True or false: The quantity represented by θ is a function of time (i.e., is not constant).

true
false

The net force on particle q2 can be calculated by finding the net electric force acting on it. The net electric force acting on a particle is the vector sum of the forces exerted by all the other charges on it.

The electric force between two charges q1 and q2 is given by Coulomb's law: F = k * (q1 * q2)/r^2, where k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between them.

The force on particle q2 due to q1 will be:

F1 = k * (q1 * q2) / (0.980m)^2

The force on particle q2 due to q3 will be:

F2 = k * (q2 * q3) / (0.750m)^2

The net force acting on q2 will be the vector sum of F1 and F2.

Keep in mind, q1 and q3 have opposite charges, so they attract each other, while q2 has the same charge as q1, so they repel each other.

Note: The unit of charge is Coulomb (C), but in this problem you are given the charges in microCoulomb (uC) so you need to convert it to Coulomb.

0.08 m/s2 is the average acceleration. The acceleration's degree of uncertainty is 0.0135 m/s2.

Accelerations are included in vector quantities. An object's acceleration in relation to a net force is determined by the direction of that force. Force imbalances lead to acceleration in a body.

Uniform, non-uniform, and average acceleration are the three primary types of accelerated motions. It is said to have uniform acceleration when an object moves in a straight line with an increase in speed that happens at regular intervals of time.

Acceleration is the term used to describe any change in the speed or direction of a motion. Anything that is accelerating is moving faster, slower, or in a direction other than straight forward.

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Abby volunteers at the planetarium at the museum of natural history. she is putting together a presentation about the solar system in which she will describe the shape of the solar system. she uses the term orbital plane when she discusses the plane in which the planets orbit.

The space that connects the centers of the orbiting objects and the object being orbited is known as an orbital plane and is formed like a flat, disk. Planets in our solar system avoid colliding with one another because their orbital planes are similar.

A rotating body's orbit is located in a geometric plane called the orbital plane. An orbital plane can be identified using just three non-collinear points in space. The locations of the centers of an orbiting celestial body and a large body (the host) at two different times or points in its orbit are typical examples.

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Answer:

Option B

"Packets" of electromagnetic energy eject electrons.

Explanation:

A photon is a tiny packet of light. Light as we know is a form of electromagnetic energy. Whenever light is incident on a photoelectric surface, the energy of the light wave gets transferred to the electron, causing it to have enough energy to eject electrons from its surface. The electrons, once ejected, are now free to move about, thus, resulting in the flow of electrical current.

This makes option B the correct answer

True. When you learn something new neurons make connections and retain that knowledge. That means the more you learn a skill the more connections you make and the more muscle memory you get from doing that skill. Thus you get better at that skill.

Answer:

true

Explanation:

Answer:

not really, by the time you get to your car it would have already hit you in the head and knock you plum out.

Explanation:

No.

And add me as friend.

Answer:

No machine is 100% efficient

Explanation:

Energy is always lost to heat, friction, or otherwise to the surroundings.

Answer:

real life is not perfect and some energy is lost as heat, so a practical transformer can never have 100% efficiency

Explanation:

Gamma rays are forms of electromagnetic radiation that are produced from the decay of atomic nuclei. These waves have the shortest wavelength and the highest frequency in the electromagnetic spectrum. Gamma rays are highly penetrating and can easily pass through thick layers of material. Gamma rays are also used in various applications like radiotherapy, industrial radiography, nuclear medicine, and radiation sterilization.

Particle accelerators are devices that use electromagnetic fields to accelerate charged particles to high energies. The energy gained by the charged particle is used for various purposes like nuclear research, medical applications, etc. There are several types of particle accelerators, including linear accelerators (linacs), cyclotrons, synchrotrons, etc. The particles that can be accelerated include protons, electrons, and ions, among others. Based on the above information, the particle that is referenced in Table O besides gamma ray, which cannot be accelerated by a particle accelerator, is not provided. Therefore, it is impossible to determine the particle that cannot be accelerated by a particle accelerator from the given data in question.

