Answer:
B
Explanation:
A rollercoaster has an initial hill that is 25 meters high and a second hill that is 15 meters high. If a car starts at rest at the top of the first hill and rolls to the top of the second hill without losing any energy how fast will it be moving at the top of the second hill?
If a roller coaster loop were perfectly circular, the peak speed would be equal to vmin=gR, where g=9.8m/s2 and R is the radius of the "circle."
What type of power propels a roller coaster to the summit of a hill?Because friction and drag start depriving the car of energy right away, the first hill of a roller coaster is always the steepest part of the ride. A car's energy is virtually completely gravitational potential energy at the summit of the first slope (because its velocity is zero or almost zero).
The transformation of potential energy into kinetic energy drives the motion of a roller coaster. The potential energy of the roller coaster vehicles increases as they are propelled to the summit of the first hill. Potential energy is transformed into kinetic energy as the vehicles fall.
The potential energy will be 0 at the base of the hill.
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Let's assume that India began to plow into the Asian continent 55 million years ago and that, since then, it has continued to uniformly move northward into the Asian continent at 6 centimeters per year (for 55 million years). Calculate the total distance (in kilometers) that India has plowed into Asia.
The total distance (in kilometers) that India has plowed into Asia is 330,000 km.
total distance (in kilometers) that India has plowed into Asia
The total distance (in kilometers) that India has plowed into Asia is calculated as follows;
distance = speed x time
distance = 6 cm/year x (55 x 10⁶ years)
distance = 330,000,000 cm
distance = 330,000 km
Thus, the total distance (in kilometers) that India has plowed into Asia is 330,000 km.
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27. Raven is a geologist. She is measuring something called the porosity of a rock. The actual porosity of the rock sample is 0.114. Raven measures the porosity as 0.120. What is Raven's percent error on this
measurement?
0.0526%
0.006%
0.600%
5.26%
Raven's percentage error of the measurement is 5.26%
Formula for percentage errorPercentage error = (absolute error / standard measurement) × 100
How to determine the percentage error on the measurementThe pecenrage error of the measurement can be obtained as illustrated below:
Standard measurement = 0.114Measured value = 0.120Absolute error = 0.120 - 0.114 = 0.006Percentrage error =?Percentage error = (absolute error / standard measurement) × 100
Percentage error = (0.006 / 0.114) × 100
Percentage error = 5.26%
Thus, the perecentage error of Raven's measurement is 5.26%
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Answer:
I think the answer is 5.26%
but please let me know if I was wrong.
5.26% is the answer I got
Explanation:
Give 3 examples of how organs systems work together
The digestive system, the circulatory system and the respiratory system all these works together for the maintenance of the body.
What are the three ways that how organs system work together?
1. The heart pumps the blood in our body, the lungs bring the oxygen in and eliminates the carbon dioxide out of the body, and the skin provides the protection and work as a barrier and safe the internal body organs.
2. The digestive, respiratory and circulatory system all these organs works together for extracting the wastes from our body but also absorbing the necessary nutrients which is good for body.
3. Our circulatory system carries the oxygen, minerals, nutrients and water and provide to cell in our body. The cells eliminated the wastes of the body through the respiratory system, by our excretory system and from our skin.
So we can conclude that the digestive system, the circulatory system and the respiratory system all these works together for the maintenance of the body.
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A box has a mass of 30kg and accelerates at a rate of 3 m/s. If the force of friction on the box is 20N, how much force did YOU exert in order to move it?
The Force applied on the box to accelerates it at a rate of 3 m/s² is 404 N.
What is force?Force is a pull or push effect on a body.
The force on a body is related to the mass and the acceleration of the body.
The formula to calculate force is given below:
Force = mass * accelerationConsidering the given question;
The force involved are:
frictional forcea net force which produces acceleration of the boxthe force of gravity on the boxThe force applied on the boxForce applied = Net force + weight of the body + frictional force
weight of the body = mass * acceleration due to gravity, g
Weight of the body = 30 * 9.8 m/s
Weight of the body = 294 N
Net Force = 30 * 3 = 90 N
Force applied = 90 N + 294 N + 20 N
Force applied = 404 N
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Aliyah is driving up and down a street, looking for a parking spot. She drives 210 meters north, then
turns around and drives 370 meters south. Which of the following equations are accurate?
od
1
d =
160 m
d -
580 m
d=580 m
-160 m
Od-580 m
Od=-160 m
The equations that are accurate regarding the displacement by Aliyah is d vector = - 160 m and the distance travelled by Aliyah is d = 580 m
Total distance travelled = 210 + 370
Total distance travelled = 580 m
Displacement = Final position - Initial position
Final position = 370 - 210
Final position = 160 m
Displacement = 160 - 0
Displacement = 160 m South
Displacement = - 160 m
Distance travelled is a scalar quantity. So direction is not taken into consideration. Displacement is a vector quantity. Since her overall displacement is towards the south direction its value is negative.
