Magnetic field of the Sun is causing all of the below except: sunspots flares granulation coronal mass ejection prominences

The ratio of time of flight for inelastic collision to elastic collision \((t_A :t_B)\) is 1:2

The given parameters;

Considering inelastic collision, the final velocity of the system is calculated as;

\(m_1u_1 + m_2u_2 = v(m_1 + m_2)\\\\m_1u_1 + 0 = v(m_1 + m_2)\\\\v= \frac{m_1u_1}{m_1 + m_2} \ -- (1)\\\\\)

The time of motion of the system form top of the table is calculated as;

\(v = u + gt\\\\v = 0 + gt\\\\v = gt\\\\t= \frac{v}{g} \\\\t_A = \frac{m_1u_1}{g(m_1 + m_2)} \ \ ---(2)\)

Considering elastic collision, the final velocity of the system is calculated as;

\(m_1u_1 + m_2 u_2 = m_1v_1 + m_2v_2\\\\m_1u_1 + 0 = m_1v_1 + m_2v_2\\\\m_1 u_1 = m_1v_1 + m_2v_2\)

Apply one-directional velocity

\(u_1 + (-v_1) = u_2 + v_2\\\\u_1 -v_1 = 0 + v_2\\\\v_1 = v_2 -u_1\)

Substitute the value of \(v_1\) into the above equation;

\(m_1u_1 = m_1(v_2 - u_1) + m_2 v_2\\\\m_1u_1 = m_1v_2 -m_1u_1 + m_2v_2\\\\2m_1u_1 = m_1v_2 + m_2v_2\\\\2m_1u_1= v_2(m_1 + m_2)\\\\v_2 = \frac{2m_1u_1}{m_1+ m_2} \ --(3)\)

where;

\(v_2\) is the final velocity of the block after collision

Since the bullet bounces off, we assume that only the block fell to the ground from the table.

The time of motion of the block is calculated as follows;

\(v_2 = v_0 + gt\\\\v_2 = 0 + gt\\\\t = \frac{v_2}{g} \\\\t_B = \frac{v_2}{g} \\\\ t_B = \frac{2m_1u_1}{g(m_1 + m_2)} \ \ ---(4)\)

The ratio of time of flight for inelastic collision to elastic collision is calculated as follows;

\(\frac{t_A}{t_B} = \frac{m_1u_1}{g(m_1 + m_2)} \times \frac{g(m_1 + m_2)}{2m_1u_1} \\\\\frac{t_A}{t_B} = \frac{1}{2} \\\\t_A:t_B = 1: 2\)

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Explanation:

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Answer:

microwaves

Explanation:

Among the following, the wave which is not an example of the electromagnetic wave is water wave. Thus, the correct option is B. Explanation: Electromagnetic waves are produced as a result of the vibrations between the electric and magnetic fields. Examples of electromagnetic waves are X-ray, lightwave, radio wave, microwave, etc.

Answer:

Following are the answer to this question:

Explanation:

The wave is propagating at the incident wave which focuses on the stretchy and rotational inertia features of the whole medium via a material system.  For both the mechanical waves there are many two basic types of incident waves: quality management program and transverse waves.

The rumor is also known as the "Norman Rockwell", in which the environment of some of the greatest physics attempts of our time, it pays to remain suspicious when remarkable reports of historical findings are made on social media.

The net gravitational force will be 9 units.

Therefore, as the mass of either object increases, the attractive force between them also increases. When the mass of either object doubles, the gravitational force between them doubles. Acts along the connecting lines of the particles. where G is the constant of proportionality, a universal constant.

When the mass of an object doubles the force between the objects also doubles. Gravity is directly dependent on the mass of two objects and is inversely proportional to the square of the distance between them. This means that gravity increases with mass and decreases with increasing distance between objects.

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The statement that is true if matter undergoes both chemical and nuclear reaction is that atoms are rearranged (option A).

A chemical reaction is a process, typically involving the breaking or making of interatomic bonds, in which one or more atoms or substances are changed into others.

Also, a nuclear reaction is a process such as the fission of an atomic nucleus, or the fusion of one or more atomic nuclei and/or subatomic particles in which the number of protons and/or neutrons in a nucleus changes.

In a nuclear reaction, the products may contain a different element or a different isotope of the same element.

This suggests that are atoms are rearranged in both chemical and nuclear reactions.

