A mixture contains _____ or more different substances. a mixture is not a pure substance, and its components can be separated by _____ means.

The kinetic energy of the man after jumping off the bridge at 20 m down having free fall would be 10000 joules.

Kinetic energy is part of mechanical energy that is presented by a body in motion therefore kinetic energy is the virtue due to velocity of an object.

Newton gave three laws of motion which can be utilized to find the velocity, acceleration and displacement of a body. These laws are only applicable for constant acceleration.

Given:

Mass of the man = 50 kg

Length of the bungee rope = 20 meter

Acceleration due to gravity = 9.8u

According to the question we have to find the kinetic energy of the man at 20 m of height.

This kinetic energy will be because of the velocity of the man and will be converted by gravitational potential energy.

First we need to find the speed of the man at 20 meter.

\(v = \sqrt{2 \times 9.8 \times 20}\)

v = 20 m/s

Kinetic energy = 0.5 × m × v × v

Where,

M is the mass of the man

v is the velocity of the man jumping the bridge

Substituting value in the formula for kinetic energy we get,

Kinetic energy of the man = 0.5 × 50 × 400

Kinetic energy of the man = 10000 joules

Therefore, the kinetic energy of the man after jumping off the bridge at 20 m down having free fall would be 10000 joules.

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A truck enters a highway driving 60 mph A car enters the highway at the same place 0 nutes later and dives 72 mph in t The car will pass the truck in (Round to the nearest minute) minutes same direction From So the car enters the highway,However, this contradicts the information given that the car enters the highway 0 minutes later than the truck.

To determine how long it will take the car to pass the truck, we can set up an equation based on their relative speeds and distances traveled.

Let's assume that the car passes the truck after time 't' minutes.

In 't' minutes, the truck will have traveled a distance of 60 × (t/60) = t miles.

The car enters the highway 0 minutes later and travels at a speed of 72 mph. Therefore, when the car passes the truck, it will have traveled a distance of 72 × (t/60) = 1.2t miles.

To find when the car passes the truck, we can set up the following equation:

t = 1.2t

Simplifying the equation, we get:

t - 1.2t = 0.2t

0.2t = 0

This equation does not yield a valid solution since it implies that the time required for the car to pass the truck is 0 minutes. However, this contradicts the information given that the car enters the highway 0 minutes later than the truck.

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On the other hand, J.J. Thomson's work with cathode rays showed that they were composed of negatively charged particles which he called "corpuscles", now known as electrons.

Beryllium is a chemical element with the symbol Be and atomic number 4. It is a light, strong, silvery-white metal that is often found in nature as a free element in minerals. Beryllium is known for its high thermal and electrical conductivity and its strength-to-weight ratio. It is commonly used in aerospace, nuclear, and automotive industries. Beryllium is also used in the production of certain alloys and ceramics, and is used in x-ray machines and other medical equipment. Beryllium compounds can be toxic to humans, so proper handling and safety measures should be taken when working with it.

James Chadwick's work with alpha particles showed that beryllium, when bombarded with alpha particles, released energetic particles with no charge. He identified these particles as the neutron, a subatomic particle with no charge.

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Answer: Studies performed by the CPSC give reliability to the results of improved safety obtained by each soap company.

Explanation:

The function of Consumer Product Safety Commission is to make sure that the products which are used by consumers are safe and also make sure that companies meet the required and acceptable safety standards. The products that are seen to be harmful to the health of the consumers are banned.

Regarding the question above, CPSC would perform studies when other soap and detergent companies have already conducted research on the same products because the studies performed by the CPSC give reliability to the results of improved safety obtained by each soap company.

Answer:

Tests performed by the CPSC follow established scientific methods, but those performed by soap companies do not.

Explanation:

The magnetic flux through the circular cross-sectional area of the solenoid is 0.00066 Weber or (Tm²).

A wire tightly twisted in a lengthy, thin coil is a solenoid. Due to its design, the solenoid will have an electromagnet inside of it and a weak magnetic field surrounding it if we pass a current through it.

Equation of solenoid's magnetic field:

By utilizing the convolution operation as well as right hand rule, the magnetic field within a large solenoid is appropriately computed, but all of that can be condensed into:

B = (µ₀ × N × I )/ L

where

B = magnetic field (Tesla)

µ₀ = \(\pi\)× 10^-7 (Tm/A ) is the vacuum permeability,

N = number of turns on solenoid,

I = electric current (Ampere)

L = length of the solenoid (m)

According to the question;

A diameter of solenoid 6.00 cm.

