In a parallel circuit that has the same number and type of resistors as a series circuit the total resistance will be __________ and the total current will be ________. A.greater;greater B.lower;greater C.greater;the same D.the same;lower

Answer:

ETotal=38505J

Explanation:

Known values:

m=150kg

h=20m

v=11m/s

KE=mv^2/2

PE=mgh

ETotal=PE+KE

KE=(150(11^2))/2

KE=9075

PE=150(9.81)(20)

PE=29430

ETotal=9075+29430

ETotal=38505J

The bicyclist is travelling at 0.0034 miles/hour

Thus, According to the given question, His bicycle's tire is 27 inches in diameter

∴ radius = 27/2 inches. His angular speed is 5π rad/sec.

1 complete rotation is 2π rad

∴ 5π rad/sec = 5π/2π = 2.5 complete rotations/sec

∴ It will be 2.5 times 60 complete rotations per minute. = 150 rpm.

Circumference of a circle is 2πr

= 2π(27/2) inches

= 84.82 inches which is equivalent to 0.00135 miles per rotation. The tire rotates at 150 rpm

∴The distance it will cover in miles per hour is = (0.00135×150)/60 miles/hour = 0.0034 miles/hour.

Thus, The bicyclist is travelling at 0.0034 miles/hour.

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Answer:

2m/s.

Explanation:

Speed = Distance / Time

= 4m / 2s

= 2m/s.

Physical equilibrium is a state of balance where there is no net force or torque acting on an object. This means that the object is either stationary or moving at a constant velocity. In order to achieve physical equilibrium, the forces and torques acting on an object must be balanced.

For example, if a book is placed on a table, it will remain in physical equilibrium as long as the force of gravity pulling it downwards is balanced by the normal force exerted by the table upwards.

Similarly, a person standing on one foot is in physical equilibrium when the force of gravity acting downwards is balanced by the force exerted by the ground upwards.

Physical equilibrium is a state of balance. In the context of your question, physical equilibrium refers to a situation where opposing forces or processes counteract each other, resulting in no net change. This balanced state occurs when the forward and reverse processes occur at equal rates, leading to constant properties such as temperature, pressure, and concentration.

In a chemical reaction, for example, physical equilibrium is achieved when the rate of the forward reaction equals the rate of the reverse reaction, maintaining a constant concentration of reactants and products. In physics, equilibrium can refer to mechanical equilibrium, where forces acting on an object cancel each other out, resulting in no net force or motion.

To summarize, physical equilibrium is a state of balance in which opposing forces or processes effectively neutralize each other, leading to stable and constant conditions.

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We are using raisins to observe osmosis.

Osmosis is the spontaneous net movement or diffusion of solvent molecules through a selectively-permeablity of the membrane from a region to the  high water potential energy to a region of lower water potential energy, in  the direction that tends to the  equalize the solutes the  concentrations on the 2 sides.

Each one of them gaining H2O and swells when placed in pure water due to the  endosmosis. When such as swollen raisins/apricots are the  placed in to the concentrated Solution, each  of them are  loses, water and the  consequently shrinks is  again (due to exosmosis).

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Answer:

Thank you!

Explanation:

Answer:

Explanation:

According to newtons second law, Force = mass* acceleration.

Given

Force = 1930 N

Mass of pumpkin = 2 kg

Required

Acceleration of the pumpkin

From the formula;

acceleration = Force/mass

acceleration = 1930/2

acceleration = 965m/s²

Hence  the acceleration of a 2kg pumpkin if launched by a force of 1930 N is 965m/s²

Dishwashers' efficiency to use energy more effectively can lead to decreased energy bills and a lessening of their negative effects on the environment.

Dishwasher energy efficiency is normally assessed using a standardized rating system that takes into account a number of variables, such as the quantity of water used, the energy needed to heat the water, and the amount of energy consumed by the dishwasher's engine and other parts.

