A student plans to investigate how different factors affect the rotation rate of a hand-made motor when connected to a battery. The student will test a different variable in each investigation: the voltage of the battery (V), the number of loops used in the wire coil, and the number of magnets used below the loops. The first table shows details and predictions for investigation 1. How should the student design investigation 3 to finish testing the factors that affect the rotation rate of a motor?

The maximum speed that the car can have without losing contact with the road at the top of the hill of radius 50m is 22.14 m/s.

We need to apply the concept of centripetal force, force of gravity that produces the weight and the balance of these two, in order to solve this problem.

The force of weight must be equal to the centripetal force so that the weight must be equal to centripetal force.

∑ F = 0

Fc - Fw = 0

Fc = Fw

mg = mv²/r

where, m is mass

v is velocity

r is radius

Making v as subject, we have, v = √(g * R)

v = √(g * R) = √( 9.8 * 50) = 22.14 m/s

Thus, the velocity of the car that it can have without losing contact with the road is 22.14 m/s.

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Answer: The greenhouse effect is caused by certain gases in the Earth's atmosphere trapping heat from the sun, which leads to climate change. Physics plays a role in understanding this phenomenon and developing solutions to mitigate its effects.

Explanation:

Since a rotating comet is an isolated system, all of its mechanical energy (motion + potential) and angular momentum are conserved (constant).

Angular momentum is the quantity rotation of a body which is the product of its moment.

The angular momentum is given by,

L = mvr

where v= velocity of comet ,

r= distance of comet from sun ,

m= mass of comet,  

At position 1, r is smaller therefore v (speed) increases to keep the angular momentum constant, similarly at position r be comes large do the  speed v decreases again to keep the angular  momentum to the constant , therefore at position 1 speed of the and it  is greater than at 2. As speed is larger at 1 , therefore kinetic energy ( K=1/2mv² ) will also be greater at the  position 1 compared of   position 2 .

Now mechanical energy is the  same at both positions of  due to energy conservation law .

As mechanical energy is equal =KE+GPE , since it is  kinetic energy is greater at the  position 1 therefore GPE will be greater at position 2 .

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Answer:

Larger than mercury, venus, earth, mars, uranus, neptune

smaller than jupiter

In clockwise direction the propellers rotate as seen from the rear of the plane. If the plane is flying horizontally and suddenly pulls upward, the nose of the plane would veer upward. The correct options are B and A respectively.

The propellers rotate anticlockwise when viewed from the back of the aircraft.

When observed from the rear, an anticlockwise rotation direction corresponds to propellers spinning in the forward direction because the angular momentum of the propellers points directly forward from the plane.

The nose of a plane tends to pull forward when a plane flying horizontally suddenly pulls upward. This is brought on by the direction of the lift force produced by the wings changing.

By raising the nose, the angle of attack widens, increasing the lift force that raises the plane's nose upward. The change in the aerodynamic forces exerted on the aircraft is what causes the nose to rise upward.

Thus, the correct options are B and A respectively.

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Your question seems incomplete, the probable complete question is:

The angular momentum of the propellers of a small airplane points directly forward from the plane. Part A In what direction do the propellers rotate as seen from the rear of the plane?

A. Clockwise

B. Counterclockwise

C. None of the above

Part B If the plane is flying horizontally and suddenly pulls upward, in which direction does the nose of the plane tend to move?

A. The nose of the plane would veer upward.

B. The nose of the plane would veer to the left.

C. The nose of the plane would veer downward.

D. The nose of the plane would veer to the right.

centers of two slots of width an are separated by this amount. If the initial minimum of the diffraction peak of light of wavelength is where the fourth minimum of the interferometer is located, then the ratio a/d is equal to 2/7.

A waveform signal's wavelength is defined as the separation between two similar points (adjacent crests) in adjacent cycles as the signal travels through space or along a wire. This length in wireless systems is typically expressed in metres (m), centimeters (cm), or millimeters (mm) (mm).

The wavelength is indeed the distance that separates two wave crests, while troughs have the same wavelength. The number of oscillations which pass over a specific place in a second is known as the frequency and is expressed in seconds of cycles (Hz) (Hertz).

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Thermogenesis has been studied the plants in the genus arum, including skunk cabbage and the corpse flower. In these plants, these hypotheses have been provided to explain the reason behind thermogenesis

Thermogenesis, which takes place in specialised tissues such brown adipose tissue and skeletal muscle, is described as the disposal of energy through the generation of heat.

All metabolic activities involved in keeping the organism in a live condition require mandatory thermogenesis, which takes place in all organs. It also includes the energy used when food is consumed, digested, and processed (thermic effect of food, or TEF).