A radius of solenoid is 3 cm = 0.03m

Number of turns = 750

The length of solenoid is 10cm = 0.1m

Substitute all the values in equation to fine mangetic filed.

B = (\(\pi\)×\(10^{-7}\) × 750× 15 )/ 0.1

B = 0.035 Tesla

The formula for magnetic flux is

Ф = B×A

   = B×(\(\pi\)\(r^{2}\))

   = 0.035×\(\pi\)×\(.03^{2}\)

Ф = 0.000099

Ф = 99×\(10^{-6}\) Weber

Therefore, the magnetic flux through the circular cross-sectional area of the solenoid. is 99×\(10^{-6}\) Weber.

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The thing that happens when you push or pull a water tube is that the force makes the tube to speed up, slow down, or be in one place.

It is very hard when pulling  water and if a person need to consistently pull air out of the tube before water makes it to the pump, it is very  difficult and some pumps may or cannot do it.

In regards to pushing, when a person is pushing above the Center of Gravity, one is pushing the said object into the ground and thus is increasing the rate of friction.

If a person is pulling you are said to be pulling above the Center of Gravity and lowering friction.

So, The thing that happens when you push or pull a water tube is that the force makes the tube to speed up, slow down, or be in one place.

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The final position of the car with an initial position of x = 83.2 m which undergoes a displacement of - 153 m is

We know that,

s = \(x_{2}\) - \(x_{1}\)

where,

s = Displacement

\(x_{2}\) = Final position

\(x_{1}\) = Initial position

Given that,

\(x_{1}\) = 83.2 m

s = - 153 m

\(x_{2}\) = -153 + 83.2

\(x_{2}\) = - 69.8 m

Displacement is the the distance between initial and final positions of the object. It is denoted by s.

Therefore, the final position of the car is - 69.8 m

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It is more difficult to start moving a heavy carton from rest than it is to keep pushing it with constant velocity because of static friction.

Static friction refers to the resistance encountered when attempting to initiate the movement of two objects that are in contact with each other but not currently in motion relative to each other. When an object is at rest, the force of static friction acts in the opposite direction to any force applied to it.

In this case, the force applied to the carton is the force needed to start moving it from rest. The force of static friction is greater than the force applied to the carton, making it difficult to start moving the carton from rest.

Once the carton is moving with constant velocity, the force of static friction is no longer acting on it. The only force acting on the carton is the force that is applied to keep it moving at a constant velocity. This force is equal to the force of kinetic friction which is less than the force of static friction.

To summarize, the initial effort required to overcome the static friction between a heavy carton and its resting position is greater compared to the continuous force needed to maintain its constant velocity. The force of static friction is greater than the force applied to the carton, making it difficult to start moving the carton from rest.

Once the carton is moving with constant velocity, the force of static friction is no longer acting on it, and the only force acting on the carton is the force that is applied to keep it moving at a constant velocity.

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Answer:

Technician A is correct

Explanation:

The statement "charging system is needed to keep the battery fully charged and recharge the battery after starting" is correct

from technician's B point of view, that the charging system supplies electrical current needs after engine start is incorrect.

In-fact the charging system is dedicated to the battery alone, the electrical needs of the system is gotten from the battery.

Answer:

True Edg2020

Explanation:

Answer: true

Explanation:

because I say so :P

Answer:

Often the independent variable is plotted on the x-axis - and example might be time (an experiment where time is measured by a watch or an independent mechanical device)

The dependent variable is often plotted on the y-axis - and example here might be the velocity or the acceleration,

It may be the responsibility of the experimenter to determine the value of the dependent variable by some type of measurement

Two light bulbs are parallel-connected in a circuit. If two more light bulbs were put in parallel to the initial ones, Each bulb's brightness would get dimmer as the circuit's overall resistance got lower. Because the circuit's overall resistance would rise, each bulb's brightness would also rise. Even if the circuit's overall resistance would decrease, each bulb's brightness would not change. Even if the circuit's overall resistance would rise, the intensity of each bulb would stay the same.

A resistor is a passive two-terminal electrical component used in circuits to implement electrical resistance. Resistors have a variety of purposes in electronic circuits, including lowering current flow, adjusting signal levels, dividing voltages, biassing active components, and terminating transmission lines.

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the con- stant angular acceleration (in rad/s2) of the centrifuge is α = -226.2rad/s².

