John added 150 grams of salt to 2.5 liters of water. what is the concentration of the salt solutions​

Answer:

Latent heat

Latent heat is the heat needed to change a state without a change in temperature.

Explanation:

Hope this helps :D

Answer:

Yes! Thinking about it graphically a position vs time graph models meters per second in most cases, making every point on the line have the units m/s. If we want the find the slope we are finding the change between each point and those units would change to m/s/s or m/s^2 giving us the same units for acceleration. Simply put, slope of a velocity graph gives us acceleration.

Explanation:

Explanation:

The potential energy of an object has the following formula

         Potential energy = mgh

      where m = mass of the object

                   g = acceleration due to gravity

                   h = height of the object

This means that the potential energy of an object depends upon its mass, acceleration due to gravity, and height.

In the given situation we have a bucket full of water. If the mass and acceleration due to gravity are not changed, the only way the potential energy can be decreased is by reducing the height of the bucket full of water.

This can be done by: -

         (i) Lifting the bucket full of water in such a way that you

             decrease its height as compared to the bench.

        (ii) Put the bucket full of water on a stool whose height is

            lower than the bench.

Answer:

1.By decreasing it's contents- this decreases the weight of the bucket thus decreasing the potential energy of the bucket.

2.By decreasing the height of the bench we have decreased the amount of potential energy stored in the bucket

Answer:

Tidal energy is alternative source of energy because the energy it produces is free and clean as no fuel is needed and no waste bi-products are produced. It has the potential to produce a great deal of free and green energy.

Answer:

E.) Sound Waves are an example of longitudinal waves.

Explanation:

I was sure either A or E was correct so I had to look it up. In reference to three sources, it is proven that sound waves are longitudinal. Therefore, without a doubt, I would try to go with E. I know D is wrong as well as B most definitely. That is because sound always requires a medium to travel through in order to be heard; additionally sounds don't necessarily have to be a certain rate of loudness in order to be considered of different quality. Therefore leaving you with A, C, or E. Additionally C is a false fact as well. So I highly suggest choosing E because there is sufficient sources to prove that. I'll provide a direct link down below.

https://www.bing.com/search?q=are+sound+waves+longitudinal+waves&cvid=fc17d9f3f744496da334cf10a7daad57&aqs=edge..69i57l2j69i60j5j69i61j69i60l2.5395j0j1&pglt=2339&FORM=ANNTA1&PC=NMTS

The correct statement is sound waves are an example of longitudinal waves.

In a longitudinal wave, the particles are displaced parallel to the direction the wave travels. An example of longitudinal waves is compressions moving along a slinky. We can make a horizontal longitudinal wave by pushing and pulling the slinky horizontally.

Sound is a longitudinal wave that alternately compresses and decompresses the component particles of the medium through which it travels.

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The velocity of the ball in the forward direction is the same as the initial velocity with which it was launched.

A ball is launched from inside a cylindrical device that has been set on a frictionless incline and turned loose. What can be determined about where the ball will land?It can be determined that the ball will land in front of the cylinder.

This can be explained with the help of a few concepts of Physics. When an object moves on an incline without friction, then it can be divided into two components, which are: gravity and normal force.

Here, gravity is acting towards the center of the Earth, whereas the normal force is perpendicular to the incline. Let's suppose that the ball is launched with a certain velocity, which makes it move along the incline and get projected in the forward direction.

If we think of the motion of the ball from the observer's point of view who is standing on the incline, then the motion will appear to be parabolic. This is because the observer would see that the ball is moving forward with a constant velocity, but its vertical position keeps changing due to the effect of gravity.

However, from the observer's point of view who is standing in front of the cylinder, the motion of the ball will look like it is a projectile.

The velocity of the ball in the forward direction is the same as the initial velocity with which it was launched.

But, due to the effect of gravity, the vertical component of the velocity would change, which would result in a parabolic path of the ball. Therefore, the ball will land in front of the cylinder.

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The velocity of the ball in the forward direction is the same as the initial velocity with which it was launched. It can be determined that the ball will land in front of the cylinder. The correct option is The ball will land in front of the cylinder.

