The final temperature of the water and steel mixture after the steel is dropped is determined as 7.12 ⁰C.
Conservation of energy
From the principle of conservation of energy, the energy lost by the steel ball is equal to the energy gained by the water.
P.E(steel) - Thermal(steel) = Thermal(water)
mgh - mcΔθ = mcΔθ
where;
mass of water = density x volume = 1 kg/L x 4.5 L = 4.5 kg(6.2)(9.8)(21.7) - (6.2)(450)(27.7 - T) = (4.5)(4186)(T - 10.1)
1,318.492 - 77,283 + 2790T = 18,837T - 190,253.7
114,289.192 = 16,047T
T = 7.12 ⁰C
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Explain uses of conductors with either high or low resistance.
A 0.03 kg baby sea turtle moves across the sand toward the ocean at 0.3 m/s. What is her kinetic energy in Joules?
Answer:
.00135 j
Explanation:
K.E. = 1/2 m v^2
= 1/2 * .03 * .3^2 = .00135 j
Interference between the red and blue waves in wave set A will result in which wave?
Answer:
option 1
Explanation:
if i wanted the laser to refract less as it exits the prism, i would
If you wanted the laser to refract less as it exits the prism, you should increase the wavelength of the light.
What is refraction?Refraction can be defined as a phenomenon which describes a change (bend) in the path taken by light when it's at surfaces between different transparent materials.
According to the model of light wave, the refraction of light is inversely proportional to its wave. Thus, you should increase the wavelength of light, if you want the laser to refract less as it exits the prism.
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Formulating an Investigative Question
In this lab, you will use a magnet and a simple circuit to
examine the concepts of electricity and magnetism. Think
about how these ideas can be shown experimentally.
In the space below, write a scientific question to address
by doing this experiment.
A magnet can be used to show electromagnetic forces by showing how negative charges can move a particular piece of metal.
What is a scientific question?A scientific question is a given question derived from observation of the real world and can be answered by applying the scientific method.
In this case, a plausible scientific question might be how electromagnetic forces can move a piece of metal and we need to develop an explanation (hypothesis) to understand it.
In conclusion, a magnet can be used to show electromagnetic forces by showing how negative charges can move a metal.
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Answer:
How can magnetic and electric fields be demonstrated?
Explanation:
How far does the runner travel in 10 s going a velocity of 4m/s
Answer:
40 m
Explanation:
4 m/s * 10 s = 40 m
( see how the 's' cancels out and you're left with "m" as your answer?)
There is an increasing use of LEDs for lighting. What does LED stand for?
Answer:
LED stands for light emitting diode. LED lighting products produce light up to 90% more efficiently than incandescent light bulbs.
which of the following is a reality based condition with self-defeating patterns?
Answer:
What is a reality based condition with self-defeating patterns?
Terms in this set (35) A psychotic is reality based, yet needs psychotherapy to correct their values. A neurotic is a non-reality based person with self-defeating patterns of behavior.
Explanation:
Which sequence describes how a convection current forms in the air?
A Warm air rises-Air gets warmer- -Warm air sinks
& Cold air rises-Air warms up-Warm air sinks
C. Warm air rises-Air cools off-Cool air sinks
D. Cold air rises-Air gets cooler-Cool air rises
W
6
Answer:
C
Explanation:
Cool and dense air falls through more warm and less dense air during convection. The cooler, which is much heavier than warm air, is displacing the warmer, which has less mass. Convection always involves rising air in the atmosphere.
Answer:
C
Explanation:
Imagine a kettle. When you open it, all the hot water vapour will rise up, attempting to burst out. However, when it comes in contact with the cold air, it also becomes cold, causing it to sink back down and giving us the visual effect of steam.
You are walking through the woods and cone acroos an old well thats 15 meters deep if the speed of sound and air is 340 m/s then how long would it take to hear echo
Answer:
.0882 s
Explanation:
Sound has to travel to the bottom (15 m) then back up (15m ) to hear the echo
(15 + 15 m) / 340 m/s = .0882 s
The average reaction time is 1.5 seconds?
True
False
Answer:
false
Explanation:
The average reaction time for humans is 0.25 seconds to a visual stimulus, 0.17 for an audio stimulus, and 0.15 seconds for a touch stimulus.
If the ball reaches the ground in 8 seconds and the velocity of the ball before it hits the ground is 78.4. What is its acceleration?
also please explain how if you can
Answer:
9.8 m / s^2
Explanation:
Assuming free fall====> there is no initial downward/upward velocity
Assuming metric units 78.4 m/s
vf = a t
78.4 = a (8) shows a = 9.8 m/s^2
How do you convey your emotion in text communication?
Hey there! Hope this answer helps.
Answer:
Emojis: Emojis are a useful way to convey human emotions due to their human characteristics; they mimic the expressions of the human face, they serve as simple shorthand for conveying an emotional state without directly stating it :)Punctuation: Not only for clarity, but different uses of punctuation can be convey different things - e.g. exclamation marks (!) can express anger, emphasis, sadness or delight depending on the context, and full stops (.) or periods in the US are interpreted as bold, assertive or aggressive. On the same note, texters find sentences with no period or with ellipses more passive or open ended and formalLength: Think about it like this: "I read about your relative's passing on Insta-gram and am sorry for your loss" likely has more emotional impact than "read abt ur family's passing on ins-ta, sry 4 ur loss."- profparis
what are the 5 super typhoons that entered the Philippine Area of Responsibility (PAR)?
