Suppose you are given two clay balls of equal size and shape. The two clay balls also weigh the same. One ball is flattened into a pancake-shaped piece. Which of these statements is correct and why?

Answer:

1. Y = \(\frac{P*L}{Y}\) = ((1.61 × 10⁸) × 0.47) ÷ 1.8 × 10¹⁰

   Y = 4.20Ε17 mm

2. P = F/A

   F = m×g = 68 ×9.8 = 666.4N

   A = (2 · (0.04)² = 0.0032²

   P = 666.4 ÷ 0.0032 = 208250 Pa

3. Psi = 208250 ÷ 6894.76

   Psi = 30.20 lb/in²

4. Δp = 2 × mass × velocity

   Δp = 2 × 0.005 × 11.7 × sin32 = 0.0620 kgm/s

   Δp = 578 × 0.0620 = 35.83 kgm/s

   F = Δp/Δt = 35.83 ÷ 84

   F = 0.4266N

5. P = F/A = 0.4266 ÷ 0.828

   P = 0.515244 N/m²

**(I'll add the last few later)**

The refraction of a sound wave occurs when the sound wave bends as it passes through the boundary between media. Refraction occurs when there is a difference in the speed of sound waves in two different media.

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Answer: B

Explanation: B is the correct statement describing the positions of the Moon, the Sun, and the Earth during a new moon. The Moon is between Earth and the Sun.

During a new moon, the Moon is positioned between the Sun and the Earth, with the illuminated side of the Moon facing away from the Earth. This means that the side of the Moon that faces the Earth is not receiving any sunlight, making it invisible to us from Earth. The new moon is the first phase of the lunar cycle and occurs roughly every 29.5 days.

PHYSICS

mass = 55 kg

gravitation earth = 9,8 m/s²

gravitation moon = 1,62 m/s²

Weight Change = ______?

Answer :

1) Earth

\(w = m \times g\)

w = 55 × 9,8

w = 539 N

2) Moon

\(w \: = m \times g\)

w = 55 × 1,62

w = 89.1 N

One of the major effects of heat transfer is temperature change: heating increases the temperature while cooling decreases it. We assume that there is no phase change and that no work is done on or by the system. Experiments show that the transferred heat depends on three factors—the change in temperature, the mass of the system, and the substance and phase of the substance.

Figure a shows a copper-colored cylinder of mass m and temperature change delta T. The heat Q, shown as a wavy rightward horizontal arrow, is transferred to the cylinder from the left. To the right of this image is a similar image, except that the heat transferred Q prime is twice the heat Q. The temperature change of this second cylinder, which is also labeled m, is two delta T. This cylinder is surrounded by small black wavy lines radiating outward. Figure b shows the same two cylinders as in Figure a. The left cylinder is labeled m and delta T and has a wavy heat arrow pointing at it from the left that is labeled Q. The right cylinder is labeled two m and delta T and has a wavy heat arrow pointing to it from the left labeled Q prime equals two Q. Figure c shows the same copper cylinder of mass m and with temperature change delta T, with heat Q being transferred to it. To the right of this cylinder, Q prime equals ten point eight times Q is being transferred to another cylinder filled with water whose mass and change in temperature are the same as that of the copper cylinder.

Answer:

D

Explanation:

If you pull with a constant force of 400 N for 0.2 meters, then the work done will be equal to 80 J.

In physics, the word "work" involves the measurement of energy transfer that takes place when an item is moved over a range by an externally applied, at least a portion of which is applied within the direction of the displacement.

The length of the path is multiplied by the element of a force acting all along the path to calculate work if the force is constant. The work W is theoretically equivalent towards the force f times the length d, or W = fd, to portray this concept.

As per the given information in the question,

Force, f = 400 N

Displacement, d = 0.2 meters

\(Work done(W)=Force(f)*Displacement(d)\)

W = 400 × 0.2

W = 80 J.

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As a result, the point 4.0 cm from the center has a total angular displacement of 257.0 radians.

Angular acceleration is a measure of how quickly the angular velocity of an object changes over time. It is defined as the rate of change of angular velocity with respect to time, and it is a vector quantity with units of radians per second squared (rad/s²).

