fundamental international standards and prototypes, to verify national standards

To find the speed of the car when it has traveled 50 meters, we need to use the Work-Energy Theorem and equate the net work done to the change in kinetic energy.

The net work done (W_net) is given by integrating the force (f(x)) over the displacement (x₁ to x₂):

In this case, the force acting on the car is given by f(x) = 5.7x² + 1.5x.

The change in kinetic energy (∆KE) is given by:

Since the car starts from rest (v₁ = 0), the initial kinetic energy (KE₁) is 0.

Using the formula for kinetic energy KE = 1/2 mv², we can express the final kinetic energy (KE₂) in terms of the car's mass (m) and its final velocity (v₂):

According to the Work-Energy Theorem, W_net = ∆KE. Therefore, we can write:

Substituting the given force expression into the integral:

Now we can solve this equation to find the velocity v₂. However, the problem statement does not provide the values of x₁ and x₂, which are necessary to evaluate the integral and determine the velocity. Without those values, we cannot proceed with the calculation.

If you have the values of x₁ and x₂, please provide them, and I'll be happy to assist you further in finding the speed of the car when it has traveled 50 meters.

Kinetic energy or energy of motion is the energy possessed by an object due to its motion. The kinetic energy of an object is defined as the work required to move an object with a certain mass from rest to a certain speed.

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Answer:

gravity is the force by which a planet or another body draws objects towards its Centre. the force of gravity keeps all of the planets in an orbit around the sun.

Explanation:

what is gravity made of?

gravity are made of proposed gravity parts that are made quantum particles which called gravitational anywhere there is gravitation there is gravity like on Earth in the Solar System most importantly in the minisclue infant and intervention universe .

Answer:

The boiling point of liquids always increases when pressure is applied on a liquid. This is because the molecules of a liquid will need more energy to turn into a gaseous state when pressure is applied on that substance.

An offshore wind, option A: blows from land to water, this is why it is also known as land breeze.

The movement of wind from land to a body of water is known as a land breeze or offshore wind. The process goes throughout the night. The land and the ocean both cool as the sun goes down. The land cools down more quickly because it has a lower heat capacity than water.

A low-pressure area develops over the sea as a result of the water's higher temperature than the land. Air rushes from the land to the sea as a result, hence the term "land breeze."

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Answer:

The less mass an object has, the less its gravitational  [force.]

Explanation:

Newton's Law of Gravity states that \(F_G=\frac{Gm_1m_2}{r^{2}}\). The two m values are the objects' masses, G is the gravitational constant, and r is the distance between the objects' centers. Notice how the mass values are in the fraction's numerator? That means increasing the mass of one or both objects increases \(F_G\). That also implies the inverse; decreasing the mass of one or both objects decreases \(F_G\)!

I hope this helps you understand this concept a little more! Have yourself a fantastic day, 'kay?

By 272.7 degrees angle has planet Y rotated through during this time.

The cubes of the semi-major axes of the planets' orbits are precisely proportional to the squares of the planets' orbital periods. According to Kepler's Third Law, as an orbiting planet's radius rises, so does the time of its orbit around the Sun.

Using Kepler's 3rd law, which says that the period of any planet's orbit squared is proportional to the radius of the orbit cubes, we can establish that

(period X / period Y)^2 = (radius X / radius Y)^3

(period X / period Y)^2 = 2^3 = 8

take sq root

period X / period Y = √8 = 2.82≅ 3

this means it takes planet X 2.82≅ 3  times longer to go through one orbit... so planet Y travels 2.82≅ 3  times as far (in its orbit...) as planet X!

This means...

planet Y travels   3 * 90.9  =   272.7 degrees

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Answer:

It is B: Eating an apple.

Explanation: Because eating food gives your body the nutrients and energy it needs.

Answer:

A. NaF and MgS

Explanation:

The reaction equation is given as:

             Na₂S  +  MgF₂  →   2NaF  + MgS

The product of this reaction is  NaF and MgS.

In a double displacement reaction there is an actual exchange of partners to form new compounds. This reaction takes place between ionic compounds.

The driving force for the reaction is:

b. a rope

With the use of the rope, you can pull the object in any direction with the same magnitude which would change the direction but not the magnitude.

Explanation:

I hope this helps, you can ask any questions for clarification

The era of nucleosynthesis lasted approximately 3 minutes. During this time, the universe was hot and dense enough for nuclear reactions to occur, resulting in the formation of light elements such as helium, deuterium, and lithium.

The era of nucleosynthesis lasted approximately 10-10 seconds, which is a very short amount of time. This is the period of the early universe when the conditions were just right for the formation of the first atomic nuclei, including hydrogen, helium, and a small amount of lithium. During this time, the temperature was extremely high and the density was very high as well, allowing for nuclear fusion reactions to occur.

