Answer:
Heat transfer through radiation takes place in the form of electromagnetic waves, mainly in the infrared region. The radiation is emitted by some body as a consequence of the thermal agitation of its composing molecules.
Explanation:
The transfer of heat by radiation involves the carrying of energy from an origin to the space surrounding it. The energy is carried by electromagnetic waves and does not involve the movement or the interaction of matter.
Answer:
depressions of ozyan leyar
9) How much kinetic energy does a person have riding a bike is going 12 m/s? Let's assume that the
bike and person have a mass of 70kg.
A)
B)
C)
Kinetic Energy = [tex]\frac{1}{2} m*v^2[/tex]
m: mass -->70 kgv: velocity --> 12 m/sKinetic energy = [tex]\frac{1}{2}*70*(12^{2} ) = 5040[/tex] Joules
Hope that helps!
Based on the chemical equation provided, use the drop-down menu to choose the coefficients that will balance the chemical equation.
( )H2 + ( )O2 → ( )H2O
Answer:
2h2+2o→2h2o is the answer
Answer:
2
1
2
Explanation:
A sound wave has a frequency of 695 Hz in air
and a wavelength of 0.49 m.
What is the temperature of the air?
Relate the speed of sound in air to temperature in units of Kelvin, but answer in units
of Celsius.
Assume the velocity of sound at 0 ◦C is
332 m/s.
Answer in units of degC
This question involves the concepts of the speed of sound, frequency, and temperature.
The temperature of the air is "14.24 °C".
Temperature of AirFirst, we find the speed of sound at the given temperature:
v = fλ
where,
v = speed of sound = ?f = frequency = 695 Hzλ = wavelength = 0.49 mTherefore,
v = (695 Hz)(0.49 m)
v = 340.55 m/s
Now, the relationship between the speed of sound and temperature can be given by the following formula:
[tex]\frac{v}{v_o} = \sqrt{\frac{T}{273\ k}}\\\\T = (273\ k)(\frac{v}{v_o})^2\\\\[/tex]
where,
T = Temperature = ?v = speed of sound in air at given temperature = 340.55 m/sv₀ = speed of sound in air at 0°C = 332 m/sTherefore,
[tex]T = (273\ k)(\frac{340.55\ m/s}{332\ m/s})^2[/tex]
T = 287.24 k = (278.24 k -273) °C
T = 14.24 °C
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When do astronomers now think that the ""dark energy"" began to accelerate the expansion of the universe?.
Answer:
Cosmologists estimate that the acceleration began roughly 5 billion years ago. Before that, it is thought that the expansion was decelerating, due to the attractive influence of matter. The density of dark matter in an expanding universe decreases more quickly than dark energy, and eventually the dark energy dominates.
Explanation:
Pls, choose me as brainliest!
Answer:
1988
Explanation:
Dark energy was discovered in 1998 with this method by two international teams that included American astronomers Adam Riess and Saul Perlmutter and Australian astronomer Brian Schmidt.
shape of houses built in areas with hot climate and materials used
Answer:
Cement and sand will do
Explanation:
because without it you can't build
Answer:
Shape of houses built in areas with hot climate
Compact house forms, rather than sprawling, multi-wing designs work best in hot locales. Home designs with shaded porches, wrap around porches or plans with courtyards that create a shaded open area within the building are ideal.
How do you build a house in hot climates?
Place courtyards centrally to enhance cooling and ventilation. ...
Choose the right materials. ...
Use waterbodies and landscaping effectively. ...
Shade terraces and outdoor spaces. ...
Create sheltered, barrier-free spaces for air circulation. ...
Extend roofs to protect the walls and windows from direct heat.
Materials used building in areas with hot climate
The most common materials used for building walls in the warm-humid regions are stones, and earth-based bricks.
Concrete, bricks, and tile have a high thermal mass due to the large amount of heat energy needed to change their temperatures. This makes concrete an ideal building material for climates that are hot during the day but cooler at night.
An elongated drop of blood was found with a width of 4.33 mm and a length of 5.0
mm. At what angle did the blood drop hit the surface?
0°
30°
60°
90°
SinФ = w/l
SinФ = 4.33 / 5.0
Ф = arcsin 4.33/5.0
Ф = 59.99 degrees
Round to 60 degrees
A police officer on a mountain bike is cruising at a speed of 3.50m/s, when he sees a wanted
criminal, standing on a corner, 75m ahead of him. If the police officer accelerates at a rate of
2.00m/s^2, how much time will he take to reach the corner?
