A mass m attached to a spring vibrates without friction about its equilibrium (labeled II) as shown in the figure below. The end points of the vibration are labeled I and III, respectively. The acceleration is greatest at which positions? II and III II, only III, only I, only I and III

...... take off.....(complete)

Answer:

d 200 I'm 50 50 on it though

The statement which is false about the terrestrial planets is : "despite being the closest planet to the sun, some parts of mercury have a surface temperature far below the freezing point of water."

Mercury is the closest planet to the Sun, which means that it receives a large amount of solar radiation. However, the planet's lack of atmosphere and slow rotation result in extreme temperature variations between its day and night sides. During its daytime, temperatures can reach up to 430 °C (800 °F), which is hot enough to melt lead.

However, as Mercury rotates away from the sun and enters its nighttime, its surface cools rapidly. Due to the lack of an atmosphere to hold in heat, the planet's nighttime temperatures can drop to as low as -173 °C (-280 °F). These extreme temperature variations make it difficult for any potential life to survive on Mercury.

Despite these extreme temperature variations, some parts of Mercury do not get cold enough to freeze water. Water freezes at 0 °C (32 °F), and the lowest temperature ever recorded on Mercury was around -183 °C (-297 °F). Therefore, while some parts of Mercury can get very cold, it never gets cold enough to freeze water is the correct option.

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The electrode's function is to electrically activate the muscle. The muscles contract as a result of the impulses sent by the electrodes affixed to the skin.

E-stim uses gentle electrical pulses to activate sore muscles or tinker with nerves to lessen pain. E-stim may be suitable to everybody, but for many, this painless therapy is promoting healing and relieving unpleasant or painful symptoms.

An Action Potential that travels from the brain to the muscles causes a muscle contraction .Muscle contraction begins as a result of a signal from the nervous system.  A kind of neuron called a movement neuron conducts the information, an impulse known as an action potential.

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The car experiment involves the measurement of the distance traveled by the car down the ramp. The statement, "My car traveled 15 cm down the ramp" represents the results of the experiment. Thus, the answer is option c. Results.

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Answer:

results

Explanation:

Answer:

they can all be used on motor vehicles or transpostation

Explanation:

the solution is μk = 0.82.

Given that:μk = f_k /N = f_k w cos25° = f_k m g cos25°

μk can be solved using the formula above;

Substituting known values on the right-hand side of the equation,

μk = 45.0 N (62 kg) (9.80 m/s²) (0.906)

μk = 0.82

Therefore, the solution is μk = 0.82.

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Answer:

Magnetic Domain

Explanation:

Answer:

water has a low heat capacity

Explanation:

The tension in the support cable at low tide can be determined by analyzing the statics problem.

Tension is a force that acts along the length of a rope, string, or similar object when it is pulled tight. It is typically measured in newtons and is an important concept in the study of mechanics. Tension is the same regardless of the direction in which it is applied, making it a scalar quantity. It is also the opposite of compression, which is a force that acts to reduce the length of an object. Tension plays a major role in how objects interact with each other in the physical world.



To do this, we must consider a moment equation in order to determine the length of the buoy that is submerged. For this we can treat the buoy as a line (with negligible diameter, except for the evaluation of its volume and weight) and assume the support cable is vertically oriented.

Assuming the support cable has a negligible weight, the vertical component of the tension in the support cable can be found by setting up a static equilibrium equation in the vertical direction. This equation can be written as:

Fn = Wb + Ww

Where Fn is the tension in the support cable, Wb is the weight of the buoy, and Ww is the weight of the water displaced by the submerged portion of the buoy.

To determine Wb, we need to calculate the volume of the buoy, which can be calculated using the submerged length of the buoy. This can then be multiplied by the density of the buoy material to determine the weight of the buoy. To determine the weight of the water displaced by the submerged portion of the buoy, we need to calculate the volume of the submerged portion, which can be calculated using the submerged length of the buoy. This can then be multiplied by the density of water to determine the weight of the water displaced.

By setting up the static equilibrium equation and including the weights of the buoy and water displaced by the submerged portion of the buoy, we can calculate the tension in the support cable at low tide.

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Using the concept of Newton, the mass of the second block is 1 kg.

To find the mass of the second block, we can use the concept of Newton's second law of motion, which states that the net force acting on an object is equal to the product of its mass and acceleration:

F = m x a

Where:

F is the net force acting on the object,

m is the mass of the object,

a is the acceleration of the object.

