Experiment: Group 1 drinks 500 mL of coffee a day.
group 2 drink 500 mL of tea a day, group 3 is a
control group. At the end of 60 days all participants
blood pressure is tested.
Write a scientific question for the experiment. Be
sure to include the independent and dependent
variable in your question,

The maximum number of lamps that can be lighted at the same time without blow up of the fuse is 11.

The rate of performing labor is referred to as power. The amount of work (W) to the amount of time (T) is the ratio (t). Power(P)=Time(t) Work(W) In honor of physicist James Watt, the SI system of units uses the symbol W for power. Electric charge passes past a point in a circuit at a constant pace known as current. The rate at which an electric charge flows is defined as current. The potential difference in charge between two sites in an electrical field is known as voltage, also known as electromotive force.

Power= V*I

          =110 *5

          =550 watt

no. of lamps= 550/5

                   =11 lamps.

The maximum number of lamps that can be lighted at the same time without blow up of the fuse is 11.

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Answer:

Energy, in physics, the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another.

Explanation:

Hope this helps!

A VfL (Vertical Field LED) backlighting system is commonly used in LCD (Liquid Crystal Display) televisions.

LCD TVs rely on a backlight to illuminate the liquid crystal layer, which controls the passage of light to create the visual image. The VfL technology is a specific type of LED backlighting arrangement used in certain LCD TV models. In a VfL backlighting system, the LEDs (Light-Emitting Diodes) are positioned vertically along the edges of the LCD panel.

The light emitted by these LEDs is directed across the panel using light guides or optical films, illuminating the liquid crystal layer uniformly. One advantage of VfL backlighting is its ability to provide consistent illumination across the LCD panel, reducing any potential inconsistencies in brightness or color uniformity. The vertical orientation of the LEDs allows for more precise control over light distribution, improving overall image quality.

Additionally, VfL backlighting offers potential advantages in terms of power efficiency. By selectively dimming or turning off specific zones of LEDs, local dimming techniques can be employed to enhance contrast and black levels, resulting in improved picture quality while conserving energy. It's important to note that VfL backlighting is just one of several backlighting technologies available for LCD TVs.

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The correct answer is frequency of 1000 Hz. The frequency of an electromagnetic wave is determined by the number of times the electron oscillates in a given amount of time.

An electromagnetic wave is a type of energy wave that is composed of electric and magnetic fields and propagates through space. Electromagnetic waves are created when an electric field couples with a magnetic field. This happens when a charged particle accelerates, causing a disturbance in the electric and magnetic fields. Electromagnetic waves can be described in terms of their frequency, which is the number of times the wave oscillates per second, and their wavelength, which is the distance between two successive peaks of the wave. The frequency and wavelength of an electromagnetic wave determine its type. Different types of electromagnetic waves include radio waves, microwaves, infrared waves, ultraviolet waves, x-rays, and gamma rays.

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Answer:

5 newtons

Explanation:

Just divide them

Answer:

industrial revolution

Explanation:

Two blocks, M1 and M2, are connected by a massless string that passes over a massless pulley . The distance the block M2 move is 3.44 m.

Calculating the problem:

Given:

M₂ = 19 kg

θ = 29 °

when the system is in equilibrium the net force on the system is zero

Fn = 0 = M₁ × g - M₂ × g × sin(θ)

M₁ = 19 × sin(29) kg

M₁ = 9.21 kg

the mass of M₁ is 9.21 kg

when M₁ = 5 kg

The acceleration of system , a = net force /effective mass

a = (M₂ × g × sin(theta) - M₁ × g )/(M₁ + M₂)

a = 9.81 × ( 19 × sin(29) - 5) /(19 + 5)

a = 1.72 m/s²

The acceleration of system is 1.72 m/s²

for t = 2 s

The distance moved by M₂ , s = 0 + 0.5 × a × t²

s = 0 + 0.5 × 1.72 × 2² m

s = 3.44 m

While distance is the length of an object's path, displacement only refers to the distance between an object's starting point and its final location.

Meter (m) is the SI unit for distance. Centimeters (cm) can be used to measure short distances, and kilometers (km) can be used to measure long distances.

A body's mass is the amount of material it contains. The SI unit of mass, the kilogram (kg), is the kilogram. A definition of mass is: Volume x density = mass.

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Iron is magnetic, so any metal with iron in it will be attracted to a magnet. Steel contains iron, so a steel paperclip will be attracted to a magnet too. Most other metals, for example aluminium, copper and gold, are NOT magnetic. Two metals that aren't magnetic are gold and silver.

Answer:

this question is confusing sorry I could not answer it

Answer: im trying to find the same answer too

Explanation

Stephens's temperature would be 101.93 Fahrenheit, therefore he can't go to school today.