A ball is launched from inside a cylindrical device that has been set on a frictionless incline and turned loose. What can be determined about where the ball will land?It can be determined that the ball will land in front of the cylinder.

This can be explained with the help of a few concepts of Physics. When an object moves on an incline without friction, then it can be divided into two components, which are: gravity and normal force.

Here, gravity is acting towards the center of the Earth, whereas the normal force is perpendicular to the incline. Let's suppose that the ball is launched with a certain velocity, which makes it move along the incline and get projected in the forward direction.

If we think of the motion of the ball from the observer's point of view who is standing on the incline, then the motion will appear to be parabolic. This is because the observer would see that the ball is moving forward with a constant velocity, but its vertical position keeps changing due to the effect of gravity.

However, from the observer's point of view who is standing in front of the cylinder, the motion of the ball will look like it is a projectile.

The velocity of the ball in the forward direction is the same as the initial velocity with which it was launched.

But, due to the effect of gravity, the vertical component of the velocity would change, which would result in a parabolic path of the ball. Therefore, the ball will land in front of the cylinder.

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Answer:  the hunter should aim his rifle 3,422 meters above the deer to hit it.

Explanation: We can solve this problem using projectile motion equations. Let's first identify the known variables:

Distance to the deer along the line of sight (horizontal distance): d = 10,181 m

Height of the hill: h = 90 m

Muzzle velocity of the gun: v0 = 100 m/s

Acceleration due to gravity: g = 10 m/s^2

We want to find the vertical distance (height) between the hunter's location and the deer, which we can call y. We can use the following equation for the vertical motion of a projectile:

y = v0tsin(theta) - (1/2)gt^2

where t is the time it takes for the bullet to reach the deer, and theta is the angle between the line of sight and the horizontal (the angle at which the rifle is aimed).

To find t, we can use the fact that the time of flight of a projectile is given by:

T = 2v0sin(theta)/g

We can solve for sine(theta) using the fact that the horizontal distance is related to the time of flight by:

d = v0*cos(theta)*T

Combining these equations, we get:

sin(theta) = d/(2Tv0)

cos(theta) = sqrt(1 - sin^2(theta))

t = T/2

Substituting these values back into the equation for y, we get:

y = (d*t/tan(theta)) - (1/2)gt^2

Now we just need to plug in the numbers and solve for y:

sin(theta) = 90/10,181

theta = arcsin(sin(theta)) = 0.523 degrees

cos(theta) = cos(0.523) = 0.999

T = 2100sin(theta)/g = 3.189 seconds

t = T/2 = 1.595 seconds

y = (10,181*t/tan(theta)) - (1/2)gt^2 = 3,422 meters

Therefore, the hunter should aim his rifle 3,422 meters above the deer to hit it. Note that this assumes no air resistance and that the rifle is perfectly aimed. In reality, the bullet would be affected by air resistance and the trajectory would depend on the accuracy of the rifle and the shooter's skill.

Answer:

maintaining internal balance

Explanation:

this question is in biology not physics

The statement describes an advantage of recorded presentations is that the audience members have the opportunity to provide feedback. Thus, the correct option for this question is C.

A recorded presentation may be defined as a popular format of multimedia content with a duration of several seconds or minutes that significantly expresses the advantages of a product, service, or any idea with the support of interesting graphic images, concise text, and appropriate narration.

According to the context of this question, a recorded presentation delivers an advantage to the audience to provide feedback. This is because the process of recorded PowerPoint presentation gives the actual sense and understanding to the audience similar to the real event.

Therefore, the correct option for this question is C.

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Answer:

the correct answer is option C , 2.0 V( volts ) !!

explanation : Total potential difference = 6 V

Total resistance = ( 3 + 4 + 5 ) ohms = 12 ohms

so , applying ohm's law to the whole circuit , we get :

V/ I = R

6/ I = 12

I = 6/ 12 = 1/2 = 0.5 ( total current ) ampere or A

now Current through 4 Ohms Resistance = 0.5 A

Resistance we know= 4 Ohms

Applying ohm's law :

V/I = R

V/0.5 = 4

V = 0.5 × 4 = 2 V

The potential difference (p.d.) across the resistor is 2.0 V.

