1. A soccer ball is kicked horizontally off a cliff with an initialspeed of 8 m/s and lands 16m from the base of
the cliff
a. What is the time of flight of the soccer ball?
b. What is the height of the cliff?

We are asked to determine the charge of a proton, an electron, and a neutron. The charges of these particles are considered constant. The proton is a particle that is located in the nucleus of an atom and its charge is:

Where "e" is the elementary charge and is equivalent to:

The unit of charge is "C" and it is called "Coulombs".

In the case of the neutron, this is also a particle that is located in the nucleus of the atom but this particle carries no charge, therefore, the charge of a neutron is:

In the case of the electron, this is a sub-atomic particle with a negative charge. The charge of the electron is:

This means the negative of the elementary charge.

Surprise is the facial expressions is recognized by people of all cultures.

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(a) The wavelength of the wave is 3.31 meters.
(b) The frequency of the wave is 65.19 Hz.

A wave travels with a speed of 216 m/s and has a wave number of 1.90. In order to find the wavelength, we can use the formula λ = 2π/k, where λ is the wavelength and k is the wave number. Plugging in the values, we get λ = 2π/1.90 ≈ 3.31 m. Therefore, the wavelength of the wave is approximately 3.31 meters.

To find the frequency of the wave, we can use the formula v = fλ, where v is the wave speed and f is the frequency. Rearranging the formula to solve for f, we get f = v/λ. Plugging in the values, we get f = 216/3.31 ≈ 65.19 Hz. Therefore, the frequency of the wave is approximately 65.19 Hz.

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Answer:

the answer to the first one is B and the second one is c I hope I got them right

Answer:

rotation is a day and revolution is 365 days

Tension must a rope withstand is 2.182kN

Tension is described stress transmitted axially by a cord, rope, chain, or similar object, or through the ends of a rod, truss, or similar three-dimensional object. Stresses can also be described as pairs of acting and reaction forces acting at each end of the element. Tension may be the opposite of compression. At the atomic level, a restoring force can create what is called stress when atoms or molecules are pulled apart and gain potential energy while the restoring force is still present. An end of a cord or rod under such tension can pull on the object to which it is attached to return the cord or rod to its relaxed length.

Solution:

Assuming only tension and gravity act on the car,

T+mg=ma

T=m(g+a)

=3074*(9.81 - 9.1) N

=2.182 kN which is the tension the rope must withstand.

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The momentum of the 5kg object before the collision is; 50kgm/s.

The momentum of a body is mathematically evaluated as the product of its mass and velocity of motion.

According to the question;

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Together, the two cars are traveling at a speed of 29.11 m/s.

As a result,

The car's mass is 1 m = 1250 kg.

Initially, the car's speed was 1, u = 32 m/s.

Car 2 mass, m' = 875 kg

The starting speed of vehicle 2 is 25 m/s.

both vehicles stick together. An inelastic collision is a situation here. The pace is maintained. Let V be the combined speed of the two vehicles.

Using conV = 29.11 m/s, it is determined.

Thus, the combined speed of the two cars is 29.11 m/s. Therefore, this is the necessary solution. momentum preservation as:

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\(\small\bf\red{First\: Women}\begin{cases}\sf{Initial\: Velocity\: =\: 15m/s}\\\sf{Time\: Taken\: = 100\: seconds}\end{cases}\)

\(\small\bf\green{Second\: Women}\begin{cases}\sf{Initial\: Velocity\: =\: 20m/s}\\\sf{Time\: Taken\: = 100\: seconds}\end{cases}\)

\(\:\:\:\:\bullet\:\:\sf{Distance \: between \:them \:after \:{\sf{\blue{100 \:seconds}}}} \\ \)

\(\\→\:\:\:\sf Distance\: travelled \:by \:1st \:women\: = \: Velocity \times Time\:taken\)

\(→\:\:\:\sf 15 \times 100\)

\(→\:\;\:\sf 1500m\)

\(→\:\:\:\sf s_{1} = {\sf{\red{1500m}}} \\ \\ \)

\(\Rightarrow\:\:\:\sf Distance \:travelled \:by\: 2nd \:women\: = \: Velocity \times Time\:taken\)

