Fehling's solution is added to the counters of test tube b after about 3 minutes and it turns brick red.what food substance was used?

The speed of the rocket at the end of 10 seconds is 66.7 m/s.

The speed of the rocket at the end of 10 seconds is calculated as follows;

F = mv/t

where;

F = (m/t)v

F = (0.025 kg /s) x 80 m/s

F = 2 N

F = ma

a = F/m

a = 2/(0.3)

a = 6.67 m/s²

v = at

v = 6.67 x 10

v = 66.7 m/s

Thus, the speed of the rocket at the end of 10 seconds is 66.7 m/s.

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The best name for the ionic bond that forms between them is Beryllium Bromide.

We have been provided with data,

Beryllium charge, q = 2

Bromine charge, q = -1

As we know the valance electron of Be is +2  and the valance electron of bromine is -1. Since one is metallic and the other is non-metallic.

Now, when they combine they exchange valance electron, and bromine change into bromide so they form Beryllium Bromide.

So, the best name for the ionic bond that forms between them is Beryllium Bromide.  

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The stone will strike the ground with velocity of 33.5 m/s.

What is velocity:

What is displacement:

Here,

Stone is dropped freely from rest, so it's Initial velocity will be zero.

u = 0 m/s

displacement is equal to half of total height.

y = h/2

since Stone is dropped freely, a=g ( acceleration of gravity)

According to Newton's equation of motion:

y = u* t + 1/2 (at^2)

h/2 = 0 + 1/2 (gt^2)

h = g* t^2 -----1

now at t= t+1 , displacement y = h

h = u* t + ½ g (t + 1)²

h = ½ g (t + 1)² -----2

comparing both equations,

g* t^2 = ½ g (t + 1)²

2t² = (t + 1)²

2t² = t² + 2t + 1

t² − 2t = 1

t² − 2t + 1 = 2

(t − 1)² = 2

t − 1 = ±√2

t = 1 ± √2

Since t > 0, t = 1 + √2.  

So t+1 = 2 + √2.

At that time, the speed is:

v = at + u

v = g (2 + √2) + 0

v = g (2 + √2)

If g = 9.8 m/s²,

v = 33.5 m/s.

The stone will strike the ground with velocity of 33.5 m/s.

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The mass of a body if the acceleration the body used to move is given as 5 m/s-2 will be 3 kg.

Force is defined as the push or pulls applied to the body. Sometimes it is used to change the shape, size, and direction of the body.

Force is defined as the product of mass and acceleration. Its unit is Newton.

Given data;

Force,F = 30 N

Mass,m =  kg

Acceleration,a = 5 m/s²

The force is found as;

F=ma

30 N =m kg × 5 m/s²

m=3 kg

Hence the mass of a body will be 3 kg.

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The magnetic flux through one turn of the wire making the solenoid is 7.88*10^-7 T m^2.

B = unI

= 4pi*10^-7*(100/0.1)*2

= 0.00251 T

Therefore, Flux = B*Area

= 0.00251*pi*(0.01^2)

= 7.88*10^-7 T m^2

Magnetic flux is a measurement of the entire magnetic discipline which passes thru a given vicinity. It's far a useful device for helping describe the outcomes of the magnetic pressure on something occupying a given vicinity. The size of the magnetic flux is tied to the specific location chosen.

The SI unit of magnetic flux is the Weber (Wb). A flux density of 1 Wb/m2 (one Weber in keeping with rectangular meter) is one Tesla (T).

A magnetic subject describes a location in which a magnetic pressure may be felt. Magnetic flux describes how a good deal of magnetic discipline passes through a place.

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The deflection angle would have been 37.29º if the prism had been made of polystyrene plastic.

As we know that the deflection angle is an angle between the moving object from its directed course.

In the following question the deflection angle as laser enters the beam is, B = 22.6º

refractive index of glass, n1= 1.52

refractive index of polystyrene plastic, n2 = 1.59

Now when we see for the second surface then ,

B  = 45º - 22.6º

B  = 22.40º

So from Snell's law:

n1 sinθ1 = n2 sinθ2

→ sin B / sinθ = n1 / n2

sinθ = (sin 22.40º) × ( 1/ 1.59)

θ = 37.29º

Thus, the deflection angle should be 37.29º if the prism is made of polystyrene plastic.

