A cannonball is shot from a cannon at a launch angle of 63 and an initial velocity of 147 m/s. The gravitational acceleration is -9.8 m/s^2 . Assuming NO air resistance, how long the cannonball remain in the air.

A.)40.2s
B.)13.4 s
C.)26.7 s
D.)9.8 s

Answer:

Absolutely no real-life phenomena/ uses are possible that are related to any branch of physics, except:

1 The device you are reading this answer on. (quantum mechanics, electronics )

2 The air conditioner in your room. ( electromagnetism, electronics )

3 The satellites and space stations in space which will help in the deciphering of the universe will help us look for a suitable planet when we render the earth useless. ( general and special relativity, classical mechanics )

4 Ohh. I forgot, do you wear clothes, well they are made in factories where factories run on the principles of thermodynamics, which is physics.

5 Ever gone somewhere? Well, the transportation uses classical mechanics, thermodynamics, electromagnetism, relativity ( if you know Global Positioning System )

6 GPS itself! It’s used in online maps, navigating, and this sort of stuff. It works on general relativity.

Honestly, this list is endless.

To design a diving board (spring board) for a swimming pool that flexes but neither breaks nor permanently deforms, you would want to use materials that have:

High tensile strength: This is the ability of a material to resist breaking under tension. A material with a high tensile strength will be able to withstand the weight of divers and the forces created by their jumps without breaking.

High modulus of elasticity: This is a measure of a material's ability to flex without permanently deforming. A material with a high modulus of elasticity will be able to flex and return to its original shape, allowing the diving board to provide the desired spring action.

Low coefficient of thermal expansion: This is a measure of how much a material expands or contracts with changes in temperature. A material with a low coefficient of thermal expansion will be less affected by temperature changes, reducing the chances of permanent deformation or warping.

Good fatigue resistance: When a material is loaded and unloaded frequently, it can suffer from fatigue. A material with good fatigue resistance will be able to withstand the repeated loading and unloading caused by divers jumping on the board without developing permanent damage.

Common materials that can be used for diving boards are fiberglass-reinforced plastic (FRP), carbon-fiber-reinforced plastic (CFRP), and aluminum.

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Answer:

Eris

Explanation:

The object, temporarily designated 2003UB313 and later named Eris, orbits the sun about once every 560 years, its distance varying from about 38 to 98 AU.

Answer:

me

Explanation:

Answer:

The world would have been blown up by now.

Explanation:

Hypothetically, lets say that someone gave Kim Jong boi a cup of coffee.

He gets mad at the "public servant" since it didn't contain 3 posafa43asdunds of sugar which makes him "big".

The public servant claims they added jfoaj4su38093 units of sugar, which is equivalent to 3 posafa43asdunds.

He gets mad and launches big cannons at Trump since he blames Boe Jiden.

For a wire oriented so that the current flows into the screen experiences a force that deflects downward. The magnetic field must be directed out of the screen.

The right-hand rule for magnetic fields states that the direction of the magnetic field is out of the screen if a wire carrying current is arranged so that the current flows into the screen (perpendicular to the screen's plane) and it receives a downward push. This can be understood by considering the interaction between the magnetic field and the moving charges (current) in the wire.

The force experienced by the wire is perpendicular to both the current direction and the magnetic field direction, following the cross product relationship. In this scenario, to deflect the wire downward, the magnetic field lines must be directed out of the screen, creating a force that opposes the upward force on the wire due to gravity.

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When a vehicle is approaching you, it is important to dim your high-beam headlights to low beams within a distance of approximately 500 feet.

This distance provides enough time for the oncoming driver to adjust their vision and safely navigate the road. By dimming your high beams, you reduce the risk of blinding the other driver and causing potential accidents or discomfort. Maintaining proper headlight etiquette promotes safety and ensures a clear line of sight for all drivers on the road, allowing for a smoother and more secure driving experience during nighttime or low visibility conditions.

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Answer: a

Explanation: The color of a star is linked to its surface temperature. The hotter the star, the shorter the wavelength of light it will emit. The hottest ones are blue or blue-white, which are shorter wavelengths of light. Cooler ones are red or red-brown, which are longer wavelengths.

Answer:

1 2 3 and thats it

Explanation:

Answer:

hmmmm

Explanation:

Knowing the velocity of a cloud in the disk of the Milky Way is important for astronomers because it allows them to use the Doppler effect to determine how far away the cloud.

The Doppler effect is the change in frequency of waves (such as light waves) as the source of the waves moves closer or further away from an observer. By measuring the Doppler shift of the light emitted by the cloud, astronomers can calculate its velocity relative to Earth. Then, using the known rotation curve of the Milky Way, they can determine how far away the cloud is from the center of the galaxy. So, by knowing the velocity of a cloud, astronomers can calculate its distance and better understand the structure and dynamics of the Milky Way.
Knowing the velocity of a cloud in the disk of the Milky Way helps astronomers figure out how far away it is because it allows them to apply the principles of galactic rotation and the Doppler effect.

