an object moves with constant speed of 2 m/s in circular motion with a radius of 5 meters. what is the angular velocity of this object?

Answer:

D.

Explanation:

Force and distance are inversely related, so a greater distance results in a weaker force.

Answer:

Car D

Explanation:

Answer:

The corect answer is car D hope this helped (:

Explanation:

The skateboarder needs to regularly push with their foot when skateboarding along a level surface because of the presence of frictional forces that oppose motion. When the skateboarder gives themselves a push, they increase their forward velocity.

The skateboarder needs to regularly push with their foot when skateboarding along a level surface because of the presence of frictional forces that oppose motion. When the skateboarder gives themselves a push, they increase their forward velocity. However, over time, the velocity decreases due to the force of friction between the skateboard's wheels and the ground, which acts in the opposite direction to the skateboard's motion. During a push, the skateboarder exerts a force on the skateboard that propels it forward. Between pushes, the skateboard moves at a constant velocity due to the balanced forces acting upon it. However, as frictional forces act on the skateboard, it slows down until the next push is required. The net force acting on the skateboarder is unbalanced, as the force of friction acting against the skateboard's motion is greater than the force of the skateboarder's push. The resulting net force causes the skateboarder to slow down over time. Thus, by pushing themselves, the skateboarder overcomes the force of friction and maintains their forward motion.

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The correct answer is option d. In a single component of an electromagnetic plane wave, the electric and magnetic fields are perpendicular to each other and are both parallel to the propagation direction.

This means that the magnetic field is oriented perpendicular to the electric field and the direction of wave propagation is perpendicular to both the electric and magnetic fields. This relationship is known as the right-hand rule, where if you curl the fingers of your right hand in the direction of the electric field, then the direction of your thumb represents the direction of the magnetic field, and the direction of your palm represents the direction of wave propagation. The electric and magnetic fields are perpendicular to one another and to the direction of propagation in a single component of an electromagnetic plane wave. Transverse wave propagation is this process. The maximum and minimum values of the electric and magnetic field vectors occur at the same time and place because they are in phase with one another. One of the essential properties of electromagnetic waves is this relative orientation.

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0.77 m/s2 directed 35° south of west

net force = (-17,-12)

net force = mass * acceleration

(-17,-12) = 27 * (x-acceleration,y-acceleration)

(x-acceleration,y-acceleration) = (-17/27,-12/27) = (-0.629629629..., -0.444...)

angle of acceleration = tan^-1 (-0.444.../-0.629629...) = 35.21759 degrees below negative x-axis.

magnitude of acceleration = sqrt((-0.629629...)^2 + (-0.444...)^2) = 0.77069 (5dp)

Answer:

Reflected

Explanation:

During the process of reflection whatever that is sent forth e.g light comes back (reflects)

Answer:

transmitted

Explanation:

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By definition, Weight is a measure of the force of gravity pulling down on an object. it is measured in newtons (N), the common unit for measuring force.

Weight is called the action exerted by the force of gravity on the body.

The mass (amount of matter that a body contains) of an object will always be the same, no matter where it is located. Instead, the weight of the object will vary according to the force of gravity acting on it.

The formula that allows you to calculate the weight of any body is:

P = m×g

where:

Then, the weight of an object is the force of gravity on the object, that is, the weight will vary according to the force of gravity that acts on it. So the correct answer is:

Weight is a measure of the force of gravity pulling down on an object. it is measured in newtons (N), the common unit for measuring force.

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Answer: The table that would organize and summarize the class data on pH levels of the different soil types is found in the attachment below.

Explanation: As an A+ student, I love to help people on brainly in my free time! If this answer helped you, please click the heart, click the crown to give brainliest and give a 5 star rating! I'd appreciate it if you did at least one of those <3 Have a great day.

Answer:

40KJ

Explanation:

m=200g

V=20m/s

Ek=?

