What would the speed of a free-falling cell phone be exactly 0.59 seconds after it is dropped
from a student's hand (assuming no air resistance)?

Maybe sea or onshore breeze

It develops due to the difference of air pressure greater by the different temperature of the water and land

The given statement " rotating the tree at branch point 2 would change the relationship between taxa d and a " is True. Because,  Rotating the tree at branch point 2 would change the relationship between taxa d and a.

In a phylogenetic tree, taxa are represented as nodes and branches, with each node representing a common ancestor and each branch representing evolutionary relationships. The placement of taxa on a branch is based on  similarity of their characteristics or genetic sequences. Rotating a tree at a branch point involves changing position of the nodes and branches while maintaining relationship between taxa. In given scenario, rotating  tree at branch point 2 would change order in which the taxa are related to each other .

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If a plot of velocity vs. time has a negative slope, then the acceleration of the system is non-zero and in the opposite direction to the velocity. This negative acceleration can result from forces acting on the system that oppose its motion or from the system losing energy due to friction or other factors.

Velocity is the rate of change of displacement with respect to time. If the velocity vs. time graph has a negative slope, it means that the velocity is decreasing over time. In other words, the object is slowing down. Since acceleration is the rate of change of velocity with respect to time, a negative slope indicates that the acceleration is non-zero and acts in the opposite direction to the velocity.

If the velocity is decreasing, it means that the object is experiencing a deceleration or negative acceleration. This negative acceleration can result from forces acting on the system that oppose its motion or from the system losing energy due to friction or other factors. In either case, the negative slope indicates that the acceleration is in the opposite direction to the velocity, causing the object to slow down.

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Answer:

B. Neutron has no charge

Answer:

B. Neutron

Explanation:

Firstly, the nucleus is what contains the protons and electrons, so it is not an atomic particle. The electron has a negative charge, and the proton has a positive charge (you can remember this by looking at its prefix 'pro'). This means the neutron has no charge (think of it as neutral).

Answer:

Answer is -2.

Explanation:

I hope it's helpful!

Answer:

neg 2

Explanation:

Answer:

The ball will be travelling downward with a speed of 9.8 m/s.

Explanation:

The ball will be travelling downward with a speed of 9.8 m/s.

Explanation:

The acceleration of the ball will be a constant  

9.8 m s 2

(downward), regardless of whether the ball is travelling upward or downward.

The equation that makes this calculation simplest is

v f = v i − g ( Δ t )  

where the negative sign has been used to account for the opposite directions of  v i  and  g . After 3 seconds, v f = 19.6 − ( 9.8 ) ( 3 ) = 19.6 − 29.4 = − 9.8 m s

The negative result tells us that the ball is on its way downward by this time (consistent with our choice of a negative value for the downward acceleration of gravity).

Answer:

In space

Explanation:

I took the quiz

Answer:

in space

Explanation:

Answer:

because he is trying to break past you and sack your quarterback

Explanation:

The direction of the force can be determined by using the right-hand rule, where the thumb represents the direction of motion, the fingers represent the direction of the magnetic field, and the palm represents the direction of the force.

Since the direction of the induced current is opposite to the current in the wire, the net magnetic force on the frame is attractive, pulling the frame towards the wire.

Based on your question, when a metal frame is moving near a current-carrying wire, the direction of the induced current in the frame and the net magnetic force on the frame can be determined using the right-hand rule.
If the current in the wire flows upward, point your right thumb in that direction. Then, curl your fingers in the direction of the metal frame's movement. Your palm faces the direction of the induced magnetic field.
The induced current in the frame will flow in a direction that opposes the change in the magnetic field, as per Lenz's Law. To find the direction of the induced current, use the right-hand rule again with your thumb pointing in the direction of the induced magnetic field. Your fingers will curl in the direction of the induced current.
The net magnetic force on the frame depends on the direction of the induced current. If the frame moves towards the current-carrying wire, the induced current will create a magnetic force opposing the movement. If the frame moves away from the wire, the induced current will create a magnetic force attracting the frame. The exact direction of the net magnetic force depends on the specific configuration and the relative motion of the frame and wire.

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Answer:

675J

Explanation:

Given parameters:

Force  = 45N

Distance  = 15m

Unknown:

Work done by Sheila  = ?