The individual voltage drops across each resistor can be simply calculated as V = I*R where R represents the resistance value.

Total potential difference = 6 V

Total resistance = ( 3 + 4 + 5 ) ohms = 12 ohms

so, applying ohm's law to the whole circuit, we get :

V/ I = R

6/ I = 12

I = 6/ 12 = 1/2 = 0.5 ( total current ) ampere or A

Now Current through 4 Ohms Resistance = 0.5 A

The resistance we know= 4 Ohms

Applying ohm's law :

V/I = R

V/0.5 = 4

V = 0.5 × 4 = 2 V

Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperatures remain constant.

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Explanation:

Please mark me as the brainliest answer

Answer:

The electrostatic force is larger by a factor of 8.988E9 / 6.674E-11 = 1.35E20

Explanation:

William gave you all the ingredients, but not the answer.  Being both 1/r^2 forces (resulting from massless mediators in QFT), and with unit charges in the problem (1 coulomb, 1 Kg), separated by unit distance (1m), the only nontrivial numerical values in the problem are the constants of proportionality: Coulomb's constant (k) and Newton's gravitational constant (G).  So to "compare and constrast": the ratio of the forces is simply the ratio of these constants.  The electromagnatic force is 1.35 X 10^20 times stronger than the gravitational force.  Assuming positive charge on both objects (the problem is ambiguous on this), they are repelled, whereas the much weaker gravitational force is attractive.  (Gravity only has one kind of "charge" - it's unsigned - and the force is always attractive).  

The problem doesn't say the objects are pointlike: if they have some extent and are either conductive or made of some dielectric, then things get messy because the charge distribution on the object won't be uniform then, but save that for grad school. :-)

Answer:

Explanation:

A 60W bulb , consumes electrical energy of 60 J per second but it does not give out all the energy in the form of light . Most of the energy consumed by it is wasted in the form of heat . Only a fraction of energy is converted into light energy .

Hence, it is wrong to say that bulb supplies 60 J of light energy each second .

Answer:

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Answer:

Density=mass/volume.

1) we have to calculate the iron volume in liters.

iron volume=second level - first level=49.10 ml-45.50 ml=3.6 ml

3.6 ml=3.6 ml(1 liter / 1000 ml)=0.0036 liters  

2) we calculate the mass iron in kg.

28.5 g=28.5 g(1 kg /1000 g)=0.0285 kg.

2) we calculate the density of iron.

density=0.0285 kg / 0.0036 liters=7.92 kg/L

7.92 kg/l=7.92 kg/L(1000 g/1Kg)(1000 cm³/1 L)=7.92 g/cm³.

From this information the Iron density is 7.92 Kg/L or  7.92 g/cm³.

Explanation:

I hope this helps u! :D

Answer:

7.92 g/cm^3

Explanation:

1 mL = 1 cm^3

density = mass/volume

volume: 49.10 mL - 45.50 mL = 3.60 mL = 3.60 cm^3

mass: 28.5 g

density = (28.5 g)/(3.60 cm^3) = 7.91666... g/cm^3

Answer: 7.92 g/cm^3

The final parameters of the problem are the conservation of charge and the definition of capacitance.

According to the conservation of charge, the total charge in the system before and after the capacitors are connected in parallel must be the same. Therefore, the total charge stored by the capacitors is the same before and after the connection.

According to the definition of capacitance, the capacitance of the equivalent parallel combination of the capacitors is the sum of the individual capacitances. Therefore, the final capacitance of the parallel combination can be calculated as the sum of the capacitances of the individual capacitors.

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Answer:

Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. Ideally, the device preserves the input power and simply trades off forces against movement to obtain a desired amplification in the output force. The model for this is the law of the lever.”

Explanation:

a person can pull approximately 60% of their own weight horizontally along the ground in good conditions. So if we need a 500 lb pull to get something done and we have a single groundman who weighs 200 lb and can therefore generate around 120 lb of pull, how can we accomplish this 500 lb pull? The simple answer is that the groundman can go find 4 or 5 good friends who are willing to drop everything and come and help him pull on the rope.

Answer:

Solution in photo

Explanation:

The elastic potential energy of the spring is 1.6 J.

