A body weighing 350N runs up a flight of stairs consisting of 10 steps each of 5m height in 5 sec.What is the power of the body?

Answer:

Work out the change in velocity for you given time.

Calculate the change in time for the period you are considering.

Divide the change in velocity by the change in time.

can increase the velocity of the object, decrease the velocity of the object, or change the direction of the velocity of the object.

Explanation:

hope this helped have a great day!

A tennis ball following a parabolic trajectory without air resistance has two forces acting on it; gravity downward and a force keeping it moving forward this statement is false.

Objects fired into the air and traveling in that direction are referred to as projectiles. After the initial force that drives it, an object only perceives gravity. The projectile's route is the path that the object takes as it moves. Projectile motion can take one of three main kinds. horizontal projectile motion an oblique projectile motion. the trajectory of a missile moving upward.

The following are the key elements influencing projectile motion:

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According to the octet rule, if an atom has fewer than 8 electrons in the outer most energy level, it will react with other nearby atoms to give, receive or share electrons until it has a full outer shell.

The octet rule refers to the tendency of atoms to prefer eight electrons in their valence shell.

If the atom has less than 8 electrons, the atoms tend to react to form more stable compounds.

The discussion of the octet rule does not consider d or f electrons. It is useful for main group elements because only s and p electrons participate in the octet rule.

Atoms are reacted to be as stable as possible. Complete octets are very stable because all orbitals are full. Since atoms with higher stability have less energy, reactions that increase the stability of atoms release energy in the form of heat or light.

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Answer:

It will react with other nearby atoms to give, receive or share electrons until it has a full outer shell.

Explanation:

im prolly really late for this one but lol oh well

Answer:

UY Scuti has in between 7 and 10 Sun's masses, then, it is not possible this star becomes a black hole.

Explanation:

Consider that only stars with masses in between 30 and 70 Sun's masses could be black holes. This is because only stars with enough mass have the enough gravitational force to overcome the radiation pressure of the star and thus cause the star to collapse and become a black hole.

Hope this Helps!

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\(-Nature-\)

The seagull will fly 134 meters in 10.0 seconds if its velocity remains constant at 13.4 meters per second.

The pace at which an object's position changes about a frame of reference is known as its velocity, and it depends on time. A specification of a thing's speed and direction of motion is what velocity is.

The various forms of velocities include uniform, variable, average, and instantaneous velocities.

The body is said to be moving at a uniform speed if it travels the same distance in the same amount of time. If the body goes in a straight line without changing its direction, the velocity is said to be constant. In all scenarios, there is no acceleration.

Given:

Velocity = 13.4 m/s

Time = 10.0 s

The distance the seagull will fly can be calculated by multiplying its velocity by the time it travels:

distance = velocity x time

distance = 13.4 m/s x 10.0 s

distance = 134 meters

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To solve this problem, we can apply the principle of conservation of momentum. According to this principle, the total momentum before the jump is equal to the total momentum after the jump. The momentum (p) of an object is calculated as the product of its mass (m) and velocity (v):

p = m * v

Let's consider the child and the sled as a system. Before the jump, the child and the sled are moving together with the same initial velocity (let's call it V). After the jump, the child's velocity changes to -2.5 m/s (opposite direction), and the sled's velocity changes to 6.3 m/s (forward direction).

Using the conservation of momentum:

Total initial momentum = Total final momentum

(mass of child * initial velocity) + (mass of sled * initial velocity) = (mass of child * final velocity of child) + (mass of sled * final velocity of sled)

(38 kg + 63 kg) * V = (38 kg * -2.5 m/s) + (63 kg * 6.3 m/s)

101 kg * V = -95 kg·m/s + 397.5 kg·m/s

101 kg * V = 302.5 kg·m/s

V = 302.5 kg·m/s / 101 kg

V ≈ 2.995 m/s

Therefore, the initial velocity of the sled (and the child before the jump) is approximately 2.995 m/s.

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Winter tyres reduce braking distance by 10% on wet surfaces and by 20% on snow.Tire tests are used to analyze a tire's performance in terms of grip, wear, noise, rolling resistance and behavior

Performance tires are made to improve the handling and traction of sports cars and other vehicles, especially in dry and wet situations. They play a crucial role in providing the thrilling driving experience that competitive drivers desire.

Because the sidewalls are already rigid, tires with low and ultra-low profiles (aspect ratios of 30-45) are frequently high performance tires. These tires' drawbacks include their increased noise level, increased bumpiness, and often shorter tread life compared to touring tires.

