a boy is to catch a ball which drops vertically from the top of a 14.9-m tower. find the average velocity at which the boy, initially 6.62 m from the base of the tower,

Answer:

is

Explanation:

e

Answer:

The acceleration of an object can be calculated using Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. The equation is:

F = ma

where F is the force, m is the mass, and a is the acceleration.

So, if we know the mass of the object (m = 56 kg) and the force acting on it (F = 800 N), we can calculate the acceleration (a) by dividing the force by the mass:

a = F / m

a = 800 N / 56 kg

a = 14.28 m/s^2

So the acceleration is 14.28 m/s^2

A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks from the spotlight toward the building at a speed of 1.3 m/s. The length of his shadow on the building decreasing when he is 4 m from the building is 0.48 m/s.

An angle is a shape which can be determined by two rays or lines which is a shared terminal. The name "angle" comes from the Latin word "angulus," which means "corner."

The common terminal of the two rays can be known as the vertex and that can be referred to as an angle's sides. The angle in the plane does not always need to be in Euclidean space.

Here the Given values are,

Distance of man from building = x

∴ initially, x = 12

dx/dt = -1.3 m/s

Let, Shadow height = y

Now, we have to

Solve for \(\frac{dy}{dt}\), when x = 4m

From the attached diagram it's clearly seen that the similar triangles have with similar base/height ratios,

\(\frac{2}{12-x} = \frac{y}{12}\\\ y= \frac{24}{12-x} \\\frac{dy}{dt} =\frac{24}{(12-x)^{2}}*\frac{dx}{dt}\)

At x=4,

dy/dt will become,

= 24/(12-x)²× -1.3

Thus, y = - 0.48 m/s.

To know more about angles,

brainly.com/question/28451077

#SPJ1

Convert minutes to seconds and redo his calculation.

The quick response. Atomic clocks are the most precise timekeeping devices we have for measuring the length of time between two events. Atoms in the clocks jump from one energy level to another as a result of the precise frequency at which these clocks emit electromagnetic radiation, such as microwaves.

Time is an illusion, says theoretical physicist Carlo Rovelli, because our simple perception of its flow doesn't match up with physical reality. In fact, much more, including Isaac Newton's depiction of a constantly ticking clock, is illusory, according to Rovelli's claim in The Order of Time.

In an hour, there are 60 minutes. Divide the amount of minutes by 60 to convert it to hours. For instance, 120/60=2 means that 2 hours are equal to 120 minutes.

To know more about microwaves :

https://brainly.com/question/1593533

#SPJ9

Answer:

110 km/h

Explanation:

"Headwind" means, that the velocity of the wind is opposite to the velocity of the airplane. Thus, in order to find the resultant speed, one should subtruct those velocities

The Heisenberg Uncertainty Principle is a relationship between certain types of physical variables like position and momentum, which roughly states that you can never simultaneously.

∆x∆mv ≥ h/4π

The difficulties do the uncertainty principle cause in trying to pick up an electron with a pair of forceps are -

1. So, When the electron is picked by the forceps, the position of the electron is ``localized’ (or fixed), this will render the momentum (P) and uncertainty principle  will make it highly uneffective.

2. It will also shake the electron furiously against the forceps tips that tries to hold the electron tightly.

To know more about Heisenberg uncertainty principle,

https://brainly.com/question/28701015

#SPJ4

Answer:

B is your answer

Explanation:

C, D, and A are true and protons are located inside the nucleus and electrons are located outside the nucleus which means B is your answer.

Answer:

Touka Kirishima <3

Explanation:

Answer:

juuzou

Explanation:

he bad##s

An object becomes electrically charged when there is a transfer of electrons between two objects. Electrons are negatively charged particles that orbit the nucleus of an atom. When two objects come into contact with each other, some electrons may move from one object to the other. The object that loses electrons becomes positively charged, while the object that gains electrons becomes negatively charged.

This transfer of electrons can also occur without direct contact between the objects. For example, if a charged object is brought close to a neutral object, the electrons in the neutral object may be attracted or repelled by the charged object. This can cause the electrons in the neutral object to move around, resulting in a separation of charges and the object becoming charged.