Solution:

Work done by a body is the amount of force applied to make a body move through a distance;

         Work done  = Force x distance

 Now;

          Work done  = 45 x 15  = 675J

The length of nylon rope from which a mountain climber is suspended has a force constant of 1.15 ✕ 104 N/m.

Spring constant is the common name for the force constant. Hooke's law states that F=-kx. k=N/m is used to replace units in the equation where F is force, x is displacement, and k is force constant (spring constant) to determine the SI unit of force constant (spring constant).

The slope (gradient) of the graph equals the force constant. The proportionality constant, or k, is also known as the force constant in physics. A spring that is more rigid will have a higher value for k. The graph is no longer a straight line beyond point A since the gradient has changed and the formula F = Kx is no longer valid.

Maximum speed is at equilibrium where:

F = kx ⇒x =F/k

Now, F x=1/2mv²+1/2kx²

Solving we get,

V=F/√mk=Vmax

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Expressing the answer in three significant figures separated by a comma, we get: F⃗ _3 = (-7.99, -6.00) N = (-10.00 N, -38.88°) using newton second law.

To find the third force, we can use Newton's second law, which states that the net force on an object is equal to its mass times its acceleration:

F⃗ _net = m⃗ a⃗

where F⃗ _net is the vector sum of all the forces acting on the object.

We can start by finding the vector sum of F⃗ _1 and F⃗ _2:

F⃗ _1 + F⃗ _2 = (3.06 N)x^ + (-1.62 N)x^ + (1.73 N)y^

= (1.44 N)x^ + (1.73 N)y^

Now, we can find the net force by subtracting the vector sum of F⃗ _1 and F⃗ _2 from the mass times acceleration:

F⃗ _3 = m⃗ a⃗ - (F⃗ _1 + F⃗ _2 )

= (6.10 kg)(1.31 m/s^2 x^ - 0.673 m/s^2 y^) - (1.44 N)x^ - (1.73 N)y^

= (7.99 N)x^ - (6.00 N)y^

Therefore, the third force F⃗ _3 has a magnitude of 10.00 N and is directed at an angle of 38.88 degrees below the positive x-axis:

|F⃗ _3| = √[(7.99 N)^2 + (-6.00 N)^2] = 10.00 N

θ = tan⁻¹(-6.00 N / 7.99 N) = -38.88° (measured below the positive x-axis)

Expressing the answer in three significant figures separated by a comma, we get:

F⃗ _3 = (-7.99, -6.00) N = (-10.00 N, -38.88°)

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Answer:

im just 15 yearsold hehhez i dont know that either

The answer is in the picture.

A change in the magnetic field surrounding the conductor induces a voltage in the conductor, this induced voltage is known as Self-Inductance.

In order to cause a current to flow as a result of a shifting magnetic field, a process known as electromagnetic induction must be used.

A current will be induced in a coil of wire if the coil is placed in a magnetic field that is changing. Since there is an electric field causing the charges to be forced around the wire, current is flowing as a result. Since the charges are initially stationary, it cannot be the magnetic force.

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☆ Hello ☆

We first apply the data to the problem.

Data:

Then, we apply the formula that is.

Formula:

Finally we develop the problem.

Developing:

The distance traveled is 400 kilometers.

Uniform line movement

Rectilinear uniform motion is one in which an object moves in a straight line, it is a single direction, with a constant speed. When we speak of constant speed we mean that the movement maintains the same speed; that is, the object does not move faster or slower, always at the same speed.

We have that the data is:

Speed (V) = 80 km/h

Distance (d) = ?

Time (t) = 5 h

The formula for uniform motion is:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V=\frac{d}{t} } \end{gathered}$} }\)

We clear for the distance

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{d=v*t} \end{gathered}$} }\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{d=80\ \frac{km}{\not{h}}*5\not{h} } \end{gathered}$}}\)

\(\boxed{\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{d=400 \ km} \end{gathered}$}}}\)

We don't know, and we don't have enough information to calculate it.

The weight of the 60kg load is (m g) = 588 Newtons.

IF Hari wanted to lift the load 12m straight up, he would have to do

(Force x distance) = (588 N) x (12 m) =  7,056 Joules of work.