Here,

We can use the following kinematic equations to solve this problem:

Angular velocity as a function of time and angular acceleration:

ω = ω0 + αt

Angular displacement as a function of time, initial angular velocity, and angular acceleration:

θ = θ0 + ω0t + 1/2 αt²

Final angular velocity squared as a function of initial angular velocity squared, angular acceleration, and angular displacement:

ω² = ω0² + 2αθ

First, let's find the time it takes for the CD to reach an angular velocity of 5.0 rad/sec:

ω = ω0 + αt

5.0 rad/sec = 0 + 1.0 rad/sec² * t

t = 5.0 seconds

Next, let's find the initial angular velocity at the end of the 5 seconds:

ω = ω0 + αt

ω = 0 + 1.0 rad/sec² * 5.0 seconds

ω = 5.0 rad/sec

Using equation 2, let's find the angular displacement during the first 2.0 seconds for a point 4.0 cm from the center:

θ = θ0 + ω0t + 1/2 αt²

θ = 0 + 0 + 1/2 * 1.0 rad/sec² * (2.0 seconds)²

θ = 2.0 radians

Now, let's find the angular displacement during the 15 seconds when the CD is rotating at a constant angular velocity of 5.0 rad/sec:

θ = ω0t + 1/2 αt²

θ = 5.0 rad/sec * 15 seconds + 0.5 * 0 * (15 seconds)²

θ = 75.0 radians

Finally, let's find the angular displacement during the 12.0 seconds it takes for the CD to slow down to a stop:

ω² = ω0² + 2αθ

0 = (5.0 rad/sec)² + 2αθ

α = -(5.0 rad/sec)² / (2 * θ)

α = -6.67 rad/sec² (negative because it is slowing down)

θ = ω0t + 1/2 αt²

θ = 5.0 rad/sec * 12 seconds + 0.5 * (-6.67 rad/sec²) * (12 seconds)²

θ = 180.0 radians

Therefore, the total angular displacement of the point 4.0 cm from the center is 257.0 radians.

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Answer:

Explanation:

Pressure will expand a gas, enlarging its volume and reducing its density and concentration of particles. Pressure will magnify a gas, developing its volume and multiplying its density and concentration of particles.

Increasing the pressure of a gas is exactly the same as increasing its concentration. If you have a given mass of gas, the way you increase its pressure is to squeeze it into a smaller volume. If you have the same mass in a smaller volume, then its concentration is higher.

Answer:

A. 13 cm

Explanation:

here the total diameter is given 4 cm,

here the radius then will be 2 cm.

use the formula of circumference of circle = 2πr ........where r is the radius

using the formula: 2 * π * 2 = 4π = 12.57 = 13 cm.

Sound waves are a type of mechanical wave that propagate through a medium, typically air but also other materials such as water or solids.

Frequency: the frequency of a sound wave refers to the number of cycles or vibrations it completes per second and is measured in Hertz (Hz).

Amplitude: the amplitude of a sound wave refers to the maximum displacement or intensity of the wave from its equilibrium position. It represents the loudness or volume of the sound, with larger amplitudes corresponding to louder sounds and smaller amplitudes corresponding to softer sounds.

Wavelength: the wavelength of a sound wave is the distance between two consecutive points in the wave that are in phase, such as from one peak to the next or one trough to the next. It is inversely related to the frequency of the wave.

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Using excess energy from a sunny day stored in batteries for power best describes how a homeowner using an off-the-grid PV solar system, as seen in the graph above, can power a home between 9:00 PM and 6:00 AM (Option C).

Solar energy systems refer to all types of devices and strategies aimed at using the energy from the sun to maintain satisfied our energetic requirements in a community and also in a particular case such as a home.

These systems (solar energy systems) may be on-grid systems (i.e. grid-feed solar energy), off-grid systems, or hybrid systems that use a battery in order to store the solar energy in the form of potential energy to be used when required.

Therefore, with this data, we can see that solar energy systems are based on different strategies for using this type of energy.

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Answer:

E. converging surface winds

Explanation:

For the formation of tropical cyclones to occur in the northeast of the tropical Pacific Ocean, it is necessary to have converging surface winds that present a strong convection. This allows for the formation of vertical movements of an ascending nature that have great strength and are intense and violent. This also allows closed cyclonic circulation to occur at the lower levels which together with a low frontal pressure system over the waters of the Pacific Ocean can form the tropical cyclone.

The Brundtland Commission spotted as a matter of urgency, the interconnection between natural resource use and the economy.

The Brundtland Commission was set up with the intention to achieve sustainable development. The tenure of the commission lasted from 1984 to 1987.

The commission identified the pillars of sustainable growth as economic growth, environmental protection, and social equality. The committee opined that environmental problem emanates from poverty in the southern region and reckless consumption of resources in the northern region.

The Brundtland Commission spotted as a matter of urgency, the interconnection between natural resource use and the economy.

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Bones are physical characteristics that protect animals from forces.

