a baseball bat hits the ball with variable force. the ball weighs 0.145 kg and comes toward and (after hit) away from the batter both with 40 m/s, in opposite directions. find the maximum force fmax from the bat.

The given equation is (x+8)²-7=0 and is said to be round to two decimal places. The solution is said to be entered from least to the greatest that is -10.65 and -5.35.

The equation with its highest degree as 2 is called a quadratic equation. We get two solutions for it when we solve it.The quadratic equation is given here as (x+8)²-7=0.

Let us solve the above equation,

(x+8)²-7=0

(x+8)²=7

x+8= ±√7

x= -8 ±√7

The two values of x are √7-8, -8 -√7.

√7-8= -5.35

-8 -√7= -10.65

Thus, the solutions from least to the greatest are -10.65 and -5.35.

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Answer:

Explanation:

The work is equal to the change in kinetic energy:

A = Ek - Ek₀

Given:

V₁ = 10 m/s

V₂ =  20 m/s

V₃ = 20 m/s

V₄ = 30 m/s

_____________

A₃₄ / A₁₂ - ?

A₁₂ = m·V₂²/2 - m·V₁²/2 = (m/2)·(V₂² - V₁²)

A₃₄ = m·V₄²/2 - m·V₃²/2 = (m/2)·(V₄² - V₃²)

A₃₄ / A₁₂ = (V₄² - V₃²) /  (V₂² - V₁²)

A₃₄ / A₁₂ = (30² - 20²) /  (20² - 10²)

A₃₄ / A₁₂ = (900 - 400) /  (400 - 100) = 500 / 300 ≈ 1.67

The work of A₃₄ is 1.67 times more than the work of A₁₂

The amplitude of subsequent motion is 0.028 m.

Mass of a given block= 0.90 kg  

Spring constant (k) of a spring = 320N/m

Weight of the given block = F = mg = 0.90 × 9.81 = 8.83 N

F/k = x which is the compression of spring (amplitude) and is equal to 8.83/320 = 0.028 m  

When an object is present in a gravitational field, it has or can acquire gravitational potential energy, which is the energy that results from a change in position. Gravitational potential energy is energy that has a connection to gravitational force or gravity. An example of a system possessing gravitational potential energy is water stored in a dam.

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The gravitational force on one sphere due to the three of square is 718.87 ×10⁻¹¹N

Gravitational force is the attraction force exerted between all the masses existing in the universe.

Mass of the spheres = m = 7.5 kg

Length of the square side = d = 0.8 m

Due to the square's three corner there will be upward , right and diagonal three forces acting on the system,

Fupward = G(m²/d²)

Fright =  G(m²/d²)

Fdiagonal = G (m²/(√2d)²)cos45°+ G (m²/(√2d)²)sin45°

here G is the Gravitational force constant which has the value of 6.67 ×10⁻¹¹ Nm²/kg².

To calculate the force on the left sphere in the lower left corner. From the symmetry of the problem the net forces in the x and y direction will be the same and θ = 45°

Therefore, the force will be,

Fx = Fright + Fdiagonal

Fx =  G(m²/d²) +G (m²/(√2d)²)(1/√2)

Fx = G(m²/d²)[(1+(1/2√2)]

Also Fy = Fx =G(m²/d²)[(1+(1/2√2)]

By the Pythagorean combination of the two component forces , due to symmetry the the net force will be along the diagonal of the square,

F = √Fx +Fy= Fx√2

F = G(m²/d²)[(1+(1/2√2)]√2}

F = (6.67 ×10⁻¹¹ Nm²/kg²)(7.5kg)²/(0.8m)²[(1+(1/2√2)]√2}

F = 718.87 ×10⁻¹¹N

The magnitude of the gravitational force exerted on one sphere by the other three is 718.87 ×10⁻¹¹N and the direction of the force will be towards the sphere.

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The answer is c.Evaporation

Answer:

C) Evaporation

Explanation:

Think of it like eVAPORation

The frequency of radiation that has a wavelength of 5.23 x 10^-4 m is

 57.36 x 10¹⁰ Hz.

Light's wavelength and frequency are inversely proportional to one another.

Light waves with the highest frequencies have the shortest wavelengths, and those with the lowest frequencies have the longest wavelengths.

Formula:

Speed of light = wavelength × frequency

c = λ × f

f = c / λ

The speed of light =  3×10⁸ m/s

a wavelength of radiation = 5.23 x 10⁻⁴m

To calculate the frequency of the radiation :

f = c / λ

using values of c and λ  we get,

f = (3×10⁸ m/s) / ( 5.23 x 10⁻⁴m)

f = 0.5736 x 10¹² Hz

f = 57.36 x 10¹⁰ Hz

The frequency of radiation that has a wavelength of 5.23 x 10^-4 m is 57.36 x 10¹⁰ Hz.