Ek=(m*V²)/2

Ek=(200*20²)/2

Ek=(200*400)/2

Ek=80 000/2

Ek=40 000 J =40KJ

Answer:

Velocity as a Vector Quantity

=Because the person always returns to the original position, the motion would never result in a change in position. Since velocity is defined as the rate at which the position changes, this motion results in zero velocity. ... As such, velocity is direction aware.

Explanation:

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The initial speed of the projectile is 18.5m/s

Projectile motion is the motion of an object thrown into the air under gravity. Examples of projectiles include a fired bullet, a thrown javelin e t.c

When a projectile is launched horizontal, it's horizontal range is given as R = u(√2h/g)

R = 300ft = 91.44meters

h= 120m

therefore 91.44= u( √ 2×120/9.8)

91.44 = u ( √24.49)

91.44 = 4.95 u

divide both sides by 4.95

u = 91.44/4.95

u = 18.5m/s

therefore the speed of the projectile is 18.5m/s

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Answer:

Yes, that is correct, although most velocity is calculated via m/s and therfore you would multiply your 3 hours by 60 twice. Much of the information given is irrelevant and just trying to confuse.

Explanation:

The expression for the acceleration is the same in both cases, indicating that the moment of inertia of the pulley does not affect the acceleration of the masses.

An Atwood's machine consists of two masses connected by a rope that passes over a pulley. The acceleration of the masses can be found by applying Newton's second law to each mass separately. The force due to gravity and the tension in the rope are the only forces acting on the masses.

If we consider the moment of inertia of the pulley, the acceleration can be found using the net forces on each mass. However, if we ignore the moment of inertia of the pulley, the acceleration can be found using the net force on the system. However, the expression for the acceleration is the same in both cases, meaning that the moment of inertia of the pulley does not affect the acceleration of the masses.

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Answer:

let current flow be x

Explanation:

than we know potential difference = energy supply / charge then 120 = 10 /x then x=12 therefore pd = 12 v

Answer:

Trabajo realizado = 600 Nm

Explanation:

Dados los siguientes datos;

Fuerza = 200 Newton

Distancia = 3 metros

Para encontrar el trabajo realizado; Trabajo realizado = fuerza * distancia

Sustituyendo en la ecuación, tenemos; Trabajo realizado = 200 * 3

Trabajo realizado = 600 Nm

For a neutral atom of radon-222, the number of protons is 86, the number of neutrons is 136, and the number of electrons is 86.

A neutral atom can be described as one in which the amount of the positive charge is equal to the of amount the negative charge. Therefore, the net charge on the atom will be equal to zero. Therefore, such type of atom is said to be a neutral atom.

For a neutral atom, we usually say that the number of electrons in an atom is equal to the number of protons. All chemical elements which are arranged in the modern periodic table are in their neutral state.

Given, the atomic number of Radon-22 is 86.

Atomic number = the number of electrons = Number of protons

The number of electrons for the neutral atom of Rn = 86

The number of protons in Rn-222 = 86

The number of neutrons = 222 - 86 = 136

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Answer:

Yes.

Explanation:

Rocket can propel itself in vacuum because the thrust is provided as a reaction to the the gases coming out of rocket, which have nothing to do with vacuum.

The frame of reference you are operating in determines the momentum. The overall momentum will be 0 if you operate in a frame of reference where the center of mass is stationary.

a bomb before explosion does mot have any kind of external forces, and here we see how the momentum does not affected by before Collison.

According to the law of conservation of momentum, the combined momentum of objects that interact stays constant. This implies that the overall momentum prior to  explosion equals the total momentum following a  explosion.

P = mv determines an object's momentum prior to impact.

Its velocity and momentum are unaffected in the absence of an external force prior to the impact.  

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Answer:

An experiment is conducted in which a cart travels across a horizontal surface and collides with a wall. Data collected from the experiment are used to create the graph of the cart's velocity as a function of time. All frictional forces are considered to be negligible. Which data from the graph should the student use to determine the direction of the net force exerted on the cart and the direction of the change in momentum of the cart from the time intervals of A to B?

