Explain the difference between density and concentration
Explanation:
A concentrated solution has a relatively greater amount of solute to solvent than other solutions of the same solute and solvent. A diluted solution has a relatively smaller amount of solute than similar solutions.
a 28.7 KG sled is pulled forward with a 63 net force across the ground with MK equals 0.169 what is the acceleration of the sled
Answer:
[tex]0.54\ \text{m/s}^2[/tex]
Explanation:
F = Force on the sled = 63 N
m = Mass of sled = 28.7 kg
[tex]\mu_k[/tex] = Coefficient of kinetic friction = 0.169
g = Acceleration due to gravity = [tex]9.81\ \text{m/s}^2[/tex]
The force balance of the system is given by
[tex]F-\mu_k mg=ma\\\Rightarrow a=\dfrac{F-\mu_k mg}{m}\\\Rightarrow a=\dfrac{63-0.169\times 28.7\times 9.81}{28.7}\\\Rightarrow a=0.54\ \text{m/s}^2[/tex]
The acceleration of the sled is [tex]0.54\ \text{m/s}^2[/tex].
Which is most likely to occur, reactions that would raise the potential energy of the molecules, or reactions that lower the potential energy of the molecules?
Answer:
A
Explanation:
It is more likely reactions that raise the potential energy of the molecules would occur because friction is constantly occurring. Friction leads to more heat, more energy.
Classify the waves as being mechanical or electromagnetic.
microwave
ocean wave
seismic wave
radio wave
Answer:
Seismic waves are mechanical waves because they travel through the medium of the Earth.
Explanation:
Copernicus patterned his concept of the solar system after that of
Ptolemy
Aristarchus
Galileo
Kepler
Answer:
Aristarchus
Explanation:
don't feel like it
hey guys this is physical science can i get help
answer:
1=c
2= d
3=e
4=a
5=b
Over the course of 30 seconds, 3 waves hit the shore. What is the period of the waves?
Answer:
3 per 10 seconds.
Explanation:
If it's 30 seconds and 3 waves hit throughout that time period, dividing should get you your answer..
30/3 = 10.
Hope this helped!
Source(s) used: N/A
If an object has a mass of 15 kg and has a weight of 30 N, on some remote
planet, what would be the acceleration due to gravity on that planet?
Two objects traveling at the same speed have different velocities if they
True or false:
Rock forming materials condense at much higher temperatures.
Answer:
true :-)
Explanation:
EASY BRAINLIEST!!URGENT PLEASE HELP.
-if you answer correctly ill give you brainliest which will give you 27pts-
Answer: I believe that it is A and D. Or A or D.
A, D
Explanation:
Answer: A and C
Explanation: The rest of the thermal energy goes to the engine making it heat up thats why is can overheat also letting it get destroyed
The temperature of a black body is 500 and its radiation is of wavelength 600 . If the number of oscillators with energy is 100 , 000, calculate the number of oscillators in the black body with energy 1 . (Accoding to Max. Planck, the number of oscillators with energy ℎ at a particular frequency is given by = = − ( ⁄ ) = − ( ⁄ ) (10 Marks) (b) Calculate the peak wavelength of a black body's radiation if the black body is at a temperature of 20 , 000 . (5 Marks)
Answer: An equation is missing in your question below is the missing equation
a) ≈ 8396
b) 150 nm/k
Explanation:
A) Determine the number of Oscillators in the black body
number of oscillators = 8395
attached below is the detailed solution
b) determine the peak wavelength of the black body
Black body temperature = 20,000 K
applying Wien's law / formula
λmax = b / T ------ ( 1 )
T = 20,000 K
b = 3 * 10^6 nm
∴ λmax = 150 nm/k
Need This ASAP
What is true about protein?
A.
Your body needs it to build and repair tissue.
B.
It is best to get it from the food you eat.
C.
Too much can damage your kidneys.
D.
All of the above
Answer:
D
Explanation:
write functions of simple machine
Answer:
The basic purpose for which most simple machines are designed is to reduce the effort (force) required to perform a simple task. To achieve this, the force applied must act over a longer distance or period of time resulting in the same amount of work being performed by a smaller force.
Answer:
to make work easier by reducing the effort to be used
Explanation:
A cartoon plane with four engines can accelerate at 8.9 m/s2 when one engine is running. What is the acceleration of the plane if all four engines are running and each produces the same force?
Answer:
The acceleration of the plane is 35.6 meters per square second.
Explanation:
By Newton's Laws of Motion, we know that force ([tex]F[/tex]), in newtons, is directly proportional to acceleration ([tex]a[/tex]), in meters per square second. That is:
[tex]F \propto a[/tex]
If four engines are running simultaneously and each produce the same force, then we find that acceleration of the plane is:
[tex]a_{T} = 4\cdot \left(8.9\,\frac{m}{s^{2}} \right)[/tex]
[tex]a_{T} = 35.6\,\frac{m}{s^{2}}[/tex]
The acceleration of the plane is 35.6 meters per square second.
100 degrees C equals how many degrees F?