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Answer: 2 i think

Explanation:

Answer:Im pretty sure its the second one because sound sometimes bounces back and that causes echo and it doesnt travel in one line or direction

Explanation:

A photon of light with a wavelength of 1.22 10 m interacts with a hydrogen atom that has an electron in the ground state.

The lowest permitted energy level for hydrogen is the ground state, which also has no angular momentum. The most stable state was the 1s atomic orbital, which contained a single electron.

The electron weighs 9.1 10 31 kg (m = 9.1 10 31 kg). We obtain a wavelength of 1010m, or about the size of an atom, from the de Broglie relation. Because of this, we may directly examine the atomic structure of a crystal using electron microscopes.

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Answer:

i believe it would be 40 divided by 1,532 but i may be wrong! i haven't done this in a while

Explanation:

The strong man accelerates the boulder of mass 264 kg at 4.1 m / s² if he uses a force of 2452 N.

W = m g

W = Weight

m = Mass

g = Acceleration due to gravity

m = 264 kg

g = 9.8 m / s²

W = 264 * 9.8

W = 2587.2 N

F = 2452 N

W = Normal force, N = 2587.2 N

\(f_{k}\) = μ N

\(f_{k}\) = Kinetic frictional force

μ = Co-efficient of kinetic friction = 0.53

\(f_{k}\) = 0.53 * 2587.2

\(f_{k}\) = 1371.22 N

∑ \(F_{x}\) = m a

F - \(f_{k}\) = m a

2452 - 1371.22 = 264 * a

a = 1080.78 / 264

a = 4.1 m / s²

Therefore, the strong man accelerates the boulder at 4.1 m / s²

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Answer:

Because the atmosphere is so thin, high wind velocities are needed to move sand and dust.

The movement of a pendulum is a good example of potential energy being transformed into kinetic energy and back again.

Kinetic Energy: The energy of a body due to its motion is called kinetic energy.

Potential Energy: Potential energy is the energy that is stored in an object due to its position relative to some zero position. Electrostatic energy, Gravitational energy, etc. are some examples of potential energy.

When the pendulum is at its extremes, all the energy of the pendulum is converted into potential energy. And when it is at the center it has only kinetic energy. At other positions, the total energy is the sum of potential and kinetic. But the total energy of the pendulum is always conserved.

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The correct question is-

Give an example of a system where potential energy is transformed into kinetic energy and back again. Explain.

We may use kinematic equations to explain and forecast the motion moving objects. However, we do not yet have a precise equation that links acceleration.

Speed is defined as the ratio of the completed distance to the time required to cover that distance. Since speed only includes a part and no magnitude, it is a proportionality constant.

By subtracting the distance traversed by the time needed to get there, speed is computed. To calculate the passing time, multiply the ranges by the speed. To calculate the distance, multiply the speed by both the time. These equations may be abbreviated as s=d/t.

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Yes, It is better to have low opacity in the atmosphere when using a giant refracting telescope.

1. Opacity refers to the degree to which the atmosphere obstructs or scatters light. In the context of using a refracting telescope, low opacity is desirable because it allows more light to reach the telescope's optics, resulting in better image quality and increased visibility of celestial objects.

2. A refracting telescope uses lenses to collect and focus light from distant objects. When the atmosphere has low opacity, the lenses can gather a greater amount of light, enhancing the telescope's ability to capture detailed images of stars, planets, and other astronomical phenomena.

3. High opacity in the atmosphere, such as due to pollution, dust, or atmospheric conditions, can significantly degrade the performance of a refracting telescope. It scatters and absorbs light, reducing the amount of light reaching the lenses and causing images to appear faint, blurred, or distorted.

4. Therefore, a giant refracting telescope benefits from a transparent atmosphere with low opacity. Astronomical observatories are often situated in remote locations with minimal light pollution and atmospheric disturbances to maximize the telescope's effectiveness.

5. By minimizing opacity, astronomers can obtain clearer and sharper images, enabling them to study celestial objects with greater precision and detail. This enhances our understanding of the universe and facilitates scientific discoveries in the field of astronomy.

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Given

mj = 65 kg

mc = 78 kg

voj = 5.75 m/s

after collision

vfj = vfc = 0 m/s

Procedure

The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.

The velocity before the collision would be 4.8m/s

Hi there!

We know that:

Ei = Ef

At the bottom of the incline, we have both rotational and translational kinetic energy. Recall:

Translational KE  = 1/2mv²

Rotational KE = 1/2Iw²

We can begin by deriving an equation for the final energy of the sphere.