Therefore, The equations that are accurate are:
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Using something as a medium of exchange in transactions (money)
We can use currency as a medium of exchange in transactions because of its easy availability.
What is the basic medium of exchange for transaction?Currency is the most common medium of exchange accepted as a standard by all parties for settling economic transactions because every region or country has its specific type of currency in which they do transactions and carried out their economic activities world wide. Currency is also considered as a medium of exchange for goods and services. It is money that is present in the form of paper and coins which is issued by a government. Currency is generally accepted because of high value as a method of payment. U.S. dollars ($), euros (€), Japanese yen (¥), and pounds sterling (£) are the examples of currencies of different countries around the world.
So we can conclude that We can use currency as a medium of exchange in transactions because of its easy availability.
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Aaron ran 500 meter in 100 Seconds. Find the speed in km per hour.
Answer:
50km
cuz he ran so fast in 100 seconds
3. An object is dropped from 600m, If it is initially at rest, how fast will it go as it
Hits the ground?
The velocity of the object as it hits the ground, given the data from the question is 108.486 m/s
How to determine the final velocityWe'll begin by obtaining the time take to reach the ground. this is illustrated below:
Height (h) = 600 mAcceleration due to gravity (g) = 9.8 m/s²Time (t) =?h = ½gt²
600 = ½ × 9.8 × t²
600 = 4.9 × t²
Divide both side by 4.9
t² = 600 / 4.9
Take the square root of both side
t = √(600 / 4.9)
t = 11.07 s
Finally, we can obtain the final velocity as follow:
Time (t) = 11.07 sInitial velocity (u) = 0 m/sAcceleration due to gravity (g) = 9.8 m/s²Final velocity (v) =?v = u + gt
v = 0 + (9.8 × 11.07)
v = 0 + 25.088
v = 108.486 m/s
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A long rectangular, yellow sign with diagonal black stripes on it means:
O There is a highway ahead
O Be prepared to stop
O The guardrails of a narrow bridge are ending
OYou are going the wrong way
A long rectangular, yellow sign with diagonal black stripes on it means Be prepared to stop.
Hazard warning signs consist of black diagonal stripes on a yellow background. WA-36 signs are used to mark roadway obstructions that are passable from either side. Hazard warning signs consist of black diagonal stripes on a yellow background. WA-36 signs are used to mark roadway obstructions that are passable from either side.
Warning sign. These signs warn of dangerous or unusual conditions such as curves, turns, inclines, and side streets. They are usually diamond-shaped and have black letters or symbols on a yellow background. These markings, yellow diagonal lines, are found on roads and highways to indicate narrow roads or obstructions in the lane. This area resembles a triangle with a solid yellow diagonal line inside the outline.
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. A man rows a boat in still water at 6.0km/h, he wishes to
row due north across a river 3.0km wide which is flowing
due east at 2.0km/h. calculate
a. The direction in which he must head the boat
b. The time taken to reach the other bank
The direction in which he must head the boat is 30° West of North. The time taken to reach the other bank is 0.86 hours.
Velocity of boat with respect to water, [tex]V_{BW}[/tex] = 6 km / h
Velocity of river, [tex]V_{W}[/tex] = 2 km / h E
If the boat has to reach the exact opposite side of the river from the starting point, the boat should go upstream.