Answer:
212 f
Explanation:
c. What is the activation energy, Ea, for this reaction? Show your work.
Explanation:
The answer is 150 because we must subtract again, we subtract the reactant (50) from the highest point in the graph, 200 – 50 equals 150.
How far can you get away from your little brother with the squirt gun filled with paint if you can travel at 3 m/s and you have 0.25 min before he sees you?
Answer:
s = 45 m
Explanation:
The velocity given in the question is uniform. Hence, the formula for the uniform velocity shall be used here. The formula is given as follows:
[tex]s = vt[/tex]
where,
s = distance traveled away from the brother = ?
v = constant speed = 3 m/s
t = time taken = (0.25 min)(60 s/1 min) = 15 s
Therefore, using these values in the formula we get:
[tex]s = (3\ m/s)(15\ s)\\[/tex]
s = 45 m
the net force acting on the ball below is ___ N
The net force applied to the object equals the mass of the object multiplied by the amount of its acceleration." The net force acting on the soccer ball is equal to the mass of the soccer ball multiplied by its change in velocity each second (its acceleration).
who plays rob.lox , adopt me here?
Want to be friends?
Miranda performed an experiment to determine what makes an object sink
or float in water. She experimented with 10 different items and recorded
the results. Which of the following is correct?
The object's shape is the only determining factor.
The size of the object determines if it will sink or float
The mass and volume of an object determine if it will sink or float
Light-colored objects tend to float more easily than darker-colored object
Answer:
I guess the answer is
-The mass and volume of an object determine if it will sink or float
Explanation:
An object that has a higher density than the liquid it's in will sink. An object that has a lower density than the liquid it's in will float.
density=mass/volume
the earth is squeezed to the size of the moon, then what will be its effect on the gravity of the earth
what is visible spectrum?
Explanation:
The band of electromagnetic radiation that human eyes can detect. This ranges from wavelengths of approximately 400 to approximately 700 nanometers (nm).
Explanation:
It's the portion of the electromagnetic spectrum that is visible to the human eye.
How can we relate density and pressure in liquids ??
How can we relate density and pressure in liquids ??
[tex] \huge{ \texttt{ \red{answers}}}[/tex]
It is the pressure at each point of a static fluid. When we immerse ourselves in a liquid, the pressure increases with depth.In the case of a liquid (constant density) the pressure increases linearly with depth.⭐ ----------------------------------------------------------------------------------⭐
[tex] \bold{BRAINLY MENTALMENTE}[/tex]
In a real pully system the work supplied must be _____ the work accomplished
A 5.0-ohm resistor, a 10.0-ohm resistor, and a 15.0-ohm resistor are connected in parallel with a battery. The current through the 5.0-ohm resistor is 2.4 amperes. Calculate the amount of electrical energy expended in the 5.0-ohm resistor in 2.0 minutes.
Answer:
E = 3456 J
Explanation:
The electrical energy expended in a resistor can be easily calculated by using the following formula:
[tex]E = Pt[/tex]
where,
E = Energy Expended = ?
I = current through 5 ohm resistor = 2.4 A
R = Resistance = 5 ohms
P = Electrical Power = VI
Since,
V = IR (Ohm's Law)
Therefore,
P = (IR)(I) = I²R = (2.4 A)²(5 ohms) = 28.8 Watt
t = time taken = (2 min)(60 s/1 min) = 120 s
Therefore,
E = (28.8 Watt)(120 s)
E = 3456 J
To pull apart two pieces of wood, you can apply a force of 50 N to a lever. The lever applies a force of 640 N. What is the mechanical advantage of
the lever?
A.13
B.17
C.0.08
D.32,000
Give reasons for the following:
a. We should not see the solar eclipse directly through our unaided eyes.
b. Dark patches are seen on the ground when sunlight passes through dense tree.
Answer:
a)The reason why people are advised not to watch the Solar Eclipse with naked eyes is that when the Moon in direcly between the Earth and the Sun, the rays from the Sun that reach the Earth are more powerful and can permanently damage our retina (most important part of the eye).
Explanation:
b ) The leaves of the trees obstruct (stop) the rays coming from the sun as there is no sun the soil to will be marshy. in some places where the leaves are not thick the sunlight penetrates to the ground... therefore one mostly sees dark patches on the ground in dense forests.
Answer:
The reason why people are advised not to watch the Solar Eclipse with naked eyes is that when the Moon in direcly between the Earth and the Sun, the rays from the Sun that reach the Earth are more powerful and can permanently damage our retina (most important part of the eye).The leaves of the trees obstruct (stop) the rays coming from the sun as there is no sun the soil to will be marshy. in some places where the leaves are not thick the sunlight penetrates to the ground, therefore one mostly sees dark patches on the ground in dense forests.Help pls and. No links pls
Answer:
the answer to this question will be False
Answer:
false.......,.....,...........
Which of the following is an electric potential?
O A. 2.50
B. 2.5 N
C. 2.5 V
O D. 2.53
Answer:
B
Explanation:
just answered that question