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Answer:

now it lets me. B

Explanation:

hope that helps

The cost of staffing work schedules is a topic covered by the economics subfield of ergonomics. An operations chart, often known as a right-hand/left-hand chart, highlights unnecessary movement and downtime.

Employees' working conditions may impact their quality of life, but it has little bearing on how well they perform or how safe they are.

Extent flexibility is the type of flexibility required when a profession necessitates extremely wide motions.

In jobs dispersed over longer time periods, extent flexibility is essential whereas dynamic flexibility is needed for shorter time periods.

Simple movements, using movement as the main method in physical education.

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Answer:

133m/s

Explanation:

b/c 250÷2.2÷0.85=133

Examine the free body diagrams below.

b. Block 3

c. Block 4

d. Block 1

Answer:

The answer is BLOCK 2

Explanation:

The force exerted by the upper leg on the lower leg at the knee joint is directed inward or towards the center of the knee joint.

When you hold your leg in a position, such as when standing or sitting with your knee bent, there is a force being exerted at the knee joint. This force is generated by the muscles and tendons in the upper leg, such as the quadriceps and hamstrings, and is transmitted to the lower leg through the patellar tendon. The direction of this force is typically inward or towards the center of the knee joint.

This inward force is essential for maintaining stability and balance in the knee joint. It helps to counteract the external forces and loads applied to the leg during various activities such as walking, running, or jumping. The force distributes the weight and stress evenly across the joint, preventing excessive pressure on any specific area.

It's important to note that the direction of the force can vary depending on the specific leg position and the actions being performed. For example, during activities like kicking or twisting motions, the force exerted on the knee joint may have different directions. However, in a static position where the leg is being held, the primary direction of the force is inward, providing stability and support to the knee joint.

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The velocity with which the electrons drift in the silver wire is approximately 1.58 x 10^-4 m/s.

To find the velocity with which electrons drift in a silver wire, we can use the formula:

I = nAvq

where:

I is the current (in amperes),

n is the number of free electrons per unit volume (in m^3),

A is the cross-sectional area of the wire (in m^2),

v is the drift velocity of electrons (in m/s), and

q is the charge of an electron (approximately 1.6 x 10^-19 C).

Given:

I = 5.0 A (current)

n = 5.8 x 10^28 m^-3 (number of free electrons per m^3)

A = πr^2 = π(0.002 m)^2 (cross-sectional area)

q = 1.6 x 10^-19 C (charge of an electron)

First, we calculate the cross-sectional area of the wire:

A = π(0.002 m)^2 = 1.2566 x 10^-5 m^2

Next, we rearrange the formula and solve for v:

v = I / (nAq)

v = 5.0 A / (5.8 x 10^28 m^-3 * 1.2566 x 10^-5 m^2 * 1.6 x 10^-19 C)

v ≈ 1.58 x 10^-4 m/s

Therefore, the velocity with which the electrons drift in the silver wire is approximately 1.58 x 10^-4 m/s.

The drift velocity represents the average velocity at which the electrons move in the wire under the influence of an electric field. It is relatively small due to frequent collisions with lattice ions and other electrons within the wire.

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Answer:

51 miles/hour

Explanation:

Talia is on a road trip with some friends. in the first 2 hours, they travel 100 miles. then they hit traffic and go only 30 miles in the next hour. the last hour of their trip, they drive 75 miles. calculate the average speed of talia’s car during the trip. give your answer to the nearest whole number.

The average speed would be 51 miles/hour.

The average speed of a moving object is defined as the total distance traveled relative to the total time taken fro the journey. Mathematically, it is given as:

  total distance traveled/total time taken.

In this case;

Total distance traveled = 100 + 30 + 75 = 205 miles

Total time taken = 2 + 1 + 1 = 4 hours

Therefore;

Average speed = 205/4 = 51.25 miles/hour

To the nearest whole number = 51 miles/hour

The last magnetic reversal occurred around 780,000 years ago.