Explanation:

As we know that

So

Option C is correct

We can use the formula for the centripetal force experienced by a charged particle moving in a magnetic field and when the cosmic ray proton enters our solar system, it experiences an interplanetary magnetic field that is perpendicular to its velocity.

(a) To find the magnetic field in the region of space where the cosmic-ray proton is executing a circular orbit, we can use the formula for the centripetal force experienced by a charged particle moving in a magnetic field. The centripetal force is given by the equation:

F = qvB

Where:
F is the centripetal force,
q is the charge of the particle (in this case, the charge of a proton),
v is the velocity of the particle,
B is the magnetic field strength.

The centripetal force can also be expressed as:

F = mv²/r

Where:
m is the mass of the proton,
v is the velocity of the proton,
r is the radius of the circular orbit.

Equating the two expressions for the centripetal force, we have:

qvB = mv²/r

Rearranging the equation, we can solve for the magnetic field B:

B = mv/rq

Given the energy of the proton (13.0 MeV), we can use the relation between energy and velocity for a particle with rest mass m:

E = mc² = (γ - 1)mc²

Where:
E is the energy of the particle,
m is the rest mass of the particle,
c is the speed of light,
γ is the Lorentz factor.

The Lorentz factor can be expressed as:

γ = E/mc² + 1

Substituting the given energy and rest mass of the proton, we can calculate the Lorentz factor.

Now, we can substitute the values of m, v, and r into the equation for the magnetic field B and solve for B.

(b) When the cosmic ray proton enters our solar system, it experiences an interplanetary magnetic field that is perpendicular to its velocity. In this case, the proton will follow a helical path in the magnetic field.

To find the radius of the proton's circular orbit in this field, we can use the formula for the radius of a helical path in a magnetic field:

r = mv/|q|B

Where:
m is the mass of the proton,
v is the velocity of the proton,
|q| is the magnitude of the charge of the proton,
B is the magnitude of the magnetic field strength.

Substituting the given values of m, v, and B into the equation, we can calculate the radius of the proton's circular orbit in this field.

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Answer:

\(5.8\; {\rm kg\cdot m \cdot s^{-1}}\).

Explanation:

If the mass of an object is \(m\) and the velocity of that object is \(v\), the linear momentum of that object would be \(m\, v\).

Assume that the initial velocity of the mass is positive (\(6.0\; {\rm m\cdot s^{-1}}\).) However, the direction of the velocity is reversed after the impact. Thus, the sign of the new velocity of the object would be negative- the opposite of that of the initial velocity. The new velocity would be \((-4.0\; {\rm m\cdot s^{-1}})\).

Thus, the change in the velocity of the mass would be:

\(\begin{aligned}& (\text{Change in Velocity}) \\ =\; & (\text{Final Velocity}) - (\text{Initial Velocity}) \\ =\; & (-4.0\; {\rm m\cdot s^{-1}}) - (6.0\; {\rm m\cdot s^{-1}}) \\ =\; & (-10\; {\rm m\cdot s^{-1})\end{aligned}\).

The change in the linear momentum of the mass would be:

\(\begin{aligned} & \text{change in momentum} \\ =\; & (\text{mass}) \times (\text{change in velocity}) \\ =\; & 0.58\; {\rm kg} \times (-10\; {\rm m\cdot s^{-1}}) \\ =\; & (-5.8\; {\rm kg \cdot m \cdot s^{-1}})\end{aligned}\).

Thus, the magnitude of the change of the linear momentum would be \(5.8\; {\rm kg \cdot m \cdot s^{-1}}\).

The order of magnitude of the wavelength of the thermally produced photons radiated with the greatest intensity by a nuclear explosion is on the order of \(10^-^1^0 meters\).

The order of magnitude of the wavelength of the thermally produced photons radiated with the greatest intensity by lightning can be found using Wien's displacement law. This law states that the wavelength of maximum intensity is inversely proportional to the temperature.

Given that the temperature of lightning is on the order of \(10^4K\), we can calculate the wavelength as follows:

λ = b/T

where λ is the wavelength, b is Wien's constant (approximately \(2.898 x 10^-^3 mK\)), and T is the temperature in Kelvin.

