Answer:
the time rate of change of momentum is equal
Answer:
the time rate of change of momentum is equal to the force acting on the particle.
Explanation:
hope this is helpful :)
Brown hills and canyons that make up part of the San Andreas fault zone The photo shows the San Andreas fault zone. This is a fault formed at a transform boundary. What would you expect to find along this fault? rift valleys volcanoes earthquakes mountains
Answer:
C
Explanation:
I took the asssinghment and got an 100
Your answer is: earthquakes.
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Have a good day and God bless! :D
when energy is transferred from ond object to another, what must occur?
Answer:kinetic energy
Explanation:
Marcie weighs 98 lbs. What is her mass?
Answer:
44.492 kg
Explanation:
Convert pounds to kilograms.
1 lb = 0.454 kg
98 lb * 0.454 kg =44.492 kg
Answer:
what he said above is correct yes
Explanation:
Traveling at high altitudes_________ vehicle engine performance when compared to operating the same vehicle at sea level
Answer:
Lessens
Explanation:
The performance of an engine at high altitudes is lower due to the decreasing density of air with elevation, such that at high altitude, the density is much less and a given quantity of oxygen occupies much more space at high altitudes, and the oxygen content in the air drawn in is lesser at high altitude, and the combustion power is much lesser at high altitudes when the engine speed is high up to about 4000 rpm.
When play stops in the game of hockey, to restart the action what is that called? (Hint: there are several points on the rink)
Answer:
Face - off
Explanation:
Face - off is a term used in ice hockey to start periods of play and also to restart the play/action after a previous stoppage.
This face - off involves two opposing players from the 2 opposing teams standing opposite each other at an approximate distance of one sticks blade with the game official dropping the puck between them. Thereafter, two players will then to try to gain possession of the puck.
an engine supplies 40,000 joule of heat energy per minute what is the power of the engine in kilowatts
Two circular rods, both of length L and having the same diameter, are placed end to end between rigid supports with no initial stress in the rods. The coefficient of linear expansion and Young's modulus for rod A are αA and YA respectively; those for rod B are αB and YB respectively. Both rods are "normal" materials with α>0. The temperature of the rods is now raised by ΔT.
What is the stress F/A in the rods after heating?Express the stress in terms of ?A, ?B, YA, YB, and ?T.
Answer:
[tex]\mathbf{\dfrac{F}{A}= -\dfrac{( \alpha_A + \alpha _B)\Delta T}{\bigg ( \dfrac{1}{Y_A}+ \dfrac{1}{Y_B}\bigg )} }[/tex]
Explanation:
From the information given.
The formula for Youngs modulus(Y) can be illustrated as follows:
[tex]Y = \dfrac{F/A}{\Delta L /L}[/tex]
where;
F = force
A = area
ΔL / L = the fraction of the change that occurred in the length.
If we make ΔL / L the subject of the formula, the above expression can be re-written as:
[tex]\dfrac{\Delta L}{L } = \dfrac{1}{Y}\dfrac{F}{A}[/tex]
However, the total fractional change that occurred in the length can be computed as:
[tex]\dfrac{\Delta L_{compressive \ stress}}{L} = \dfrac{\Delta L_A}{L_A} + \dfrac{\Delta {L_B}}{L_B}[/tex]
where;
[tex]L = L_A = L_B[/tex]
The area of both rods is said to be equal as well.
Thus;
[tex]\dfrac{\Delta L_{compressive \ stress}}{L} = \dfrac{1}{Y_1} \dfrac{F}{A}+ \dfrac{1}{Y_2}\dfrac{F}{A}[/tex]
[tex]\dfrac{\Delta L_{compressive \ stress}}{L} =\bigg( \dfrac{1}{Y_1} + \dfrac{1}{Y_2} \bigg ) \dfrac{F}{A}[/tex] ----- Let this be equation (1)
Recall that:
[tex]\dfrac{\Delta L }{L }= \alpha \Delta T[/tex]
in which
ΔL = change in length
L = the original length of rod before extension
∝ = coefficient of linear expansion
ΔT = temperature change
Similarly:
The total fractional change in the length is:
[tex]\Delta L _{thermal} = \Delta L_A +\Delta L_B[/tex]
[tex]\Delta L _{thermal} = \alpha_AL \Delta T+\alpha_BL \Delta T[/tex]
[tex]\dfrac{\Delta L _{thermal}}{L} =( \alpha_A+ \alpha _B) \Delta T \ \ \ ---(2)[/tex]
The sum of both the thermal and compressive stress of the combined rod is equal to the fractional change.
