Three small lamps, R₁ = 4.8 ft, R₂ = 3.1 , and R3 = 2.4 2 are connected to a 9.0 V battery, as shown below. R₁ R3 ¹9.0 V (a) What is the equivalent resistance of the circuit? (b) What is the cu

Answer: 80.5 miles

Explanation:

3.5 x 23 = 80.5

The acceleration due to gravity on this planet is 19.6 m/s².

Acceleration is the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration of all other motions.

In mechanics, gravity also known as gravitation is the constant force of attraction that pulls all things together. It has little impact on determining the intrinsic characteristics of common stuff because it is by far the weakest known force in nature.

Calculation:

The acceleration due to gravity on the earth's surface is given by

g = ​\(\frac{GM}{R^{2} }\)

Now, Mp ​= \(\frac{M}{2}\)​, Rp ​= \(\frac{R}{2}\)​

The acceleration due to gravity on the new planet is:

\(g_{p}\) = \(\frac{GM_{p} }{R_{p} ^{2} }\)  ​​=  \(\frac{GM/2}{R^{2} /4^{} }\) ​= 2g 

\(g_{p}\) ​= 2 × 9.8 = 19.6 m/s².

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A star is 230 light years away. the light we see tonight from that star left it

Instead of time, a light-year counts distance (as the name might imply). One light-year, or roughly 6 trillion miles, is the distance a light beam travels in one year on Earth (9.7 trillion kilometers).

Since light takes around 230 years to travel the distance from the star to us, the light we see tonight departed that star 230 years ago.

Because of this, astronomers frequently discuss the "lookback time" when seeing far-off celestial objects. The older the light we witness from an object, the further away it is, and the further back in time we can see.

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1. BaCl2+K2SO4⇒BaSO4+KCl

2. Na+FeCl3⇒Fe+NaCl

Given

Word equation

Required

Skeleton equation

Solution

A chemical reaction can be expressed in terms of:  

The skeleton equation is still in unbalanced form  

So only chemical formulas of reactants and products and the relative amounts of the reactants and products are not included

For example :

• word equation

Ethane + Oxygen ⇒ Carbon dioxide + Water

• skeleton equation

C₂H₆ + O₂ ⇒ CO₂ + H₂O

• balanced equation

2C₂H₆ + 7O₂ ⇒ 4CO₂ + 6H₂O

1.

word equation

barium chloride ____ + potassium sulfate ____ → barium sulfate _____ + potassium chloride _____

skeleton equation

BaCl2+K2SO4⇒BaSO4+KCl

2.

word equation

sodium+iron(III) chloride→iron+sodium chloride

skeleton equation

Na+FeCl3⇒Fe+NaCl

Para hacerlo a m/s un método muy práctico es sólo dividir entre 3.6, por cuestiones de conversiones, lo puedes comprobar.

212 km/hr /3.6 = 58 m/s

Comprobación :

V= d / t

V= 212 m / 18000 seg <---- nota que aquí los segundos son de las 3.1hrs  

V= 58 m/seg

Answer:

Yes

Explanation:

Answer:

im postive its D) loudspeaker

Answer:

foam wall

Explanation:

ap3x

Answer:

She can travel 24 miles in 3 hours.

(8) A car starting with a speed v skids to a stop over a distance d, which means the brakes apply an acceleration a such that

0² - v² = 2 a d → a = - v² / (2d)

Then the car comes to rest over a distance of

d = - v² / (2a)

Doubling the starting speed gives

- (2v)² / (2a) = - 4v² / (2a) = 4d

so the distance traveled is quadrupled, and it would move a distance of 4 • 15 m = 60 m.

