Answer:
470 J/Kg.K
Explanation:
Let c be the specific heat capacity of metal.
According to the principle of caloriemetry
Heat lost by the hot body = Heat gained by the cold body
Heat lost by the aluminium = Heat gained by metal + calorimeter
mass of Aluminium x specific heat of Aluminium x rise in temperature + mass of water x specific heat of water x rise in temperature = mass of metal x specific heat of metal x fall in temperature
0.09 x 910 x (32 - 20) + 0.390 x 4190 x (32 - 20) = 0.16 x c x (305 - 32)
982.8 + 19609.2 = 43.68 c
c = 471.4 J/Kg.K
c = 470 J/Kg.K (nearly)
What is voltage actually? Need an informal and non academic term explanation........TIA
A baseball has a mass of 145 g A bat exerts a force of 18400 N on the ball what is the acceleration of the ball
If the concentration of sn2+ in the cathode compartment is 1.50 m and the cell generates an emf of 0.24 v , what is the concentration of pb2+ in the anode compartment?
Answer:
4.8*10^-8M
Explanation:
To determine the concentration of Pb2+ in the anode compartment, we can use the Nernst equation. By rearranging the Nernst equation and plugging in the given values, we can calculate the concentration of Pb2+ in the anode compartment.
Explanation:To determine the concentration of Pb2+ in the anode compartment, we need to use the Nernst equation. The Nernst equation relates the cell potential to the concentration of ions in each compartment of the cell. It is given by: Ecell = E°cell - (0.0592/n) × log([Pb2+]/[Sn2+]), where Ecell is the cell potential, E°cell is the standard cell potential, [Pb2+] is the concentration of Pb2+ in the anode compartment, [Sn2+] is the concentration of Sn2+ in the cathode compartment, and n is the number of electrons transferred in the balanced redox reaction.
In this case, the cell potential is 0.24 V, [Sn2+] is 1.50 M, and n is 2 (since it is a Sn2+/Pb2+ redox reaction). Therefore, the equation becomes: 0.24 = E°cell - (0.0592/2) × log([Pb2+]/1.50). We can rearrange this equation to solve for [Pb2+]: [Pb2+] = (10^((E°cell - 0.24) × 2 / 0.0592)) × 1.50.
a cheetah can run from 0 to 70 mph in 2.2 seconds. what is the cheetah's acceleration in m/s?
The acceleration of a cheetah that can increase its speed from 0 to 70 mph in 2.2 seconds is 14.224 m/s² after converting the velocity into meters per second.
Explanation:To calculate the acceleration of a cheetah that can go from 0 to 70 mph in 2.2 seconds, we first need to convert the speed from miles per hour (mph) to meters per second (m/s). The conversion factor is 1 mph = 0.44704 m/s. So, 70 mph is equivalent to 70 × 0.44704 m/s, which equals 31.2928 m/s. According to the formula for acceleration (a), which is the change in velocity (Δv) divided by the time (Δt), the cheetah's acceleration would be:
a = Δv / Δt = (31.2928 m/s - 0 m/s) / 2.2 s = 14.224 m/s²
Therefore, the cheetah's acceleration is 14.224 m/s².
99 POINTS!!!
Why do people on Earth see only one side of the Moon when the Moon is visible in the sky?
A. The Moon does not rotate.
B. The Moon does not revolve.
C. The Moon and Earth rotate at the same rate.
D. The Moon rotates and revolves at the same rate.
Hello!
I believe the answer is C) The Moon and Earth rotate at the same rate. The moon and the earth rotate at the same rate. Meaning that the moon orbits the earth in 27.322 days. It also takes approximately 27 days for the moon to rotate once on its axis. So as a result, the moon does not seem to be spinning, but appears to observers from Earth to be keeping almost perfectly still.
I hope it helps!
If environmental triggers cannot be avoided or modified, they may make it difficult to extinguish a behavior.
Answer:
true
Explanation:
In the formulas for latent heat of fusion and latent heat of vaporization, what does Q represent?
Final answer:
Q represents the amount of heat energy required for phase change in the context of latent heat equations. It is calculated using mass and the substance-specific latent heat constants for fusion and vaporization.