Another way an object can become charged is through the process of induction. If a charged object is brought near a neutral object, it can induce a separation of charges in the neutral object. This happens because the charged object creates an electric field that attracts or repels electrons in the neutral object. The result is a separation of charges, with one part of the object becoming positively charged and the other part becoming negatively charged.

The necessary factors to turn collective action into a social movement include:

A common social or political purpose: A social movement typically arises when a group of individuals come together with a shared goal or cause. They identify a social or political issue that they believe needs to be addressed or changed.

Violation of social norms: Social movements often emerge in response to perceived injustices or violations of existing social norms. These violations can be related to issues such as inequality, discrimination, or injustice. The recognition of such violations can mobilize individuals to take collective action.

Institutionalized organization: To sustain and effectively mobilize a social movement, it often requires an institutionalized organization. This can be in the form of formal structures, such as organizations, groups, or networks, that provide the necessary coordination, leadership, and resources for the movement's activities.

Know more about social movement here:

https://brainly.com/question/10230523

#SPJ11

Answer:

A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure. A liquid is made up of tiny vibrating particles of matter, such as atoms, held together by intermolecular bonds.

Answer:

The energy used in the pendulum is the initial Potential (Mechanical) Energy, P.E. given to the Clay ball attached to the inclined and extended string by virtue of its elevated position in relation to the rest position (lower state)

The swinging of the pendulum is brought about by the dynamic equilibrium between the initial potential energy, P.E. and the Kinetic Energy, K.E., of the pendulum when it is in motion

The (total) Mechanical Energy, M.E. of the ideal pendulum is constant at all times during the motion of the pendulum and it is given by the following formula;

M.E. = P.E. + K.E.

At the top of the swing, P.E. is maximum and K.E. is zero

Similarly, at the mid (lowest) point in the swing, instantaneously, P.E. is zero and K.E. is maximum

Explanation:

Answer:

C

Explanation:

you cannot any other thing if you don't even know what you are designing.

The first step in the technological design process is to define a need or problem, therefore the correct answer is option C.

There are mainly five stages of technological design,

Identifying the issue that needs to be solved is the first step in every problem-solving process.

The second stage is to imagine; during this phase,

The chosen product from the imaging stage is planned in the third stage.

Testing, evaluating, and modifying the product are the fourth stage.

The sharing of your solution is the fifth step. To gather comments, discuss your ideas with others, and enhance your product,

Technological designing is a lengthy process that involves a number of steps but identifying the problem we are going to is the most important step among all of the steps because a wrong approach to the problem would lead to faulty design in the later stages.

Thus, the first step in the technological design process is to define a need or problem, therefore the correct answer is option C.

To learn more about technological design from here, refer to the link;

brainly.com/question/2028919

#SPJ2

The specie I have chosen is goat. The description is given below

The Diseases of Goats are

Among the disease, the one i will emphasize on is Rabies.

The causes of rabies in goat: This is due to a goat been infected  from a bite gotten from another infected animals.

The risk factor of rabies in goat: risk factor of rabies in goat is that the animal may or will looks ill or displays some kind of abnormal behavior.

The symptoms of rabies in goat: The Symptoms in goats when they have rabies is aggressive behavior, bleating too often, and salivation, depression, weakness, and others.

The treatment of Rabies: There is no commercial vaccines that has been approved for use in goats, but vaccination is said to be the right recommendation and it is the one that most veterinarians for rabies use to prevent rabies on goats.

The cases of Rabies attack is said to be very fatal in a lot of cases, and usually occur within 3-10 days after the symptoms has appeared. The right and proper measures should be taken before and after the goat is bitten or attacked, this rabies attack in goat can be prevented in a lot of cases.

The ways farmer or rancher should keep healthy herd or flock healthy are:

Learn more about Rabies from

https://brainly.com/question/8289237

Given that spring constant, k = 100 N/m and displacement, x = - 5mm = - 0.005 m

The formula of restoring force according to Hooke's law,

Substituting the values, we get

Thus, the force is 0.5 N

Answer:

Explanation:

a. The buoyant force on the rock is 2 N.

b. The scale reading when the rock is suspended beneath the surface of the water is 18 N.

c. The scale reading when the rock rests at the bottom of the container is 20 N.