Velocity of boat in upstream, [tex]V_{B}[/tex] = [tex]V_{BW}[/tex] - [tex]V_{W}[/tex]
[tex]V_{B}[/tex] = 6 - 2
[tex]V_{B}[/tex] = 4 km / h
θ = [tex]sin^{-1}[/tex] ( [tex]V_{W}[/tex] / [tex]V_{B}[/tex] )
θ = [tex]sin^{-1}[/tex] ( 2 / 4 )
θ = [tex]sin^{-1}[/tex] ( 0.5 )
θ = 30° W of N
cos θ = Adjacent side / Hypotenuse
cos 30° = 3 km / Distance covered by the boat
Distance covered by the boat = 3 / 0.87
Distance covered by the boat = 3.45 km
t = d / v
t = 3.45 / 4
t = 0.86 hr
Therefore,
The direction in which he must head the boat is 30° West of NorthThe time taken to reach the other bank is 0.86 hours.To know more about speed of boat in a river
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Due to which of the following phenomena, the coloured glass appears white when crushed into fine powder?
Total Internal Reflection
Diffraction
Scattering
Refraction
The phenomenon due to which the colored glass appears white when crushed into a fine powder is known as total internal reflection. Thus, the correct option for this question is A.
What is Total internal reflection?Total internal reflection may be defined as a phenomenon that significantly involves the reflection of a ray back to the identical medium when glancing from a denser medium to a rarer medium in such a way that the angle of incidence is found to be greater than its critical angle.
Due to this phenomenon of total internal reflection, not partial but complete reflection of a ray of light within a medium occurred within the surroundings of a medium such as water or glass. As a result of this, the colored glass appears white when crushed into fine powder.
Therefore, the total internal reflection is the phenomenon due to which the colored glass appears white when crushed into a fine powder. Thus, the correct option for this question is A.
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An archer shoots an arrow over flat ground. The speed of the arrow is 45m/s. A.) What is the maximum possible range of the arrow? B.) At this range, what is the maximum height? C.) What 2 angles will give a range of 90 meters?
the answer is 80 degrees so simple try solving again
3) If the displacement of an object, x, is related to velocity, v, according to the relation .x = Av,
the constant, A, has the dimension of which of the following?
a) acceleration
b) length
c) time
d) area
If the displacement of an object, x, is related to velocity, v, according to the relation .x = Av the dimension of which of the following is time.
What is displacement?An object's position changes if it moves in relation to a reference frame, such as when a passenger moves to the back of an airplane or a lecturer moves to the right in relation to a whiteboard. Displacement describes this shift in location.
A = x/v
since x is displacement and v is velocity
x/v = m/(m/s) = s
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A 3m beam of negligible weight is balancing in equilibrium with a fulcrum placed 1m form its left end. If a force of 50N is applied on its right end, how much force would needs to be applied to the left end.
By applying principle of moment, the force that would be needed to be applied to the left end will be 100 N
What is a Moment ?A moment is the product of a force and its perpendicular distance. It is measured in Nm
Given that a 3m beam of negligible weight is balancing in equilibrium with a fulcrum placed 1m from its left end. If a force of 50N is applied on its right end, the clockwise moment will be equal to anticlockwise moment.
The clockwise moment = 50 × 2 = 100 Nm
The anticlockwise moment = F × 1 = F Nm
Equating the two parameters gives
F = 100 N
Therefore, the force that would be needed to be applied to the left end will be 100 N
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Describe how the structure of the kangaroo paw flower fits with a bird pollinator.
The structure of the kangaroo paw flower fits with a bird pollinator because of its tabular structure.
How the structure of the kangaroo paw flower fits with a bird pollinator?The tabular structure of the kangaroo paw flower fits with a bird pollinator because it gives easy access to the nectar of the flower. These flowers are covered with hairs and have pointed lobes, which are in curved shape at their tips that gives them the appearance of kangaroo paws. These curved tips and tabular structure provides good access to the bird pollinators as well as the colorful petals also attracts the pollinators towards itself.
So we can conclude that The structure of the kangaroo paw flower fits with a bird pollinator because of its tabular structure.
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you are flying a plane at a rate of 8m/s north. the wind is blowing 6m/s south. What is your resultant
Your resultant velocity will be along the + y - direction or north direction and has magnitude of 2 m/s.
What are vector quantities?The quantities that have both magnitude and direction are called vector quantities. Example - velocity, acceleration, force etc.
Given in the question is a plane flying at a rate of 8m/s north and the wind is blowing 6m/s south.
In order to find the resultant, refer to the diagram attached. The north direction is represented by +y axis and south direction is represented by -y axis.
The velocity vector representing you will be [v1] = 8 j
The velocity vector representing the wind will be [v2] = - 6 j
Resultant vector [v] = v1 - v2 [Opposite and unequal vectors]
v = 8 j - 6 j
v = 2 j
Therefore, you resultant velocity will be along the + y - direction or north direction and has magnitude of 2 m/s.