It is a scale of temperature used to measure the temperature, the kelvin scale of temperature is also known as the absolute scale of temperature.

It is impossible to have kelvin temperature in a negative value.

As given in the problem Stephen is worried he has a fever. His dad is a scientist though and only has a thermometer that measures in kelvin and measured Stephen's temperature to be 312 kelvin. If Stephens's temperature is above 100 f he isn’t allowed to go to school.

312 kelvin converted in Fahrenheit would be 101.93 Fahrenheit.

(312K − 273.15) × 9/5 + 32 = 101.93°F

Thus, Stephen Can't go to school today.

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Answer:

This relationship is explained by Ohm's law

Explanation:

Ohm's law states that the current flowing through a circuit or a resistor is directly proportional to the voltage across the resistor and inversely proportional to the resistance. Where current is i, voltage is v and resistance is r, Ohm's law can be represented mathematically as

V= IR

An update can be caused by changes to props or state. These methods are called in the following order when a component is being re-rendered.

what is the co ordinates of initial and terminal points?

.

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Nuclear fusion reaction is mainly responsible for the cause of energy radiation from the sun.

Solar energy is created due to this nuclear fusion. The discharge of energy in the sun is 10²⁶ joules per second

There is nuclear fusion of hydrogen into helium molecules.

Takes place in solar nucleus/plasma, because this reaction can occur only in high temperature.

The special type of fusion that take place in sun is proton-proton fusion.

This kind of fusion is responsible for the cause of energy radiance and is a very efficient method of producing energy.

The 2 condition which help H-H atoms come together is large mass of the sun and the force of gravity.

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Answer:

anticline

Explanation:

hope u will understand

Answer:

Got it right on edge 2020

Explanation:

anticline

The law of conservation of mass states that matter cannot be created or destroyed.

The law of conservation of mass states that the mass of the reactant must be equal to the mass of the product.

In 18th century law of conservation of mass was given by Levoisier.

It states that mass is neither created nor destroyed.

Example -

The law of conservation of mass states that matter cannot be created or destroyed.

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Answer:

Metal vase

Explanation:

Pure water is not a good conductor, and neither is plastic or cotton. Metal is the only one of the four that actually is a good conductor. For example, lighting hitting metal, this happens because the lightning connects to anything that has some kind of conductant.

Answer:

9.18/13=0.7062 second

Explanation:

9.18meters devide it by the speed 13m/s

≈0.7062

The pressure of the tank, when filled with water at a depth of 6 m, is approximately 580.124 atmospheres (atm). To calculate the pressure of the tank, one can use the equation: Pressure (P) = Density (ρ) × g × Depth (h)

Pressure (P) = Density (ρ) × g × Depth (h)

Given: Density of water (ρ) = 1000 kg/m³

Acceleration due to gravity (g) = 9.8 m/s²

Depth (h) = 6 m

Using the given values, one can calculate the pressure:

Pressure = 1000 kg/m³ × 9.8 m/s² × 6 m Pressure

= 58800 kg·m⁻¹·s⁻²

Now, let's convert the units to pascals (Pa) using the conversion 1 atm = 1.013 x \(10^5\) Pa:

Pressure = 58800 kg·m⁻¹·s⁻² × (1 atm / 1.013 x\(10^5\) Pa)

Pressure = 580.124 atm

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Answer:a vertical expanse of water stretching between the surface and the floor of a body of water

Explanation:

Let the stick be divided into two parts, A and B, by the point where the two ladybugs are sitting. Let the length of part A be x and the length of part B be (1-x). Then, we have:

x + (1-x) = 1

Let the distance of the midpoint from the end of part A be d. Then, we have:

d = x/2 - (1/7)

Let the mass of the stick be M and the mass of each ladybug be m. Then, we have:M = 7m

The gravitational force acting on the system produces a clockwise moment about the end of part A, which is given by:

Mg(x/2 - d) = Mg(x/2 - (x/2 - 1/7)) = Mg/7

Let the distance of the first ladybug from the end of part A be L1 and the distance of the second ladybug from the end of part A be L2. Then, we have:

L1 = x

L2 = 1 - (1-x) = x

The moments produced by the ladybugs are given by:

mgL1sinθ

mgL2sinθ

mgL1sinθ = mgL2sinθ = Mg/7

Substituting the given values and solving for θ, we get:

sinθ = M/14m = 1/14

θ = 3.87 degrees

Mg(x/2 - d)sinθ

2mgL1sinθ

Substituting the given values and solving for x, we get:

x = 0.315

Substituting this value into the equation for the moment of inertia, we get:

I = 1.08e-5.