Alternatively, you can explicitly solve for the acceleration, then for the distance:

A car starting at 50 km/h ≈ 13.9 m/s skids to a stop in 15 m, so locked brakes apply an acceleration a such that

0² - (13.9 m/s)² = 2 a (15 m) → a ≈ -6.43 m/s²

So the same car starting at 100 km/h ≈ 27.8 m/s skids to stop over a distance d such that

0² - (27.8 m/s)² = 2 (-6.43 m/s²) d → d ≈ 60 m

(9) Pushing the lever down 1.2 m with a force of 50 N amounts to doing (1.2 m) (50 N) = 60 J of work. So the load on the other end receives 60 J of potential energy. If the acceleration due to gravity is taken to be approximately 10 m/s², then the load has a mass m such that

60 J = m g h

where g = 10 m/s² and h is the height it is lifted, 1.2 m. Solving for m gives

m = (60 J) / ((10 m/s²) (1.2 m)) = 5 kg

(10) Is this also multiple choice? I'm not completely sure, but something about the weight of the tractor seems excessive. It would help to see what the options might be.

Answer:

Energy = 21.42 Joules

Explanation:

Given the following data;

Charge = 2.38 C

Potential difference, v = 9 V

To find the energy gained;

Mathematically, it is given by the formula;

Energy = charge * potential difference

E = 2.38 * 9

E = 2.38 * 9

E = 21.42 Joules

Answer:

21.42

Explanation:

Acellus

Answer:

4.7m

Explanation:

Given parameters:

Mass of the book  = 1kg

Gravitational potential energy  = 46J

Unknown:

Height of the shelf  = ?

Solution:

The potential energy is due to the position of a body above the ground.

        Gravitational potential energy  = mgh

m is the mass,

g is the acceleration due gravity  = 9.8m/s²

h is the height which is unknown

                       46  = 1 x 9.8 x h

                       h  = 4.7m

An algorithm that calculates the time a train needs to arrive at a destination given speed and distance \(Time=\frac{Distance}{Speed}\).

The amount of the shift in approach per unit of time or the size of the displacement over time for an object can be used to describe speed, which would be a scalar quantity in everyday language and kinematics.

The maximum speed that can be maintained when a period grows closer to zero is the starting speed.

By dividing the object's distance traveled by the duration of the interval, the mean pace of the object for the given period is calculated. Speed and velocity are not always the same thing.

The algorithm to calculate the time required will be,

Let the distance covered by the train is D and the speed of the train be S.

Then, the time taken by the train will be,

T = D/S

Here, D is the distance and S is the speed.

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Answer:

The statements are not given, so I will answer in a general way.

We know that when one object is moving with a velocity V, and it wants to come to stop, it needs to accelerate in the opposite direction to the initial velocity (Or decelerate).

As larger this acceleration is, the faster the object will come to a full stop.

Now we have a car (with a mass m) and a truck (with a mass M) are moving with a velocity V.

We can assume that the mass of the truck is larger than the mass of the car, then:

M > m.

Now also remember Newton's second law:

F = m*a

Force equals mass times acceleration.

And we know that both vehicles stop with the same stopping force.

Then the acceleration (deceleration actually) that experiences the car is:

a = F/m

While the acceleration that experiences the truck is:

a' = F/M

Because M is larger than m, we will have:

a' < a

Then the deceleration of the truck is smaller than the one of the car, which means that the car will come to a full stop faster than the truck (or the truck needs more time to stop)

Answer:

P = 9800 [Pa]

Explanation:

In order to calculate the pressure at the bottom, we must use the following formula.

P = Ro*g*h

where:

P = pressure [Pa] (units of pascals)

Ro = density of the water = 1000 [kg/m³]

g = gravity acceleration = 9.8 [m/s²]

h = height = 1 [m] (because its half of the portion, the full height is 2 m)

P = 1000*9.8*1

P = 9800 [Pa]

Answer:

A force is a push or pull upon an object resulting from the object's interaction with another object.

Systems always have inputs and outputs.

Explanation:

In a two-slit interference pattern, the ratio of slit separation to slit width can be calculated using the formula dsinθ = mλ, where d is the slit separation, θ is the angle between the central axis and the fringe, m is the order of the fringe, and λ is the wavelength of light.

Given that there are 17 bright fringes within the central diffraction envelope, we can assume that the central fringe is the zeroth order and the 17th fringe is the 8th order. Therefore, m = 8.

We are also told that the diffraction minima coincide with the two-slit interference maxima. This occurs when the path difference between the two slits is equal to an integer multiple of the wavelength, which happens at the minima. At the maxima, the path difference is equal to an odd multiple of half the wavelength.