Mass of the first block (m1) = 3.0 kg

Acceleration of the first block (a1) = 20 m/s²

Acceleration of the second block (a2) = 60 m/s²

Since both blocks experience the same net force, the force acting on the first block is equal to the force acting on the second block:

F1 = F2

m1 x a1 = m2 x a2

Substituting the given values:

(3.0 kg) x (20 m/s²) = m2 x (60 m/s²)

Simplifying the equation:

60 kg·m/s² = 60 m2 kg·m/s²

Dividing both sides of the equation by 60 m/s²:

1 kg = m2

Therefore, the mass of the second block is 1 kg.

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Answer: No, they cannot

Explanation:

Because every individual has different emotions, different beliefs.

Cloud spins faster due to conservation of angular momentum and not due to the conversion of gravitational potential energy is to kinetic energy.

Conservation of angular momentum states that the total angular momentum of a closed system remains constant over time, so as the cloud spins faster, the angular momentum must remain the same, meaning that the angular velocity must increase. On the other hand, gravitational potential energy is converted to kinetic energy. Gravitational potential energy is energy stored in an object due to its position in a gravitational field, and this energy is converted to kinetic energy as the object moves.

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Explanation:

The theory of speciation confirms what happens with fireflies, only fireflies that are part of the same species can reproduce among themselves, which means that fireflies that use pheromones as mating signals will attract fireflies that use that same form or mechanism of reproduction.

Some mechanisms that allow this type of differentiation or speciation to occur are: seasonal or geographic isolation and sexual isolation due to behavior or conduct.

Speciation allows the formation of new populations of organisms that share the same physiological and genetic characteristics. Therefore, the adult fireflies that shine as a mating signal are possibly found in the same geographical position and their physiological and genetic characteristics are compatible with those of his own species.

Answer:

Explanation:

The equation for the electric field is

\(E=\frac{kQ}{r^2}\) so filling in:

\(E=\frac{9.00*10^9(.0025)}{(.0055)^2}\) which in the end gives you

E = 7.4 × 10¹¹, choice A

Answer: Wave speed= frequency x wavelength

=20 x 3

=60 m/s

Explanation:

When the velocity of a particle moving along an axis is known, the instantaneous acceleration equal to zero is given as 0.6t.

We estimate the average speed between two places in time separated by t while allowing t to decrease. The outcome is the velocity function's derivative, v. (t).

The slope of the tangent line to the graph at any given location on the graph corresponds to the instantaneous acceleration there. The instantaneous acceleration of the particle is equal to 0 when this line is horizontal and has a slope of 0. According to the plot, these times correlate to the velocity function's extrema, which can be found at t = 1.75, 2.75, 3.25, and for all t = 4.

t = 0.6 is the most likely choice.

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Answer:

4:A battery with 15 loops or wire around the nail

Explanation:

More loops equals more force

A battery with \(15\) loops or wire around the nail have the stronger force.

So, option 4 is correct.

An electromagnet is a system that contains of a magnetic encircled by a coil that conducts an electric current to ionize the core.

Wherever controllable magnetism are required, such as in devices where the magnetic flux must be adjusted, reversed, or turned on and off, an electromagnet is utilized.

A battery with \(15\) loops or wire around the nail have the stronger force.

So, option 4 is correct.

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Explanation:

1 For a sound wave, the pitch is determined by which wave characteristic?

A - Frequency

2 Which of the following waves cannot be transmitted through a vacuum?

C - Sound waves

3 Which of the following could be the value of a wavelength that is found in the visible region of the electromagnetic spectrum?

B - 5 × 10^-7 m

4 Sophie is trying to measure the speed of sound. She stands 24.0 m away from a wall and claps repeatedly, changing the frequency until the echo synchronized with her claps. If she calculates the speed of sound as 325 m • s-1 how long did she wait between claps?

The time between her claps and the echo is twice the time it takes for the sound to travel from her to the wall. Therefore, the time between her claps is:

time = distance/speed = 2 x 24.0 m/325 m/s = 0.148 seconds (to three significant figures).

So the answer is 0.148, without units and correct to three significant figures

The cyclist can climb the same hill at a speed of 16.6 km/h using the same power.

To solve this problem, we need to use the concept of conservation of energy. When coasting down the hill at a steady speed of 12 km/h, the potential energy of the cyclist and the bicycle is converted to kinetic energy. At this speed, the force of friction is equal to the force of gravity, so the net force on the cyclist is zero. When pumping hard and descending the hill at a speed of 32 km/h, the cyclist is using more power to overcome the force of friction and increase the net force in the downhill direction.

