An object A has a mass of 6kg and a heat capacity of 2 310j/°C. Another object B has a mass of 4.6kg and a heat capacity of 1771j/°C. Determine if the two objects A and B are made from the same substance.​

Answer:

917 N

Explanation:

I hope this helps!!

Answer:

Explanation:

Speed of sound = 331 m /s

speed of jet = 7 .00 Mach = 7 times speed of sound

= 7 x 331 = 2317 m /s

distance to be covered = 5000 x 1000 = 5 x 10⁶ m

Time taken = distance / speed of jet

= 5 x 10⁶ / 2317

= 2.158 x 10³ s

= 35.96 minutes .

Answer:

The value is   \(t =  14.129 \  minutes\)    

Explanation:

From the question we are told that

  The distance of planet Tatoone is  \(d =  1.7 \ AU  =  1.7 *1.496* 10^{11}=2.543*10^{11} \ m\)

   The  speed of light is  \(c =  3.0*10^{8} \  m/  s\)

Generally the time taken is mathematically represented as

     \(t =  \frac{d}{c}\)

=> \(t =  \frac{2.543*10^{11}}{3.0*10^{8} }\)

=>    \(t =  847.7 \  s\)

Now converting to minutes

       \(t =  \frac{847.7}{60}\)

   =>     \(t =  14.129 \  minutes\)    

For a spacecraft is traveling with a velocity of Vox-5690 m/s:

To solve this problem, use the equations of motion to calculate the final velocity and the vertical component of the velocity. Assume that the initial velocity in the y-direction is zero.

Given:

Initial velocity in the x-direction (V₀ₓ) = -5690 m/s

Time of engine firing (t) = 865 s

Acceleration in the x-direction (ax) = 1.45 m/s²

Acceleration in the y-direction (ay) = -8.66 m/s²

(a) To calculate the final velocity (v), use the equation:

v = V₀ₓ + ax × t

Substituting the values:

v = -5690 m/s + 1.45 m/s² × 865 s

v = -5690 m/s + 1254.25 m/s

v ≈ 685.25 m/s

Therefore, the final velocity (v) is approximately 685.25 m/s.

(b) To calculate the vertical component of the velocity (vy), use the equation:

vy = ay × t

Substituting the values:

vy = -8.66 m/s² * 865 s

vy = -7484.9 m/s

Therefore, the vertical component of the velocity (vy) is -7484.9 m/s.

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Answer:

mechanical energy is being used

The voltage of the battery would be 20 volts. Option I.

According to Ohm's law, the voltage (V) across a resistor is equal to the current (I) flowing through it multiplied by its resistance (R). Mathematically,

V = I × R

In this case, the current (I) flowing through the resistor is given as 10 A and the resistance (R) of the resistor is given as 2 ohms. Substituting these values into the above formula, we get:

V = 10 A × 2 ohms = 20 volts

Therefore, the voltage of the battery is 20 volts.

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The cyclist's acceleration to the nearest tenth is: C. 2.7 \(m/s^2\).

Given the following data:

To find the cyclist's acceleration to the nearest tenth:

Acceleration is calculated by subtracting the initial velocity from the final velocity and dividing by the time.

Mathematically, acceleration is given by the formula;

\(A = \frac{V - U}{t}\)

Where:

Substituting the given parameters into the formula, we have;

\(A = \frac{12.5\; - \;0}{4.5} \\\\A = \frac{12.5}{4.5}\)

Acceleration, A = 2.7  \(m/s^2\)

Therefore, the cyclist's acceleration to the nearest tenth is 2.7 \(m/s^2\).

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Answer:

79.20 joule

Explanation:

1.

A 0.10kg stone is thrown from the edge of an ocean cliff with an initial speed of 21m/s. When it strikes the water below, it is traveling at 45m/s. What is the change in kinetic energy of the stone?

ΔEk = m/2*(V2^2-V1^2) = 0.05*(45^2-21^2) = 79.20 joule

The change in the kinetic energy of the stone is 81.25 J.

The given parameters;

The initial kinetic energy of the stone is calculated as follows;

K.E = ¹/₂mu²

K.E₁ = ¹/₂ x 0.1 x 20²

K.E₁ = 20 J

The final kinetic energy of the stone is calculated as follows;

K.E₂ = ¹/₂ x 0.1 x 45²

K.E₂ = 101.25 J

The change in the kinetic energy of the stone is calculated as follows;

ΔK.E = K.E₂ - K.E₁

ΔK.E = 101.25 J  -  20 J

ΔK.E = 81.25 J

Thus, the change in the kinetic energy of the stone is 81.25 J.

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Answer:

e.