Inertia is the property of an object to resist any change in its state of motion. It is a measure of an object's resistance to changes in its velocity, including changes in direction and speed. Objects with more mass have more inertia, and they require more force to be moved or to stop moving. Inertia is described by Newton's first law of motion, which states that an object at rest will remain at rest, and an object in motion will remain in motion with a constant velocity, unless acted upon by an external force.

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Answer:

2. ahead of the package.

Explanation:

Using y' - y = ut - 1/2gt², we find the time, t it takes the package to hit the ground. So, u = initial vertical velocity of package = 0 m/s, y = initial position of package = 3970 m, y' = final position of package = 0 m, g = acceleration due to gravity = 9.8 m/s².

Substituting the variables into the equation, we have

y' - y = ut - 1/2gt²

0 m - 3970 m = 0t - 1/2 × (9.8 m/s²)t²

-3970 m = -(4.9m/s²)t²

t² = -3970 m ÷ -4.9 m/s²

t² = 810.2 s²

t = √810.2 s²

t = 28.5 s

Using v = u' + at, we find the horizontal acceleration of the plane. Since the initial horizontal velocity of the package is that of the plane, u' = 162 m/s, v = 0 m/s since the package stops and t = 28.5 s when the package stops.

So, a = (v - u')/t

a = (0 m/s - 162 m/s)/28.5 s

a = -162 m/s/28.5 s

a = -5.68 m/s²

Using v² = u'² + 2as, we find the horizontal distance ,s where the package stops.

So, s =  (v² - u'²)/2a

Substituting the values of the variables, we have

s =  ((0 m/s)² - (162 m/s)²)/(2 × -5.68 m/s²)

= - 162 m²/s²/(-11.36 m/s²)

= 14.26 m

The horizontal distance d the plane moves after releasing the package is d = u't = 162 m/s × 28.5 s = 4617 m

Since d = 4617 m > s = 14.26 m, the plane would be ahead of the package when the package hits the ground.

The speed of the artillery shell when it hits its target is 100 m/s.

Given:

Initial vertical displacement (y) = 200 m

Vertical displacement at 100 m in the air (y') = 100 m

Final velocity in the vertical direction (vy') = 0 m/s (at the highest point of the trajectory)

Using the equation for vertical displacement in projectile motion:

y' = vy^2 / (2g),

where g is the acceleration due to gravity (approximately 9.8 m/s^2), we can solve for the initial vertical velocity (vy).

100 m = vy^2 / (2 * 9.8 m/s^2),

vy^2 = 100 m * 2 * 9.8 m/s^2,

vy^2 = 1960 m^2/s^2,

vy = sqrt(1960) m/s,

vy ≈ 44.27 m/s.

Now, since the horizontal motion is independent of the vertical motion, the horizontal speed of the shell remains constant throughout its trajectory. Therefore, the speed of the shell when it hits its target is 100 m/s.

Hence, the speed of the artillery shell when it hits its target is 100 m/s.

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Answer:

The resultant velocity has a magnitude of 38.95 m/s

Explanation:

Vector Addition

Given two vectors defined as:

\(\vec v_1=(x_1,y_1)\)

\(\vec v_2=(x_2,y_2)\)

The sum of the vectors is:

\(\vec v=(x_1+x_2,y_1+y_2)\)

The magnitude of a vector can be calculated by

\(d=\sqrt{x^2+y^2}\)

Where x and y are the rectangular components of the vector.

We have a plane flying due west at 34 m/s. Its velocity vector is:

\(\vec v_1=(-34,0)\)

The wind blows at 19 m/s south, thus:

\(\vec v_2=(0,-19)\)

The sum of both velocities gives the resultant velocity:

\(\vec v =(-34,-19)\)

The magnitude of this velocity is:

\(d=\sqrt{(-34)^2+(-19)^2}\)

\(d=\sqrt{1156+361}=\sqrt{1517}\)

d = 38.95 m/s

The resultant velocity has a magnitude of 38.95 m/s

This question is incomplete, the complete question is;

The entropy of an ?-ideal gas changes in the following way as a function of temperature and volume:

ΔS = nRln(V\(_f\)/V\(_i\)) + ∝nRln(T\(_f\)/T\(_i\))

For an adiabatic process, the change in T is determined by the change in V. In this problem you will compute the contributions to S from the V and T terms separately, then add them up to find the total entropy change for an adiabatic process.

Argon gas, initially at pressure 100 kPa and temperature 300 K, is allowed to expand adiabatically from 0.01 m³ to 0.026 m³ while doing work on a piston.