\(\Rightarrow\:\:\:\sf 20 \times 100\)

\(\Rightarrow\:\:\:\sf 2000m\)

\(\Rightarrow\:\:\:\sf s_{2} = {\sf{\purple{2000m}}} \\ \\ \)

\(\small{\underline{\bf{Now, \:Distance \:between \:them\: =\: s_{2} - s_{1}}}_{}}\)

\(\hookrightarrow\:\:\:\sf 2000 - 1500\)

\(\hookrightarrow\:\:\:\bf \pink{500m} \\ \\ \)

\({\underline{\bf{Hence, }}}\)

Total Distance between them after \(\bf{100 \:seconds}\) is \(\bf\orange{500m}\)

Answer:

.37 of a second

Explanation:

because the tiger only traveled 14 meters/of the 37.5 it can travel in just 1 second. so you treat it like a divisitory fraction. 14/37.50. you divide the 14 by 37.5 to find what fraction of the second it took to travel only 14 m. you can also use the same formula for distances that would require more than the 1 second to travel.

The time elapsed is  0.099s

Solution:

In order to get a good we need to understand that the concept used in this problem is the relation of time, speed and distance.

Initially, calculate the time taken by direct sound and the reflected sound to reach at the middle row using the relation of time, speed and distance. Finally, calculate the elapsed time by subtracting the time taken by direct sound from the time taken by reflected sound.  let look at some fundamentals

Time, distance and speed:

The relation between the speed, time and the distance is,

    t=  \(\frac{d}{v}\)

Here,  is the time, is the distance and  is the speed.

Step 1 of 2

Distance traveled by direct sound from the wall to the middle row is  \(\frac{L}{2}\)

Here, L  is the distance of the wall from the stage.

The time taken by direct sound from the wall to the middle row is,

\(t_{d}\) = \(\frac{d_{d} }{v}\)

Substitute \(\frac{L}{2}\) for  \(d_{d}\)

\(t_{d} =\frac{L}{2v}\)

Distance traveled by reflected sound from the wall to the middle row is

L+\(\frac{L}{2}\)

The time taken by reflected sound from the wall to the middle row is,

\(L_{r} =\) \(d_{r}\)/v

Substitute  for ,

\(L + \frac{L}{2 }\) For \(d_{r}\)

\(t_{r} =\frac{3L}{2V}\)

Note:

The time taken by direct sound is calculated using the distance traveled by direct sound from the wall to the middle row. The distance traveled by the reflected sound is the sum of distance traveled by the direct sound and the distance between the wall and the stage.

Step 2 of 2

The elapsed time calculated as,

t= \(t_{r} +t_{d}\) ............

t = \(\frac{3L}{V} +\frac{L}{2V}\)

t = \(\frac{L}{V}\)

Substitute equation (1) and equation (2) in equation (3).

Substitute 343 m/s  for  and 34 m for in the above expression.

  t = \(\frac{34}{343}\)

 = 0.099 s

Note :

The elapsed time is calculated by subtracting the time taken by direct sound from the time taken by reflected sound. Then, the value corresponding to the distance between wall and the stage and the value corresponding to the speed.

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A capacitor of approximately 3.18 µF will give a resonance frequency of 1000 Hz.

\(f = 1 / (2π√LC)\)

where f is the resonance frequency in Hz, L is the inductance in Henrys, and C is the capacitance in Farads.

We can rearrange this formula to solve for C:

\(C = 1 / (4π^2f^2L)\\\)

Substituting the given values, we get:

\(C = 1 / (4π^2(1000 Hz)^2(10 mH))\)

C ≈ 3.18 µF

Therefore, a capacitor of approximately 3.18 µF in series with a 100 Ω resistor and a 10 mH inductor will give a resonance frequency of 1000 Hz.

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Answer:

One end of any bar magnet will always want to point north if it is freely suspended. This is called the north-seeking pole of the magnet, or simply the north pole. The opposite end is called the south pole.

Explanation:

Answer:

North Pole and South Poles

Explanation:

There is no east or west in a magnetic field of a magnet. The magnetic field lines comes from North pole to south pole.