Option C. The heat absorbed or lost by a substance while it's changing state  correctly describes latent heat

Latent heat is the heat absorbed or lost by a substance while it is changing state.

The latent heat is a type of heat that is transferred during phase change, i.e., while a substance undergoes a change of state.

For example, when ice melts into liquid water, or when liquid water evaporates into water vapor, heat is absorbed from the surroundings.

Latent heat is not associated with a temperature change; rather, it's associated with a change of state.

For instance, the temperature of water remains at 100°C while boiling.

When water is boiling, the latent heat of vaporization is absorbed and utilized to break the hydrogen bonds holding water molecules together to change water from the liquid phase to the gaseous phase.

When the water is boiling, adding more heat won't increase the water's temperature, instead, the extra heat will be absorbed to change the phase of water molecules.

Therefore, the correct answer to the given question is option C: The heat absorbed or lost by a substance while it is changing state.

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Answer:524 Hz

Explanation:

Approximate frequency, heard in other car, when two car approaches each other, before they cross each other is 524 Hz.

Frequency of wave is the number of waves, which is passed thorough a particular point at a unit time.

For the two cars approaching each other the Doppler formula to find the frequency of second car is given as,

\(f_2=\dfrac{V_s+V_2}{V_s-V_1}f_1\)

Here, \(V_s\) is the speed of the sound.

Two cars approach each other from opposite directions.The velocity of car one is 54 km/h and the velocity of the car two is also 54 km/h.

Convert the unit of velocity of the car as,

\(\rm 54km/s=54\times\dfrac{5}{18}m/s\\\rm 54km/s=15m/s\)

As we know that the speed of the sound is 340 m/s and one of the cars emits a note of frequency 480 Hz.

Thus, putting the values in the above formula to find out the frequency heard in the other car before they cross each other as,

\(f_2=\dfrac{340+15}{340-15}480\\f_2=524.3\rm Hz\)

The approximate frequency heard in the other car before they cross each other is 524 Hz.

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Answer:

for the body to float, the density of the body must be less than or equal to the density of the liquid.

Explanation:

For a block to float in a liquid, the thrust of the liquid must be greater than or equal to the weight of the block.

Weight is

        W = mg

let's use the concept of density

        ρ_body = m / V

        m = ρ_body V

        W = ρ_body V g

The thrust of the body is given by Archimedes' law

        B = ρ_liquid g V_liquid

as the body floats the submerged volume of the liquid is less than or equal to the volume of the block

       ρ_body V g = ρ_liquid g V_liquid

       ρ_body = ρ liquid Vliquido / V_body

As we can see, for the body to float, the density of the body must be less than or equal to the density of the liquid.

A golfer is attempting to reach the elevated green by hitting his ball under a low-hanging branch in one tree A, but over the top of a second tree B. If the launch speed of the golf ball is vo = 115 mi/hr, what launch angle 0 will put the first impact point of the ball closest to the pin. The first impact point of the ball closest to the pin will be approximately 407.5 ft from the launch point.

The equation for the range of a projectile is R = (V0² / g) * sin(2θ)The golfer has to hit the ball under a low-hanging branch in tree A and over the top of tree B to reach the elevated green.

Let's denote the distance between the golfer and the green as d. The range (R) of the projectile will equal the distance to the pin (d) if the ball lands at the same level as it was launched. If the ball has to land at a higher elevation than the launch point, the launch angle must be greater than the optimal angle that maximizes range.

Assuming the golfer is hitting from a horizontal surface (i.e. the ball is launched from the same level as the pin), the launch angle that will give the first impact point of the ball closest to the pin is 60°.At the launch angle of 60°, the distance to the pin (d) will be the range of the projectile (R).The velocity of the golf ball at launch is vo = 115 mi/hr.

The horizontal distance to the pin, which is the range of the projectile, is given by the equation;

R = (V0² / g) * sin(2θ)

where g = acceleration due to gravity = 32.2 ft/s² (let's convert the velocity to ft/s first)

vo = 115 mi/hr = 115 x 5280 ft/hr = 607200 ft/hr ≈ 168666.7 ft/hr

The initial velocity of the projectile, V0 = 168666.7 ft/hr. The optimal angle of launch is given by the equation:θ = 45° (for maximum range)The angle of launch required to achieve the shortest distance to the pin is 60°Let's substitute the values of V0 and θ into the range equation.

To calculate the range of the projectile R = (V0² / g) * sin(2θ)R = (168666.7² / 32.2) * sin(2(60))R ≈ 407.5 ft

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Answer:

I believe the answer is sea floor spreading

Answer:

A. α = - 1.047 rad/s²

B. θ = 14.1 rad

C. θ = 2.24 rev

Explanation:

A.