To find the speed at which the cyclist can climb the same hill, we need to determine the power output of the cyclist and the force of friction when going uphill. Let's start by finding the force of friction. We know that Ffr=bv^2, where b is a constant. At 12 km/h, the force of friction is equal to the force of gravity, so we can set them equal to each other:

Fg = Ffr
mg sin(theta) = bv²

where m is the mass of the cyclist and the bicycle, g is the acceleration due to gravity, theta is the angle of the hill (4.0 degrees), and v is the speed of the cyclist. Solving for v, we get:

v = √((mg sin(theta))/b)

Plugging in the values, we get:

v = √((75 kg x 9.81 m/s² x sin(4.0))/b) = 4.60 m/s

Converting to km/h, we get:

v = 16.6 km/h

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The field of science related to Gregor Mendel is genetics since he discovered fundamental laws in this discipline.

Gregor Mendel was a Hungarian botanist the experimented with pea plants and observed how traits are inherited across generations, which led him to develop a series of genetic rules that can be used in virtually all organisms such as the principle of independent segregation or the principle of dominance in dominant traits.

Therefore, with this data, we can see that Gregor Mendel developed important experiments in genetics and discovered the basis of this field.

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The total vapor pressure of the solution is (c) 99.3 mmHg.

A substance's or an object's temperature is a measurement of how hot or cold it is. It is a characteristic of matter that has to do with the typical kinetic energy of the atoms or molecules that make up the thing or material. Normally, temperatures are expressed in either degrees Celsius (°C) or degrees Fahrenheit (°F).

Raoult's law, because substance A's mole fraction is 0.35, it follows that substance B's mole fraction must be 0.65. (since the two mole fractions must add up to 1). The partial pressures of A and B in the solution can be determined using Raoult's law:

A's partial pressure is calculated as 0.35 x 87 mmHg, or 30.45 mmHg.

B's partial pressure is equal to 79.3 mmHg (0.65 x 122 mmHg).

The partial pressures of A and B are added to determine the solution's overall vapor pressure:

Total vapor pressure equals partial pressures of A and B, or 30.45 mmHg, 79.3 mmHg, and 109.75 mmHg respectively.

Rounding to the nearest tenth, we obtain 109.8 mmHg, which is the value that is most similar to option (c) 99.3 mmHg. Hence, the correct response is (c) 99.3 mmHg.

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Answer:

have two or more paths

Explanation:

A parallel circuit is one that has two or more paths for the electricity to flow, the loads are parallel to each other.

Current it draws when it is connected to a 120-V Voltage Source is calculated as 10A.

Electric power (P) of any appliance is defined as the product of the voltage applied on it (V) and the current that flows in it (I).

The rate at which work is done or energy is transferred in an electrical circuit is called electric power or we can also say that it is a measure of how much energy is used in a span of time.

Therefore, P=I*V.

We need to calculate the current and we have the power and the voltage.

Given a heater rated at 1200 W and connected to  120 V voltage source will draw a current of 1200 W / 120 V = 10 A.

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Answer:

Explanation:

The moon is held in its orbit around Earth by gravity. The moon also feels a gravitational pull from the sun. Which of the following is true?

According to Newton's third law, the interaction forces are the same.

(a) The force of the moon acting on the sun is equal to the force of the sun acting on the moon.

The statement which best describes Deena's error is: B. Include the area of the rectangle under the line to find displacement for constant acceleration.

A velocity vs. time graph can be defined as a type of graph that is used to graphically represent the rate of change of velocity of an object with respect to time.

Based on the information provided in the table shown (see attachment), the statement which best describes Deena's error is her not including of the area of the rectangle under the line, so as to enable her find displacement for constant acceleration.

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Complete Question:

Deena made a chart to summarize features of a velocity vs. time graph for objects with constant acceleration and objects with constant velocity.

Which best describes Deena's error?

A. The line for constant velocity is not horizontal; it is diagonal and slopes downward.

B. Include the area of the rectangle under the line to find displacement for constant acceleration.

C. Find acceleration by finding the area of the rectangle above the line.

D. Find velocity by calculating the slope of the line.

Answer:

when there is uniform velocity the acceleration of a body is zero

Answer:

B

Explanation:

because that's the answer