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Need help answering questions
[tex] { \sqrt[ \frac{ { \infty \binom{ log_{ \tan( \gamma \beta log( \alpha \sin( \csc(\%) ) ) ) }(?) }{?} }^{?} }{?} \times \frac{?}{?} ]{?} }^{2} [/tex]
What do you observe now do the same with the second plastic shopping bag square
The observation is that we will observe a large shadow in dark color on the wall.
How to illustrate the information?The light will be blocked if we place our largest plastic shopping bag between the light source and the wall.
When something stops the path of the light, the light can't pass through it, and we may see a black shadow where it can't.
Therefore, we may state that a shadow will be visible when a bag is held between a light source and a wall.
If the bag is transparent, we will still be able to see a shadow, but it won't be as dark as previously because transparent materials let some light through but not as much as other materials do.
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What do you observe if you switch on your light source. make sure it's shining onto a wall hold your largest plastic shopping bag square between the light source and the wall
A runner accelerated from rest for 12 s, at which time the runner has traveled 100 m. what were the runners average and final velocities
If a runner accelerated from rest for 12 s, at which time the runner has traveled 100 m, then the runner's average and final velocities would be 8.33 m /s and 16.66 m/s.
What are the three equations of motion?There are three equations of motion given by Newton
v = u + at
S = ut + 1/2×a×t²
v² - u² = 2×a×s
By using the second equation of motion given by newton,
S = ut + 1/2at²
100 = 0 + 0.5*a*12*12
a = 100 / 72
a = 1.388 meters / second²
The final velocity of the runner = 12*1.388
=16.66 m/s
The average velocity = 16.66 /2
=8.33 m /s
Thus, the average velocity of the runner would be 8.33 m /s and the final velocity of the runner would be 16.66 m/s
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the passage below was published by montesquieu in 1748 how did these ideas influence the founding fathers of the united states
The passage below was published by Montesquieu in 1748. They decided to separate the powers of government into three branches. Option D
This is further explained below.
Who is Montesquieu?Generally, Montesquieu was a French judge, a man of letters, historian, and political philosopher.
His full name was Charles Louis de Secondat, Baron de La Brède et de Montesquieu, although he is most often known by his nickname, Montesquieu.
He is the primary originator of the notion of the separation of powers, which is incorporated into the constitutional framework of numerous countries around the globe.
In conclusion, The following text was written by Montesquieu and first appeared in print in the year 1748. They came to the conclusion that the powers of the government should be divided into three distinct branches. The D Option
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cq
The passage below was published by Baron de Montesquieu in 1748. How did these ideas influence the Founding Fathers of the United States?
answer choices
They decided to establish a constitutional monarchy.
They decided to establish a representative form of government.
They decided to separate the powers of government into three branches.
They decided each branch of government should be able to check the other branches.
Given a cylinder with a radius of 14.4 cm and a height of 16.8 cm, find the lateral surface area
Answer:
1520.03cm²
Explanation:
AL=2πrh=2·π·14.4·16.8
WILL GIVE BRAINLIEST!!!!
According to the giant impact hypothesis, the young proto-Earth and a Mars-sized protoplanet called Theia collided. The collision ejected material into space called ejecta material. What implication could this collision have for the Moon?
Group of answer choices
Ejecta material coalesced in the Moon and formed the protoplanet Theia that collided with Earth.
Theia collected ejecta material and with it became the Moon when it coalesced and set up in Earth’s orbit.
Ejecta material formed the Moon when it set up in Earth’s orbit, coalesced, cooled down, and solidified.
Theia brought ejecta material to Earth’s orbit and became the Moon when it cooled down, and solidified.
The implication that the collision will have for the moon is D. Theia brought ejecta material to Earth’s orbit and became the Moon when it cooled down, and solidified.
What does the giant impact theory explain?The hypothesis is the prevailing explanation accepted by the scientific community, and it contends that the moon developed as a result of an object slamming into the early Earth. Earth originated from the residual dust and gas cloud surrounding the newborn sun, just like the other planets.
The Moon may have formed from the ejecta of a collision between the proto-Earth and a planet the size of Mars, according to the giant-impact scenario, also known as the Big Splash or the Theia Impact.