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Expenses including those for linen service, ice, and paper goods might fluctuate depending on demand. Other variables are constants. No change occurs to it. This is further explained below.

Generally, Fixed expenditures, in contrast to the more unpredictable variable costs like advertising, happen regularly at the same time each year regardless of fluctuations in revenue or other variables. It doesn't get the performance bus.

Here, we are given with table.

[tex]\begin{tabular}{|c|c|c|}Other Expenses & Variable Expense & Fixed Expense. \\ Linen rental & $X$ & \\ piano rental & & $X$ \\ ice & $X$ & $X$ \\insurance & & $X$ \\ Pension plan & & $X$ \\Snow shoveling dees cparkinglot) & & \\Paper products & $X$ & $X$ \\ Kituen equipment & & $X$ \\ lease (mixer) & & \\Longterm debt. & & \\ Realestate tax. & & \\\end{tabular}[/tex]

In conclusion,

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Answer:

Zodiac signs

Explanation:

Answer:

The horizontal component of velocity (B) remains constant because no components of the external force act on this component of velocity

(the force of gravity affects the vertical component of velocity)

A hydroelectric power station turns energy from kinetic into electrical.

Thus, we can conclude that hydroelectric power station turns energy from kinetic into electrical.

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Answer:

A object in rest will remain in rest and a object in motion will move at a constant pace and in a straight line unless a unbalanced force acts upon it

Explanation:

give brainliest if you'd like

Newton's first law: the law of inertia

Newton's first law states that

if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

hope you understand thank you.

Answer:

slows down

Explanation:

slow down and speed up

The final velocity for object a is 5.6 m/s in the opposite direction.

From the conservation of momentum, we know that the collision between two objects will result in the conservation of initial momentum and the final momentum i.e.,

                                    Pi  =  Pf

It is given that,

                      m₁ = 1.5 kg

                       u₁ = 11.2 m/s

                       m₂= 4.5 kg

                        u₂= 0

                         v₂= 5.6 m/s

We need to find v₁.

              Using momentum conservation

               m₁ u₁ + m₂ u₂ =  m₁ v₁ + m₂ v₂

               1.5 × 11.2 + 4.5 × 0 =  1.5 × v₁ + 4.5 × 5.6

                                   16.8 + 0 =  1.5 × v₁ +  25.2

                                  -8.4/ 1.5  =  v₁

                                    v₁ = - 5.6 m/s

Here, the negative sign shows that body is moving in the opposite direction.

Hence, option (d) is correct.

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Hello!

Recall that the magnetic field produced by a solenoid with a time-varying current is given by:

[tex]B(t) = \mu_0 ni(t)[/tex]

[tex]B(t)[/tex] = time-varying magnetic field (T)

[tex]\mu_0[/tex] = Permeability of free space (4π × 10⁻⁷ Tm/A)

[tex]n[/tex] = number of turns/meter (20000)

[tex]i(t)[/tex] = time-varying current

**Since we have AC current, we can use a sinusoidal function to represent the current.

Let's now figure out the expression for the current.

The typical format of a sinusoidal function for current is:

[tex]i(t) = Asin(\omega t + \phi)[/tex]

A = amplitude (max current, 10 A)
ω = angular frequency (rad/sec)
φ = phase shift (we will assume there is not one since it is not given.)

We are also assuming we are starting from t = 0 s.

Now we need to solve for the angular frequency to complete our equation.

If the current changes direction every 0.01 seconds, that means that the PERIOD of the current is double this (aka, how long it takes for the current to repeat the same magnitude and direction).

Think about AC current like an oscillating mass on a spring. When the current changes directions, (every 0.01 sec), there is momentarily no current (temporarily no moving charge). The peak current will occur at the halfway point between each change in direction, or every 0.005 sec. Additionally, using this analogy, the mass on a spring changes direction TWICE before it returns to its original position, which is why our period here is double the time it takes for the current to switch directions.

So:
[tex]T = 2(0.01) = 0.02[/tex]

Now, we can convert from period to angular frequency.