Mathematically:
[tex]\Delta L_{net} = \Delta L_{thermal} + \Delta L_{compressive \ stress}[/tex]
where;
[tex]\Delta L_{net} =0[/tex]
∴
[tex]0 = \Delta L_{thermal} + \Delta L_{compressive \ stress}[/tex]
[tex]\Delta L_{compressive \ stress} =- \Delta L_{thermal}[/tex]
From equation (1) & (2)
[tex]\bigg( \dfrac{1}{Y_1} + \dfrac{1}{Y_2} \bigg ) \dfrac{F}{A}= - (\alpha_A + \alpha_B) \Delta T[/tex]
Making the stress [tex]\dfrac{F}{A}[/tex] the subject, we get;
[tex]\mathbf{\dfrac{F}{A}= -\dfrac{( \alpha_A + \alpha _B)\Delta T}{\bigg ( \dfrac{1}{Y_A}+ \dfrac{1}{Y_B}\bigg )} }[/tex]
In what ways are electric and magnetic fields similar and in what ways are they diffrent
Electric field and magnetic field has both the attractive and repulsive character.
What is meant by electric field ?Electric field is defined as the region surrounding a charged particle, in which it experiences an electric force.
Here,
Electric field and magnetic field has both the attractive and repulsive character.
Both electric and magnetic fields obey the inverse square law.
Stationary charges produce electric field, whereas moving charges produce magnetic field.
Electric field is associated with two kind of charges, positive and negative, whereas magnetic field is associated with two magnetic poles, north and south.
Both electric field and magnetic field are associated with principle of superposition.
Hence,
Electric field and magnetic field has both the attractive and repulsive character.
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Which does not decrease your chances of being injured
A Warmup
B Overload
C Exercise
D Cooldown
An ant walks 2 m in a straight line over a period of 40 s. What is the average speed of the ant?
Answer:
speed is equal to distance/time
so 2m/40s
=0.05
a ball is dropped from a height of 13.3 m. how long will it take for the ball to hit the ground?
Answer:
i dont know the actual answer but i can tell you that it takes 4 seconds for a ball to hit the ground .
Explanation:
A bike is traveling at a speed of 15 m/s. The mass of the bike is 30 kg. What is the kinetic
energy of the bike?
Answer:
3375 JExplanation:
The kinetic energy of an object can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
m is the mass
v is the velocity
From the question we have
[tex]k = \frac{1}{2} \times 30 \times {15}^{2} \\ = 15 \times {15}^{2} \\ = {15}^{3} \: \: \: \: \: \: \: \: \: \: [/tex]
We have the final answer as
3375 JHope this helps you
look at the picture and help me please!! WHAT ARE THOSE 4 QUESTIONS!!!???
Answer:
a, b, a, c, that should be the order from top to bottom
CAN YALL HELP ME WITH DIS PLZ
Answer:
it would dry your hair lol
Directions: Label the name of the element found in the body. Which one is an Isotope?
Answer:
Carbon Dioxide
Explanation:
Isotopes can be found in Carbon 12
Question 1 An atom of magnesium and two atoms of chlorine react and yield the compound of magnesium chloride. Which option represents this scenario as a chemical equation? 2Cl → → Mg + MgCl2 2Cl right arrow Mg + MgCl2 Mg + 2Cl → → MgCl2 Mg + 2Cl right arrow MgCl2 MgCl2 → → Mg + Mg + Cl MgCl2 right arrow Mg + Mg + Cl Mg → → 2Cl + MgCl2 Mg right arrow 2Cl + MgCl2 MgCl2 → → Mg + 2Cl
Answer:
Mg + 2Cl ----> MgCl2
Explanation:
In writing a chemical reaction equation, it is a rule that the number of atoms of each element on the right hand side must be equal to the number of atoms of each element on the left hand side.
If this condition is fulfilled, the reaction equation is said to be balanced.
In this case, there are two chlorine atoms and one magnesium atom on both sides of the reaction equation hence the equation is balanced.
What ocean features occur along areas of volcanic activity in the ocean floor and release high pressure, extremely hot water and chemicals?
Trenches
Mid-ocean ridges
Hydrothermal vents
Continental shelfs
Answer:
Hydrothermal vents
Explanation:
A hydrothermal vent is found along with areas of volcanic activity in the ocean floor which discharges geothermally heated water. Tectonic plates in such areas move apart at spreading centers and hotspots to form hydrothermal vent.
A hydrothermal vent ejects hot and often toxic, fluids and gases into the surrounding seawater when seawater meets magma.
Hence, the correct answer is "Hydrothermal vents".
If an organism had the following organelles: mitochondria, chloroplast, ribosome, nucleus, cell wall, and cell membrane, what type of organism is the cell found
A. Plant and Animal
B. Only Animal
C. Animal & Fungi
D. Only plants
Answer:
D
Explanation:
A sound wave traveling through dry air has a frequency of 15 Hz, a
wavelength of 23 m, and a speed of 345 m/s. When the sound wave passes
through a cloud of ammonia gas, its wavelength changes to 28 m, while its
frequency remains the same. What is its new speed? (The equation for the
speed of a wave is v= f xx.)
A. 22 m/s
B. 420 m/s
C. 350 m/s
D. 9,700 m/s
Answer: b. 420 m/s
Explanation: ap3x
The frequency of the wave with the speed of 345 m/s and wavelength of 23 m is 15 Hz. With the same frequency the speed of wave t 28 m wavelength will be 420 m/s.
What is frequency ?Frequency of a wave is the number of wave cycles per unit volume. It is the inverse of time period thus have the unit of s⁻¹ which is equivalent to one Hz. Frequency is inversely proportional to the wavelength.