Florida typically has a much smaller temperature swing than a dry desert environment, where the climate will typically show wide temperature swings on a daily basis, from very cold to very hot because of the water surrounding Florida.

The correct option is B.

The State of Florida is a peninsula, which means it is surrounded on three sides by water: the Gulf of Mexico, the Atlantic Ocean, and the Straits of Florida.

Hence, because of the waters surrounding Florida, it has fewer temperature swings.

Learn more about Florida:  https://brainly.com/question/2685941

#SPJ1

a) Work needed to stretch the spring from 12 m to 14 m is 8 J. b) Force of 64 N will keep the spring stretched by 16 m beyond its natural length.

When spring is stretched or compressed, such that length changes by an amount x from its equilibrium length, then it exerts force F = -kx in a direction towards its equilibrium position.

(a) Potential energy, U = (1/2)kx^2

k is spring constant, and x is displacement from natural length of spring.

W = U = (1/2)k(9-6)^2 = (1/2)k(3)^2 = (9/2)k

Therefore, k = (2/9)W = (2/9)(18 J) = 4 J/m.

W = (1/2)k(14-12)^2 = (1/2)(4 J/m)(2 m)^2 = 8 J

So the work needed to stretch the spring from 12 m to 14 m is 8 J.

(b)F = kx

F is force, k is spring constant, and x is displacement from the natural length of spring.

x = F/k = 64 N / 4 J/m = 16 m

Therefore, a force of 64 N will keep the spring stretched by 16 m beyond its natural length.

To know more about spring, refer

https://brainly.com/question/23885190

#SPJ1

Therefore, the minimum age of the charcoal is 21070 years. It is important to note that this is just an estimate, and the actual age could be slightly older or younger depending on various factors such as contamination and measurement error.

The fact that the charcoal contains less than 1/1000 the normal amount of carbon-14 indicates that a significant amount of time has passed since the campfire was last used. To find the minimum age of the charcoal, we can use the fact that the amount of carbon-14 remaining in a sample decreases exponentially with time. Specifically, after n half-lives, the amount of carbon-14 remaining is 1/2^n times the original amount.
Using the given half-life of carbon-14 (5730 years), we can set up the following equation:
1/1000 = (1/2)^(n/5730)
To solve for n, we can take the logarithm of both sides:
log(1/1000) = (n/5730) log(1/2)
Solving for n, we get:
n = 21070 years

to know more about archeology visit:

https://brainly.com/question/31029490

#SPJ11

The distribution of charges in an electric field is determined by the properties of the electric field and the objects or charges involved.

In an electric field, charges are distributed in a way that depends on the nature and strength of the field, as well as the properties of the objects involved.

In a uniform electric field, charges are distributed uniformly across the surface of a conductor, such that the electric field inside the conductor is zero. This is known as electrostatic shielding.

In a non-uniform electric field, charges are distributed such that the electric field is perpendicular to the surface of the conductor at every point. This is known as the "normal field".

In a charged object placed in an electric field, the charges in the object may rearrange themselves to create a net electric field inside the object that opposes the external electric field. This can result in a reduction in the net electric field inside the object.

Learn more about charge distribution at: https://brainly.com/question/28027633

#SPJ1

The power output of  2.00 kg object is accelerated uniformly from rest to 3.00 m/s while moving 1.5 m across a level frictionless surface is 24.09 watts.

In science, power is the time required to do work or provide energy, expressed as work done W or energy transferred divided by the time interval t - or W/t. A fixed amount of work can be done for a long time with a low-powered engine, or for a short time with a high-powered engine. The unit of power is work (or energy) per unit of time. Such as foot pounds per minute, joules (or watts) per second, and ergs per second. Force can also be expressed as the product of the force required to move an object and the object's velocity in the direction of the force. If the magnitude of the force F is measured in pounds and the velocity ν is measured in feet per minute, then the power is equal to Fν foot pounds per minute.