Moment of Inertia of a hollow sphere= 2/3mR²

\(KE_{total} = \frac{1}{2}mv^2 + \frac{1}{2}(\frac{2}{3}mR^2(\frac{v^2}{R^2}))\)

Simplify:

\(KE_{total} = \frac{1}{2}mv^2 + \frac{1}{3}mv^2 = \frac{5}{6}mv^2\)

Since Ei = Ef, and the initial energy is simply PE = mgh, thus:

mgh = 5/6mv²

Cancel out 'm':

gh = 5/6v²

We are given the angular velocity, so we can convert to velocity using:

v = ωr

v = 5.88(.68) ≈ 4.00 m/s

h = (5/6v²)/g

h = (5/6(4²))/g = 1.359 m

The drift velocity v will give us the answer.

\(v = (5 V) / ((2x10^20 electrons/m³) * (2x10^-6 m²) * (1.6x10^-19 C))\)

To find the drift velocity of charges in the wire, we can use Ohm's Law, which states that the current flowing through a conductor is directly proportional to the applied voltage and inversely proportional to the resistance. The equation for Ohm's Law is:

I = V / R

Where:

I is the current flowing through the wire,

V is the applied voltage (in this case, 5 Volts),

R is the resistance of the wire (given as 10^2 Ohms).

Now, we need to calculate the current flowing through the wire using Ohm's Law. The current is the rate at which charges (electrons) move through the wire. The equation for current is:

I = n * A * v * q

Where:

n is the number of charges per unit volume (given as 2x10^20 electrons),

A is the cross-sectional area of the wire (given as 2 mm² or 2x10^-6 m²),

v is the drift velocity of the charges (what we need to find),

q is the charge of each electron (1.6x10^-19 C).

Rearranging the equation and solving for v, we have:

v = I / (n * A * q)

Substituting the given values:

v = (5 V) / ((2x10^20 electrons/m³) * (2x10^-6 m²) * (1.6x10^-19 C))

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Answer:the basic building block of chemistry

an atom

you can use formula:

\(\tt N_t=(\dfrac{1}{2}^n)N_o\\\\N_t=final\:mass\\\\N_t=initial\:mass\\\\n=number\:of\:half-life\)

Input the value:

\(15=120(\dfrac{1}{2}^n)\\\\\dfrac{15}{120}=\dfrac{1}{2}^n\\\\\dfrac{1}{8}=\dfrac{1}{2}^n\\\\\dfrac{1}{2}^3=\dfrac{1}{2}^n\Rightarrow \boxed{\bold{n=3\:half-lives}} \)

Answer:

The process of heat conduction depends on four basic factors: the temperature gradient, the cross section of the materials involved, their path length, and the properties of those materials.

Explanation:

There are 133.322 microns in 1 mm Hg.

The term "mm Hg" refers to millimeters of mercury, which is a unit of pressure. A micron, on the other hand, is a unit of length equal to one millionth of a meter. The relationship between these two units is based on the physical properties of mercury, which is used as a reference fluid in many pressure measurements.

One millimeter of mercury is equal to 133.322 microns, so there are 133.322 microns in 1 mm Hg. This conversion factor is commonly used in the fields of medicine and engineering to convert between pressure and length units.

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The vehicle needs to do 515872.5 Joule of labor in order to reduce its speed from 25 m/s to 12 m/s when a small truck has a mass of 2095 kg.

What exactly is speed?

the rate at which the position of an object changes in any direction. The ratio of distance traveled to the time required to travel that distance is known as speed. Speed is a scalar quantity because it has no magnitude and only a direction. The SI unit of speed is made up of the fundamental units of time and distance. The speed measurement in the metric system is measured in meters per second. Work is defined as the energy that is moved to or from an item by exerting force along a displacement.  It is easiest to express as the product of force magnitude and distance traveled with a constant force acting in the same direction as the motion.

According to the International System of Units, a joule is a unit of work.

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If a 0.030-kg bullet is shot vertically at 200 m/s into a 0.15-kg baseball, the combined height of the bullet and baseball following the collision is at most 56.6 m, provided the bullet embeds itself in the ball.

This phase will begin immediately prior to the collision and conclude immediately following the impact (when the two objects are on the verge to move up as a single unit). Note that we are assuming the ball will initially be moving at a speed of 200 m/s when the bullet then collision with it. At this point, we define the system as the ball plus the bullet. We are ignoring any outside factors, such as air resistance or even gravitational force, that can affect this system. As a result, the final velocity of the system immediately following the impact can be determined using the conservation of momentum principle, p=0. The gravitational potential energy is being ignored because we assume that the ball and the bullet were at the same level just before (and just after) colliding.

Yf = v1^2*2*9.8

Yf = 33.3^2*2*9.8

Yf = 56.6 metres.

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