Explanation:

       \(\Delta y = v_{o} * t - \frac{1}{2} *g*t^{2} (2)\)

        \(h =\frac{1}{2} *g*t^{2} (3)\)

Answer:

The 9th harmonic is 1,010.67 Hz.

Explanation:

Given;

length of the pipe, L = 1.23 m

speed of sound at 0°C = 331.5 m/s

A pipe closed at one end is known as a closed pipe;

The wavelength of the sound for the first harmonic is calculated as;

L = Node ------ > Antinode

\(L = \frac{\lambda }{4} \\\\\lambda = 4L\)

First harmonic:  \(F_0 = \frac{V}{\lambda} = \frac{V}{4L}\)

The wavelength of the sound for the first harmonic is calculated;

L = Node ----> Node + Node ------> Antinode

\(L = \frac{\lambda}{2} + \frac{\lambda}{4} = \frac{2\lambda+\lambda}{4} = \frac{3\lambda}{4} \\\\\lambda = \frac{4 L}{3}\)

Second harmonic: \(F_1 = \frac{V}{\lambda} = \frac{3V}{4L}\)

F₁ = 3F₀

The increment from F₀ to F₁ is 1 to 3; (odd number).

(1, 3, 5, 7, 9, 11, 13, 15, 17, 19..... n+2, where n is odd number)

The 9th harmonic = F₈

F₈ = 15F₀

\(F_8= 17(F_0) = 15 (\frac{V}{4L} )\\\\F_8 = 15(\frac{331.5}{4\times 1.23} )\\\\F_8 = 1,010.67 \ Hz\)

Therefore, the 9th harmonic is 1,010.67 Hz.

The frequency of the 9th harmonic if the pipe is closed at one end is 605.48 Hz.

Based on the given information,

• The length (l) of the shortest pipe given is 1.23 m.

The speed of sound at 0 degree C is,

\(V = 331\sqrt{1+\frac{T}{273} } \\V = 331\sqrt{1+\frac{0}{273} } \\V = 331 m/s\)

Now the condition is that the pipe is closed at one end. The formula to use in the given case is,

\(fn = \frac{nv}{4l} \\\)

Here l is the length of the organ pipe.

Now the frequency of the 9th harmonic will be,

\(f9 = \frac{9v}{4l} \\\\f9 = \frac{9*331}{4*1.23} \\f9 = 605.48 Hz\)

Thus, the frequency of the 9th harmonic if the pipe is closed at one end is 605.48 Hz.

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Answer:

D

Explanation:

The north field of a magnet is the positive side. Arrows pointing out of a side = positive

V= IR

160 = I × 2

80 A = I = current

Answer:

80 A

Explanation:

by ohm's law, resistance is equal to the change in voltage over the current so if we plug and solve for current we get I = (160V)/(2V/A)= 80 A

A photon is a tiny energy packet of electromagnetic radiation, also referred to as a light quantum.

1) Ultraviolet radiation is commonly used in sanitizing hospitals because, viruses, methicillin-resistant Staphylococcus aureus, and vancomycin-resistant enterococci are all susceptible to the germicidal effects of UV-C.

2) According to the photon theory, electrons that have been stimulated return to the ground state to create atomic emission spectra. Light or the photon is the energy that is released when electrons drop to a lower energy level.

3) To characterise the atomic characteristics of light, Albert Einstein used Planck's quantum theory.

Planck's hypothesis is supported by Einstein's demonstration that electromagnetic radiation, such as light, has both wave-like and particle-like properties.

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The frequency of light with a wavelength of 655 nm is\(4.57 x 10^14 Hz\) and 515 nm is \(5.82 x 10^14\) Hz and  475 nm is\(6.31 x 10^14 Hz\)

The equation that links the speed of light to wavelength and frequency is

c = λν

Where, c = speed of lightλ = wavelengthν = frequency c is a constant of 2.998 x 10^8 m/s.

Calculating the frequency of light with a wavelength of

655 nm:λ = 655 nm = \(6.55 x 10^-7m\)

Using the above equation, we get

c = λνν = c/λ = \((2.998 x 10^8 m/s)/(6.55 x 10^-7m)ν = 4.57 x 10^14 Hz\)

Therefore, the frequency of light with a wavelength of 655 nm is 4.57 x \(10^14 Hz.\)

Calculating the frequency of light with a wavelength of 515 nm:λ = 515 nm = \(5.15 x 10^-7m\)

Using the above equation, we get

c = λνν = c/λ =\((2.998 x 10^8 m/s)/(5.15 x 10^-7m)ν = 5.82 x 10^14 Hz\)

Therefore, the frequency of light with a wavelength of 515 nm is 5.82 x \(10^14 Hz\).