Calculation :

We know that ,

                      W² = W₀ + 2αΔФ  ,  W = 0  so

                      α = -W₀²/2ΔФ  =  -\((\frac{2\pi *3600}{60} )^{2} *\frac{1}{2*2\pi *50.0}\)

                         = -72.0π

                      α = -226.2rad/s²

Angular acceleration refers to the rate of change of angular velocity over time. Since there are two types of angular velocity, spin angular velocity and orbital angular velocity, there are of course two types of angular acceleration, spin angular acceleration and orbital angular acceleration. Spin angular acceleration refers to the angular acceleration around the center of rotation of a rigid body, while orbital angular acceleration refers to the angular acceleration of a point particle about a fixed origin.

Angular acceleration is measured in angular units per unit time squared (radians per second squared in SI units) and is usually represented by the symbol alpha (α).

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At a washing station at sea level, the water is pushed 408 meters uphill and flows out of a faucet at 45 meters per second.

According to the needs of the application, the discharge water is pressured. The water is pressurized to 3000psi to 5000psi for cleaning applications. They are extremely highly pressurized in the pressure ranges of 30000psi to 50000psi for cutting purposes. Water that must be pushed in a specific length of time is called a flow rate.

Wastewater or sewage is gathered at a pump station and kept there in a chamber. When the level of collected sewage reaches its maximum, a high-pressure integrated pump is used to lift the sewage through a discharge system. 

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Answer:

Breaking bones, injuring tendons, bruising

Explanation:

Lifting hands and the down by one student at a time best describe the presentation of the transverse wave by students. Option D is correct.

Therefore, lifting hands and the down by one student at a time best describe the presentation of the transverse wave by students.

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Answer:

The correct option here is D.

~Hope this helps! :)

Answer:

t = 6

Explanation:

Displacement is equal to the area under a velocity vs time graph.

In this case, the area is a triangle.  At time t, the base of the triangle is t.  The height of the triangle can be found with similar triangles:

h / t = 8 / 12

h = ⅔ t

So the distance traveled at time t is:

d = ½ (t) (⅔ t)

d = ⅓ t²

The distance traveled at time 12 is:

D = ½ (12) (8)

D = 48

We want to find when d = D/4.

d = D/4

⅓ t² = 48/4

⅓ t² = 12

t² = 36

t = 6

Alternatively, since the acceleration is constant here, we could use a constant acceleration equation.

Δx = v₀ t + ½ at²

Given v₀ = 0 m/s and a = ⅔ m/s²:

Δx = (0) t + ½ (⅔) t²

Δx = ⅓ t²

When t = 12, Δx = 48.

⅓ t² = 48/4

t = 6

Answer:

2 m long, how wide is it? SOLUTION. Given: F = 60.0 N. W = 2.05 × 105. J x = 9.60 × 102 m. Unknown: d = ? ... moved? 3. A hummingbird has a mass of about 1.7 g. Suppose a hummingbird does 0.15 J of work against gravity, so that it ascends straight up with a net acceleration of 1.2 m/s. 2 . How far up does it move? 4.

Explanation: hope this helps plz help me with my question

Passive solar heating utilizes design and natural processes to capture and distribute solar energy without mechanical devices, while active solar heating uses mechanical systems to collect and distribute solar heat, requiring external energy inputs.

Passive solar heating and active solar heating are two different approaches to utilizing solar energy for heating purposes. Here's a brief explanation of each:

1. Passive Solar Heating:

Passive solar heating refers to the design and use of building materials to capture, store, and distribute solar energy without the use of mechanical or electrical devices. It relies on natural processes and elements to maximize solar gain and heat transfer. Some common passive solar heating techniques include:

Passive solar heating systems do not require active mechanical components like pumps or fans and are generally considered more energy-efficient and cost-effective.

2. Active Solar Heating:

Active solar heating involves the use of mechanical and electrical devices to collect, store, and distribute solar energy for heating purposes. It typically utilizes solar collectors, such as solar panels or solar thermal systems, to capture sunlight and convert it into heat energy. The collected heat is then transferred to a heat storage system or directly used to provide space heating or water heating. Active solar heating systems may involve pumps, fans, and controls to circulate the heated fluid or air throughout the building.

Active solar heating systems require external energy inputs, such as electricity for powering pumps or fans, and often involve more complex installation and maintenance compared to passive solar heating. However, they can offer greater control and efficiency in heating applications, especially in larger or more demanding spaces.

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Answer:

Explanation:

4.  Density of water = 1.01g/ml

6:  Mass of silver = 892.5g

8:  Mass of 157.8g  I gave the answer as mass, even though it asked for weight.