Geomagnetic reversal is a change in the planet's magnetic field, which means the position of magnetic north and sound are interchanged. It's caused by the rotation of the planet that caused buoyant fluid to rise in curved trajectories. The reversals occur at random. Scientists have known that there have been 183 reversals over the last 83 million years, with the latest occurring around 780,000 years ago (called the Brunhes-Matuyama reversal).

The image below is a supercomputer model of the Earth's magnetic field created by NASA. The left one is a normal magnetic field, and the right one is the magnetic field during the upheaval of a reversal.

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Answer:An object having balanced forces definitely cannot be accelerating.

The frictional force reduces the block's kinetic energy and causes negative work to be done on it.

Kinetic energy is the energy that a thing has when it is moving. An item can only be accelerated through the application of a force. Applying force requires effort on our part. Following completion of the work, energy is transferred towards the object, which then moves at such a new, constant speed.

Kinetic energy appears to be the driving force behind motion, as evidenced by the way objects and subatomic particles move. Every particle & moving object contains kinetic energy. Examples of kinetic energy in motion include walking, a baseball flying through the air, food falling off a table, and just a charged particle within an electric field.

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The average speed of the horse is 2.5 m/s

The average speed of the horse can be calculated using the formula below.

This can be defined as the ratio of distance to time. the S.I unit is m/s.

From the question,

Substitute these values into equation 1

Hence, The average speed of the horse is 2.5 m/s

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Answer:

100.390407

Explanation:

To find acceleration, you would use the formula a=f/m (acceleration equals force divided by mass) and then once you enter those numbers in the formula, a=180/1.793. Then you divide 180 divided by 1.793 which gets you an answer of 100.390407.

The mechanism that causes the air to rise and cool on the windward side of the mountain range is convection, which plays a significant part in creating the rain shadow effect.

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Answer:

solid

Explanation:

it's not liquid, nor gas, so solid.

Answer:

it's 220 J

the second one

Answer:

a.  653.79 kgm²/s b. 440 Nm

Explanation:

a. The initial angular momentum

The initial angular momentum L of the boy and merry-go-round is

L = Iω where I = moment of inertia of merry-go-round + moment of inertia of Lindsey about merry-go-round and ω = initial angular velocity = 3.45 rad/s

moment of inertia of merry-go-round I₁ = 1/2MR² where M = mass of merry-go-round = 78 kg and R = radius of merry-go-round = 2.20 m

I₁ = 1/2MR² = 1/2 × 78 kg ×(2.20 m)² = 188.76 kgm²

moment of inertia of Lindsey about merry-go-round I₂ = mh² where m = mass of boy = 33.0 kg and h = distance of Lindsey from center of merry-go-round = 0.150 m

I₂ = mh² = 33.0 kg × (0.150 m)² = 0.743 kgm²

I = I₁ + I₂ = 188.76 kgm² + 0.743 kgm² = 189.503 kgm²

So, L = Iω = 189.503 kgm² × 3.45 rad/s = 653.79 kgm²/s

b. How much torque does Mike apply?

Since torque τ = FRsinθ where F = force = 200 N, R = radius of merry-go-round = 2.20 m and θ = 90° (since the force is applied tangentially to the merry-go-round)

τ = FRcosθ

= 200 N × 2.20 m × sin90°

= 440 Nm

Answer:

800 N

Explanation:

The formula to solve this equation is stress = Force/ Area.

The first step is to rearrange this equation for force: Force = stress * area

The second step is to determine the area: A = pi/4 * d^2

A = pi/4 * (0.0016m)^2=0.00000201 m^2

The third step is to substitute the area back into the equation:

Force = (4 * 10^8)(0.00000201) = 804 N

804 N is approximately 800 N

Answer:

0.012

Explanation:

Answer:

6 m/s^2

Explanation:

F = ma

60N = (10 kg)a

a = 6m/s^2