Given,

Mass of object (m) = 2.00 kg

Distance covered (s) = 1.5 m

Velocity of object (v) = 3.00 m/s

For calculation of acceleration:

v² = u² + 2as

3² = 0 + 2 × a × 1.5

9 = 3a

a = 2 m/s²

For calculation of time:

s = ut + ¹/₂at²

1.5 = 0 × t + ¹/₂ × 2 × t²

1.5 = t²

t = 1.22 sec.

For calculation of gravitational force:

F = mg

F = 2 × 9.8

F = 19.6 N

For calculation of work done:

W = F × s

W = 19.6 × 1.5

W = 29.4 J

For calculation of power output:

P = W/t

P = 29.4/1.22

P = 24.09 watts

To know more about power output, visit:

https://brainly.com/question/287674

#SPJ1

Answer:

Jesseca wanted to create a material that reflected most of the light that fell on it.

Explanation:

Plato Answer

Answer:

Jesseca wanted to create a material that reflected most of the light that fell on it.

The magnetic flux passing through defined by 0.02 < r < 0.03 m and 0 < z < 3 is `8π × 10⁻⁷ Wb`

Permeability of free space is given by `μ0 = 4π × 10⁻⁷ T m A⁻¹`

Formula used to calculate the magnetic flux passing through the defined area is as follows:

`ΦB = μ0 * I * (Θ2 - Θ1) / 4π`

Where

I = current

Θ1 = lower limit of angle

Θ2 = upper limit of angle

For the given problem, current filament is along the z – axis in the direction, thus the angle Θ1 and Θ2 will be 0 and 2π respectively.

The distance between 0.02 m and 0.03 m is 0.01 m, the mean radius of the area will be`(0.03 + 0.02) / 2 = 0.025 m`

The formula for calculating the magnetic flux through the defined area is`ΦB = μ0 * I * (Θ2 - Θ1) / 4π`

From the question, we know that;:

μ0 = `4π × 10⁻⁷ T m A⁻¹`

I = 4A

Θ1 = 0

Θ2 = 2π

The formula becomes`ΦB = (4π × 10⁻⁷) * 4 * (2π - 0) / 4π``ΦB = 8π × 10⁻⁷ Wb`

Learn more about magnetic flux at:

https://brainly.com/question/13035557

#SPJ11

Answer:

The more mass a body has the more inertia it has. If the roller coaster is moving, it will want to keep moving, along the direction of motion, unless something causes it to speed up or slow down. This resistance of the moving roller coaster to changing its velocity is another example of its inertia.

Answer:

the weight and force of the roller coast and the speed of when it goes up and down

The type of wave that requires a material medium through which to travel is Sound. The correct answer is option A.

Sound waves are mechanical waves, which means they require a medium (such as air, water, or solids) to travel through. In contrast, television, radio, and X-ray waves are all examples of electromagnetic waves, which can travel through a vacuum and do not require a material medium.

Television (option B), radio (option C), and X-ray (option D) waves are all examples of electromagnetic waves that can travel through vacuum and do not require a material medium. Therefore the correct answer is A: Sound.

More on waves: https://brainly.com/question/15591316

#SPJ11

Answer:

Part 1: Matter can neither be created nor destroyed thus the product is always equal to the mass of reactants

Part 2: Conversation of Mass

Explanation:

:D

Answer:

Approximately \(1.5\; {\rm s}\).

(Assumptions: \(g = 9.81\; {\rm m\cdot s^{-2}}\); air resistance on the volleyball is negligible.)

Explanation:

Under the assumptions, acceleration of the volleyball would be \(a = (-g) = (-9.81)\; {\rm m\cdot s^{-2}}\) during the entire flight. (This value is negative since the ball is accelerating downwards- toward the ground.)

By the time the volleyball hits the ground, the volleyball would be at a position \(2.0\; {\rm m}\) below where it was launched. In other words, the (vertical) displacement of the volleyball during the entire flight would be \(x = (-2.0)\; {\rm m}\). (Negative since the ball is below where it was launched.)