Answer:
7 seconds
Explanation:
please see paper!
vf² = vo²+2ad
vf=vo+at
vf²=3.5²+2.2.75
vf²=312.25
vf=17.67 m/s
vf=vo+at
17.67 = 3.5 +2t
t=7.085 s
what is the difference between serious and parallel circuit
An airplane propeller rotates with an angular speed of 260rad/s. Through what angle does the propeller rotate in 5.0s? Give your answer in both radians and degrees
Answer:
I hope this will help......
At 40 degrees is 25g of NaNO3 saturated or unsaturated?
I think unsaturated
because -
At 55°C, a saturated solution would contain 120 g of solute, NaNO3. (Notice, this point is exactly on the solute's curve). If, for example we mixed in 140 g of NaNO3 instead of 110 g of solute at 55°C, we would create a SUPER saturated solution, because we would be at a point ABOVE the solute's solubility curve.
Consider a resistor (R=1000 kΩ) and a capacitor (C=1μF) connected in series. This configuration is connected in series to a battery with an emf of 10 V.
After the capacitor is charged to its maximum value, the capacitor and resistor are disconnected from the battery and from each other. Then they are connected in parallel, so that the capacitor discharges through the resistor. How long will it take for the voltage across the capacitor to drop to 2.50 V?
Answer:
The maximum pressure is 10 V from across condenser.The highest charge mostly on condenser.
Vc = 10 x 1mf
= 10 ^ - 5C
The time it takes for the condenser to be 5 V different.
Thus we have, 0.69 x 10 ^ - 3 seconds.
Which of the following is not an example of an electromagnetic wave.
A. microwaves
B. sonar
C. visible light
D. ultraviolet
Answer:
microwaves
Explanation:
Among the following, the wave which is not an example of the electromagnetic wave is water wave. Thus, the correct option is B. Explanation: Electromagnetic waves are produced as a result of the vibrations between the electric and magnetic fields. Examples of electromagnetic waves are X-ray, lightwave, radio wave, microwave, etc.
An arch carries the thrust of weight to its _____(1)______. With a _____(2)______, the horizontal part of the structure supports all the weight above it. A. (1) center; (2) post-and-bearing b. (1) base; (2) springing line c. (1) keystone; (2) groin vault d. (1) sides; (2) post-and-lintel Please select the best answer from the choices provided A B C D.
Option D is correct. An arch carries the thrust of weight to its sides with a post-and-lintel.
What is an arch?
An arch is indeed a vertical curving construction that covers an elevated space that may or may not sustain the load above it or the pressure gradient against it
In the case of a horizontally arched, such as an embankment dam. While arches and vaults are often confused, A vault is defined as an ongoing arch forming a roof.
Option D satisfies the fill-in blanks option.
Hence option D is correct. An arch carries the thrust of weight to its sides with a post-and-lintel.
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What is the main difference between cardio and strength-training activities? A. Cardio activities increase your physical strength, while strength-training activities work your heart and lungs. B. Cardio activities work your heart and lungs, while strength-training activities strengthen your muscles. C. Cardio activities require short bursts of energy, while strength-training activities strengthen your body over long durations. D. Cardio activities improve your joints' range of motion, while strength-training activities work your heart and lungs.
Answer:
B: Cardio is really to improve your circulatory and etc while strength that's common sense
Explanation:
Answer:
B
Explanation:
A 60w bulb has a higher resistance than a 100w bulb, since the power rating is given assuming that the bulb is connected to a 120v source by itself. If you connect a 60w bulb and a 100w bulb in series to an outlet, which will shine brighter?.
Voltage drop across any components in series is proportional to its resistance. 60W bulb has higher resistance than 100W bulb if both the bulbs were rated for same voltage. So higher voltage drop will be across a 60W bulb.
In parallel voltage drops will be same across both the bulbs but current through it will be inversely proportional to the resistance. So 100W bulb draws more current than 60W bulbs.
60W dissipates more energy than 100W bulbs when in series and 100W bulbs dissipates more energy when in parallel.
What is the best definition of profit?
Answer:
Excess currency after a series of deals or fees.
Explanation:
Let's put profit in perspective by using an example. For example, let's say you spend 72 dollars to build a certain product, then you sell that same product to your friend for 116 dollars. It costed 72 dollars to build that product and you sold it for 116, after subtracting the costs for building the product the excess currency is what you would call profit. Profit is your overall goal when running a business, you want to sell a product and make profit from it.
Hope this helps.
profit is your gain on any problem,situation or opportunity given to you
What happens to the air in an air pump when being pumped into a tire? What happens to the air when allowed to escape from a tire?
Does everything in a black hole contain a singularity?