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Answer:

Force

Explanation:

F = G M.m/r²

F = force, N

G = gravitational constant,  6.67 x 10⁻¹¹ Nm²/kg²

m,M = mass of object,  kg

r = distance, m

F = 6.67 x 10⁻¹¹ x 69.3 x 52/1.2²

F = 1.669 x 10⁻⁷

Answer:

V=u + at

V= final velocity

U= Initial velocity

a= acceleration

t= time taken

V= 5 + 30*2

V=5+60

V=65m/s

Explanation:

Answer: When the interference is constructive, this is shown as a bright band on the screen. When the interference is destructive, this is shown as a dark band on the screen.

Explanation: edge 2021

Answer:Bright and Dark

Explanation:

Answer:

it would be c

Explanation:

its the only one that makes sence

The magnitude of the impulse applied to stop the snowboarder is approximately 1872 N*s.

To calculate the magnitude of the impulse applied to stop the snowboarder, we can use the formula:

Impulse = Force * Time

Given that the braking force is 267 N and the braking time is 7.01 seconds, we can calculate the impulse as follows:

Impulse = 267 N * 7.01 s ≈ 1872 N*s

Therefore, the magnitude of the impulse applied to stop the snowboarder is approximately 1872 N*s.

So the correct option is 1872 N*s.

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The commutator reverses the flow of current in an electric motor.

In an electric motor, the commutator plays a crucial role in reversing the direction of the current flowing through the motor's coils. The commutator is a segmented metal ring that is typically made of copper or a copper alloy. It is mounted on the rotor or armature shaft of the motor.

As the rotor spins within the motor's magnetic field, the commutator brushes, which are usually made of carbon or graphite, maintain contact with the segments of the commutator. These brushes provide the electrical connection between the motor's power supply and the rotating coils on the armature.

The commutator segments are arranged in such a way that they ensure the current flow through the motor's coils is reversed at the appropriate moments. This reversal of current direction in the coils creates a changing magnetic field, which interacts with the fixed magnetic field of the motor, resulting in the rotation of the rotor.

By reversing the flow of current in the coils, the commutator allows the motor to continuously rotate in a single direction. Without the commutator's function of reversing the current, the motor would not be able to generate continuous rotational motion.

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Answer:

The commutator reverses the flow of current in an electric motor.

Explanation:

I got it right

Answer:

it can be built in mine craft

Explanation:

Answer:

put 2 pistons on each side and then put the block you want the door to be and power it with redstone

The acceleration of the ball as it slides down the incline is (5/2)g sin θ. Correct answer is d.

The potential energy of the ball at the top of the incline is converted to kinetic energy at the bottom of the incline. Therefore, we can equate the potential energy at the top to the kinetic energy at the bottom:

mgh = (1/2)mv²

where m is the mass of the ball, g is the acceleration due to gravity, h is the height of the incline, and v is the velocity of the ball at the bottom of the incline.

We can rewrite the equation as:

v² = 2gh

The moment of inertia of the ball is (2/5)MR², where M is the mass of the ball and R is the radius of the ball. The torque acting on the ball as it rolls down the incline is due to the force of gravity acting on the center of mass of the ball. The moment of inertia and torque allow us to determine the angular acceleration of the ball.

τ = Iα

where τ is the torque, I is the moment of inertia, and α is the angular acceleration. The torque acting on the ball is given by:

τ = mgh sin θ

where θ is the angle of the incline.

Substituting the moment of inertia and torque into the equation for angular acceleration:

mgh sin θ = (2/5)MR² α

α = (5/2)g sin θ / R

The linear acceleration of the ball down the incline is equal to the product of the angular acceleration and the radius of the ball:

a = αR = (5/2)g sin θ

Therefore, the answer is (d).

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--The complete question is, A ball with (2/5)MR^2 is released from rest at the top of an incline of height, h at an angle θ. There is no friction between the ball and the surface of the incline. What is the acceleration of the ball as it slides down the incline?

a. g/2

b. g sinθ

c. 2g cos θ

d. (5/2)g sin θ

e. 0--

Answer:

Pressure

Explanation:

One of the theories propounded by the Kinetic molecular theory, and which also provides an explanation of the several gas laws, is the statement that the gas molecules in a container, travel in straight lines and are in constant collision with themselves and the walls of the container, thus exerting force. This force is the pressure which is defined as the force per unit area.

