Answer:
Water temperatures are slow to heat up, It takes 4 times the energy to heat up water than to heat air. Water also "feels" colder because water is a more efficent medium than air to cool our body down.
Re word it tho
Hope this helps!!
A block of copper with mass 0.500 kg is heated to 400. degrees Celsius from 290. degrees Celsius. The specific heat capacity of copper is 387 J/ (kg*C°). The heat absorbed by the copper block is
7.74 E5 J
7.74 E4 J
5.61 E4 J
2.13 E5 J
2.13 E4 J
The heat absorbed can be calculated using calorimetric equation. The heat absorbed by the copper block of mass 0.500 kg for the temperature difference of 290 to 400 degree Celsius is 2.13 E4 J.
What is calorimetric equation?Calorimetry is an analytical tool used to determine the heat energy absorbed or released by a system. The calorimetric equation connecting the mass m, temperature difference ΔT and specific heat capacity c is given by:
q = m c ΔT .
Given,
m = 0.500 kg
c = 387 J/(kg °C )
ΔT = 400 - 290 °C = 110°C.
Then, the heat energy absorbed by the copper block is ;
q = 0.50 kg × 387 J/(kg °C ) × 110°C
= 2.13 E4 J
Therefore, option E is correct.
Find more on calorimetry:
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Which pair of quantities can be expressed using the same units?
1.) impulse and potential energy
2.) power and momentum
3.) work and kinetic energy
4.) acceleration and weight
Answer:
it 3
Explanation:
for sure
works si unit is joule
and
kinetic energy si unit is also joule
PLS HELP!
How will the electrostatic force be changed if the distance between two electric charges is tripled?
A)9 times the original force B)1/3 of the original force C)1/9 of the original force D)3 times the original force
Answer:
The correct option is (c).
Explanation:
The electrostatic force between charges is given by :
[tex]F=k\dfrac{q_1q_2}{r^2}[/tex]
Where
r is the distance between charges
If the distance between two electric charges is tripled, r' =3r
New force becomes,
[tex]F'=k\dfrac{q_1q_2}{(3r)^2}\\\\F'=k\dfrac{q_1q_2}{9r^2}\\\\F'=\dfrac{1}{9}\times k\dfrac{q_1q_2}{r^2}\\\\F'=\dfrac{F}{9}[/tex]
So, the new force becomes 1/9 of the original force. The correct option is (c).
name and discuss five good reasons why a crop can distribute well in a new areas of environment
Answer:
The description as per the given scenario is described below throughout the segment.
Explanation:
Plant development relies mostly on the earth's weather conditions as well as the quantity of sunshine it gets.The key elements influencing farming operations include temperature, natural vegetation as well as landforms.The smart utilization of genetic variation for the development of better plants could make an important contribution to environmental protection.Crop diversification includes verifying that appropriate amounts of food are provided not just steady as well as sustained.Species of crops resistant to parasites adverse conditions could decrease this need for dangerous chemicals.You push a heavy crate. At first it doesn't move. You push harder, and it finally starts to move, but you still have to exert some force to keep it moving at a constant velocity. Explain.
Answer:
Explained below.
Explanation:
Newton's first law of motion states that an object will continue in its present state of rest or continue with constant speed in a straight line except it is acted upon by an external force.
For every object in motion or at rest there is a force of friction that tries to resist its motion or prevent it from moving with constant velocity.
Now, to push it from rest you will need to apply a force large enough to overcome its static friction. Now, after that initial motion, smaller forces will have to be applied to overcome what is called sliding friction that prevents the crate from sliding which will affect the constant velocity.
an object of mass 20kg is lifted to a 25m building. how much potential energy is stored on a mass?(take g=10m/s²)
Answer:
5000J
Explanation:
hope this helps you
The particles of a gas are packed tightly together.
Answer:
False
Explanation:
Answer:
False, they are much loose than any of the other states of matter
The velocity-time graph shows the motion of a truck. Find (i) its velocity , (ii) its acceleration and (iii) the distance covered by the cyclist in 15 seconds
no spam please and answer fast!
Answer:
(iii) 300m
Explanation:
(i) The velocity of the cyclist is constant with time, the rate of the change of the velocity with the time is zero. So the acceleration of the object will be zero.
(ii) According to the graph we observe that the cyclist is moving with the same velocity all the time, therefore, the velocity of the cyclist is [tex]20m/s^{-1}[/tex]
(iii) Apply the formula: (speed = velocity x time)
s = vt
s = [tex]20m/s^{-1}[/tex] x 15s
s = 300m
Hope this helps :)
A proton traveling at a speed of 3.5x10 ^-6 m/s passes perpendicular to a uniform magnetic field of 4.2x10 ^-2 T. What is magnitude of the force on the proton while the proton is in the magnetic field?