The relation between frequency, wavelength and speed of a wave is written as follows:
c = νλ
Given that, speed of the wave = 345 m/s
wavelength =23 m
frequency = speed/wavelength
v = 345 m/s /23 m = 15 Hz.
New wavelength = 28 m
frequency = 15 Hz
then speed = 15 Hz × 28 m = 420 m/s.
Hence, the speed of the wave become 420 m/s. Option B is correct.
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PLEASE HELP MEEEE
marking brainliest
Answer:
Option C
Explanation:
Centripetal acceleration formula regarding velocity and radius is,
[tex]a_c=\frac{v^2}{r}[/tex]
now we know the centripetal acceleration is 9 and the radius is 16 so we plug these values into our formula,
[tex]a_c=\frac{v^2}{r}\\\\9=\frac{v^2}{16} \\\\144=v^2\\\\\sqrt{144}=v \\\\v=12\ m/s[/tex]
so velocity is 12 m/s
Now for the angular velocity, the formula of centripetal acceleration regarding angular velocity and radius is,
[tex]a_c=rw^2[/tex]
we know the centripetal acceleration is 9 and the radius is 16 so plug these values into the formula,
[tex]a_c=rw^2\\\\9=16w^2\\\\0.5625=w^2\\\\\sqrt{0.5625}=w \\\\0.75\ rad/s=w\\[/tex]
so angular velocity is 0.75 rad/s
A steel tape measure is accurate at 20 degree Celsius. It is used at 10 degree Celsius to measure off a kilometre distance. What reading will tape shows?
25.006m
Hope it helps! :3
How is the earth a cracked hard boiled egg
The volume of an irregular object can be measured by
a. multiplying the object’s length, width, and height.
b. multiplying the object’s density by its mass.
c. submerging the object in water in a graduated cylinder.
d. placing the object on a triple-beam balance.
Earthquakes are especially associated with ___ boundaries
Can someone please help with this one?!
Answer:
Explanation:
i wanna say its A
Unlike acceleration and velocity, speed is NOT a quantity that accounts for..
a. distance
b. direction
c. time
d. movement
Answer:
B
Explanation:
direction is literally the only difference between speed and velocity
Taking into account the definition of speed and velocity, the correct answer is option b. Unlike acceleration and velocity, speed is NOT a quantity that accounts for direction.
SpeedSpeed refers to the distance an object travels in a given time and is a scalar quantity.
VelocityOn the other hand, velocity is a magnitude that expresses the relationship between the space traveled by an object, the time used for it and its direction. In other words, velocity refers to the interval of time it takes for an object to move towards a certain direction. Since velocity considers the direction in which an object moves, it is considered a vector character magnitude.
SummaryIn summary, speed does not take into account the direction of movement, while speed implies the change of position of an object in space within a certain amount of time, that is, speed plus the direction in which said movement is produced.
Correct answerFinally, the correct answer is option b. Unlike acceleration and velocity, speed is NOT a quantity that accounts for direction.
Learn more:
https://brainly.com/question/13881070?referrer=searchResultshttps://brainly.com/question/11214858?referrer=searchResultsA sailboat on a lake sails 90. meters north and then sails 60. meters due east. Compared to its starting position, the new position of the sailboat is
show your work
Answer:
The new position of the sailboat is 108.2 m, at N 53.3° E
Explanation:
From the image uploaded, R is the resultant displacement and it is calculated as;
R² = 90² + 60² (Pythagoras theorem)
R² = 11700
R = √11700
R = 108.2 m
The direction of the boat is given by θ in the image uploaded;
tanθ = opp/adj
tanθ = 90 / 60
tanθ = 1.5
θ = tan⁻¹(1.5)
θ = 53.3°
θ = N 53.3° E
Therefore, the new position of the sailboat is 108.2 m, at N 53.3° E
_SeC16+_O2>_SeO2+_C12
Answer:
SeC14
Explanation:
sec14>C12-O
but since you can't subtract o from c , you get this
PLEASE HELP ASAP
In this diagram you see a wave. B is at the high point of the wave; D is at the low point in the wave. A, D, and E are located where the wave crosses the t-axis.
Which letter represents the trough of the wave?
if a book of mass 50 kg is placed on the table of mass 200 kg what will be the weight of table and reaction of table on the book?
Answer:
See the answer below.
Explanation:
The weight of the table should be equal to the weight of the table plus the weight of the book.
[tex]w_{table}=m_{table}*g\\w_{table}=200*9.81\\w_{table}=1962[N][/tex]
And for the book
[tex]w_{book}=m_{book}*g\\w_{book}=50*9.81\\w_{book}=490.5[N][/tex]
And the total weight
[tex]w = w_{table}+w_{book}\\w=1962+490.5\\w = 2452.5 [N][/tex]
For the system to be in balance, the reaction force exerted by the table on the book must be equal to the weight of the book. This force in physics is known as the normal force.
[tex]N_{force} = w_{book}\\N_{force}=490.5[N][/tex]