There is no loss of energy in the collisions involving the gas molecules and that is why their movement can be described as elastic. The descriptions of the behavior of gas molecules in the Kinetic Molecular Theory, give rise to Charles law, Boyle's Law, Avogadro's Laws, Dalton's Law, and Amonton's Law.

Answer:

The pressure

Explanation:

Molecules of gases are constantly in motion, colliding with the walls of their container. This constant collision impacts force on the walls of the container, which depends on the speed with which the molecules are moving. The speed with which these molecules travel depends on the average kinetic energy of the molecules, which is proportional to the temperature.

This force when exerted per unit area is the pressure the gases exert on the walls of the container.

The mass flow rate of water is 0.087 Kg/s.

Contact tube diameter means no pressure head drop.

P=C heating done at P=C.

MC(T₁ - T₂) = Q = W

M × 1.015 (360-315) = 4000

M = 4000 / 1.015 × \(10^{3}\) × 45

M = 0.087 Kg/s

Pressure is defined due to the fact the pressure of all the gasoline particle/wall collisions divided thru the vicinity of the wall: All gases exert strain ; it's far one of the important measurable portions of this phase of depend.

From the weather to air tour, strain performs a dramatic position in our lives. It plays especially vital roles at some point of chemical reactions. through manipulating stress, chemists can pressure chemical reactions to occur and the transitions among solids, beverages, and gases to boost up.

The primary unit of pressure is the pascal, described because the stress exerted with the useful resource of a pressure of one newton perpendicularly upon a place of one square meter.

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The time taken for the passenger jet to move from 5 km/h to 460 km/h on the run way during the take off is 10.03 s

From the question given above, the following data were obtained:

The time taken for the the passenger jet to move from 5 km/h to 460 km/h can be obtained as follow:

a = (v – u) / t

12.6  = (127.78 – 1.39) / t

12.6 = 126.39 / t

Cross multiply

12.6  × t = 126.39

Divide both sides by 12.6

t = 126.39 / 12.6

t = 10.03 s

Thus, we can conclude that the time taken is 10.03 s

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Answer:

They are called beneficial mutations. They lead to new versions of proteins that help organisms adapt to changes in their environment. Beneficial mutations are essential for evolution to occur. They increase an organism's changes of surviving or reproducing, so they are likely to become more common over time.

Explanation:

The following data can be converted to the engineering notation as the following. (a) 0.045 W is 45 mW. (b) 2000 pJ is 2nJ. (c) 0.1 ns is 100 pS (d) 39,212 as is 39.212 fs (e) 3 \Omega3Ω is 3Ω (f) 18,000 m is 18 km (g) 2,500,000,000,000 bits is 2.5 terabits (h)  0^{15} \text { atoms } / \mathrm{cm}^{3}10 15atoms /cm 3 is \(10^{21} \frac{atoms}{m^{3} }\).

Engineering notation is the representation of expressing the numbers that are too big or too small and are represented in the decimal form times 10 raise to the power.  It is similar to the scientific notation but in engineering notation, the powers of ten are always multiples of 3.

Using scientific notation, one can express extremely big or extremely small values. When a number between 1 and 100 is used, it is written in scientific notation.

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A fluctuating needle could indicate a variety of issues, including mechanical or electrical problems with the gauge, an issue with the system being measured, or environmental variables affecting the measurement. When a needle is fluctuating, it can be difficult to determine the correct reading. If the needle on the pressure gauge(GP) is fluctuating, read and record the valve located in the center between the high and low extremes.

A pressure gauge is a device that determines and measures the pressure(P) of a gas or liquid in a closed container. A pressure gauge measures pressure by means of a bourdon tube(BT), which is a mechanical system. When pressure is put on it, it deforms. This deformation is calculated by a system of gears and springs and displayed on a dial.

The following are some of the most common types of pressure gauges: Manometer(Mr) is a kind of pressure gauge that works by comparing the pressure of a liquid in a U-shaped tube to the pressure of the gas being measured, which compresses the liquid. Piezometer(Pr) is a form of pressure gauge that works by measuring the weight of the liquid in a container, which is proportional to the pressure being measured. Bourdon Tube: The most common type of pressure gauge is the bourdon tube. It works by comparing the pressure of a gas or liquid in a chamber to a spring inside a tube. Wheel Gauge is a kind of pressure gauge that works by converting pressure into a rotary motion. This rotary motion is measured by a series of gears, which then display the pressure.