Answer:
i think its 50
Explanation:
0.125 C of charge flow out of a
5.00 V battery in 6.30 s. How
much resistance is attached to the
battery?
(Hint: What is the definition of current?)
(Unit = Ohm)
Answer:
Resistance = 252.53 Ohms
Explanation:
Given the following data;
Charge = 0.125 C
Voltage = 5 V
Time = 6.3 seconds
To find the resistance;
First of all, we would determine the current flowing through the battery;
Quantity of charge, Q = current * time
0.125 = current * 6.3
Current = 0.125/6.3
Current = 0.0198 A
Next, we find the resistance;
Resistance = voltage/current
Resistance = 5/0.0198
Resistance = 252.53 Ohms
What distance did the boulder with a force of 24 Newtons travel if 240 joules of work was done on it?
d = 10 m
Explanation:
Work = force × distance
or
distance = work/force
= (240 J)/(24 N)
= 10 m
what is mechanics inbranches of physics
Answer:
Mechanics: A branch of physics in which we study about the object and properties of an object in form of a motion under the action of the force.
An infrared beam of light as a wavelength of 7.7 mm What is this energy
Answer:
E=2.58155844×10^-29
Explanation:
we use this formula
E= hc/ lambda
E= [(6.626×10^-34)( 3×10^8)]/(7.7×10^-3)
E=2.58155844×10^-29
Is water still part of the cycle when it is underground? Explain.
Answer:
hi
Explanation:
A geostationary satellite orbits the Earth in 24 hours along an orbital path that is parallel to an imaginary plane drawn through the Earth's equator. Such a satellite appears permanently fixed above the same location on the Earth. How high above the Earth's surface must it be located?
Answer:
approximately 35,786 km
Explanation:
A satellite in such an orbit is at an altitude of approximately 35,786 km (22,236 mi) above mean sea level. It maintains the same position relative to the Earth's surface.
what did you learn from organize Notes, write 2 to 3 paragraphs explaining how that process is designed to help with your learning process for your classes.
Study Skills Please
Answer:
yo ni siquiera he leido Organizar Notes y quisiera responderte pero el sistema no me deja escribir bien se esta alocando
Explanation:
The schematic below represents an electrical circuit containing Five resistors.
Identify the type of circuit shown. (1 point)
ll. Compare the current in the 8-ohm resistors to the current in the 4-ohm resistors. (1 point)
lII. Justify your response (1 point)
IV. Compare the current in the 3-ahm and 8-ohm resistor to the current in the 10-ohm resistor.(1 point)
V. Justify your response. (1 point)
Answer: the answer is in the file
Explanation:
I. The electric circuit shown is series and parallel resistor connection type.
II. The ratio of current in the 8-ohm resistors to the current in the 4-ohm resistors is 0.46.
III. The current in 8 ohm is less than the current in 4 ohm resistor.
IV. The ratio of current in the 3-ohm resistors and 8-ohm resistor to the current in the 10-ohm resistors is 1.
V. The current in 3 ohm and 8 ohm resistor is same.
What is current?The current is the total amount of charge flowing in the circuit per unit time.
3 ohm and 8 ohm resistor are in series which in turn parallel with the 10 ohm resistor.
The equivalent resistance of 3, 8 and 10 ohm resistor is in series with 9 an 4 ohm resistors.
I. The circuit consists of resistances connected in parallel and series also.
II. The equivalent resistance of 3, 8 and 10 ohm resistor is [(3+8)x10/(3+8+10)] = 5.23 ohms.
Total equivalent resistance is 9 + 5.23 +4 = 18.23 ohms.
The Current in the circuit is
I= V/Req = 12/18.23
I = 0.65 A
The Current in the 8 ohm resistor is I₈ = 0.30 A
The Current in the 4 ohm resistor is I₄ =0.65 A
Their ratio I₈/I₄ = 0.46
Thus, the ratio of current in the 8-ohm resistors to the current in the 4-ohm resistors is 0.46.
III. The current in 8 ohm is less than the current in 4 ohm resistor.
IV. Current in the 8 ohm resistor is I₈ = 0.30 A
Current in the 3 ohm resistor is I₃ = 0.30 A
Their ratio I₃/ I₈ = 1
Thus, the ratio of current in the 3-ohm resistors and 8-ohm resistor to the current in the 10-ohm resistors is 1.
V. The current in 3 ohm and 8 ohm resistor is same.
Learn more about current.
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The first law of thermodynamics states that energy can neither be created nor destroyed. If this is true then why are we always looking for new sources of energy? Use the 2nd law of thermodynamics to answer this question.