Step 1: Measure the cloud's radial velocity, which is its motion towards or away from us, using the Doppler effect. This effect causes the observed wavelength of light from the cloud to shift due to its motion.
Step 2: Understand that the Milky Way rotates differentially, meaning objects closer to the center rotate faster than those farther out. Astronomers can use a rotation curve to determine the expected velocity for a given distance from the galactic center.
Step 3: Compare the measured radial velocity with the expected velocity from the rotation curve. The difference between these velocities allows astronomers to calculate the angle between our line of sight and the cloud's actual path of motion.
Step 4: Apply trigonometry to determine the distance between us and the cloud using the angle and the known distances to other reference points within the Milky Way.
In summary, knowing the velocity of a cloud in the disk of the Milky Way helps astronomers figure out how far away it is by allowing them to use the Doppler effect, galactic rotation principles, and trigonometry to calculate its distance.

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Since these three vehicles would all go the same speed at the bottom if released from the same height, they would not all possess the same amount of kinetic energy because they have different amounts of potential energy.

Kinetic energy is dependent on the velocity of the object as well as its mass. Therefore, the three vehicles, though they have the same speed, would differ in their kinetic energy due to their varying mass. This concept is known as mechanical energy and is the sum of kinetic and potential energy.

Mechanical energy is also constant in an ideal situation where no external forces are acting upon the object. For instance, the three vehicles will all have the same mechanical energy at the release point but would not possess the same amount of kinetic energy due to their mass difference. Therefore, they would have different amounts of potential energy when released.

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Answer:

Explanation: it’s important because it teaches about push an pull and motions, I’m Law 1,2, and 3

The smallest particle size a scientist can observe using a scanning probe microscope would be a nanometer, therefore the correct answer is option B.

A recognized and accepted standard for measuring other amounts of the same sort is referred to as a unit of measurement. It is predetermined by custom or law.

As given in the problem, we have to find out what is the smallest particle size a scientist can observe using a scanning probe microscope.

1 millimeters = 1 × 10 ⁻³ meter

1 nanometer = 1 × 10⁻⁹  meters

Thus, the smallest particle size a scientist can observe using a scanning probe microscope would be a nanometer, therefore the correct answer is option B.

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Answer:

Acceleration(a)=21.60 km/h or 21,600 m/s

Explanation:

Since you have the initial velocity(0, because it starts from rest) and the final velocity 72 km/h or 72,000 m/s. so...

\(a=\frac{Vf-Vi}{t}\\ a=\frac{72,000 m/s-0}{2s}\\ a=\frac{72,000 m/s}{2s}\\ a=36,000m/s or 36 km/h\)

The energy density (energy per unit volume) at a given location in space can be calculated by multiplying it by the energy's velocity. The units of power are split by the resulting vector's area.

What is an illustration of intensity?

The degree, volume, or magnitude of something is its intensity. Examples include fire, emotion, weather, work, or passion. The word "intensity" is occasionally linked to fervor, fire, and violence. It is employed when describing the intensity of something like a flame or possibly a love affair.

What is the level of scientific rigor?

The intensity of a wave is the amount of energy it transports over a surface in a unit of time and area. It is also equal to the energy density times the wave speed. Watts per square meter are typically used to measure it. A wave's strength and amplitude will affect intensity.

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The main sequence lifetime of a star with a mass of 1.75 solar masses and 8.7 solar luminosities is approximately \(3.0 * 10^1^0\) years.

The main sequence lifetime of a star depends on its mass and luminosity. For a star with a mass of 1.75 solar masses and a luminosity of 8.7 solar luminosities, we can estimate its main sequence lifetime. The main sequence lifetime refers to the time a star spends fusing hydrogen into helium in its core, which is the longest and most stable phase of a star's life.

Using stellar models and calculations based on stellar evolution theory, astronomers have determined that stars with a mass of 1.75 solar masses and a luminosity of 8.7 solar luminosities have a main sequence lifetime of approximately \(3.0 * 10^1^0\) years. This means that the star will spend about 30 billion years in the main sequence phase before undergoing further evolution.

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Explanation:

Are the compounds formed by the ionic bonding or electronic bonding. They are formed by transferring the electron form one element's valance shell to other element's shell.

i hope it helps...

Answer:

It would move in a line tangent to the circular path

Explanation:

After a gamma ray is produced in the core of the sun, it will typically travel outward through the layers of the sun's interior. As it moves through these layers, it will likely interact with other particles and lose energy. Eventually, it will reach the sun's surface and be emitted into space as part of the sun's overall radiation output.

A gamma ray is produced in the core of the sun. After that, the gamma ray goes through several processes, including:

1. Photon Scattering: The gamma ray, being a high-energy photon, interacts with charged particles like protons and electrons in the solar core, changing direction and losing energy through scattering.