After this brief era, the universe cooled and expanded, making it much more difficult for these fusion reactions to occur and leading to the formation of stars and galaxies. So, to summarize, the long answer is that the era of nucleosynthesis lasted only about 10-10 seconds, but it was a critical period in the early history of the universe.

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Answer:0.060

Explanation:

The mass of the tennis ball is equal to 0.23 Kg.

According to the law of conservation of linear momentum, the sum of the momentum of the bodies which are collided with each other must be equal before and after the collision.

m₁ .u₁ + m₂.u₂ = m₁ .v₁ + m₂.v₂

where m₁ and m₂ is the masses, u₁ and u₂ are initial speed while v₁ & v₂ is their final speed of the collieded objects.

Linear momentum can be defined as the product of the mass times the velocity of that object.

Given, the initial velocity of the baseball is u₁ = 15 m/s

The initial velocity of the tennis ball u₂ = 22 m/s.

The mass of baseball, m₁ =0.15 Kg

From the law of conservation of momentum, find the  mass of the tennis ball:

m₁ u₁ + m₂ u₂ = m₁.v₁ + m₂.v₂

0.15 × 15 + m ×22 = 0.15 × 1.2 + m × 13

2.25 + 22 m = 0.18 + 13 m

9 m = 2.25

m = 0.23 Kg

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The turbine performance/efficiency can be given as :\(\eta_{b,max}=\frac{1}{2} \alpha (1+\frac{V_{r2}}{V_{r1}})\)

The diagram below depicts the complete cycle of various units of a steam turbine. Before entering the turbine unit, the steam is superheated.

Based on thermodynamic principles, the steam turbine operates in parts 3-4 of the Rankine cycle. The high-velocity steam exits the nozzle and is directed towards the turbine rotor blades.

By applying the first law of thermodynamics ,we can obtain an equation for calculating the work produced per unit mass .Assuming that no heat is transferred to the surrounding environment and that changes in kinetic and potential energy are ignored in favour of changes in specific enthalpy, we can write the following formula:

   \(\frac{W}{m}=h_3-h_ 4\)

\(h_3\) and \(h_4\) are the steam enthalpies at the entrance and exit of the turbine unit, respectively. In addition, 'W' and 'm' represent the rate of work produced by the turbine per time unit and the flow rate, respectively.

Turbine efficiency:-

The sum of the moments of applied external forces on a fluid equals the net time variation of angular momentum flux, according to the law of moment of momentum.

\(F_u=m \Delta v_w\)

In the above equation, \(F_u\) is the blade's tangential force, and \(\Delta V_w\)is the difference in tangential velocities at the inlet and outlet.

\(\Delta V w =V w_1 -V w_2\)

The work developed by the turbine is: \(w=mU \Delta v_w\)

where, U is the blade speed and is calculated as:\(U=\omega T\)

Where \(\omega\) and r are the angular velocity and radius of the turbine, respectively.

Blade efficiency is defined as the ratio of work done on the blades to kinetic energy provided to the fluid.

\(\eta_b=\frac{U \Delta V_w}{V_1^2}\)

V1 denotes the absolute inlet velocity.

Stage Efficiency:-

An impulse turbine stage consists of a nozzle set and a moving wheel. The stage efficiency is defined as the ratio of work done in the stage to enthalpy drop in the nozzle.

\(\eta_{stage}=\frac{U \Delta V__w}{\Delta h}\\\\\Delta h=h_2-h_1\)

The final equation gives the nozzle's specific enthalpy drop. According to the 1st law of thermodynamics:

\(h_1+\frac{1}{2}V_1^2=h_2+\frac{1}{2}V_2^2\)

So, assuming V1 is very small,

\(\Delta h=\frac{1}{2}V_2^2\)

Furthermore, stage efficiency is determined using the following relationship:

\(\eta_{stage}=\eta_b \eta_N\)

ηN is the nozzle efficiency, and it is provided by:

\(\eta N=\frac{V_2^2}{2(h_1-h_2)}\)

Maximum stage efficiency may be obtained by putting the following ratio in the statement of blade efficiency:

\(\frac{U}{V_1}=\frac{1}{2}cos \alpha\)

where α is the guide vane angle.

So,

\(\eta_{b,max}=\frac{1}{2} \alpha (1+\frac{V_{r2}}{V_{r1}})\)

Vr1 and Vr2 represent relative velocities at the entrance and outflow. By ignoring blade surface friction, we get:

\(\eta_{b,max}=\alpha\)

It implies that as  \(\alpha\) rises, so does the labor done on the blades. However, because the blade's surface area is reduced, frictional losses are reduced.

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Answer:

lux

Explanation:

I guess because I think I have read it somewhere

The requried measurement unit of luminous flux is lumen (D).