Since there are 17 bright fringes within the central diffraction envelope, there are 16 dark fringes. This means that the two-slit interference maxima occur at the positions of the 8th and 9th dark fringes. Therefore, the path difference between the two slits is equal to 8.5 times the wavelength.

Substituting the values into the formula, we get d/w = 8.5/sinθ. We can use the fact that the first minimum occurs at θ = sin⁻¹(λ/d) to find d/w.

Therefore, d/w = 8.5/sin(sin⁻¹(λ/d)) = 8.5/(λ/d) = 8.5d/λ.

In conclusion, the ratio of slit separation to slit width is 8.5d/λ if there are 17 bright fringes within the central diffraction envelope and the diffraction minima coincide with two-slit interference maxima.

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The absorbance of ASP and Sal standard mixed solutions in different concentrations (0.05 to 30 and 0.02 to 8 ug/ml for ASP and SAL, respectively) was measured against solvent (H2O; ACN 90: 10v/v) as blank at 229 nm and 296 nm.

Calibration graphs were created by graphing absorbance versus concentrations and using regression equations.

The calibration graphs revealed that ASP and SAL follow Beer's law. ASP and SAL at values of 0.3-30 and 0.1-10 pg/ml, respectively. Statistical parameters were computed, demonstrating that Tcal values were greater than Ttab values. Good linearity was detected, with R2 values of (0.9996 and 0.9992, respectively) for ASP and SAL. The calibration plot's linear regression results indicate a solid linear connection between concentration fluctuation and response.

Regression analysis was used to determine linearity.

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Answer:

A Both physical and chemical changes.

Explanation:

Answer:firt answer corrcect who answerd

Explanation:

Feather, Biscuit, a 1st grader, Elephant is order of  LEAST inertia to MOST inertia.

Inertia is the resistance of an object to any change in motion. Inertia is proportional the mass of the object: in fact, as we experience in common situations, the larger the mass of an object, the more difficult it is to change its motion.

Inertia of an object is its inherited property. It is the measure of its mass. It is clear that the inertia of an object depends directly on its mass. Mass of an object is the amount of matter contained in it. It is same at every location.

Given that in the case four thing Biscuit, Feather, Elephant, a 1st grader out of which Feather, Biscuit, a 1st grader, Elephant is order of  LEAST inertia to MOST inertia.

Feather, Biscuit, a 1st grader, Elephant is order of  LEAST inertia to MOST inertia.

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Answer:That only applies to highly polished surfaces, eg mirrors.

If you take a high quality laser (ie with low divergence) and aim it at a wall, you can see the spot where the laser beam reaches the wall from anywhere with a direct line-of-sight to the spot where the laser beam reaches the wall. This due to micro imperfections on the surface of the wall. At a microscopic level, the wall surface is very rough and pointing in all directions.

As to why, a beam of light bounces of a highly polished surface, I can only surmise that it is essentially due to kinematics, ie the only force opposing the light beam is normal to the surface, hence there no forces along the reflective surface. Since there are no forces along the reflective surface, the speed component of light along the reflective surface remains unchanged. However, on the plane perpendicular to the reflective surface the, the light photons bounce off at the same speed at which the hit the reflective surface because the mass of the reflective surface is much much much larger than the mass of the photons, which means that the reflective surface won’t move at all. Since conservation of momentum requires that momentum after the collision be the same as the momentum before the collision then the only way for that to happen is if the velocity of the photon perpendicular to the reflective surface is of exactly the same magnitude but in the opposite direction. Vector resolution of the speed component of the reflected beam means that the angle of reflection must be the same as the angle of incidence.

Explanation:

Answer:

Initial momentum: \(0\; {\rm kg \cdot m \cdot s^{-1}}\).

Final momentum: \(150\; {\rm kg \cdot m\cdot s^{-1}}\).

Force on the mass (assuming that the force is constant): \(75\; {\rm N}\).

Impulse on the mass: \(150\; {\rm kg \cdot m \cdot s^{-1}}\).