Thus, the reason behind thermogenesis are:

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Answer:

so heating a magnet disrupts the domain walls and it becomes easy for the magnet to become ordinarily misaligned and rotate. so when that happens they are now less aligned and point in the opposite direction to the neighbors causing a decrease in the magnetic field and loss of magnetism

The most likely size of the particle is 10 mm

Point bars are formed as a result of silt deposition brought on by a decrease in water velocity inside the channel bend. Where there are low gradients and a mostly fine-grained load, meandering channels can emerge.

When a particle's velocity falls to the point that the water lacks the kinetic energy to carry it, sediment deposition occurs, causing the particle to fall out of suspension. Silt is a sediment that is bigger than clay but smaller than sand.

Given is a S curve

and in this graph we can see that when the speed of the water is 50 cm/sec in the x axis propotionatily the size of the particle is 10 mm in the y axis.

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Answer:

pls mark as brainliest

Explanation:

Velocity and speed is constant

Sara pushed a box of lab equipment along the ground, displacing it by 1 meter. she has done work on the box of lab equipment.

When a force is applied and an object is moved over a specified distance, a work has been completed. The following formula is used to calculate an object's work,

W = Fd

Where, F is the applied force, and d is the object's displacement.

Therefore ,Sara has therefore completed her work on the box of lab equipment when she moves it by 1 m.

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The vestibular sense organ that would be registered is Brain.

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The potential energy won't change. if the individual raises the object above their heads.

Depending on an object's height and mass, it will have a different amount of gravitational potential energy. The amount of gravitational potential energy an object possesses increases with weight and height above the ground. The relationship between weight, height, and gravitational potential energy.

In short, potential energy is the energy that an object has stored because of its position in relation to a zero position. If an object is located at a height that is higher (or lower) than the zero height, it has gravitational potential energy.

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The energy source of quasars or active galaxies is currently thought to be matter falling toward a massive black hole in the center of a galaxy, according to persuasive evidence discovered by astronomers.

The definition of energy is "capacity to do activity, which is ability to apply force causing motion of an object." Energy is simply the force that moves objects, despite this definition's seeming complexity. Both potential and kinetic energy fall under this category.

Due to the fact that it is a fundamental human requirement, energy is crucial to our daily existence. Our constructions, which are constructed by humans, are heated and cooled by energy. Even the simplest tasks like lifting your finger or getting out of bed require energy.

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95.60 watt much power is demonstrated by the lift.

Energy consumption per second is measured as power. The amount of force necessary to create a unit displacement is another way to quantify power. Power, a scalar quantity, is represented by the letter P. For instance, a light bulb with 100 W of electricity will provide more light than one with 10 W.

Given that,

weight (W) = 20 Kg

distance = 0.4 m

time (t) = 0.82 sec

As we know,

Power (P) = W/t

or, P = (20 kg × 9.8 × 0.4)/ 0.82

or, P = 95.60 watt

Thus, 95.60 watt much power is demonstrated by the lift.

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The change in the spring potential energy is calculated to be 0.05 Joules if the spring has a constant of 125 N/m.

The formula for the change in the spring potential energy can be given as;

String potential energy = distance of displacement × force

As the distance of displacement is 2 cm we convert it into meters as follows;

1 m = 100 cm

2 cm = 2 ÷ 100 m

2 cm = 0.02 m  

The force can be determined by using the following formula;

force = spring constant × displacement

force = 125 N/m × 0.02 m

force = 2.5 N

Now substituting the values of force and displacement in the equation for potential energy as follows;

String potential energy = 0.02 × 2.5

String potential energy = 0.05 Joules

Hence 0.05 Joules is determined to be the change in the spring potential energy.

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Answer:

Minus the components

Explanation:

= minus components and figratives = answer 2 4

According to conservation of energy, the energy of interacting bodies in a closed system remains constant. The total energy of an isolated system remains constant; it is said to be conserved over a period of time.

Elastic energy is the mechanical implicit energy stored in the configuration of a material or physical system as it's subjected to elastic distortion by work performed upon it. Elastic energy occurs when objects are impermanently compressed, stretched or generally misshaped in any manner.

The mechanical energy is never lost forever , rather it gets converted to thermal energy because of the friction .

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When one of the Charges Q is swapped out for another charge 4Q, there is a force on Q that is 4F strong.

Coulomb's equation of electricity states that the amount of the force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance separating the two charges.

Mathematically, F = KQ₁Q₂ /d²

The coulombs law equation gives the magnitude of the force between the items, F, if the initial charges on the two objects are each equal to Q and the distance between the charges is d. i.e. F = KQQ/d².

The force between the charges will now be given as follows if one of the charges is swapped out for a charge 4Q:

F` = KQ₄Q / d²

F` = 4 × KQQ / d²

F' = 4F.

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Question:

Two small objects each with a net charge of Q (positive) exert a force of magnitude F on each other. We replace one of the objects with another whose net charge is 4Q. The original magnitude of the force on the Q charge was F; what is the magnitude of the force on the Q now?

A. 16F

B. 4F

C. F

D. F/4

The acceleration of the racquetball during the collision is found to be 1330m/s².