Explanation:
In the context of the latent heat formulas, Q represents the heat required to change the phase of a substance. Specifically, for the latent heat of fusion, Q = mLf where Lf is the latent heat of fusion, the constant that denotes the amount of heat energy required to change 1 kilogram of the substance from a solid to a liquid without changing its temperature. For the latent heat of vaporization, Q = mLv where Lv is the latent heat of vaporization, indicating the amount of heat energy needed to change 1 kilogram of the substance from a liquid to a gas. The values of Lf and Lv are determined experimentally for different materials. For instance, for water, Lf is 334 kJ/kg, thus Q for turning 1 kilogram of ice at 0°C into water is Q = 3.34 × 105 J. The latent heat of vaporization for water is Lv = 2256 kJ/kg, meaning the energy required to vaporize mass m of water is Qv = mLv.
An opera singer sings a note that breaks a glass. This is an example of _____. consonance dissonance resonance reflection
The Answer is
C. Resonance
LOL EZ CLAP
In object moving at 30 M/S takes five seconds to come to a stop what is the objects acceleration
Strictly speaking, will a penny be slightly more massive if it has a negative charge or a positive charge? discuss.
Which statement best compares conduction, convection, and radiation?
Convection and radiation transfer thermal energy through matter only, and conduction transfers thermal energy through both matter and empty space.
Radiation and conduction transfer thermal energy through matter only, and convection transfers thermal energy through both matter and empty space.
Convection and conduction transfer thermal energy through matter only, and radiation transfers thermal energy through both matter and empty space.
Conduction, convection, and radiation transfer thermal energy through both matter and empty space.
In conduction mode of heat transfer energy is transferred through medium molecules by their vibration about their own position. SO here medium particles remain at their own position while energy is transferred from one point to other
In convection mode of heat transfer the heat is carried by the medium molecules from one place to other. So here medium moles itself transfer with the energy.
In radiation mode heat energy is transferred through electromagnetic waves so there is no medium required for this.
So correct answer is
Convection and conduction transfer thermal energy through matter only, and radiation transfers thermal energy through both matter and empty space.
Convection and conduction transfer thermal energy through matter only, and radiation transfers thermal energy through both matter and empty space.
which reaction is a single replacement reaction??
A. 2H2+O2-2H20
B. 2H202-2H20+O2
C. KOH+HCI+H2O
D. Cu+ 2AgNO3- 2Ag +Cu(NO3)2
True or false canvassing is an approach used to justify leads!!!hurry
If a cell phone is dropped from a very tall building, how far has the phone fallen after 2.7 seconds, neglecting air resistance?
The phone has fallen approximately 36.621 meters after 2.7 seconds.
Explanation:In order to determine how far the phone has fallen after 2.7 seconds, we can use the equation of motion: s = ut + (1/2)at², where s is the distance, u is the initial velocity, t is the time, and a is the acceleration. Since the phone is dropped from rest, its initial velocity is 0 m/s. Neglecting air resistance, the only force acting on the phone is gravity, which accelerates it at a rate of 9.8 m/s². Plugging in the values, we get:
s = (0)(2.7) + (1/2)(9.8)(2.7)²
s = 36.621 m
Therefore, the phone has fallen approximately 36.621 meters after 2.7 seconds.
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When you drive along the right-rear side of another vehicle, you are ______________?
When you drive along the right-rear side of another vehicle, you are in one of the driver's blind spots and in danger of a collision.
what is driving?Driving is the controlled operation and movement of a vehicle, including cars, motorcycles, trucks, buses, and bicycles.
The most critical thing to do before you pass another vehicle is check to the right side. It is also very important never to drive faster than the the speed limit, or at a speed that is unsafe for the current traffic,
weather or road condition in order to pass other vehicles. The law requires you to only pass other vehicles on the left (using the left lane). This is why you should check the right side.
Hence when you drive along the right-rear side of another vehicle, you are in one of the driver's blind spots and in danger of a collision.