Answer:

7 meters away

Explanation:

12 x 1.5 = 18

25 - 18 = 7

Answer:

I1 = 2/5 M1 R^2   for a sphere about its center

I2 = 2/5 M2 (2 R)^2 = 2/5 M2 R^ * 4 = 8/5 M2 R^2

Remember that M2 is greater than M1 by a factor 0f 2^3 = 8

Then I2 exceeds I1 by a factor of 32

Answer:

Explanation:

a )

initial velocity u = 45 m/s

acceleration a = - 5 m/s²

final velocity v = 0

v = u - at

0 = 45 - 5 t

t = 9 s

b )

s = ut - 1/2 at²

= 45 x 9 - .5 x5x 9²

405 - 202.5

202.5 m

2 )

a )

s = ut + 1/2 a t²

u = 0

s = 1/2 at²

= .5 x 9.54 x 6.5²

= 201.5 m

b )

v = u + at

= 0 + 9.54 x 6.5

= 62.01 m / s

3

a )

acceleration = (v - u) / t

= (34 - 42) / 2.4

= - 3.33 m /s²

b )

v² = u² - 2 a s

34² = 42² - 2 x 3.33² s

s = 27.41 m

c )

Average velocity

Total displacement / time

= 27.41 / 2.4

= 11.42 m /s

4 )

a )

v = u + at

v = 0 + 3 x 4

= 12 m /s

b )

s = ut + 1/2 a t²

= o + .5 x 3 x 4²

= 24 m

A race car is moving at a constant speed around a track. The race car is changing its velocity as the direction of motion changes.

The primary indicator of an object's position and speed is its velocity. It is the distance that an object travels in one unit of time. The displacement of the item in one unit of time is the definition of velocity.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.

As the race car is moving at a constant speed around a track, the magnitude of velocity remains same but during race it may changes its direction of motion, that is why, velocity of it, which depends on both magnitude and direction, may changes.

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Answer:

Initial: bring ek, eg and ech all to 2, in the end bring ek, eg up to 3 each

Explanation:

The initial state of the ball, the effect the ball might have on the Earth, and the balls final state. Ek stands for kinetic energy, Eg stands for gravitational potential energy, and Ech stands for chemical change (stored energy in food/fuel), Eint stands for internal energy change.

Kinetic energy is the type of energy present in a body due to the property of its motion and potential energy is the kind of energy present in a body due to the property of its state.

Kinetic energy can be easily transferred from one body to another but potential energy is not transferable. Kinetic energy is relative with respect to nature and potential energy is non-relative with respect to nature.

As the ball is rolling down a ramp, its potential energy decreases and kinetic energy increases.  The ball has the maximum potential energy when it is at the top, and this potential energy is transformed into both translational and rotational kinetic energy as it rolls down.

When the ball is at the topmost height, its gravitational potential energy is maximum and zero kinetic energy. When a ball reaches the bottom of the ramp, it will have zero potential energy and maximum kinetic energy.

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Condensation, freezing, solidification are same process while crystallization is different from condensation, freezing and solidification.

A. Condensation - It is the process of conversion of water vapours or gas to liquid. For example conversion of steam into water. Condensation occurs at 100 degree celcius.

B. Freezing - It is the phase when liquid gets converted into solid. For example conversion of water into ice. It starts at 0 degree celcius for water.

C. Crystallization - It is the process of forming Crystals. For example evaporation of salt water.

D. Solidification - The process of conversion of liquid into solid. For example formation of snow and solidification of melted candle wax.

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Condensation, freezing and solidification are  same process of phase transformation whereas Crystallization is different from others.

The physical process of changing a medium's state from one to another is known as a phase transition (or phase change) in the domains of chemistry, thermodynamics, and other related sciences. The phrase is frequently used to describe transitions between the three fundamental states of matter—solid, liquid, and gas—and, in rare instances, plasma.

The physical characteristics of a phase of a thermodynamic system and the states of matter are constant. Certain properties of a given medium change during a phase transition as a result of a change in the environment, such as temperature or pressure. This change can be discontinuous. The phase transition point is identified by the external circumstances in which a change takes place.

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The light travels through water and gets reflected off on the glass surface into the water. There had been a 180° phase change between the incident and the reflected wave. This is called Total internal reflection (TIR).