According to the second law of motion proposed by Newton the force on the body is equal to the change in momentum per unit time of the body.

So, we can write,

Ma = M∆V/t

Where,

M is the mass of the body is the,

a acceleration of the body,

∆V is the change in speed of the body after the collision,

t is the time taken during the collision.

It is given to us that the racquetball strikes the wall with a speed of 30m/s and it rebounds with the speed of 26 m/s the collision time is 20 milli seconds.

Putting the values,

a = 30-(-26)/0.02

a = 1330m/s².

So, the acceleration of the racquetball is 1330m/s².

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Answer:

Momentum is a physical quantity equal to the product of mass of the object and its velocity. Since velocity is a vector (a quantity that has both magnitude and direction), momentum is a vector quantity as well. According to the law of conservation of momentum, the momentum is always conserved.  This means that the initial momentum must be equal to the final momentum. Our initial momentum is zero since both, trolly and the girl on it are stationary. When the girl jumps, she has some velocity v. To compensate for that, the trolly will also move with some velocity v, but in the opposite direction so that the momentum stays conserved.

Explanation:

The velocity with which the block is travelling on the frictionless surface is 2.5 m/s.

The acceleration of the block is calculated by applying Newton's second law of motion as follows.

μ = F / N

where;

μ = F / N

μ = ma / mg

μ = a / g

a = μg

a = 0.19 x 9.8 m/s²

a = 1.86 m/s²

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

t = √ ( 2h / g )

t = √ (2 x 8.6 / 9.8)

t = 1.33 s

The velocity with which the block is travelling on the frictionless surface is calculated as;

v = u + at

where;

v = 0 + (1.86)(1.33)

v = 2.5 m/s

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The relative velocity of the motorcycle, from the point of view of the passenger in the car, is of:

20 miles per hour.

The relative velocity between two objects is divided into two cases, as follows:

Then, for each case, the relative velocity is obtained as follows:

The velocities in this problem are given as follows:

The point of reference is the car, and they are travelling in the same direction, hence the relative velocity is obtained as follows:

80 - 60 = 20 miles per hour.

Which means that each hour, the motorcycle will get 20 miles farther than the car.

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Water in liquid form has an entropy change of 63.4 J/K.

define entropy ?

A state of disorder, randomness, or uncertainty is most frequently associated with the scientific concept of entropy, which is also a quantifiable physical property. From classical thermodynamics, where it was first recognized, to the microscopic description of nature in statistical physics, to the fundamentals of information theory, the term and concept are used in a variety of disciplines. It has wide-ranging uses in physics and chemistry, biological systems and how they relate to life, cosmology, economics, sociology, weather science, and information systems, including the transmission of information through telecommunication.

We use the equation to determine the entropy change for the same phase at various temperatures:

ΔS=n x Cp x In(T₂/T₁)

ΔS=3 x 75.38 x In (368/27)

ΔS= 63.4 J/k

therefore the entropy change of the water is  63.4J/k

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As it climbs yet another hill, the roller coaster slows down. Kinetic energy is converted into potential energy.

The gravitational potential energy (PE = mgh) of an object is the energy it has as a result of its height and is equal to the mass of the object times its height times the gravitational constant. The gravitational potential energy on a roller coaster is highest at the peak and lowest at the bottom. The roller coaster's potential energy is converted into kinetic energy as it travels down the hill at high speed. As it climbs yet another hill, the roller coaster slows down. Kinetic energy is converted to potential energy.

Potential energy is transformed into kinetic energy, which the roller coaster uses to go forward. Once it has around the first hill, it has all the kinetic energy it needs to complete the journey. Different wheel designs make for a comfortable ride once you're moving. Running wheels on the coaster guide it along the track.

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Landslides are caused by earthy elements moving from higher to lower areas as a result of gravity. The sliding down of a slope of a volume of rock, rubble, or earth is known as a landslide.

All things with mass, including our Earth, really bend and curve spacetime, which is what causes gravity to pull you toward the ground. What you experience as gravity is that curvature.

A mass attracts a mass; the amount of the gravitational force is direct proportion to the masses of both the two items and inverse to the square of both the distance between two pieces. Gravitational force is an electrostatic attraction and exists among the objects with mass.

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It will cost 0.324 Dollars to light six 100w light bulbs for six hours if the price of electrical energy is $0.09/ kwh.

kwh is commercial unit of electric energy. 1 unit= 1 kwh.

When 100 w power device is run for 1 hour, the amount of electrical energy consumed is 1 kwh.

We will find total units of electrical energy consumed in the given question.

energy consumed by 6 bulbs = 6×100= 600 w( joules per second).

The value in kwh is = 600÷1000

                                = 0.6kwh

Total energy consumed in 6 hours is = 0.6×6 = 3.6 kwh

So, the cost is = 3.6×0.09 = 0.324 dollars.

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