But to drag it, he has to provide enough force to balance out the force of friction, and we don't know how much that is. It depends on the weight of the load, the shape of the load, the smoothness of the part of the load that sits on the ground, and the smoothness of the ground.  But the only thing we know is the weight of the load.

Answer:

The penny will take 9.504 seconds to strike the ground if air resistance is neglected.

Explanation:

The penny experiments a free fall, which is uniform accelerated motion due to  Earth's gravity. This kind of motion neglects the effects of air resistence and the rotation of the planet. In this time we must calculate the time taken by the penny to hit the ground from top of the Empire State Building from the following equation of motion:

\(y = y_{o}+v_{o}\cdot t + \frac{1}{2}\cdot g\cdot t^{2}\) (Eq. 1)

Where:

\(y_{o}\) - Initial position of the penny, measured in meters.

\(y\) - Final position of the penny, measured in meters.

\(v_{o}\) - Initial velocity of the penny, measured in meters per second.

\(g\) - Gravitational acceleration, measured in meters per square second.

\(t\) - Time, measured in seconds.

If we know that \(y_{o} = 443\,m\), \(y = 0\,m\), \(v_{o} = 0\,\frac{m}{s}\) and \(g = -9.807\,\frac{m}{s^{2}}\), we obtain this quadratic function:

\(4.904\cdot t^{2} -443 = 0\)

All roots can be found easily by factorizing the polynomial:

\(4.904\cdot (t^{2} - 90.335) = 0\)

\(4.904\cdot (t-9.504)\cdot (t+9.504) = 0\)

The first binomial offer to us the only answer that is physically reasonable:

\(t = 9.504\,s\)

The penny will take 9.504 seconds to strike the ground if air resistance is neglected.

The observations that suggest the mass of the galaxy goes much farther out than its visible disc are Rotation Curves of Galaxies and Gravitational Lensing.

The speed of stars and gas in the disk of a galaxy, as a function of radius, is referred to as a rotation curve.

The velocity of stars and gas in the disk of a spiral galaxy is illustrated by a typical rotation curve.

As a function of distance from the galactic center, the curve charts the rotation speed.

This has suggested that a massive dark matter halo exists around spiral galaxies and that the mass of the galaxy goes much farther out than its visible disc.

Gravitational lensing is the bending of light by gravity.

Massive objects like galaxies and galaxy clusters bend light passing near them, causing distant sources to appear distorted and magnified.

Gravitational lensing can reveal the presence of dark matter in a galaxy since it is believed that dark matter outweighs luminous matter and can cause more bending of light than visible matter would alone.

This suggests that dark matter exists outside the visible galaxy disk, indicating that the mass of the galaxy extends much farther out than its visible disc.

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Answer:

It is transverse wave

Explanation:

Explanation:

yes, it's a transverse wave

hope it helps you

yeah definitely spring c

The box accelerates at 1. 0 m/s² to the right because the net force is 17N to the right . This statement clearly depicts the relation between force and acceleration. Hence option A is correct.

Acceleration is defined as the rate of change of the velocity of the body. Its unit is m/sec².It is a vector quantity. It requires both magnitudes as well as direction to define.

According to Newton's second law of motion, the net force acting on the body is equal to the product of mass and acceleration of the body.

The direction of acceleration is in the direction of net force acted.

Hence option A is correct.

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Answer:

B

Explanation:

In a solid, particles vibrate in place. For gas, particles can move freely. In a liquid, particles will flow over one and another.

Option 4.9 N is correct.

The weight (w) of the water displaced by the aluminum test object is 4.9 N.

How to calculate the weight of water displaced by an object? The weight of water displaced by an object can be calculated using Archimedes’ principle, which states that the weight of a liquid displaced by an object is equal to the buoyant force acting on the object. When an object is placed in a liquid, it experiences a buoyant force that is equal to the weight of the liquid displaced by the object.

Buoyant force = weight of displaced liquid Using the given options, we can calculate the weight of water displaced by the aluminum test object and match it with the answer. The mass of the aluminum object is 0.5 kg and its volume is 0.0001 m3. We know that the density of water is 1000 kg/m3 and the acceleration due to gravity is 9.8 m/s2.