More energy-efficient dishwashers are often made to use less electricity and water, which may save a lot of money over time.

Moreover, some energy-saving dishwashers could include extra features like dirt sensors and delayed start choices that can improve their efficiency while using less electricity.

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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:

if the acceleration is zero the displacements are equal in the same time interval, so we would see the points equally spaced in the diagram

if the acceleration is different from zero in these cases the intervals are different in the same time intervals

Explanation:

In a drawing of displacement as a function of time, we can know if in motion it is steely or not, the relationship that describes the motion is

            x = v₀ t + ½ a t²

we see that we have two cases:

* if the acceleration is zero the displacements are equal in the same time interval, so we would see the points equally spaced in the diagram

* if the acceleration is different from zero in these cases the intervals are different in the same time intervals. In the case of positive acceleration the points are spaced and in the chaos negative acceleration the points are getting closer to each other

The acceleration of the aircraft in SI units is 11.6 m/s². This is calculated using the kinematic equation that relates distance, acceleration, and final velocity, assuming an initial velocity of 0 m/s since the aircraft is starting from rest.

First, let's convert the take-off speed from miles per hour to meters per second, which are the units we will use for acceleration in SI units.

93.0 miles/hour = 41.47 meters/second (using the conversion factor 1 mile = 1.60934 kilometers and 1 hour = 3600 seconds)

Now we can use the kinematic equation that relates distance, acceleration, and final velocity, assuming an initial velocity of 0 m/s since the aircraft is starting from rest.

Final velocity squared = initial velocity squared + 2 x acceleration x distance

Plugging in the given values, we get:

(41.47 m/s)² = 0 + 2 x acceleration x 230 m

Simplifying and solving for acceleration, we get:

acceleration = (41.47 m/s)² / (2 x 230 m) = 11.6 m/s²

Therefore, the acceleration of the aircraft in SI units is 11.6 m/s².

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Answer:

D. rusting is answer....

Answer:

Explanation:

B

C. If an object exerts a force on a second object, the second exerts an equal force in the opposite direction.

Explanation:

I took the test lol

Puck 1 after collision with Puck 2 moves towards the west with a speed of 11 m/s, so Puck 2 will move towards the east with a speed of 16 m/s. Hence, option B is correct.

A collision, also known as an impact, occurs when two entities, such as two pool pieces, a country club, and a ball, a mallet and a nail, two rail cars when joined, or a tumbling object and a floor, suddenly and violently collide in close proximity to one another. The consequence of the impact is affected by the force, the length of time the items are in contact, the materials the two objects are made of, and other factors. According to conventional knowledge, a high-strength steel ball will rebound almost to the same spot from which it was dropped, in contrast to a mud or lead ball.

All of the kinetic energy of the colliding bodies is lost in a fully elastic impact, while the loss of kinetic energy is greatest in a perfectly plastic impact.

Therefore, the velocity of Puck 2 is 16 m/s towards the east direction.

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The least energetic photon that could be emitted during the process of an electron transitioning to the ground state has a wavelength of 1170 nm, while the most energetic photon has a wavelength of 911 nm.

To find the wavelengths of the least energetic and most energetic photons that could be emitted during the process of an electron transitioning to the ground state, we need to know the energy levels involved. For a hydrogen atom, the energy levels can be calculated using the formula:

Eₙ = -13.6/n² eV

where Eₙ is the energy of the nth energy level and n is an integer representing the principal quantum number.

The energy of a photon can be calculated using the formula:

E = hc/λ

where E is the energy of the photon, h is Planck's constant, c is the speed of light, and λ is the wavelength of the photon.