[tex]\omega = \frac{2\pi}{T} = \frac{2\pi}{0.02} = 100\pi[/tex]

We have the current equation as:
[tex]i(t) = 10sin(100\pi t)[/tex]

So, our magnetic field produced by the solenoid will be:

[tex]B(t) = (4\pi *10^{-7})(20000)(10sin(100\pi t) )= 0.251sin(100\pi t)[/tex]

Since we have that figured out, we can use Faraday's Law to find the induced emf:
[tex]\epsilon = -N \frac{d\Phi_B}{dt}[/tex]

ε = Induced EMF (V)
N = number of loops in COIL (10 loops)

[tex]\Phi_B[/tex] = Magnetic Flux (Wb)

The area of the coil is constant so we can rewrite the equation as:
[tex]\epsilon = -N * A\frac{dB}{dt}[/tex]

Where 'A' is the cross-sectional area of the COIL.

Let's calculate that:
[tex]A = \pi (0.01^2) = 0.000314 m^2[/tex]

Now, let's calculate the induced emf. Using our equation for 'B' we got earlier:
[tex]B(t) = 0.251sin(100\pi t)\\\\\frac{dB}{dt} = (100\pi)(0.251)cos(100\pi t) = 78.957cos(100\pi t)[/tex]

Combining this into Faraday's equation:
[tex]\epsilon = -N * A\frac{dB}{dt}\\\\\epsilon = -(10)(0.000314)(78.957cos(100\pi t) = -2.48cos(100\pi t)[/tex]

The magnitude is the absolute value, so:
[tex]\epsilon = \boxed{2.48cos(100\pi t) \text{ V}}[/tex]

Answer:

The heat from the water deforms the sides because it melts the plastic

The engine is rated at 400 horsepower at 6,400 rpm and 350 lb-ft of torque starting from 1,600 to 5,200 rpm.

Horsepower:

The power an engine produces is referred to as horsepower. It is determined by the amount of force required to move 550 pounds one foot in a second or 33,000 pounds one foot in a minute. The speed at which the work is completed serves as a gauge of power.

Equation to calculate horsepowe:

Simple math can be used to get horsepower: Horsepower = Torque x RPM / 5,252. To test it out for yourself, use the horsepower calculator below. Knowing a few more fundamental terminology and formulas can help you comprehend how a dynamometer determines torque and power.

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You should slow your pwc to "slow, no wake speed" when within 100 feet of anchored vessels or non-motorized craft.

This is the process of operating a personal watercraft at the slowest possible speed.

This helps to maintain steerage which prevents different forms of accident or risks when in motion in the water.

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The mechanical energy of the river water per unit mass is 887.4 J/kg

The power generated is 452.574 MW.

Given:

Average velocity (v) = 3 m/s

Rate = 510 m³/s

Height (h)  = 90 m

We know, that mechanical energy is the sum of potential energy and kinetic energy.

So,

E = [tex]\frac{1}{2}[/tex]×m×v² + m×g×h                    

and energy per mass unit is

E/m =  [tex]\frac{1}{2}[/tex]×v² + g×h

E/m =  [tex]\frac{1}{2}[/tex]×3² + 9.81×90

E/m = 887.4 J/kg

So, mechanical energy per unit mass is 887.4 J/kg.

Power generated is expressed as;

Power generated = energy per unit mass ×rate×density

Density of water = 1000 kg/m³

Power generated = 887.4× 510× 1000

Power generated = 452574000 W

So, the power generated is 452.574 MW.

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Answer:

The current in a circuit can be determined as total amount of charge passes through a wire's full cross section area.

Explanation:

The current is a flow of electrical charge carriers electrons.

The current is denoted with symbol uppercase letter I.

The standard unit for current is the ampere, symbolized by A.

Current is the change in charge with change in time.

Hence we can say that,

The current in a circuit can be determined as total amount of charge passes through a wire's full cross section area.

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The force of the body is obtained as 81144 N.

The term pressure is defined as the mass per unit area of a body. We have the pressure at the top of the tank as 225400 Pa and the area of the tank as 0.6 m by 0.6 m.