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Answer:

insulation

Explanation:

they use fur to trap a layer of heat next to its skin and reduce heat transfer

think of it like a house, a closed environment/system and it traps warmth inside and it cant get out. or like a microwave, when you open it you can feel the heat releasing.

All three experience the same uboyant force.

What is buoyant force?

Upthrust, often known as buoyancy, is an upward force applied by a fluid against the weight of an object that is partially or completely submerged. The weight of the fluid on top causes pressure in a fluid column to rise with depth.

All three objects experience the same buoyant force because their volumes are equal the buoyant force on an object in a liquid depends on the volume of the submerged object, the density of the liquid, and the acceleration caused by gravity but not on the density of the object.

Hence, all will experience the same buoyant force.

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The amount of fluid that moves past a point in area A per unit of time is known as the flow rate.

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Paul has a very small budget, but he want to do some business job. The channel he could try in his situation is C. Flea Market.

Flea Market is a market where multiple vendors gather to sell their products. Many flea markets offer both new or secondhand goods. Though open-air markets were once the norm, today's flea markets may take place indoors, outdoors, or both. Many people with low budget and want a simple way of selling their goods use this kind of market. They don't need to rent such a permanent place. They also do not need to share their profit from sales to service providers like if they did it in E-commerce.

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A disconnecting means is a device, or group of devices, or other means by which the conductors of a circuit can be disconnected from their source of supply.

This is the definition given to disconnecting means by NEC. NEC stands for National Electrical Code. It is a standard to safe installation of electrical wiring and electrical equipment. It is created to provide safety for people from electrical hazards.

A switch is an example of disconnecting means. A disconnecting means isolates the service panel from the source of utility power. The main circuit breaker on a service panel is another form of disconnecting means.

Therefore, a disconnecting means is a device, or group of devices, or other means by which the conductors of a circuit can be disconnected from their source of supply.

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46 °C is the outlet temperature of the pump.

Temperature is the measure of hotness or coldness expressed in terms of any of numerous scales, which includes Fahrenheit and Celsius.

Temperature shows the path wherein warmness power will spontaneously go with the flow i.e., from a hotter frame to a chillier body.

calculation:-

PT = PT2

T2 = PT/P2

= 0.1 × 298/5

= 47°C

The pressure of a given amount of gas is without delay proportional to the temperature at a given quantity. When the temperature of a gadget is going up, the pressure additionally goes up, and vice versa. the connection among strain and temperature of a fuel is said through the Gay-Lussac's law.

The pressure law states that for a constant extent of fuel in a sealed box the temperature of the gas is directly proportional to its strain. this could be without problems understood by visualizing the particles of gasoline inside the field moving with a more energy when the temperature is increased.

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The velocity of the projectile when it is shot from the gun is 3.91 m/s.

We have,

Spring constant = 12.0 n/m

The spring is compressed by 8.00 cm = 0.08 m

Mass = 5.00 gram = 0.005 kg

The potential energy that occurs in the spring is elastic potential energy.

PE = ½ kx²

= ½ (12) (0,08)²

= 0.0384 J

The kinetic energy of the two objects after the collision is equal to the potential energy of the springs.

So,

PE = KE

0.0384 = ½ (0.005) (v)²

0.0384 = 0.0025 v²

v² = 15.36

v = 3.91 m/s

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289.53 newton is the force acting on the 25.22 kg object accelerating at the rate of 11.48m/s²

From the Newton's second law, force is expressed as;

F = m × a

Where m is mass and a is acceleration.

Given the data in the question;

To determine the force acting on the object, plug the given values into the Newton's formula above.

F = m × a

F = 25.22 kg × 11.48 m/s²

F = 289.53 kgm/s²

F = 289.53 N

Therefore, the force acting on the object is 289.53 N.

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An ideal solenoid has an inductance of 6.8 mh. to generate an EMF of 2.6 v, The current should change at a rate of 2.62 * [tex]10^{-3}[/tex] A / second

induced EMF in a solenoid = -L * (di/dt)

∈ = -L * (di/dt)

di/dt = - L / ∈

       = - 6.8 * [tex]10^{-3}[/tex] / 2.6

       = - 2.62 * [tex]10^{-3}[/tex] A / second

The current should change at a rate of 2.62 * [tex]10^{-3}[/tex] A / second

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More energy is required to walk in the sand than to walk on a hard surface is Option C. almost twice.