To transition to the ground state, the electron can make multiple jumps from higher energy levels to lower energy levels, emitting photons with each jump. The least energetic photon that can be emitted is from the transition of the first excited state (n=2) to the ground state (n=1), which has an energy of:

E = E₂ - E₁ = -3.4 eV

Using the formula above, the wavelength of the least energetic photon is:

λ = hc/E

= (6.626 x 10^-34 J s x 2.998 x 10^8 m/s) / (3.4 x 1.6 x 10^-19 J)

= 1.17 x 10^-7 m

= 1170 nm

The most energetic photon that can be emitted is from the transition of the highest energy level the electron occupies to the ground state. For a hydrogen atom, the highest energy level is infinity (n=∞), so we need to calculate the energy of an electron at infinity:

\(E_\infty\) = 0 eV

Thus, the energy of the most energetic photon that can be emitted is:

E = \(E_\infty\) - E₁ = 13.6 eV

Using the formula above, the wavelength of the most energetic photon is,

λ = hc/E

= (6.626 x 10^-34 J s x 2.998 x 10^8 m/s) / (13.6 x 1.6 x 10^-19 J)

= 9.11 x 10^-8 m

= 911 nm

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--The complete question is, What are the wavelengths of the least energetic and most energetic photons that could be emitted during the process of an electron transitioning to the ground state? Assuming that the electron begins in an excited state and emits one or more photons during each transition until it reaches the ground state.--

Answer:

If you see that a hot-air balloon is rising above the top of a hill, what is the top of the hill called?

A. delta point

B. distance system

C. coordinate system

D. reference point

hope it helps :)

The net torque on the pulley about the axle would be -0.20 Nm.

Torque is defined as a twisting or turning force that causes rotation around an axis, which can be a centre of mass or a fixed point. Torque can also be defined as a rotating object's ability to overcome turning resistance, such as a gear or a shaft.

In most cases, it is expressed in pounds per foot or newtons per metre. Torque is frequently confused with work, which is defined as force applied across a distance. Torsion (twisting) is, however, an essential component of the definition of torque.

Torque and work are both mechanical expressions of energy. Torque is a force that allows cars to smoke brake burns and accelerate quickly from a slow speed.

The net torque on the pulley well about axle is the torque due to the 30 N force plus the torque due to 20 N force:

T=(30 N)r₁ sinθ₁+(20 N)r₂ sinθ₂

= (30 N)(0.02 m)sin(-90°)+(20 N) (0.02 m)sin(90°)

=(-0.60Nm)+(0.40 Nm)

=-0.20 N m

Thus, The net torque on the pulley about the axle would be -0.20 Nm.

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The formula for horizontal distance is x = Vx * t, where t is the time. The formula for vertical distance from the ground is y = h + Vy * t - g * t2 / 2, where g is the acceleration of gravity.

What is the free fall equation?

Where g is the acceleration of gravity, vf is equal to g * t. On Earth, the value of g is 9.8 m/s/s. The velocity of the object after being dropped from rest for any given period of time can be calculated using the aforementioned equation.

How is height determined?

At the spot where the ruler, book, or other flat object meets your head, lightly mark the wall with a pencil. Measure the distance from the floor to the mark on the wall using a tape measure, preferably one made of metal that will stay straight.

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(a) The potential energy ( PE )  of the cart at the top of Nob hill is 147,000 J.

(b) The Kinetic Energy of the cart at the bottom of the hill is 147,000 J.

(c) The speed of the cart at the bottom of the hill is 31.3 m/s.

The potential energy ( PE )  of the cart at the top of Nob hill is calculated as follows;

P.E = mgh

where;

P.E = 300 kg x 9.8 m/s² x 50 m

P.E = 147,000 J

The Kinetic Energy of the cart at the bottom of the hill = The potential energy of the cart at the top of Nob hill based on law of conservation of energy.

The speed of the cart at the bottom of the hill is calculated as follows;

v = √ ( 2gh )

v = √ ( 2 x 9.8 x 50 )

v = 31.3 m/s

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Answer:

10

Explanation:

displacement would be 10 because knowledge

Answer:

La materia es la sustancia de la que está hecho todo material. En física, el sistema es una de las propiedades de la materia. Se puede transferir entre objetos y convertir en forma. No se puede crear ni destruir.

espero que te ayude!