Therefore, the weight of water displaced by the aluminum test object is given by: w = mg = ρVg = 1000 x 0.0001 x 9.8 = 0.98 N = 4.9 N (divided by 2 since only half the object is submerged)Therefore, the weight (w) of the water displaced by the aluminum test object is 4.9 N.

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The gravitational attraction between the two objects is approximately 3.799 × 10^-7 N. The gravitational force between two masses can be calculated using Newton's law of universal gravitation:

F = G * (m1 * m2) / r^2

where F is the gravitational force, G is the gravitational constant (6.6743 × 10^-11 N·m^2/kg^2), m1 and m2 are the masses of the two objects, and r is the distance between their centers.

Using the given values:

m1 = 120 Kg

m2 = 480 Kg

r = 17 m

Substituting these values into the formula:

F = (6.6743 × 10^-11 N·m^2/kg^2) * (120 Kg * 480 Kg) / (17 m)^2

F = 3.799 × 10^-7 N

Therefore, the gravitational attraction between the two objects is approximately 3.799 × 10^-7 N.

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During a maximal isometric contraction of the Biceps Brachii, motor units are recruited based on the size principle, starting with slow-twitch and progressing to fast-twitch motor units. Neural mechanisms involve descending signals and feedback from muscle spindles and Golgi tendon organs.

During a maximal isometric contraction of the Biceps Brachii, different types of motor units are recruited, each with distinct characteristics. Here are the types of motor units and their recruitment patterns:

1. Slow-twitch (Type I) Motor Units:

  - These motor units are characterized by low force production and high endurance.

  - They are recruited first during low-intensity contractions and are responsible for maintaining posture and performing low-force activities.

  - Slow-twitch motor units are activated by smaller, slower-conducting motor neurons.

2. Fast-twitch Fatigue-Resistant (Type IIa) Motor Units:

  - These motor units have moderate force production and fatigue resistance.

  - They are recruited after slow-twitch motor units and contribute to force development during moderate-intensity contractions.

  - Type IIa motor units are activated by motor neurons of intermediate size and conduction velocity.

3. Fast-twitch Fatigable (Type IIb/x) Motor Units:

  - These motor units produce high force but fatigue quickly.

  - They are recruited last during high-intensity contractions when maximum force is required.

  - Type IIb/x motor units are activated by larger, faster-conducting motor neurons.

The recruitment of motor units is governed by the size principle, which states that motor units are recruited in order of their size, from smallest (slow-twitch) to largest (fast-twitch) as force requirements increase. This recruitment pattern ensures a smooth increase in force output and helps distribute the load among different motor units to prevent fatigue.

Neural mechanisms involved in motor unit recruitment include the activation of motor neurons in the spinal cord by descending signals from the motor cortex and other motor centers. These signals trigger action potentials that propagate down the motor neurons, leading to the release of neurotransmitters at the neuromuscular junction, ultimately resulting in muscle fiber contraction. Feedback mechanisms, such as muscle spindles and Golgi tendon organs, also provide sensory information to modulate motor unit recruitment and maintain muscle function.

By sequentially activating motor units with increasing force capabilities, the nervous system can generate a maximal isometric contraction of the Biceps Brachii, allowing for tasks such as lifting heavy loads or exerting maximal force.

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Answer:

4 kg at 30 m/s

Explanation:

comparing in pair, the 3rd is more than the 1st, and the 4th is more than the 2nd, so it boils down to the lasts two. calculate, and im pretty sure you get 4 kg at 30 m/s...

Momentum of a ball of mass 2 kg moving at 30 m/s = 2 kg × 30 m/s = 60 kg m/s

Momentum of a ball of mass 3 kg moving at 20 m/s = 3 kg × 20 m/s = 60 kg m/s

Momentum of a ball of mass 4 kg moving at 30 m/s = 4 kg × 30 m/s = 120 kg m/s

Momentum of a ball of mass 5 kg moving at 20 m/s = 5 kg × 20 m/s = 100 kg m/s

So, highest momentum is of a ball of mass 4 kg moving at 30 m/s (120 kg m/s).

Answer: holding the ball in the air without moving it

Explanation:

When the ball goes up it’s potential energy

Throwing a ball high into the air is an example of kinetic energy being transformed into potential energy.

"Kinetic energy is a form of energy that an object or a particle has by reason of its motion. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy."

"Potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors."

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