2. Conversion to Lower-Energy Photons: As the gamma ray scatters and loses energy, it is converted into lower-energy photons, such as X-rays, ultraviolet, visible light, and infrared radiation.

3. Radiative Transfer: Lower-energy photons gradually make their way to the outer layers of the sun through a process called radiative transfer, which involves multiple scattering events and absorption/re-emission processes.

4. Reaching the Photosphere: The photons eventually reach the photosphere, which is the visible surface of the sun. This process takes thousands of years due to the numerous interactions the photons go through during their journey.

5. Emission into Space: Once the photons reach the photosphere, they are emitted as sunlight and travel through space, eventually reaching Earth and other celestial bodies.

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Answer:

Solid, Liquid and Gas

Explanation:

They are the 3 states or stages of Matter

Answer:

______________________________

use tall safety and position hoist arms

Answer:

The ball would hit the floor approximately \(0.55\; \rm s\) after leaving the table.

The ball would travel approximately \(5.5\; \rm m\) horizontally after leaving the table.

(Assumption: \(g = 9.81\; \rm m \cdot s^{-2}\).)

Explanation:

Let \(\Delta h\) denote the change to the height of the ball. Let \(t\) denote the time (in seconds) it took for the ball to hit the floor after leaving the table. Let \(v_0(\text{vertical})\) denote the initial vertical velocity of this ball.

If the air resistance on this ball is indeed negligible:\(\displaystyle \Delta h = -\frac{1}{2}\, g\, t^{2} + v_0(\text{vertical}) \cdot t\).

The ball was initially travelling horizontally. In other words, before leaving the table, the vertical velocity of the ball was \(v_0(\text{vertical}) = 0 \; \rm m \cdot s^{-1}\).

The height of the table was \(1.5\; \rm m\). Therefore, after hitting the floor, the ball would be \(1.5\; \rm m \!\) below where it was before leaving the table. Hence, \(\Delta h = -1.5\;\rm m\).

The equation becomes:

\(\displaystyle -1.5 = -\frac{9.81}{2} \, t^{2}\).

Solve for \(t\):

\(\displaystyle t = \sqrt{1.5 \times \frac{2}{9.81}} \approx 0.55\).

In other words, it would take approximately \(0.55\; \rm s\) for the ball to hit the floor after leaving the table.

Since the air resistance on the ball is negligible, the horizontal velocity of this ball would be constant (at \(v(\text{horizontal}) =10\; \rm m \cdot s^{-1}\)) until the ball hits the floor.

The ball was in the air for approximately \(t = 0.55\; \rm s\) and would have travelled approximately \(v(\text{horizontal})\cdot t \approx 5.5\;\rm m\) horizontally during the flight.

Answer:

9896

Explanation:

multiply them all together

As the velocity of a stream carrying a mixture of particles decreases, the heaviest particles will most likely be deposited first. This phenomenon is known as sedimentation.

The process of sedimentation separates particles of different sizes and densities from a mixture by allowing them to settle at different rates due to gravity. The heavier particles settle faster than lighter ones. Therefore, they are the first to be deposited.Sedimentation can occur naturally or artificially. For example, in a river, sedimentation can occur naturally due to changes in water flow and velocity. Artificial sedimentation can be used in water treatment plants to remove impurities from water

The heaviest particles will most likely be deposited first as the velocity of a stream carrying a mixture of particles decreases.Explanation: This is due to the process of sedimentation, which separates particles of different sizes and densities from a mixture by allowing them to settle at different rates due to gravity. The heavier particles settle faster than lighter ones, and hence they are the first to be deposited.

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Answer:

because mars is far

Explanation:

so if he shouts louder than he will hear it quicker

Answer:

Yes,it can be mixed.

Explanation:

Answer:

T is less than or equal to 19 N

Explanation:

Sound waves requires a medium (material) to vibrate in order to produce a sound. So sound waves cannot travel in outer space as it is vacuum.

The moon remains in orbit around earth because of gravitational energy

Data;

Moon and other centripetal bodies maintain a state of constant orbit or centripetal acceleration because of gravitational energy.

The gravitational energy acting on the moon keeps the body rotating. This is further elaborated by Einstein's theory of relativity.

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Answer:

3.88 m/s North

Explanation:

We are given that

\(m_1=136kg\)

\(m_2=100 kg\)

\(v_1=6 m/s\)

\(v_2=1m/s\)

We have to find  the speed and direction of the two players

immediately after the tackle.

Using linear conservation of momentum

\(m_1v_1+m_2v_2=(m_1+m_2)v\)

Substitute the values

\(136\times 6+100\times 1=(136+100)v\)

\(916=236v\)

\(v=\frac{916}{236}\)

\(v=3.88m/s\)

Direction of  the two players  immediately after the tackle is North.