Answer:

when we throw a ball on the wall so it will comes back in this there is third law of motion means every action has equal reaction

Given

d: diameter

d = 41 cm

We need radius information so we will calculate it:

r: radius

r = d/2

r = 41/2

r = 20.5 cm

Rotating speed

w = 242 rpm

Procedure

At a distance r from the center of the rotation, a point on the object has a linear speed equal to the angular speed multiplied by the distance r. The units of linear speed are meters per second, m/s.

But before using the formula we need to have all the units in the same system. So we need to go from rpm to rad/s and from cm to m

Now we can calculate the linear velocity of the belt.

Answer

The linear velocity of the belt would be 5.2 m/s.

All across the earth, the lengths of daytime and nighttime change throughout the year. These changes occur due to the tilt of the earth's axis. The axis is tilted by approximately 23.5 degrees in relation to the plane of its orbit. This causes the northern and southern hemispheres to receive different amounts of sunlight at different times of the year.

This phenomenon is known as the Earth's axial tilt. The changes in the length of daytime and nighttime are most extreme at the poles. The poles are the points on the earth's surface where the axis of rotation meets the surface. During the summer solstice in the northern hemisphere, the North Pole experiences 24 hours of daylight, while during the winter solstice, it experiences 24 hours of darkness.

The same phenomenon occurs at the South Pole, but at opposite times of the year. The reason for this is that the poles are tilted towards or away from the sun depending on the time of year. At the equator, the changes in the length of daytime and nighttime are less extreme, with almost equal amounts of daylight and darkness throughout the year.

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Answer:

Infrared

Explanation:

Infrared radiation is the form of light that is invisible to eye but can be felt as warmth.

Electromagnetic radiation has gamma rays, ultraviolet rays, x- rays , visible light and infrared radiation, etc.

The heated surface usually emits infrared radiations .They form a continuous spectrum.

Infra red radiation are used in different processes such as heat sensors, thermal imaging and night vision equipment.

Broadly they can be divided into three group near, middle and long infrared radiations.

These radiations can be seen with the eyes with special equipment or under certain conditions.

Answer:

∆p.e = mg∆h

Explanation:

Take height reference be h1 while height final be h2.

∆h = (h2 - h1)

m = m

g = g

•°• ∆p.e = mg(h2 - h1)

=> ∆p.e = mg∆h

It is important to clean the surface of cuvettes before performing an absorbance measurement to ensure accurate and reliable results.

Cleaning the cuvettes removes any contaminants or residues that could interfere with the measurement and lead to inaccuracies in the absorbance readings.

Spectroscopy is a branch of physics that focuses on the study of interactions between matter and electromagnetic radiation. It involves analyzing the properties of light, such as its intensity, wavelength, and frequency, to gain insights into the structure and behaviour of atoms, molecules, and materials.

In absorbance measurements, the cuvette acts as the sample holder through which light passes. Any impurities on the cuvette's surface can scatter or absorb light, affecting the intensity of the transmitted light. This interference can lead to incorrect measurements and impact the validity of the data.

By cleaning the cuvette surface, any substances that may be present, such as dust, fingerprints, or residual chemicals from previous experiments, are removed, minimizing the chances of interference. This allows for precise and consistent measurements of absorbance, enhancing the reliability of experimental data. Regular cleaning and maintenance of cuvettes are essential practices to ensure accurate and reproducible results in absorbance spectroscopy.

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Answer:

True

Explanation:

The energy carried by a wave is proportional to its amplitude squared. The larger the strength of the electric and magnetic fields, the more work they can do and the greater the energy the electromagnetic wave carries. A wave's energy is proportional to its amplitude squared (E2 or B2).

Answer:radiation, conduction, and convection

one or the other

Answer:

across:

5) infrared

6) convection

7) vacuum

8) conduction

9) insulator

down:

1) conductor

2) currents

3) radiation

4) insulation