Answer:
All black holes contain singularities, however not all singularities involve black holes. A neutron star may be dense, matter the size of a pinhead can weigh as much as the earth, but there seems to be a mathematical cut-off point beyond which a black hole is formed.
differentiate between loadstone and bar magnet
Answer:
Explanation:
Permanent (Bar) Magnet. —-) Electromagnet
They are permanently magnetized. —-) These are temporarily magnetized.
A Force of 940N does a Work of 3760 Joule in displacing a given object. Find the displacement.
Question :-
A Force of 940 N does a Work of 3760 J in Displacing a given object . Find the Displacement .Answer :-
Displacement is 4 meter .[tex] \rule {180pt} {2pt} [/tex]
Given :-
Force = 940 NewtonWork = 3760 JouleTo Find :-
Displacement = ?Solution :-
As per the provided information in the given question, Force is given 940 Newton . Work is given 3760 Joule . And, we have been asked to calculate the Displacement .
For calculating the Displacement , we will use the Formula :-
Displacement = Work / ForceTherefore , by Substituting the given values in the above Formula :-
⇒ Displacement = Work / Force
⇒ Displacement = 3769 / 940
⇒ Displacement = 4
Hence :-
Displacement = 4 meter .[tex] \underline {\rule {180pt} {4pt}} [/tex]
Water flowing from a waterfall before it hits the pond below?
Answer:
Kinetic Energy
Explanation:
Ang prinsipyo ay nagsasaad na ang enerhiya ay hindi maaaring malikha o masira, ngunit maaari lamang ma-convert mula sa isang anyo patungo sa isa pa. Ang tubig sa tuktok ng napakataas na talon ay nagtataglay ng gravitational potential energy. Habang bumabagsak ang tubig, ang enerhiya na ito ay na-convert sa kinetic energy, na nagreresulta sa isang daloy sa isang mataas na bilis.
waves that move through matter are only called ______________ waves
Refer to the following series circuit: + R R, = 17.2 V R, = 52 1:11 V = 15V R, 1 I Calculate the total power developed in the circuit. P= Choose... watts Choose... 15 120 98 Submit Answer Skip C Notes
Series connection
R=R1+R2=10+5=15[tex]\Omega[/tex]V=15VNow
[tex]\\ \rm\Rrightarrow P=\dfrac{V^2}{R}[/tex]
[tex]\\ \rm\Rrightarrow P=\dfrac{15^2}{15}[/tex]
[tex]\\ \rm\Rrightarrow P=15W[/tex]
Which of the following is NOT an example of good static flexibility?
A.
doing and holding a split
B.
running a mile in six minutes
C.
holding a ballet position for six minutes
D.
crossing your ankles behind your head
Answer:
running a mile in six minutes
Explanation:
Answer:
Not example is B: Running a mile in six minutes
can someone please answer this ill give you brainliest and your getting 100 points.
Answer: i think its b
Explanation:
Answer:
All of the above
Explanation:
Extraction of fuel will affect fuel price so there will be social and economic costs. Extraction from the environment will have environment cost. It is also a political decision with political cost.
So the answer is all of the above.
A bus wheel has a diameter of 0.80 m and an angular velocity of 20 rad/s. What is the linear velocity of the wheel?
The linear velocity of the wheel is 16 m/s.
What is linear velocity?Linear velocity is the rate of change of displacement with regard to time when the object is moving in a straight line
To calculate the linear velocity of the wheel, we use the formula below.
Formula:
v = ωr............. Equation 1Where:
v = Linear velocityω = Angular velocityr = Radius of the wheel.From the question,
Given:
ω = 20 rad/sr = 0.80 mSubstitute these values into equation 1
v = 20(0.8)v = 16 m/s.Hence, The linear velocity of the wheel is 16 m/s.
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Based on fossil evidence, about how long ago did the
first single-celled life form appear on Earth?O 130 million years ago
O 1.5 billion years ago
O
2.5 billion years ago
O
4.1 billion years ago
Answer:
4.1 billion
Explanation:
Explain that sound is a longitudinal wave that has a frequency, wavelength, and speed.
During what moon phase is a lunar eclipse possible.
Two bulldozers are pushing on a large tree trunk as shown. (last photo)
Click on the diagram until it correctly represents the expected movement and force.
The tree will fall in the south eastern side of the area due to two bulldozer.
Direction of tree fallingThe tree falls in the sloppy direction due to both bulldozer which apply force from two directions. One bulldozer apply force on the tree from western side whereas the other bulldozer apply force on the tree from north side so that's why we can say that the tree will fall in the south eastern side of the area.
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Answer:
Maybe it; the 4th image
Explanation:
The upper bulldozer have more force than the lower bulldozer. Therefore making the down force longer than the right force