1) What is the change in entropy due to the volume change alone, ignoring any effects of changing internal energy? ΔS = ? J/K

2) For this adiabatic expansion, what is the final temperature?  T\(_f\) =  ? K

Answer:

1) the change in entropy due to the volume change alone, ignoring any effects of changing internal energy is 3.185 J/K.

2) the final temperature is 158.66 K

Explanation:

Given the data in the question;

ΔS = nRln(V\(_f\)/V\(_i\)) + ∝nRln(T\(_f\)/T\(_i\))

P\(_i\) = 100 kPa = 100000 Pa

V\(_i\) = 0.01 m³

V\(_f\) = 0.026 m³

T\(_i\) = 300 K

1)  the change in entropy due to the volume change alone

from the question; ΔS = nRln(V\(_f\)/V\(_i\)) + ∝nRln(T\(_f\)/T\(_i\))

so change in entropy due to the volume change alone is;

ΔS = nRln(V\(_f\)/V\(_i\))

we know that, from ideal gas law; PV = nRT

so, nR = P\(_i\)V\(_i\)/T\(_i\)  ---- let this be equation 1

∴ ΔS = P\(_i\)V\(_i\)/T\(_i\) × ln(V\(_f\)/V\(_i\))

we substitute

ΔS = [( 100000 Pa ×  0.01 m³) / 300 K ] × ln(0.026m³ / 0.01m³ )

ΔS = 3.185 J/K  

Therefore, the change in entropy due to the volume change alone, ignoring any effects of changing internal energy is 3.185 J/K.

2)  Final temperature

we know that, in an adiabatic expansion;

\(PV^Y\) = K

where Y = 5/3

so

\(P_i\)\(V_i^{(5/3)\) = \(P_f\)\(V_f^{(5/3)\)

\(P_f\) = \(P_i\)\(( \frac{V_i}{V_f})^{(5/3)\)

we substitute

\(P_f\) = ( 100000 Pa) \(( \frac{0.01 m^3}{0.026 m^3})^{(5/3)\)

\(P_f\) = 20341.255 Pa

Also from ideal gas law;

PV = nRT

T = PV / nR

so

T\(_f\) = P\(_f\)V\(_f\) / nR

but from equation 1; nR = PV/T

so

T\(_f\) = (P\(_f\)V\(_f\)) / (P\(_i\)V\(_i\)/T\(_i\) )

T\(_f\) = ( P\(_f\)V\(_f\)T\(_i\) / P\(_i\)V\(_i\) )

we substitute

T\(_f\) = ( 20341.255 Pa × 0.026 m³ ×  300 K) / 100000 Pa × 0.01 m³ )

T\(_f\) = 158.66 K

Therefore, the final temperature is 158.66 K

Answer:

\(=1.23m/s^{2} (2 decimal places\)

Explanation:

Answer:

1.23

Explanation:

Because if we divide: 11.1 ÷ 9 = 1.23

to make sure: 1.23 x 9 = 11.07

and that's the closest to 11.1 so it count's as an answer.

The best choice is A. The formula that can be used to calculate the acceleration is a= dv/t

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1 km = 1000 m

1 hr = 3600 s

So, 18 km/hr = (18 * 1000) / (3600) m/s = 5 m/s

And 2 m/s^2 = 2 m/s^2

Now, we can use the formula for final velocity (v) when an object starts with an initial velocity (u) and accelerates at a constant rate (a) for a given time (t):

v = u + at

Plugging in the values, we get:

v = 5 + (2 * 5) m/s v = 15 m/s

To convert this back to km/hr, we use the inverse conversions: v = (15 * 3600) / (1000) km/hr v = 54 km/hr

Therefore, the car’s velocity in km/hr after 5 seconds is 54 km/hr.

The energy of an absorbed photon is \(2.998 * 10^8\) and  the resulting unit for energy is Joules (J).

To determine the energy of an absorbed photon in electronvolts (eV), we can use the equation E = hv, where E represents energy, h is Planck's constant, and v is the frequency of the photon. By substituting the values and units correctly, we can calculate the energy in electronvolts.

To determine the energy of an absorbed photon, one can use the following formula:

energy of absorbed photon = Planck's constant x frequency of radiation

Where Planck's constant is equal to \(6.626 * 10^{-34\) Joule seconds and frequency of radiation is measured in Hertz (Hz).

The energy of an absorbed photon can also be expressed using the wavelength of the radiation instead of its frequency.

The formula for this is:energy of absorbed photon = Planck's constant x speed of light / wavelength of radiation

Where the speed of light is equal to \(2.998 * 10^8\) m/s.In both cases,

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Answer:

Stars are the light bulbs of the universe.

Answer:

Stars are the recycling centers of the universe

Explanation:

I just did on edge C