Calculating the frequency of light with a wavelength of 475 nm:λ = 475 nm = \(4.75 x 10^-7\)m Using the above equation, we get

c = λνν = c/λ = \((2.998 x 10^8 m/s)/(4.75 x 10^-7m)ν = 6.31 x 10^14 Hz\)

Therefore, the frequency of light with a wavelength of 475 nm is 6.31 x \(10^14 Hz.\)

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Answer:

To solve this problem, you'll need to break the initial velocity of the seed into its horizontal and vertical components, then use the equations of motion to find the time of flight and horizontal distance.

The initial velocity (v) of the seed is 2.65 m/s. The angle it's launched at (θ) is 30.0 degrees below the horizontal. The height (h) it's launched from is 0.460 m.

First, calculate the horizontal (v_x) and vertical (v_y) components of the velocity. Because the seed is launched downward, the vertical component will be negative:

v_x = v * cos(θ) = 2.65 m/s * cos(30.0) = 2.29 m/s

v_y = v * sin(θ) = -2.65 m/s * sin(30.0) = -1.325 m/s

Next, use the equation of motion to find the time it takes for the seed to hit the ground:

h = v_y * t + 0.5 * g * t^2

Where g is the acceleration due to gravity, which is approximately 9.8 m/s². Solving the equation for t gives:

t = (-v_y - sqrt((v_y)^2 - 4 * 0.5 * g * (-h))) / (2 * 0.5 * g)

Plugging in the values:

t = (1.325 + sqrt((-1.325)^2 - 4 * 0.5 * 9.8 * (-0.460))) / (2 * 0.5 * 9.8)

t = 0.182 seconds

Finally, use the horizontal velocity and time of flight to find the horizontal distance the seed covers:

x = v_x * t = 2.29 m/s * 0.182 s = 0.417 m

So, the seed lands after approximately 0.182 seconds and travels approximately 0.417 meters horizontally.

Answer:

104f

Explanation:

(40°C × 9/5) + 32 = 104°F

Answer:

I am sure it is A because no chemical change occurs and it is a physical change.  If you can Brainllest than that would be great but if you wanna you don't have to. Hope this helps!! If wrong sorry.

Explanation:

The efficiency of the leaf blow is 48%.

         Here, E = Energy transferred

                   m = Mass

                   Ф = Temperature change

            Here, E = Energy transferred

                      P = Power

                      t = time

        Here, v = speed

                   f = frequency

                  ∧ = wavelength

       Efficiency =  (Useful power out / Total power in ) = 360/750 = 0.48

So, the efficiency of the leaf blower is 48%.

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Answer:

b

Explanation:

This affect the weather.Because the moisture will condense into precipitation. Option D is correct.

Weather forecasting is the use of science and technology to forecast atmospheric conditions for a specific area and time.

People have sought to forecast the weather informally, and systematically since the nineteenth century.

The humidity is expected to reach 100% in the following several days, according to the weather.As a result of the moisture condensing into precipitation.

Hence,option D is correct.

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Answer:

 t = 8.98 10⁻⁷ m

Explanation:

This is an exercise in interference by reflection, let's analyze what happens on each surface of the film.

* When the light ray shifts from a medium with a lower refractive index to a medium with a higher refractive index, the reflected ray has a reflection of 180

* The beam when passing to the middle its wavelength changes

           λ = λ₀ / n

if we take this into account, the constructive interference equation for normal incidence is

            2t = (m + ½) λ₀ / n

let's apply this equation to our case

for λ₀ = 479 nm = 479 10⁻⁹ m

             t = (m + ½) 479 10⁻⁹ / 1.33

             (m + ½) = 1.33 t / 479 10⁻⁹

for λ₀ = 798 nm = 798 10⁻⁹ m

             t = (m' + ½) 798 10⁻⁹ /1.33

            (m' + ½) = 1.33 t / 798 10⁻⁹

as they tell us that no other constructive interference occurs between the two wavelengths, the order of interference must be consecutive, let's write the two equat⁻ions

               (m + ½) = 1.33 t / 479 10⁻⁹

             ((m-1) + ½) = 1.33 t / 798 10⁻⁹

             (m + ½) = 1.33 t / 798 10⁻⁹ +1

resolve

             1.33 t / 479 10⁻⁹ = 1.33 t / 798 10⁻⁹ +1

             1.33 t / 479 10⁻⁹ = (1.33t + 798 10⁻⁹) / 798 10⁻⁹

             1.33t = (1 .33t + 798 10⁻⁹) 479/798

             1.33t = (1 .33t + 798 10⁻⁹) 0.6

             1.33 t = 0.7983 t + 477.6 10⁻⁹

             t (1.33 - 0.7983) = 477.6 10⁻⁹

             t = 477.6 10⁻⁹ /0.5315

             t = 8.98 10⁻⁷ m

3.7996 seconds are needed to accelerate it.

acceleration is the rate of change in both speed and direction of velocity over time. When anything moves faster or slower in a straight line, it is said to have been accelerated. Because the direction is always shifting, motion on a circle accelerates even while the speed is constant.