Answer:
2.1 Typhoon Damrey (Asiang)
2.2 Tropical Storm Longwang (Biring)
2.3 Tropical Depression 03W (Konsing)
2.4 Tropical Depression 04W.
2.5 Unnamed tropical depression.
Explanation:
Drag each label to the correct location on the image
Identify the particles and characteristics on this model of an atom
(Provide picture to explain more clearly)
A- Positively Charged
B- Electron
C- Proton
E- Neutron
D- Negatively Charged
Answer:
you cant really give any answers because i cant tell u were to drag
What is the period of oscillation for a pendulum that completes 3.00 cycles every 2.00 s?
Answer:
[tex]\huge\boxed{\sf T = 0.67\ seconds}[/tex]
Explanation:
Given Data:
Cycles = c = 3 cycles
Time = t = 2 seconds
Required:
Time period = T = ?
Formula:
1) f = c/t
2) T = 1/f
Solution:
Finding frequency first:
f = c / t
f = 3/2
f = 1.5 Hz
Now, finding period:
T = 1/f
T = 1 / 1.5
T = 0.67 seconds
[tex]\rule[225]{225}{2}[/tex]
A pendulum completes 3 cycles in 12 seconds. What is its period?
Answer:
[tex]period = 4s[/tex]
Explanation:
[tex]period = \frac{total \: time}{number \: of \: cycles} [/tex]
[tex]period = \frac{12}{3} [/tex]
[tex]period = 4s[/tex]
Discuss why schizophrenia disorder interests you.
Describe how schizophrenia impacts someone on a daily basis.
Describe the labels and/or stigma associated schizophrenia. (i.e. “crazy,” “insane,” “get over it,” “psycho,” “neurotic,” etc).
Answer:
schizophrenia is a chronic disease meaning it doesn't go away. It affects a person mentally, and on a daily basis is hard to see who or what is reality or an illusion. People with schizophrenia have a hard time getting a job, because it's hard to focus.
Most stigmas people have with schizophrenia is paranoid, or insane. They think something or someone is following them because they see something that makes them uncomfortable all the time.
Explanation:
when an Earthquake occurs energy radiates in all direction from its source called the
Answer:
[tex]\huge\boxed{\sf Focus}[/tex]
Explanation:
Focus:The point at which Earthquake occurs is called Focus.It is also called hypocenter.Epicenter:Epicenter is the point on the Earth surface which is just above the focus.Most of the times, epicenter is confused with focus. However, epicenter lies on the Earth surface and focus is the exact point from where the Earthquake originates.
[tex]\rule[225]{225}{2}[/tex]
What is the length of the shortest pipe closed on one end and open at the other end that will have a fundamental frequency of 0.060 kHz on a day when the speed of sound is 340 m/s?
Which diagram shows magnets aligned so they will attract each other?
During a race, a sprinter accelerated 1.8 m/s 2 in 2.5 seconds.How many meters per second did the sprint increase with this amount of acceleration
During a race, a sprinter accelerated 1.8 m/s 2 in 2.5 seconds. The sprint increase with this amount of acceleration by 4.5 m/s.
What is acceleration?Acceleration is the time rate of change of velocity.
Acceleration a = velocity v / time t
1.8 = v/2.5
v = 4.5 m/s
The sprint increase with this amount of acceleration by 4.5 m/s.
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A object moving in 3m radius circular path,
when it reaches the beginning point again, then
the displacement in m equals:
Answer:
0
Explanation:
Physically:
Beginning point means initial point so you're basically going into circles which means a displacement of zero.
Mathematically:
[tex]d = x _{f} - x _{i}[/tex]
We know
[tex]x _{f} =x _{i}[/tex]
So we get
[tex]d = x _{f} - x _{f}[/tex]
[tex]d = 0[/tex]
Conservation efforts have been effective in _______.
a.
increasing the number of endangered species
b.
reducing all the negative impacts of human activity
c.
preserving wildlife habitats
d.
all of the above
Answer:
The answer is D. All of the above.
Explanation:
All of these were efforts and been effective.
Answer:
c
Explanation:
A quartz crystal vibrates with a frequency of 33,621 Hz. What is the period of the crystal's motion?
______ ms
Answer:
.0297 ms
Explanation:
period = 1 / f = 1 / 33621 = .0000297 seconds= .0297 ms
A satellite with a mass of 150 kg fires its engines to increase velocity, thereby
increasing the size of its orbit about Earth. As a result, it moves from a
circular orbit of radius 7.5 x 106 m to an orbit of radius 7.7 x 106 m. What is
the approximate change in gravitational force from Earth as a result of this
change in the satellite's orbit? (Recall that Earth has a mass of 5.97 x 1024 kg
and G = 6.67 x 10-11 N-m²/kg².)