Apply the SUVAT equation \((v^{2} - u^{2}) = 2\, a\, x\) to find the velocity of the volleyball right before hitting the ground. In this equation:

Rearrange this equation and solve for the velocity right before landing, \(v\). Note that because \(v\!\) is raised to the power of \(2\) in \((v^{2} - u^{2}) = 2\, a\, x\), both \(v = \sqrt{u^{2} + 2\, a\, x}\) and \(v = -\sqrt{u^{2} + 2\, a\, x}\) could satisfy this equation. However, \(v\!\!\) needs to be negative since the volleyball would be travelling downwards before reaching the ground.

Therefore, right before reaching the ground, velocity of the volleyball would be:

\(\begin{aligned} v &= -\sqrt{u^{2} + 2\, a\, x \\ &= -\sqrt{(6.0)^{2} + 2\, (-9.81)\, (-2.0)} \; {\rm m\cdot s^{-1}} \\ &\approx (-8.67)\; {\rm m\cdot s^{-1}}\end{aligned}\).

In other words, velocity of this volleyball has changed from \(u = 6.0\; {\rm m\cdot s^{-1}}\) (upwards) to \(v \approx (-8.67)\; {\rm m\cdot s^{-1}}\) (downwards) during this flight. Divide the change in the velocity \((v - u)\) by the rate of change in velocity \(a = (-9.81)\; {\rm m \cdot s^{-2}}\) to find the duration of this flight:

\(\begin{aligned}t &= \frac{v - u}{a} \\ &\approx \frac{(-8.67) - 6.0}{(-9.81)}\; {\rm s} \\ &\approx 1.5\; {\rm s}\end{aligned}\).

The magnetic field tilts of Earth and Uranus are considered to be the most unusual when compared to other celestial bodies in our solar system. Earth's magnetic field tilts at an angle of approximately 11 degrees with respect to its rotational axis, which is quite significant. The magnetic field is generated by the motion of molten iron in the Earth's outer core, which creates a magnetic dipole that is tilted with respect to the planet's rotation axis.

Uranus, on the other hand, has an extremely tilted magnetic field that is almost perpendicular to its rotational axis. This is believed to be due to the planet's unique orientation, as Uranus rotates on its side compared to the other planets in our solar system. The magnetic field is thought to be generated by a layer of electrically conductive fluids deep within the planet's interior, which may be influenced by the unusual orientation of Uranus.

Overall, the magnetic field tilts of Earth and Uranus are intriguing and unique in their own ways, providing valuable insights into the magnetic processes that occur within these celestial bodies.

to know more about planet's rotation axis. click this link

brainly.com/question/31913445

#SPJ11

Answer:

A valence number of 1 means that an alement will generally react to lose one electron to obtain a full outer shell.

Group two elements are assigned a valence number of 2. A valence number 2 means that a group two elements will generally react to lose two electrons to obtain a full outer shell.

Explanation:

Hope it helps

When standing on a train accelerating at 0.30 g, there is an effective force acting on you due to the acceleration. This force is equivalent to the force that would be experienced by an object with mass m = your mass under the influence of gravity and this force is resisted by the static friction force:

F = m * a

where a is the acceleration of the train and g is the acceleration due to gravity (approx. 9.81 m/s^2).

To avoid sliding on the floor of the train, the static friction force between your feet and the floor must be greater than or equal to the force due to the acceleration of the train. Therefore, we have:

f_s >= m * a

where f_s is the static friction force.

The maximum static friction force that can act between your feet and the floor is given by:

f_s = μ_s * N

where μ_s is the coefficient of static friction between your feet and the floor, and N is the normal force acting on your feet.

Since you are standing still relative to the train, the normal force acting on your feet is equal to your weight, which we can express as:

N = m * g

Substituting this into the expression for the maximum static friction force, we get:

f_s = μ_s * m * g

Substituting this expression for f_s into the inequality above, we get:

μ_s * m * g >= m * a

Simplifying this expression, we get:

μ_s >= a / g

Substituting a = 0.30 g and g = 9.81 m/s^2, we get:

μ_s >= 0.30

Therefore, the minimum coefficient of static friction that must exist between your feet and the floor to avoid sliding on the train is 0.30.

Learn more about static friction:

https://brainly.com/question/22438157

#SPJ11