Explanation:

The momentum \(p\) of an object is equal to the product of mass \(m\) and velocity (a vector) \(v\).

The initial momentum of this mass was \(0\; {\rm kg \cdot m \cdot s^{-1}}\) since the velocity of this object was initially \(0\; {\rm m\cdot s^{-1}}\).

At \(v = 3\; {\rm m\cdot s^{-1}}\), the momentum of this mass (\(m = 50\; {\rm kg}\)) would be:

\(\begin{aligned}p &= m\, v \\ &= 50\; {\rm kg} \times 3\; {\rm m\cdot s^{-1}} \\ &= 150\; {\rm kg \cdot m \cdot s^{-1}}\end{aligned}\).

Assume that the external force \(F\) on this mass is constant. By Newton's Second Law of motion, the external force on this mass would be equal to the rate of change in the momentum of this mass.

Since the momentum of this mass increased by \(\Delta v = 150\; {\rm kg \cdot m \cdot s^{-1}}\) in \(\Delta t = 2\; {\rm s}\), the external force on this mass would be:

\(\begin{aligned}F &= \frac{\Delta v}{\Delta t} \\ &= \frac{150\; {\rm kg \cdot m \cdot s^{-1}}}{2\; {\rm s}} \\ &= 75\; {\rm kg \cdot m \cdot s^{-2}} \\ &= 75\; {\rm N}\end{aligned}\).

The impulse of an external force on an object is equal to the change in the momentum of that object. Since the change in momentum of this mass was \(\Delta v = 150\; {\rm kg \cdot m \cdot s^{-1}}\), the corresponding impulse would also be \(150\; {\rm kg \cdot m\cdot s^{-1}}\):

\(\begin{aligned}J &= \Delta v \\ &= 150\; {\rm kg \cdot m\cdot s^{-1}} \\ &= 150\; {\rm N \cdot s}\end{aligned}\).

Answer:

Explanation:

operantly conditioned; positively reinforced

Answer:

AM/FM radio is a perfect type of technology.

A smart phone is also a great presentation of technology.

Explanation:

have great day

Answer Body mechanics is a term used to describe the ways we move as we go about our daily lives. It includes how we hold our bodies when we sit, stand, lift, carry, bend, and sleep. ... Good body mechanics means using the body's strength to the best mechanical advantage to do a task efficiently and without injury.

Explanation:

v(speed) = wavelenght x frequency

v = 0.579 m x 4 hz = 2.32 m/s

The internal mitochondrial membrane (IMM) features as a chemical and electrical insulator. It creates compartments by dividing the matrix from the cytosolic surroundings due to the fact it's miles substantially less permeable to small molecules and ions than the outer membrane.

The internal mitochondrial membrane is both an electrical insulator and a chemical barrier. sophisticated ion transporters exist to permit specific molecules to pass this barrier. There are several antiport systems embedded within the inner membrane, allowing the change of anions between the cytosol and the mitochondrial matrix.

The inner membrane is likewise loaded with proteins worried in electron delivery and ATP synthesis. This membrane surrounds the mitochondrial matrix, in which the citric acid cycle produces the electrons that tour from one protein complex to the next within the internal membrane.

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Answer:

v = 40 m/s

Explanation:

Given that,

A man stands 80m in front of a cliff face.  He makes aloud bang and listens for the  echo. He makes a loud bong once every second.

He hears an echo exactly half way between  the bang that caused it and the next hang.

Distance = 40 m, t = 1 s

The speed of sound is given by :

\(v=\dfrac{d}{t}\\\\v=\dfrac{40\ m}{1\ s}\\\\v=40\ m/s\)

Hence, the speed of sound is equal to 40 m/s.

Answer:

Explanation:

While pure science deals with knowledge discovery Applied science deals with knowledge use

Answer:

The reason that the Greeks might not have had any questions to the evidence that heavier objects fall faster than light objects is because they would be questioning statistics which is that heavier objects and lighter objects do not fall at different rates but at the same its just the pending on the weight ex. a brick and a feather you drop a brick it falls quick because of its weight and a feather because of it's weight it falls a lot slower but at the measurement of the objects falling quicker than the other they don't its irrelevant.