OA. -113 N
OB. -148 N
O C. -216 N
D. -54 N
The approximate change in gravitational force from Earth as a result of the change in radius of the satellite's orbit is 5. 35N
What is the universal law of gravitation?The universal law of gravitation states that the particle of matter in the universe attracts another particle with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
It is written thus;
F = G MIM2÷ r∧2
Where
F = Gravitational force
G = Gravitational constant
M1 and M2 are the masses of the object
r = radius
How to calculate the gravitational forceFormula:
F = G MIM2 ÷ r∧2
Given M1 = 150kg, M2 = 5.97 x 1024 kg, r = 7.5 x 106 m, G = 6.67 x 10-11 N-m²/kg²
For the first orbit, substitute the values
F = 6.67 x 10∧-11 × 150 × 5.97 x 10∧24 ÷ (7.5 x 10∧6)²
F = 5.95 × 10∧16 ÷ 56.25 × 10∧12 = 105.77 N
For the second orbit of radius 7.7 x 106 m
F = 6.67 x 10∧-11 × 150 × 5.97 x 10∧24 ÷ (7.7 x 10∧6)²
F = 5.95 × 10∧16 ÷ 59.25 × 10∧12 = 100. 42 N
The approximate change = 105. 77 - 100.42 = 5. 35N
Hence, the approximate change in gravitational force from Earth as a result of the change in radius of the satellite's orbit is 5. 35N
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Light ray 1 strikes the surface, separating air and water as shown below.
A horizontal line is drawn and the part above the line is labeled Air and the part below the line is labeled Water. There is one slanting ray labeled 1 which falls on the line at a point and there are four rays of light labeled 2, 3, 4, and 5 which move away from same point on the line. Ray 5 is exactly vertical to the line and below the line, ray 4 is on the right of ray 5 and makes an angle of about 25 degrees with ray 5. Ray 3 is above the line and makes an angle of about 25 degrees with the line. Ray 2 is on the right of ray 1 and ray 1 and ray 2 make angles of about 25 degrees with the vertical at the point where ray 1 strikes.
Which of the following is the refracted ray for ray 1?
Group of answer choices
Ray 2
Ray 3
Ray 4
None, ray 1 is not refracted
The ray that is part of the reflected ray must be ray 2 from the description in the question.
What is reflection?
the term reflection has to do with the bouncing back of a wave. When waves hit a surface, they can bounce back in the opposite direction. The reflection of light leads to so many phenomena such as shadow.
In this case, the ray that is part of the reflected ray must be ray 2 from the description in the question.
So RAY 2
Answer:
The ray that is part of the reflected ray must be ray 2 from the description in the question.
Explanation:
What is the mass of a ball that has 29j of potential energy and is lifted 2.0m?
Answer:
1.48kg
Explanation:
Here,
potential energy (P.E) = 29j
height (h) = 2m
acceleration due to gravity(g) =
[tex]9.8m {s}^{ - 2} [/tex]
mass(m) = ?
we know,
P.E = mgh
or, 29 = m×9.8×2
or, 29/19.6 = m
or,m = 1.48kg
Answer this question and show all the necessary steps to solve.
Answer:
√ ae/ ap = √ mp/me 1/2
Explanation:
Mass of the electron = M (Given)
Mass of the proton = M (Given)
Time = t (Given)
Electrostatic force, FE = eE (for both electron and proton)But acceleration of electron, ae =FE/me whereas
acceleration of proton, ap = FE/mp
S = 1/2at²1 = 1/2apt²2
Therefore,t2/t1= √ ae/ ap
t2/t1= √ ae/ ap = √ mp/me 1/2
Thus, the ratio is nearly equal to = √ ae/ ap = √ mp/me 1/2so, option D is correctAnswer:
Correct option is D) …
Explanation:
For electron t1 (small 1) = [tex]\sqrt{ \frac{2S}{ae}[/tex] (small e)
For protion, t2 (small 2) = [tex]\sqrt \frac{2S}{ap}[/tex] (small p)
or [tex]\frac{t2}{t1}[/tex] = [tex]\sqrt\frac{ae}{ap}[/tex] = [tex]\sqrt\frac{eE}{me} *\frac{mp}{eE}[/tex]
= [tex]\sqrt\frac{mp}{me}[/tex]
I’m gonna say everything that needs to go down as an exponent but down for example H20 but the 2 is small, also in order from top to bottom to fraction to fraction (small 2, 1, e, p, e, p, (after equal sign) p, e).
Hope this helped and brainliest pls
if the initial velocity of body is 2 metre per second and final velocity is four metre per second calculate average velocity
Answer:
3 m/s
Explanation:
Average velocity = Initial velocity + Final velocity / 2
Solving :
⇒ Average velocity = 2 + 4 / 2
⇒ Average velocity = 6/2
⇒ Average velocity = 3 m/s
if the initial velocity of body is 2 metre per second and final velocity is four metre per second calculate average velocity
Solution:AV = 2 + 4 / 2AV = 6/2AV = 6 ÷ 2AV = 3m/sSo the average velocity is 3ms.