In total internal reflection, in physics, a ray of light in a medium such as water or glass is completely reflected back into the medium from the surrounding surfaces. This phenomenon occurs when the angle of incidence is greater than a certain critical angle called the critical angle.

TIR only occurs when both of the following two conditions are met

Thus, the phases which include the TIR are the incident and the reflected phase and the incident light hits the surface while the reflected light reflects back.

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Trucks stopping on wet or slippery surfaces can increase their stopping distance significantly. The increased stopping distance is due to reduced tire traction and poor road conditions.

The stopping distance can vary depending on various factors such as vehicle speed, tire condition, road surface condition, and brake system condition. On a dry road, a truck traveling at 60 miles per hour can take about 250 feet to come to a complete stop. However, on a wet or slippery road, the stopping distance can increase by up to two times, meaning it can take up to 500 feet or more for a truck to stop completely. This is because water and other contaminants reduce the friction between the tire and the road surface, reducing the tire's ability to grip the road surface and bring the vehicle to a stop.

Therefore, it is essential for truck drivers to maintain a safe distance from other vehicles, drive at slower speeds, and take extra caution when stopping on wet or slippery surfaces to avoid accidents due to increased stopping distances.

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Answer:

Because it’s imposible

If you stand on a bathroom scale and it reads 498 N, the value of the upward support force, in N, acting on you is also 498 N.

If the bathroom scale reads 498 N, it means that the scale is measuring the force exerted on it by your weight. Therefore, the value of the upward support force acting on you is also 498 N. This is because the scale is designed to balance out the downward force of your weight with an equal and opposite upward force. To find the value of the upward support force acting on you, we need to understand the concept of weight and the forces acting on an object.

1. Weight: Weight is the force exerted on an object due to gravity. It is the product of an object's mass and the acceleration due to gravity.

2. Mass: Mass is a measure of the amount of matter in an object. It is a scalar quantity and is usually measured in kilograms (kg).

3. Acceleration due to gravity: On Earth, the acceleration due to gravity is approximately 9.8 meters per second squared (m/s²).

4. Upward support force: When you stand on a bathroom scale, it measures the force exerted on it by your weight. The scale displays the magnitude of this force.

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Answer:  An effect of continental drift is causing tectonic plates resting upon the convecting mantle to move which results in natural disasters like earthquakes, volcanic eruptions, and more.

Answer:

maximum height reach by rockect =970.2metre

Explanation:

Explanation:

a) Velocity and acceleration of a car are parallel when the car is moving along a straight line in the same direction. For example, when a car is gaining speed as it moves forward in a straight line, both velocity and acceleration are directed in the same direction.

b) Velocity and acceleration of a car are anti-parallel when the car is moving along a straight line in the opposite direction. For example, when a car slows down while moving in a straight line, its acceleration is directed opposite to the direction of its velocity, or the other way around.

Answer:

a)

There is only one case where velocity and acceleration are parallel only when they are moving in the same direction.

b)

There are 3 cases where velocity and acceleration are antiparallel.

(i) When both are moving in different direction

   It means :

(ii) When the object is slowing down, where velocity and acceleration are in the opposite direction.

(iii) In case of motion reversal.

Explanation:

The average force that was exerted to slow the object is 0 N.

To find the average force that was exerted to slow the object, we can use the formula:

F = mΔv / Δt

Where:
F = force (in Newtons)
m = mass (in kilograms)
Δv = change in velocity (in meters per second)
Δt = change in time (in seconds)

Given that the gravitational force is balanced by the buoyant force of the water, the net force on the object is zero. This means that the average force exerted to slow the object is also zero.

Therefore:
F = 0 N

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The wolf's kinetic energy is 2,500 joules, calculated using the formula KE = 0.5 × mass × velocity².

The kinetic energy of an object is the energy it possesses due to its motion.

It can be calculated using the formula KE = 0.5 × mass × velocity², where KE represents kinetic energy, mass is the object's mass in kilograms, and velocity is its speed in meters per second.

In this case, the mass of the wolf is 50 kg, and its velocity is 10 m/s.

Plugging these values into the formula, we get KE = 0.5 × 50 × (10)², which simplifies to KE = 0.5 × 50 × 100.

Therefore, the wolf's kinetic energy is 2,500 joules.

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