What is a fluctuating needle?

A fluctuating needle(FN) is a needle that is not steady on a gauge or instrument.

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Answer:

The velocity of the wave is, v = 180,000 m/s

Explanation:

Given data,

The frequency of the wave, f = 900 Hz

The wavelength of the wave, λ = 200 m

The formula for the speed of the wave when the frequency and wavelength are known,

                               v = λ x f

Substituting the given values in the above equation,

                               v = 200 m x 900 Hz

                                v = 180000 m/s

Hence, the velocity of the wave is, v = 180,000 m/s

Balancing the forces acting on a body is not enough to establish equilibrium because equilibrium also requires the balancing of torques or moments acting on the body.

In physics, equilibrium refers to a state in which an object or system experiences no net force and no net torque. For an object to be in equilibrium, both the forces and the torques acting on it must be balanced.

Balancing the forces means that the vector sum of all the forces acting on the body is equal to zero. This ensures that there is no net force acting on the object, and it will not accelerate in any direction. However, even if the forces are balanced, the object can still rotate or have a tendency to rotate if the torques acting on it are not balanced.

A torque, also known as a moment, is a measure of the tendency of a force to rotate an object about a specific axis. It depends on the magnitude of the force, the distance from the axis of rotation, and the angle between the force and the lever arm. When torques are balanced, the sum of all the torques acting on the object is equal to zero.

To establish equilibrium, both the forces and the torques acting on the body must be balanced. This means that not only should the vector sum of the forces be zero, but also the algebraic sum of the torques should be zero. When both conditions are met, the object will remain at rest or continue to move with a constant rotational motion.

Balancing the forces acting on a body is not enough to establish equilibrium because equilibrium requires the balancing of both forces and torques. Simply balancing the forces ensures that there is no net force acting on the object, but it does not guarantee that the object will be in a state of complete equilibrium. To achieve equilibrium, the torques acting on the object must also be balanced, ensuring that there is no tendency for rotation.

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According to the theory of atomic magnetism, the magnetic effects observed in all atoms are caused by the alignment and motion of electrons.

The theory of atomic magnetism explains that the magnetic effects observed in atoms are a result of the behavior of electrons within the atom. Electrons possess an intrinsic property called "spin," which is a form of angular momentum. This spin gives rise to a magnetic moment associated with the electron.

In an atom, the electrons occupy various energy levels or orbitals around the nucleus. These electrons can have different spin orientations, either up or down. When the spins of multiple electrons align in the same direction, a net magnetic moment is created. This alignment of electron spins can occur in two ways:

Ferromagnetism: In certain materials, such as iron, cobalt, and nickel, the alignment of electron spins persists even in the absence of an external magnetic field. This results in the formation of permanent magnets.

Paramagnetism: In most materials, the alignment of electron spins is random and cancels each other's magnetic effects. However, when an external magnetic field is applied, the spins tend to align partially with the field, resulting in a weak attraction to the magnetic field. This phenomenon is called paramagnetism.

In both cases, the magnetic effects observed in atoms are directly attributed to the alignment and motion of electrons.

The theory of atomic magnetism explains that the magnetic effects observed in all atoms are caused by the alignment and motion of electrons. The spins of electrons give rise to magnetic moments, and when these moments align, they produce magnetic effects such as ferromagnetism or paramagnetism.

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The  answer to the question is option A, which states that the additional water available from a hydrant is determined by the difference between static pressure and residual pressure.



Static pressure refers to the pressure in a water system when there is no water flowing. Residual pressure, on the other hand, refers to the pressure that remains in the system while water is flowing. The difference between these two pressures is what determines how much additional water can be obtained from a hydrant.

Option B, which mentions the difference between friction loss and current water pressure, is not directly related to determining the additional water available from a hydrant.

Option C, which states the difference between static pressure and atmospheric pressure, is also not relevant as atmospheric pressure does not play a role in determining the additional water available from a hydrant.

Option D, which suggests the sum of static pressure, residual pressure, and atmospheric pressure, is also not accurate as atmospheric pressure is not a factor in this calculation.

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Answer:

Explanation:

just use the gravational force equation which is G x m of earth x m of object divided by r squared (which is radius of earth)