Thus;

Pressure = Force/Area

Force = Pressure * Area

Force = 225400 Pa *  0.6 m *0.6 m

Force = 81144 N

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Answer:

An electrically polarized object can have zero net charge, while a charged object cannot have zero net charge.

I hope this helps :D

Considering the definition of potential energy, the potential energy of the bungee jumper is 90,889.65 J.

Potential energy is the energy that measures the ability of a system to do work based on its position. In other words, this is the energy that a body located at a certain height above the ground has.

Gravitational potential energy is the energy associated with the gravitational force. This will depend on the relative height of an object to some reference point, the mass, and the strength of gravity.

So for an object with mass m, at height h, the expression applied to the gravitational energy of the object is:

Ep= m×g×h

Where:

In this case, you know:

Replacing in the definition of potential energy:

Ep= 85 kg × 9.81 m/s² × 109 m

Solving:

Ep= 90,889.65 J

Finally, the potential energy of the bungee jumper is 90,889.65 J.

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The corresponding height of the given parallelogram is 5.4 units

steps involved:

Given that the basis of the parallelogram RSTU is thought to be the line segment RU with vertices R(1, 1) and U(4, 5).

The parallelogram's top is therefore defined as the line segment ST with vertices S(7, 0) and T(10, 4).

The length of a line with endpoints at RU and ST and that is perpendicular to both RU and ST is the length that corresponds to the parallelogram's height.

Given by is the equation for the line segment RU.

Let the slope of the line perpendicular to line RU be m, then provided that two lines are perpendicular, the product of the slope of the two lines is -1.

Consequently, the equation for the line passing through point (1, 1) and perpendicular to RU is

Therefore, the corresponding height of the given parallelogram is 5.4 units

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Answer:

according to the Archimedes principle , the floating substance displaces some liquid, so when the ice melts ,there will be no change in the water level as the melted ice will occupy the same volume as it was occupying earlier.

Explanation:

Answer: efficiency =WQH=1−TCTH

Explanation: i looked it up

Answer:

The angle of launch is 52.49 Degree.

Explanation:

The Range R and Height H of a thrown object is calculated using the formula,

R=V₀² sin(2φ)/g

H=V₀²sin²(φ)/g

From these equations it can be written,

V₀²=R g/ sin(2φ)

V₀²=H g/ sin²(φ)

These values are equal so it can be written by equating these equations,

R g/sin(2φ)=H g/sin²(φ)

tan(φ)= 2H/R

Given H=72.3 m and R=111 m, the angle of launch is,

tan(φ)= 2*72.3/111

φ= 52.49 Degree.

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The speed or the linear velocity of the stone is 9.93 m/s; option C

The linear velocity of the stone is given by the formula below:

where w is angular velocity and r is radius.

w = θ/t

1 complete revolution = 2π radians

5 revolutions = 10π radians

w =  10π/4.4 rad/s

v = 10π/4.4 rad/s * 1.4

v = 9.93 m/s

In conclusion, the linear velocity is obtained from the angular velocity and radius of the string.

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Answer:

In solid it is high because the molecules are closely packed.

In liquid it is lesser than solids as they are loosely

packed.

In gas it is least because they are very loosely packed

The centripetal acceleration of the satellite will be less than acceleration due to gravity on earth (g).

Calculation of centripetal acceleration of satellite:

Let the radius of earth be, R

Let the radius of satellite be, R'

Let the gravitational constant be, G

Let the acceleration due to gravity (earth) be, g

Let the mass of earth be M

Step 1:

We know that the orbital velocity of satellite can be given as:

v =√GM/R'     - ( 1 )

Thus, the centripetal acceleration of the satellite will be:

a_c = v²/R' = GM/R'²            - ( 2 )

The acceleration due to gravity is given as:

g = GM/R²                             - ( 3 )

Step 2:

From equation 2 and 3 we get:

a_c/g = GM/R'² ÷ GM/R²

a_c/g = R²/R'²  < 1  

Step 3:

Thus we get:    

a_c/g < 1

a_c < g

Therefore, the centripetal acceleration of the satellite is smaller than acceleration due to gravity on earth.

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