The elastic potential energy of the spring is the energy stored in the spring and it is calculated as follows;

U = ¹/₂kx²

where;

The given parameters include;

U = ¹/₂kx²

U = ¹/₂ (80) (0.2)²

U = 1.6 J

Thus, the elastic potential energy of the spring is a function of the spring constant and the extension of the spring.

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The magnitude of the Earth's magnetic field at the location is 6.0×10(-6)T.

For finding the magnitude of the Earth's magnetic field at the given location:

Plug the given values into the equation B = emf / (vl).

B = (1.17 V) / [(7.80×10³ m/s) × (25.0 m)]

Multiply the velocities and length together.

B = (1.17 V) / (195,000 m²/s)

Simplify the expression.

B = 5.9999999999999995×10(-6) V/(m²/s)

Express the answer in scientific notation.

B ≈ 6.00×10(-6) V/(m²/s)

Convert V/(m²/s) to T (Tesla).

1 T = 1 V/(m²/s)

B ≈ 6.00×10(-6)

Round the result to the appropriate number significant figures.

B ≈ 6.0×10(-6) T

Therefore, the magnitude is approximately 6.0×10(-6) T or 6.0 μT (microtesla).

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Answer: False.

Explanation:

Over the last century, burning of fossil fuels like coal and oil has increased the concentration of atmospheric carbon dioxide (CO2). This increase happens because the coal or oil burning process combines carbon with oxygen in the air to make CO2.

Hope this helps :)

Answer: Test criteria offers assistance the analyzer(s) to compose the test prepare. They ought to be chosen in understanding with the accessible test exertion. Test scope measures are characterized as a proportion between the test cases required for fulfilling the criteria and those of these which have been executed

Answer 7575

Explanation: the numbers are cool

At speed of about, 6.38 m/s, a bicycle and its rider, with a combined mass of 110 kg , will have the same momentum as a 1300 kg car traveling at 5.4 m/s.

:: Combined mass of rider and bicycle = 110 kg

:: Mass of car = 1300 kg

:: Speed of car = 5.4 m/s

:: Required speed of bicycle = V(assume)

By law of conservation of momentum,

m1 x v1 = m2 x v2,

where, m1 &m2 are masses of bodies, and v1 & v2 are their respective velocities.

Therefore, on putting values, we get,

(1300kg x 5.4m/s) = (110kg x V m/s)

V = (7020 / 110) m/s

V ≈ 6.38 m/s

Therefore, the required speed of bicycle is 6.38 m/s.

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Answer: 1300m

Explain: from km to m times 1000

a) Mutual inductance = 0.108 H; Coupling coefficient = 0.482. b) - 4.95 V.


a) Mutual inductance, M between coil A and coil B can be given as:

M = k√(L_AL_B) here, k is the coupling coefficient, L_A and L_B are the inductances of the coil A and coil B respectively. Since 54% of flux produced by coil A links coil B,

So, K = 0.54

L_A = N_A Φ/I_AL_A

= 8120 × 0.02/6

= 27.07 mH

L_B = N_B Φ/I_BL_B

= 11842 × 0.078/6

= 154.63 mH

M = k√(LALB) = 0.482 × √(27.07 × 0.15463) = 0.108 H

b) The emf induced in coil B can be given as:-

ε = M (dI_B/dt)/L_B

ε = 0.108 × (-6/0.015) / 0.15463 = -4.95 V

Thus, the emf induced in coil B when the current is reversed in 0.015 seconds is -4.95 V.

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The number of electrons that move in a circuit where a current of 2.0 A flows for 2.0 minutes will be \(1.5X10^2^2\). The correct option is C.

Electrical charge carriers, often electrons or atoms deficient in electrons, travel as current. The capital letter I is a typical way to represent current.

A current of 2A passes through a wire for 20 minutes. The number of electrons that crossed the cross-section in this period is

Given that,

Current =2A

Time t= 20min = 20×60s

Let,

n and e be the number and charge of electrons in time t.