Unit of measurement is defined as every entity having its measures in dimensions, weight, and time. Such as for length we have a meter, for liquid we have liters, and so on.

Here,
The measurement unit of luminous flux is lumen (D). Luminous flux is the measure of the total amount of visible light emitted by a light source per unit of time, which is perceived by the human eye as brightness. It is a measure of the quantity of light energy emitted by a source in all directions per unit of time. Lumen is defined as the amount of light emitted by a light source in a solid angle of one steradian, within a unit of time.

Thus, the requried measurement unit of luminous flux is lumen (D).

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The portal should be placed at 97.50 m in order to intercept the turd at its highest point above the ground.

When a particle is hurled obliquely near the surface of the earth, it travels along a curved path while accelerating continuously in the direction of the planet's center (we assume the particle stays close to the surface of the globe). Such a particle's motion is known as projectile motion, and its route is referred to as a projectile.

Given parameters:

Initial speed of the turd: u = 51 m/s.

Angle of projection θ = 59°

Acceleration due to gravity: g = 9.8 m/s².

So, maximum height obtained by it be:

H = u²sin²θ/2g.

= 51² × sin²59°/(2×9.8) m

= 97.50 m.

Hence,  a portal should be placed at 97.50 m in order to intercept the turd at its highest point above the ground.

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the appropriate section size for the red pine lumber beam with the safety level is grade 2, and the design life is 50 years is 150 mm × 5.44 mm.

Determine the characteristic load:The characteristic load is the permanent uniform load (including self-weight) plus the variable uniform load.

Given ,

the permanent uniform load is 4.1 kN/m

the variable uniform load is 1.0 kN/m

the characteristic load is (4.1 + 1.0) kN/m = 5.1 kN/m.

Calculate the design load:The design load is determined by multiplying the characteristic load by the partial safety factor for loads.

In this case,

the safety level is grade 2

the partial safety factor for loads (γ_f) is 1.4.

the design load is 5.1 kN/m × 1.4 = 7.14 kN/m.

Determine the maximum bending moment:The maximum bending moment occurs at the mid-span of the beam and is given by the equation:

M = (wL^2)/8, where ,

w is the design load

L is the span of the beam

M = (7.14 kN/m × (3.2 m)^2)/8 = 9.14 kNm.

Select an appropriate section size,use the formula: M = (bh^2)/6,

where,

b is the width of the section

h is the height of the section

(b × h^2) = (6 × 9.14 kNm)/(13 N/mm²) = 4.446 kNm/mm².

Since we have one unknown (either b or h), we need to make an assumption about one of them. Let's assume the width (b) is 150 mm.

h^2 = (4.446 kNm/mm²)/(b).

Substituting the assumed value of b = 150 mm,

h^2 = (4.446 kNm/mm²)/(150 mm) = 29.64 mm²/mm.

Taking the square root, we find: h ≈ 5.44 mm.

Therefore, the appropriate section size for the red pine lumber beam is  150 mm × 5.44 mm.

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Answer:

B)Lead is a solid at 310 °C

Explanation:

The melting point of a substance refers to that temperature in which the substance changes state from solid to liquid. The melting point of a substance, which is usually a temperature value, is that actual temperature the change of state occurs.

According to this question, the melting point of Lead (Pb), which is naturally a solid metal, is 327.5°C. This means that LEAD (Pb) will only change to its liquid state at exactly 327.5°C and above. Therefore, at a temperature of 310°C, which is lower than lead's melting point, Lead element will still be a solid.

Answer: The correct answer is B. Lead is a solid at 310

Explanation:

Answer:

What natural disasters could be associated with this storm in coastal regions?

• wave surges

• tides and tsunami.

What would be the best emergency action plan?

• Evacuation of the current residents.

What would be a safe evacuation route if needed?

• in the attachment

Answer:

Natural disasters that could be associated with this storm in coastal regions could include wave surges, tides, and tsunamis. The best emergency action plan under these circumstances would be the evacuation of residents in the at risk areas. The best evacuation routes depend on where residents and/or tourists are coming from. Residents north of I-164 should take 1-64 West, toward Richmond. Residents south of I-264 and oceanfront residents/tourists should take I-264 to 1-64 East, toward Suffolk.

Explanation:

There is no change in direction because the car is moving in a straight path. The magnitude remains unchanged. As a result, the car accelerates at a constant rate.

Although we can refer to an object's motion as linear when it goes in a straight line, that does not imply that its acceleration is zero.

If the velocity is 0 (which is a constant in and of itself), then the acceleration must necessarily be 0 as well.

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Frog belong to the spot 'c'

a branching diagram show the evolutionary relationships among various biological species based upon similarities and differences in their morphological or genetical characteristics.

Hence the frog is correct answer.

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Answer:

scalar Besause it has magnitude but no direction