Answer:
The second law of thermodynamics states in an isolated system, the entropy (the amount of thermal energy that cannot be converted into mechanical work, also known as the amount of disorder) always increases, therefore, an isolated system always require an external input (new sources) of energy for there to be orderliness or for the available energy of the system to remain constant or increase
Explanation:
It’s IT but I really need the answer
The answer to the question is logic
the diagram below represents the orbits of earth, comet temple-tuttle, and planet x, another planet in out solar system. arrows on each orbit represent the direction of movement. which objects orbit would have and eccentricity close to 1?
Answer:
the most elliptical orbit is that of COMETA
Explanation:
The eccentricity of a curve in defined as the ratio between lacia to the focus, called c and the value of the axis greater than
ε = c / a
if we use Pythagoras' theorem
c = [tex]\sqrt{a^2 - b^2}[/tex]
substituting
ε = [tex]\sqrt{1 - (b/a)^2 }[/tex]
if ε = 0 we have a circumference
In the diagram presented the orbit of the comet is an ellipse a> b
ε=[tex]\sqrt{1- x} \\ x = (\frac{b}{a} )^2[/tex]
if we expand in series
ε = 1 - x/2
ε= [tex]1 - \frac{1}{2} \ (\frac{ b}{a} )^2[/tex]
if we neglect the non-linear terms
ε = 1
Earth's orbit is a small ellipse
b / a = 149 10⁶ / 151 10⁶
b / a = 0.98675
ε = [tex]\sqrt{1- 0.98675^2}[/tex]
ε = 0.16
a very small ellipse
Planet X, despite not having data, it seems that the sun is in the scepter of the orbit, so b = a
therefore both the semi-axes of the curve
e = a / b
Consequently, the most elliptical orbit is that of COMETA.
easy:- what are the instruments used in measuring temperature
Answer:
Instrumentos Para Medir La Temperatura
Termómetro de máxima y mínima:
Termómetro metálico:
Pirómetro:
Termohidrógrafo:
How do astronomers describe the scale of the universe?
No one can know the size of the universe, it may in fact be infinitely large.
Explanation:
No one knows the size of the universe because we can't see the entire universe. We can only see the part that is close enough to us that there has been time for the light from it to arrive here. What that means is any part of the universe that it will take more than 14.5 billion years for light to travel to us can not bee seen. It is possible that the universe has no size, that is it is infinite.
We can measure what we call the "visible universe" and that is a sphere around us with a radius of about 50 billion light years, the reason it is more than the age of the universe (14.5 billion years) is because the universe is expanding more rapidly than the speed of light.
The way scientists measure the size of the visible universe is with what is called red shift. Similar to the way a car horn's pitch changes as it passes you due to doppler shift, light too has a shift in is frequency or color depending on if it is moving away or toward you. As light moves away from you it shifts for red and the faster it is moving away the more it shifts. We can estimate the distance objects are away by how much they are red shifted. When we look at the most distance objects we can see they are about 50 million light years away.
A 480 Ω resistor is connected in series to a 360 Ω resistor and a 120-V power supply.
a. Draw the circuit.
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To keep cool in the summer months, you decide to design and build your own hand-held fan. The fan's electrical circuit will run off of 4 AA batteries (each with a voltage of 1.5 V) and must not exceed 0.050 A of current. You visit your local Radio Shack and find that resistors are sold in five varieties: 5 Ohm, 10 Ohm, 12 Ohm, 20 Ohm, 50 Ohm. Each resistor costs 8 cents. What set of resistors should you buy to minimize cost?
Answer:
Two 50 Ohm Resistors, One 20 Ohm Resistor.
Explanation:
For the given current and voltage specifications, the resistance can be calculated by Ohm's Law:
[tex]V = IR\\\\R = \frac{V}{I}[/tex]
where,
R = Resistance = ?
V = Voltage = (1.5 V)(4) = 6 V
I = 0.05 A
Therefore,
[tex]R = \frac{6\ V}{0.05\ A}\\\\R = 120\ \Omega\\[/tex]
Now, to minimize the cost we will buy the following set of resistors:
Two 50 Ohm Resistors, One 20 Ohm Resistor.
what is meant by one watt power?
Answer:
one watt power is defined as power produced when one joule of work is done in one second.
hope it helps
stay safe healthy and happy
How would mass determine if an egg will crack or not and why?
Answer:
the force of the egg striking the floor or ground is greater than the force that the egg shell can exert on itself to keep its shape, the egg will break. Some eggs are stronger than others, depending on how thick the shell is.
Explanation:
credits :- http science line
Which path would the laser take when entering the water from air?
brown or black
Acceleration is displacement divided by time interval
True
Or False
A 3.33 x 10-6 F capacitor stores
8.15 x 10-4 J of energy. How much
charge is stored on the capacitor?
Answer:
7.37 * 10^ -5
Explanation:
Acellus
How much potassium nitrate, KNO3, would completely dissolve in 100g of water at 40℃?
A. 28 grams
B. 108 grams
C. 45 grams
D. 65 grams