Therefore, based on the information, the correct option is D.
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Rhea, with a radius of 7.63 x 105 m, is the second-largest moon of the planet Saturn. If the mass of Rhea is 2.31 x 1021kg, what is the acceleration due to gravity on the surface of this moon?
The acceleration due to gravity on the surface of this moon:
Solution:
R = 7·63x105 m m
M = 2·31x10² 1 kg
g= GM/R2
= 6.67x10" x 2.3 x [tex]10^{21}[/tex]/[tex](7.63*10^{5} )^{2}[/tex]
=g = 15.4077 x [tex]10^{10}[/tex]/[tex](7.63)^{2} * 10^{10}[/tex]
= g = 0·2646 m/s².
An object on the Moon weighs 1/6 of its weight on the Earth's surface. This is because the gravitational acceleration on the Moon is six times that of Earth. The value of g is determined by the mass of the gigantic body and its radius. It depends on your body. The value of g is constant for months. g is called gravitational acceleration. The acceleration of an object in free fall under the influence of gravity. Expressed as the rate of increase in velocity per unit time, it is assigned a standard value of 980.665 centimeters per second per second.
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[Honors] Vector A points in the negative x direction and has a magnitude of 25 units. The Vector B points in the
positive y direction. Find the magnitude of B if A + B has a magnitude of 35 units
The magnitude of B if A + B has a magnitude of 35 units is 24.49 units.
On paper, operations involving coplanar vectors, including addition and subtraction, can be represented. In reality, vectors are simply straight lines with arrowheads that can be drawn quickly and easily on a flat surface using a few basic rules.
Vector A is along the x-axis and vector B is along +y axis. Thus 90 is the angle between A and B ,
given |A| = 25
|A + B| = 35
We know that resultant |R| = |A + B| = √(A^2 + B^2 + 2ABcos90°)
35 = √ 25^2 + B^2 + 0
35^2 = 25^2 + B^2
B = √35^2 - 25^2
B = √1225 - 625
B = √600
B = 24.49 units.
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N
5
+5 +11
B
10
To
20
D
30
Hint: Fine the slop for each line to determine the speed
time (sec)
40
A
G
10
4
On this graph, positive positions and directions of travel are considered to be North.
1. During which time interval (AB, BC, CD, DE, EF, FG) was the cart traveling at its greatest speed?
2. During which time interval(s) (AB, BC, CD, DE, EF, FG) was the cart at rest?
3. During which time interval(s) (AB, BC, CD, DE, EF, (FG) did the cart travel in a negative direction?
4. What was the cart's instantaneous speed at 6 seconds?
5. What was the cart's instantaneous speed at 22 seconds?
6. What was the cart's instantaneous speed at 40 seconds?
7. Describe the cart's behavior between 18 and 32 seconds. (location, speed, direction of travel, and distance traveled
Answer:
h
Explanation:
1) FG
Explanation:
During which time interval (AB, BC, CD, DE, EF, FG) was the cart traveling at its greatest speed?
Starting from rest at the center of a skating rink, the two skaters shown push off from each other over a time period of 1.2 seconds.
What is the force of the push by the smaller skater?
SEE PICTURE.
Answer:
100N
Explanation:
Just took test answer is 100n
if I have two forces pushing on an object 5n to the left and 10 N to the right, is this object balanced? why or why not?
Answer:
It is unbalanced
Explanation:
There are 5 more newtons of force being exerted toward the right.
anybody knows what's is diffraction of waves
Answer: the spreading of waves around obstacles
Explanation:
1)What is the difference between graphing constant speed and increasing acceleration?
2)What is the difference between graphing no speed and a change in velocity?
HELLPPP
In the graphing of constant speed, we get a plateau while when we graph increasing acceleration, we have a straight line graph
What is the speed?The term speed refers to the change in the position of an object with time. If the speed changes by equal amounts in equal time intervals then we could say that the object is undergoing uniform acceleration. If the speed does not increase by equal amounts in equal time intervals then the objects is not undergoing a uniform acceleration.'
Thus if we plot the speed of a body against the time taken, the slope of the graph is taken to be the acceleration of the body. If the plot of the speed against the acceleration is a straight line graph that had started from the origin of the graph then we have a case of uniform acceleration.
Thus, in the graphing of constant speed, we get a plateau while when we graph increasing acceleration, we have a straight line graph that starts from origin.
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