Energy is the quantitative belongings that are transferred to a body or to a bodily machine, recognizable in the overall performance of work and inside the shape of heat and light. power is a conserved quantity—the law of conservation of energy states that electricity can be transformed in form, however not created or destroyed.

Strength exists in many extraordinary bureaucracies. Examples of these are mild power, warmness electricity, mechanical strength, gravitational power, electric power, sound strength, chemical energy, nuclear or atomic electricity, and so on. every form can be transformed or changed into the opposite form.

Energy is so important in our everyday lives because it's far a simple human want. We use power not the handiest warmth our human-made structures however we use it to cool them as well. strength is essential for buying up away from the bed, strolling down the road, or maybe lifting your finger.

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The telescope in space that allowed astronomers to find thousands of exoplanets and exoplanets was called The Kepler space telescope.

Telescope: a tool for creating magnified pictures of far-off objects. The telescope is without a doubt the most significant research tool in astronomy. It offers a way to gather and examine radiation coming from astronomical objects, even those at the edge of the cosmos.

The Kepler space telescope discovered hundreds of exoplanets and exoplanet candidates during the course of its four years of photometric surveys. The confirmation and characterization of hundreds of multi-planet systems via transit timing variations are one of Kepler's biggest legacies (TTVs).

Therefore, the telescope in space that allowed astronomers to find thousands of exoplanets and exoplanets was called The Kepler space telescope.

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Answer:

The speed of the object is 9.8 meters per second after one second of free fall.  In that one second, the object travels 4.9m.

Explanation:

On Earth, acceleration due to gravity is 9.8[tex]\frac{m}{s^2}[/tex].  Use kinematic equation #1 to find the time it takes this object to achieve the given speed (v).

[tex]v=v_0+at\\a=9.8\frac{m}{s^2}\\v_0=0\frac{m}{2}\\v=9.8\frac{m}{s}\\9.8\frac{m}{s}=0.0\frac{m}{s}+(9.8\frac{m}{s^2})t\\t=\frac{9.8\frac{m}{s}}{9.8{m}{s^2}}\\t=1 s[/tex]

This is intuitive.  The velocity of an object in free fall gains 9.8[tex]\frac{m}{s}[/tex] per second unless acted upon by an outside force.

To find how far the object has fallen, insert the given and derived values into kinematic equation #2.

[tex]\Delta y=(\frac{v+v_0}{2})t\\\Delta y=(\frac{9.8\frac{m}{s}+0.0\frac{m}{s}}{2})(1 s)\\\Delta y=4.9m[/tex]

Hope that helps.

The average magnitude of the friction force the bullet experienced while it traveled through the bag is 12.375 N.

Energy conservation is the decisions and practices to use less energy. Turning off lights when leaving a room, unplugging appliances when not in use, and walking instead of driving are examples of energy conservation. To solve this problem, we can use the law of conservation of energy. We know that the bullet he enters at 39 m/s and exits at 27 m/s, losing some energy. This can be modeled by the energy equation of motion. "U" is the energy lost when the bullet passes through the bag. Then, solving for U, we find that the bag is 48 cm thick and F * d = W by rearranging:

F = 12.375 N

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The negative impact of polyurea is It needs to be reapplied to surfaces frequently. Option D.

Studies have shown that polyurea coatings can increase the deflection of steel components, especially when applied to the exterior facing the blast. Polyurea is a commonly used polymer in moisture-resistant coating systems. Polyurea does not emit CO2 or other harmful gases during manufacturing or use.

Basic components can be manufactured in a climate-neutral manner using renewable energy allowing timely action to be taken regarding the ecological footprint as well. Cured polyurea has a high glass transition temperature and heat distortion temperature, but will burn when exposed to an open flame. It will self-extinguish when the flame is removed. Polyurea coatings provide a fast-curing durable flexible protective barrier that prevents water damage and harmful chemicals from destroying virtually any structure.

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The work done when a spring is stretched from 0 to 40cm is 4J.

What is work done?

Work done is the magnitude of force multiplied by displacement of an object. It is also the amount of energy transferred to an object when work is done on that.

The work done on the spring to stretch to 40cm is,

F = kx

where F is force, k is force constant.

k = F / x = 10 N / 20 * 10^-2 m = 50 N/m

W = 0.5 * k * (x)^2

where W = work done, k = force constant.

W = 0.5 x 50 x (40 x 10^-2)^2 = 4 J.

Therefore, the work done on the spring when it is stretched to 40cm is 4J.

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The velocity of the house fly of mass 1.2×10⁻⁵ kg, with a kinetic energy of 0.019 J is 56.27 m/s

Velocity can be defined as the ratio of displacement to time.

To calculate the velocity of the house fly, we use the formula of kinetic energy below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1 and solve for v

Hence, the velocity of the house fly is 56.27 m/s

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Speed = Wavelength x Wave Frequency.