To know more about driving follow
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A beaker containing mercury is placed inside a vacuum chamber in a laboratory. the pressure at the bottom of the beaker is 26000 pa. what is the height of the mercury in the beaker? the acceleration of gravity is 9.81 m/s 2 .
The diagram shows the layers of the Sun. Which labels correctly identify the layers most closely associated with gamma rays and visible light?
Z: Gamma rays
X: Visible light
X: Gamma rays
Z: Visible light
Z: Gamma rays
Y: Visible light
Y: Gamma rays
Z: Visible light
Answer:
Z: Gamma rays
X: Visible light
Explanation:
A close look at the diagram attach shows the core of the sun and then the external surface.
Gamma rays are intricately associated with the nuclear reactions that go on in the core of the sun that makes it to produce light. Hence Z must refer to gamma rays emitted in these nuclear processes at the core of the sun.
Visible light is given out by the sun and seen externally. Hence X is visible light.
A 30w light bulb uses 600J of electrical energy in a certain period of time. In that time , it produces 450 J of light energy. The rest of the energy is wasted calculate the efficiency of the light bulb
The efficiency of the light bulb is 75%.
Calculating The Efficiency Of A Light Bulb.
To calculate the efficiency of the light bulb, you can use the following formula:
Efficiency (%) = (Useful Energy Output / Total Energy Input) * 100
In this case:
- Useful Energy Output is the light energy produced, which is 450 J.
- Total Energy Input is the electrical energy used, which is 600 J.
Efficiency (%) = (450 J / 600 J) * 100 = (3/4) * 100 = 75%
So the efficiency of the light bulb is 75%. This means that 75% of the electrical energy input is converted into useful light energy, while 25% is wasted as other forms of energy, such as heat.
Learn more about Efficiency:
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How would your kidneys likely respond to the ingestion of too much soda (such as Pepsi)?
Answer:
This would increase the formation of the NH3 buffer.
Explanation:
This would increase the formation of the NH3 buffer. Since Pepsi has acid in it, it would cause the kidneys to reabsorb bicarbonate from the urine leading to an increase in the formation of the NH3 buffer.
What is not a similarity between symbolic and analogical representations
Answer:
(1) Physical characteristics different.
(2) Difference in direct relation of mental picture with the real object.
Explanation:
There are the points which describe the non similarities between symbolic and analogical representation:
Analogical representation is the representation that can share some of its physical characteristics with an object whereas symbolic representation is the representation which does not corresponds to physical characteristics of an object.In analogical representation, mental picture have direct relation to the actual object whereas in symbolic representation, mental picture does not have direct relation with an object.When two pulses meet up with each other while moving through the same medium, they have a tendency to bounce off each other and return back to their origin?
An experiment yielded the above temperature and time information. what is the freezing point of the material in this experiment if the material is a solid at time zero?
1.) The radio wave from a station broadcasting at 1.3×10^6 Hz has a wavelength of 230 m. What is the wave's speed?
2.) A wave has a frequency of 575 Hz. What is its period?
3.) A humming bird feeder is tied by a rope to a tree branch. You notice that in a gentle breeze, the feeder moves back and forth 15 times in 1 minute. How long is the rope?
An object is attached to a vertical spring and bobs up and down between points a and
b. where is the object located when its kinetic energy is a minimum?
The sound emitted by bats has a wavelength of 3.7 mm. what is the sound's frequency in air?
What happens to the efficiency of a ramp if friction is reduced?
Using what you know about newton's second law explain why a car with a lager mass use more fuel than a car with a smalle mass. assume both car dreive the same distance
What is the difference between AM radio waves and FM radio waves?
A-AM waves travel short distances along the Earth’s surface; FM waves travel farther.
B-An AM wave varies in amplitude; an FM wave varies in frequency.
C-FM waves are better reflected by particles in the Earth’s atmosphere.
D-An FM wave varies in amplitude; an AM wave varies in frequency.
What is the approximate range of wavelengths for visible light?
How do cranial nerves transmit information to the senses?
Answer:
They transmit directly between the brain and the sense organs.
Explanation:
Cranial nerves – Nerves that emerge directly from the brain and transmit information directly between the brain and various organs and muscles