Answer:

.763

Explanation:

60 mi/hr = 26.82 m/s

Average velocity = 26.82/2 = 13.41 m/s

d = vt

48 = 13.41 t

t = 3.58 s

a = change in velocity/change in time

  = 26.82 / 3.58 = 7.49 m/s^2

Ff = ma           uf =  Ff/ Fn = Ff/ mg

  ma / mg   = uf

      a/g = uf

       7.49 / 9.81 = coefficient of friction = .763

Answer:

The temperature at which a liquid boils and turns to vapor.

Explanation:

Boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapour of the liquid; under this condition, addition of heat results in the transformation of the liquid into its vapour without raising the temperature. therefore the water is at its boiling point.

Answer:

When a substance starts to boil, like 212° F, that is considered boiling point.

The electrical component that is used for detecting light levels in digital cameras is the light meter.

A light meter is a device used to measure the amount of light. In photography industry, a light meter is used to determine the proper exposure for a photograph.

A digital camera is a camera that captures photographs in digital memory.

Most digital cameras can be grouped into four main types which includes:

Each type of these digital cameras has advantages and disadvantages, and some the types are more expensive than their counterparts.

There are two different kinds of light meters which are:

-An incident light meter measures all the light falling onto a subject. Incident light meters help a camera focus on a subject regardless of how light or dark the surrounding background is.

- Reflective light meters  on the other hand do the opposite by measuring the light reflected by or bouncing off a subject.

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The rpm required by most turbine generators to begin producing electricity is generally calculated to be 1000 rpm to 1500 rpm.

The rpm required by most turbine generators to begin producing electricity depends on the specific design and size of the generator. Generally, the starting speed of a turbine generator is around 1,000 rpm, but it can vary greatly depending on the type of turbine and generator used. For example, large-scale steam turbines can require a starting speed of around 3,000 rpm, while smaller gas turbines may only require a starting speed of around 500-600 rpm.

The starting speed is also influenced by the load on the generator and the amount of energy required. As the load increases, the generator may need to spin faster to produce more electricity. Conversely, if the load decreases, the generator may slow down to conserve energy.

Ultimately, the specific rpm required for a turbine generator to start producing electricity is determined by the manufacturer's specifications and the intended use of the generator.

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The shirt looks red because it absorbs the other colors and reflects only the red waves.

Red objects reflect red light and green objects reflect green light. But what about the rest of the colors that hit that object. If you have a red object, all orange, yellow, green, blue, and violet light will be absorbed by that object. A red object is red when hit by white light because it absorbs all components of white light except for the scattered red portion. Colored objects look that way because of the reflected light. When sunlight hits a green leaf, it absorbs violet, red, and orange wavelengths. Reflected wavelengths appear green. In both cases, we see the complementary color of the absorbed color.

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Answer:

the size of a typical campus

Explanation:

The eight planets of the solar system cover the size of a typical campus option (B) is correct.

It is defined as the energy that continuously comes from the sun. As we know, the sun is the greatest source of energy. The sun's radiation reaches the earth and can be utilized as heat energy.

It is given that:

Suppose we imagine the sun to be about the size of a grapefruit.

As we know,

Sun is the greatest source of the energy.

Our solar system is around 160 million times smaller than the Milky Way galaxy, notwithstanding how big this figure may seem.

Thus, the eight planets of the solar system cover the size of a typical campus option (B) is correct.

The question is incomplete.

The complete question is:

Suppose we imagine the Sun to be about the size of a grapefruit. How big an area would the orbits of the eight planets of the solar system cover?

A) the size of a typical dorm room

B) the size of a typical campus building

C) the size of a typical campus

D) the size of a small city

E) the size of a western state (e.g., Colorado)

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Answer:

false

Explanation:

Answer:

What are we supposed to find, if it is kinetic energy then this is the solution.

K.E=1/2mv^2

K.E= kinetic energy

M=mass

V=velocity

K.E =0.5*55*0.6^2

K.E=9.9J

Explanation:

The power of a statistical test refers to its ability to detect statistically significant differences between groups or variables.

It is defined as 1-β, where β represents the probability of making a Type II error, or failing to detect a true difference. In other words, a high power value means that the test is more likely to correctly identify significant differences, while a low power value means that it is more likely to miss them. Power is influenced by a variety of factors, including sample size, effect size, and alpha level, among others. It is an important consideration when designing and interpreting statistical analyses.

The power of a statistical test is defined as the probability of rejecting the null hypothesis when it is false, or in other words, the probability of detecting a statistically significant difference when one actually exists. It is often denoted by the symbol "1-β", where β represents the probability of making a Type II error, which is the error of failing to reject the null hypothesis when it is false.

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