Wavelength is measured in meters and frequency is measured in hertz, or waves per second. Therefore, wave velocity is expressed in meters/second, which is the SI unit of velocity. Wavelength is the distance between identical points in adjacent cycles of a waveform signal propagating in space or along a wire.

For wireless systems, this length is usually expressed in meters centimeters, or millimeters. Wavelength can be defined as the distance between two consecutive peaks or valleys. Measured in the direction of the wave. The wavelength of light is an important property that determines the properties of light. Red light has a different wavelength than blue light and green light has a different wavelength from both.

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A 1.7 m tall weightlifter holds a 780 n barbell above their head. 1326 J work is being done on the bar .

work done = force * displacement

force = 780 N

displacement  = 1.7 m

work = 780 * 1.7 = 1326 J

1326 J work is being done on the bar

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The question is incomplete. The complete question is attached.

Figure 3 is the right answer. The rods in the figure could be in static equilibrium if an additional force is applied at the center of mass of the rod. Because in this case net force and net torque on the rod are zero.

A static equilibrium is a state of an object when all of its parts are at rest and there is no resultant force on it. All the forces acting on an object are in balance and it is not moving with respect to the relative plane. A static equilibrium stops an object from moving. As all the forces balance each other torque acting on an object is also zero.

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Answer: This happens because the mechanism by which increasing Solar luminosity causes atmospheric CO2 to decline is temperature dependent.

Explanation: Increasing solar luminosity raises the temperature of the planet, increasing the rate of weathering, which exposes crustal rock to the atmosphere. Atmospheric carbon dioxide reacts with that exposed rock to form carbonate minerals, which removes the CO2 from the atmosphere.

This in turn lowers the greenhouse effect and lowers the planet’s temperature, maintaining an equilibrium temperature despite the increased solar luminosity.

A negative feedback loop.

But because solar luminosity is in fact greater, Earth cannot cool to BELOW its prior equilibrium and thus a snowball Earth cannot really occur by this mechanism alone.

But once CO2 is sufficiently exhausted from the atmosphere such that further lowering it levels no longer decreases the greenhouse effect, the temperature buffer effect ends, and Earth’s temperature starts to rise.

Once it rises past a certain point, carbonate minerals are no longer stable. Exposed bedrock no longer reacts with atmosphere CO2. Instead, the REVERSE happens. All the previously made carbonate minerals now decompose and RELEASE CO2 back into the atmosphere.

The greenhouse effect now increases despite the Earth already being warmer, making it even warmer.

A POSITIVE feedback loop.

Which in turn makes the carbonate minerals even more unstable, which increases the CO2 release rate even more, which increases the temperature even more.

Thus a runaway greenhouse effect commences.

Explanation:

Electric force or electrostatic force is the force between two or more charged particles.It can be attractive or repulsive because two similar charges repel each other and opposite charges attract each other.For instance a positive and a positive charge will repel each and a positive and a negative charge will attract each other.

Meanwhile gravitational force is attraction between two bodies(two masses) due to gravity.They always attract each other.The force of attraction by gravity us dependent on sqaure of distance between the two bodies and the product of their masses.

The overall sizes of objects traveling at relativistic speeds are smaller.

The term "relativistic speed" describes the rate at which relativistic effects are important for the intended accuracy of measurement of the phenomenon being observed. The differences between values determined by models that take relativity into account and those that do not are known as relativistic effects. Velocity, rapidity, and celerity are all adjectives that have a similar meaning. Speed is a scalar since it is the size of the velocity vector, or four-velocity in relativity and three-velocity in Euclidean space. Average speed is how speed is objectively determined, although modern, widely used equipment can estimate speed over extremely short time intervals and get very near to instantaneous speed. Cosine error, which happens in speed detection systems when only one scalar component of the three-velocity is measured, and the Doppler effect, which could affect

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The pressure at the bottom of the column is 921.948 Nm⁻²

Pressure is the force applied perpendicular to the floor of an object in keeping with the unit region over which that pressure is shipped. Gauge strain is the strain relative to the ambient strain. diverse devices are used for a specific pressure.

A simple example of stress may be visible via conserving a knife to a bit of fruit. if you hold the flat part of the knife against the fruit, it may not cut the floor. The force is spread out of a large place (low strain).

It is for the ratio of the force implemented to the surface area over which the pressure is applied. we will outline stress as: The pressure applied perpendicular to the surface of an item according to the unit region over which that force is shipped.

Calculation:-

pressure = ρgh

                = 9.8 × 9.8 × 9.6

                 = 921.948 Nm⁻²

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