Plugging in the values, we get:

\(\lambda = 2.898 x 10^-^3 / 10^4\)

\(= 2.898 x 10^-^7 meters\)

Therefore, the order of magnitude of the wavelength of the thermally produced photons radiated with the greatest intensity by lightning is on the order of \(10^-^7 meters\).

For a nuclear explosion with a temperature on the order of  \(10^7K\), we follow the same steps and find:

\(\lambda  = 2.898 x 10^-^3 / 10^7\)

\(= 2.898 x 10^-^1^0 meters\)

Thus, the order of magnitude of the wavelength of the thermally produced photons radiated with the greatest intensity by a nuclear explosion is on the order of 10⁻¹⁰ meters.

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Answer:

16m/s

Explanation:

Mv=mv

5000x8=2500x v

V=5000x8/2500

V=40000/2500

= 16m/s

Newton's second law does apply to a situation in which there is no net force as having a net force of zero will produce an acceleration having 0.  

According to Newton's second law, the acceleration of an object depends upon two variables- the mass of the object and the net force acting on the object. Here, the acceleration of an object is directly proportional to the force acting on it and inversely proportional to the mass of that object. The net force applied is equal to the sum of all the forces acting on an object.

In a situation where the net force applied is zero, the object having a mass would have zero acceleration. This means that the object would have zero velocity and would be constant.

This depicts that Newton's second law can be applied to every situation where there is a net force applied, or not. Even if there is no net force, this law can still be applied.

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\(\quad \quad\quad \huge \underline{\tt{ANSWER᭄}}\)

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\( \blue{ \star}\)Magnetic Energy :

\( \blue{ \star}\)Gravitational Energy :

\( \blue{ \star}\)Nuclear Energy :

\( \blue{ \star}\)Thermal energy :

A 5,560 kg lander (weight does not include fuel) must travel to the surface of the moon and back, requiring a delta-v (change in speed) of 18.7 kilometers per second. If the specific impulse (exhaust velocity, ve) of the rocket is 4.13 kilometers per second, approximately 4,683 kg of fuel will be necessary for the lander to travel to the surface of the moon and back.

According to the Rocket Equation, the amount of fuel necessary can be calculated using the formula:

m_fuel = m0 × (1 - e^(-Δv / ve)),

where:

m_fuel is the mass of the fuel required,

m0 is the initial total mass of the lander (including fuel),

Δv is the change in velocity (delta-v) required for the mission,

ve is the exhaust velocity (specific impulse) of the rocket.

In this case, we have:

m0 = 5,560 kg,

Δv = 18.7 km/s,

ve = 4.13 km/s.

Substituting the given values into the equation, we can calculate the mass of the fuel required:

m_fuel = 5,560 kg × (1 - e^(-18.7 km/s / 4.13 km/s)).

Using a calculator or a mathematical software, we find:

m_fuel ≈ 4,683 kg.

Therefore, approximately 4,683 kg of fuel will be necessary for the lander to travel to the surface of the moon and back, considering the given values for the initial mass, delta-v, and specific impulse.

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Answer:

No

Explanation:

Density determines whether an object sinks or float. if the object is less dense than the medium in which it was submerged, it will float. for example, when you pour oil in water, it floats because water is denser than oil.

The sun is the ultimate source of energy for nearly all of life. plants and certain other organisms convert solar energy into chemical energy through the process of photosynthesis.

Photosynthesis is the process to convert light energy into chemical energy to be used for cellular purposes. Plants and other microorganisms use photosynthesis to get nutrients using sunlight, carbon dioxide and water.

The photosynthesis reactions is represented as follows

Carbon dioxide + water (sunlight)→ glucose + oxygen

Photosynthesis occur in the chloroplasts of the plants or algae. They are located within mesophyll cells of leaves.

The photosynthesis pigments include Chlorophyll a, Chlorophyll b, Xanthophylls, and Carotenoids.

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