So,

The total charge, q(say) in the wire is

q = ne

Hence, the current flowing in time t is

I = q/t

I = ne/t

n = It/e

\(n=\frac{2(20X60)}{1.6X10^{-19}} \\\\n=\frac{2400}{1.6X10^{-19}}\\\\n=1.5X10^{22}\)

Thus, the answer is \(1.5X10^2^2\), means the correct option is C.

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Your question seems incomplete, the missing options are:

\(1.5X10^{21}\\\\1.5X10^{20}\\\\1.5X10^{22}\\\\1.5X10^{21}\\\\1.5X10^{23}\)

Answer: I hope you find it useful

Explanation: Group 2 elements have two valence electrons. The two valence electrons are easily lost in the formation of chemical bonds. Once the two electrons are lost, the atom then has a full outer shell and is therefore more stable.

so,  if an atom has valency 2 , then it means that the atom can combine with 2 other atoms .

The force required to displace the ideal spring by 4 m with a spring constant of 15 N/m is 60 N.

To calculate the force required to displace an ideal spring, we can use Hooke's Law, which states that the force exerted by a spring is directly proportional to its displacement. The formula is:

Force = Spring constant * Displacement

Given that the spring constant is 15 N/m and the spring is displaced by 4 m, we can calculate the force as follows:

Force = 15 N/m * 4 m = 60 N

Therefore, the force required to displace the spring by 4 m is 60 N.

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The new volume of the cylinder after the gas is compressed is 7.03 cubic inches.

Measure atmospheric pressure.

The pressure the atmosphere is exerting at a certain location is known as atmospheric pressure. Normal measurement is done at 14.7 psi, or sea level.

Atmospheric pressure = 14.7 psi

Figure out the gauge pressure.

Gauge pressure = 50 lb/in2

The absolute pressure should be calculated.

Absolute pressure = 64.7 psi

Determine the cylinder's new volume.

New volume = (Absolute pressure - Atmospheric pressure) / Gauge pressure

New volume = (64.7 - 14.7) / 50

New volume = 7.03 cubic inches

Hence, the cylinder's new volume is 7.03 cubic inches.

Complete Question:

What is the volume of the cylinder after the gas is compressed if the gauge pressure of the pneumatic cylinder reads 50lb/in^2 and the absolute pressure is 64.7psi before and after?

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Answer:

Approximately \(4.50 \times 10^{11}\; {\rm s}\).

Explanation:

The speed of light is \(c \approx 3.00\times 10^{8}\; {\rm m\cdot s^{-1}}\).

Note that the standard unit of energy, joule, is a derived unit. In terms of the standard base units:

\(\begin{aligned}1\; {\rm J} &= (1\; {\rm N})\, (1\; {\rm m}) \\ &= (1\; {\rm kg \cdot m \cdot s^{-2}})\, (1\; {\rm m}) \\ &= 1\; {\rm kg \cdot m^{2} \cdot s^{-2}} \end{aligned}\).

Apply unit conversion and ensure that the unit of mass is in the standard unit kilogram (\({\rm kg}\)):

\(\begin{aligned} m &= 1\; {\rm g} \times \frac{1\; {\rm kg}}{10^{3}\; {\rm g}} &= 10^{-3}\; {\rm kg}\end{aligned}\).

Apply the equation \(E = m\, c^{2}\) to find the energy equivalent to \(m = 10^{-3}\; {\rm kg}\) of matter:

\(\begin{aligned}E &= m\, c^{2} \\ &= (10^{-3}\; {\rm kg})\, (3.00 \times 10^{8}\; {\rm m\cdot s^{-1}})^{2} \\ &= 9.00\times 10^{13}\; {\rm kg \cdot m^{2} \cdot s^{-2}} \\ &= 9.00\times 10^{13}\; {\rm J} \end{aligned}\).

Divide energy \(E\) by power \(P\) to find the duration \(t\) of the power consumption:

\(\begin{aligned} t &= \frac{E}{P} \\ &\approx \frac{9.00 \times 10^{13}\; {\rm J}}{200\; {\rm J \cdot s^{-1}}} \\ &= 4.50 \times 10^{11}\; {\rm s}\end{aligned}\).

In other words, the energy equivalent to \(1\; {\rm g}\) of matter could power this fridge for approximately \(4.50 \times 10^{11}\; {\rm s}\).