So we have u= 0m/s, v=15m/s, s= 200m

So,2as= v^2-u^2

A= V^2 - U^2/2s

= 225/400

=0.5625 m/s^2

V=u + a*(t^2)

15=0+0.5625(t^2)

15-0.5625= t^2

=14.4375=t^2

root14.4375= root(t)

Time= 3.7996 seconds

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Answer:

0.3 newtons

Explanation:

If the coefficient of kinetic friction between a crate and the floor is 0.20, then the fore needed to slide a 92 kg crate uniformly across the floor would be 180.504 N

Friction is a type of force that resists or prevents the relative motion of two physical objects when their surfaces come in contact.

The friction force prevents any two surfaces of objects from easily sliding over each other or slipping across one another. It depends upon the force applied to the object.

As given in the problem If the coefficient of kinetic friction between a crate and the floor is 0.20

The force needed = μN

where μ is the coefficient of the kinetic friction

μ =0.2

N is the normal force

N = mg

N = 92×9.81 N

Force needed to slide = 0.20× 92×9.81

                                     =180.504 N

Thus, The force needed to slide a 92 kg crate uniformly across the floor would be 180.504 N

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Answer:

From the power source we have to buy only energy.

Explanation:

Energy is released when an electron loses potential energy as a result of the transfer from higher state to lower state.

Electricity is the movement of electrons between atoms and it doesn't means we can isolate the electrons from the atom and sell it. It remains the part of atom and hence only energy can be purchase form the power company.

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Answer:

Explanation:

To find the mass of an object given it's acceleration and the force acting on it we use the formula

\(mass = \frac{force}{acceleration} \\ \)

From the question

force = 500 N

acceleration = 5.0 m/s²

We have

\(mass = \frac{500}{5} \\ \)

We have the final answer as

Hope this helps you

The correct answer is D. 2200 Hz

Explanation:

The frequency of a wave is measured in hertz (Hz) and refers to how often a wave passes through a point during a specific time. This factor can be calculated if you divide the velocity of the wave by the wavelength (distance between crests) this means f (frequency) = v (velocity) / λ (wavelength).

f (frequency) =  242 m/s (velocity) / 0.11 (wavelegth)

f = 2200 Hz

According to this, the frequency of the wave, in this case, is 2200 Hz

Answer:

All planets including the outer larger planets were formed at the same time somewhere around 4.5 Billion years ago.

Explanation:

the young sun drove away most of the gas from the inner solar system, leaving behind the rocky cores also known as the terrestrial planets.

The scale will register less than 190N if the aluminum is hanging in fresh water. The weight of the piece of aluminum is reduced as it is submerged in water due to the buoyant force that opposes the force of gravity, so the scale's reading will be less than 190N.

When a piece of aluminum is attached to a string that is fastened to a hanging scale, the scale will show 190N when the aluminum is hanging in the air. The hanging aluminum has a weight of 190N because the force of gravity acts on it. The buoyant force of water, on the other hand, opposes the force of gravity on an object immersed in it.

The buoyant force is equal to the weight of the water displaced by the aluminum's volume. Therefore, the aluminum's weight decreases when it is submerged in water. The scale will read less than 190N because it is determined by the sum of the force of gravity and the buoyant force. Since the buoyant force counteracts the force of gravity, the scale's reading is less than when the aluminum is hanging in air. The scale's reading is determined by the aluminum's weight plus the buoyant force in water.

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a) It is the error present in the measuring instrument that causes it to register a value even when there is no input or output being measured.

b) An example of when you would have to allow for zero error is when using a measuring instrument like a vernier caliper or micrometer screw gauge.

a) Zero error refers to the deviation or discrepancy in the measurement instrument, where the indication or reading on the instrument is not zero when the quantity being measured is zero. In other words, it is the error present in the measuring instrument that causes it to register a value even when there is no input or output being measured.

Zero error can occur due to various reasons such as manufacturing defects, wear and tear, misalignment, or improper calibration of the instrument. It can be positive or negative, depending on whether the instrument reads higher or lower than the actual value.

b) An example of when you would have to allow for zero error is when using a measuring instrument like a vernier caliper or micrometer screw gauge. These instruments are commonly used to measure the dimensions of objects with high precision.

In a vernier caliper, for instance, zero error can occur when the jaws do not close perfectly when there is no object being measured. If the caliper shows a reading other than zero when the jaws are closed, it indicates the presence of zero error.

To obtain accurate measurements, the zero error needs to be accounted for and compensated. This can be done by adjusting the position of the zero on the scale or by subtracting the zero error value from the measured readings.

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