We can use the first equation of motion to find the acceleration:

\(\omega_f = \omega_i + \alpha t\\\)

where,

ωf = final angular speed = 0 rad/s

ωi = initial angular speed = (30 rpm)(2π rad/1 rev)(1 min/60 s) = 3.14 rad/s

t = time = 3 s

α = angular acceleration = ?

Therefore,

\(0\ rad/s = 3.14\ rad/s + \alpha (3\ s)\\\)

α = - 1.047 rad/s²

B.

We can use the second equation of motion to find the angular distance:

\(\theta = \omega_i t + \frac{1}{2}\alpha t^2\\\theta = (3.14\ rad/s)(3\ s) + \frac{1}{2}(1.04\ rad/s^2)(3\ s)^2\\\)

θ = 14.1 rad

C.

θ = (14.1 rad)(1 rev/2π rad)

θ = 2.24 rev

Answer:

Explanation:

The energy transfer are not changing in kinetic energy. They are changes in bonding energy between the molecules.

Answer:

none no work cuz no motion

Explanation:

GOOD LUCK

The front of the truck is designed to crumple during a collision to absorb the impact energy, slow down the collision, and protect the well-being of the passengers. This design feature helps increase the collision time, reduce the forces acting on the passengers, and minimize the risk of severe injuries.

Danica observes a collision between two vehicles. She sees a large truck driving down the road. It strikes a small car parked at the side of the road. On colliding, the truck applies a force on the stationary car, and the stationary car applies an opposite force on the truck. The front of the truck is designed to crumple in order to absorb the impact energy and slow down the collision , which protects the well-being of the passengers.

During a collision, the principle of Newton's third law of motion comes into play. According to this law, for every action, there is an equal and opposite reaction. In the case of the collision between the truck and the car, the truck exerts a force on the car, pushing it forward, while simultaneously experiencing an equal and opposite force from the car.

The purpose of designing the front of the truck to crumple is to increase the collision time and absorb the kinetic energy. When the truck collides with the stationary car, the front of the truck deforms, crumples, and absorbs a significant amount of the impact energy. This process increases the time over which the collision occurs, reducing the forces acting on the passengers and minimizing the risk of severe injuries.

By allowing the truck to crumple, the kinetic energy of the collision is transformed into other forms, such as deformation energy and heat. This energy transformation helps protect the passengers by reducing the deceleration forces acting on them. It also helps prevent the transfer of excessive forces to the car's occupants and reduces the likelihood of severe injuries.

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The density of water is approximately 1 g/cm^3. Therefore, the volume of 2800 g of water would be 2800 cm^3 because density is mass/volume, and so volume is mass/density.

Since this volume is inside a cubic box, the length of each side of the cube (a, for instance) could be found by taking the cubic root of the volume. This is because the volume of a cube is calculated by a^3 (length of one side cubed). Hence, a = cube root of 2800 cm^3 ≈ 14.1 cm.

Converting centimeters to meters (as 1 meter is equal to 100 centimeters), we get approximately 0.141 meters.

So the filled cubic box has a side length of approximately 0.141 m.

The boat's final velocity can be determined using the work-energy principle. Since the boat starts at rest, the work done on it will be equal to its change in kinetic energy.

Using the equation:

Work = Change in Kinetic Energy

300 J = (1/2) * m * v^2

where m is the mass of the boat and v is the final velocity, we can solve for v.

Plugging in the values:

300 J = (1/2) * 4.5 kg * v^2

Simplifying the equation:

v^2 = (2 * 300 J) / 4.5 kg

v^2 = 200 J / 4.5 kg

v^2 = 44.44 m^2/s^2

Taking the square root of both sides:

v = √(44.44 m^2/s^2)

v ≈ 6.66 m/s

Therefore, the boat's final velocity is approximately 6.66 m/s.

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When the earth revolving in the orbit has the comet tail or gas just passed through the earth orbit before the motion of earth through that point.

Then, the meteor showers are observed.

For example, each

The lamps shown in the diagram are connected in parallel.

The impact on the output voltage and the capacity of the battery system is the primary distinction between wiring batteries in series and parallel. The voltages of batteries connected in series will be added. Batteries connected in parallel will have their amp-hour capacities added together.

Because the voltage stays the same while the amps increase, parallel batteries last longer. It will still be a 12 volt system if you connect two 12v 50ah batteries in parallel, but because the amps double to 100ah, the batteries will last longer.

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