why pet cats are not called Panthera Cantus.
Panthera is a genus within the family Felidae that was named and described by Lorenz Oken in 1816 who placed all the spotted cats in this group.
Item 4 A student conducts an experiment to determine how the temperature of water affects the time for sugar to dissolve. In each trial, the student uses a different amount of sugar and a different temperature of water. What is wrong with this experimental design? A.The student did not change enough variables. b.The student does not have a dependent variable. C.The student changed too many variables. D. The student needs to perform more trials.
Answer:
The Answer is C. the student changed too many variables.
Explanation:
For the quiz in K12
A train accelerates from rest and covers a distance of 600m in 20s. What is the train's speed at the end of 20s? What is the final velocity of the train after 20s?
Answer:
v = 60 m/s
final velocity after 20 seconds depends on how long it continues to accelerate after 20 seconds. Also we do not know the direction to complete the velocity requirements of a scalar value and direction component.
Explanation:
If we assume that the acceleration is constant
d = ½at² = ½(Δv/t)t² = ½Δvt = ½(v - 0)t = ½vt
v = 2d/t
v = 2(600)/20 = 60m/s
A car, initially traveling 28.0ft/s, steadily speeds up to 50.0ft/s in 7.40s. Determine all unknowns and answer the following question.
How far did the car travel during this time?
Explanation:
Given:
[tex]v_0 = 28.0\:\text{ft/s}[/tex]
[tex]v = 50.0\:\text{ft/s}[/tex]
[tex]t = 7.40\:\text{s}[/tex]
First, we calculate the acceleration of the car during this time:
[tex]v = v_0 + at \Rightarrow a = \dfrac{v - v_0}{t}[/tex]
Plugging in the given values, we get
[tex]a = \dfrac{50.0\:\text{ft/s} - 28.0\:\text{ft/s}}{7.40\:\text{s}} = 2.97\:\text{ft/s}^2[/tex]
Now that we have the value for the acceleration, we can solve for the distance traveled during the time t:
[tex]x = v_0t + \frac{1}{2}at^2[/tex]
[tex]\:\:\:\:=(28.0\:\text{ft/s})(7.40\:\text{s})[/tex]
[tex]\:\:\:\:\:\:\:\:\:\:\:\:+ \frac{1}{2}(2.97\:\text{ft/s}^2)(7.40\:\text{s})^2[/tex]
[tex]\:\:\:\:= 289\:\text{ft}[/tex]
The two ends of a coiled wire are connected to the electrodes of a lightbulb.
How does the bar magnet induce a current in the wire?
NS
A. Moving the bar magnet back and forth along the axis of the coil
induces a current in the wire.
B. Placing the bar magnet parallel to the axis and inside the coil
induces a current in the wire.
C. Placing the bar magnet at 90° to the axis of the coil induces a
current in the wire.
O
D. Moving the bar magnet in a circle around the lightbulb induces a
current in the wire.
Answer:
a
Explanation:
The bar magnet moves downward with respect to the wire loop, so that the number of magnetic field lines going through the loop decreases with time. This causes an emf to be induced in the loop, creating an electric current.
in other words, the magnets motion creates a current in the loop
Answer:
A?
Explanation:
A world-class tennis player can serve a tennis ball at 150 mi/h (about 67 m/s). The length of a tennis
court is 78 ft. Approximately how long does an opponent have to react from the instant the ball is served
until the ball reaches the opponent?
Answer:
The expression for the time taken by an object to move with a speed at some distance is,
t= d/v
Here, t is the time taken by the opponent to react, d is the length of the court, andis the speed of the ball.
Explanation:
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A car accelerates from rest to 100 m/s in 20 s. What is its acceleration?
[tex]\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}[/tex]
[tex]\\ \sf\longmapsto Acceleration=\dfrac{100-0}{20}[/tex]
[tex]\\ \sf\longmapsto Acceleration=\dfrac{100}{20}[/tex]
[tex]\\ \sf\longmapsto Acceleration=5m/s^2[/tex]
Answer:
[tex]initial \: velocity \: = 0 \\ final \: velocity \: 100 \frac{m}{s} \\ time = 20 \\ here \: we \: want \: to \: find \: accelaration \\ accelaration \: = \frac{final \: velocity - initial \: velocity}{time} \\ accelaration \: = \frac{100 - 0}{20} = \frac{100}{20} = 5 \frac{m}{ {s}^{2} } \\ thank \: you[/tex]
State the Newton's formulas of motion
Answer:
Newton's second law, which states that the force F acting on a body is equal to the mass m of the body multiplied by the acceleration a of its centre of mass, F = ma, is the basic equation of motion in classical mechanics. ...
Explanation:
Newton's second law, which states that the force F acting on a body is equal to the mass m of the body multiplied by the acceleration a of its centre of mass, F = ma, is the basic equation of motion in classical mechanics.
How long does it take a person to skate the width of a hockey rink (85 feet) at
a constant speed of 15 feet per second?
O A. 8.8 seconds
O
B. 4.3 seconds
O C. 6.5 seconds
O D. 5.7 seconds
Answer:
85 ft / 15 ft/s = 5.666666... = 5.7 s
Explanation:
I need help in this pls i really need a answer
Answer:
In terms of distance, average speed is 20 km/h
In terms of displacement, average speed is 0 km/h.
Explanation:
Total distance:
[tex] = (40.0 - 10.0) + (20.0 - 10.0) + (40.0 - 20.0) \\ = 30.0 + 10.0 + 20.0 \\ = 60.0 \: km[/tex]
Total time is 3.0 hours
but:
[tex]average \: speed = \frac{total \: distance}{total \: time} \\ [/tex]
In terms of distance.
substitute:
[tex]average \: speed = \frac{60.0}{3.0} \\ \\ = 20 \: {kmh}^{ - 1} [/tex]
[tex]displacement = ( - 30.0) + 10 .0+ 20.0 \\ = 0[/tex]
In terms of displacement:
[tex]speed = \frac{0}{3} \\ \\ = 0 \: {kmh}^{ - 1} [/tex]
the temperature of a substance depends on what two types of energy
Answer:
Thermal and kinetic.
Explanation:
Thermal energy is the energy generated by heat. Kinetic energy is the movement of particles in a substance which is responsible for the heat increase.
Answer:Thermal and kinetic.
Explanation:
convert 300mil per hr to km per hr
Answer: 482.8032 km per hr
Explanation: 300 * 1.609344 =
Một vật nhỏ khối lượng m = 200g được treo vào một lò xo khối lượng không đáng kể, độ cứng k = 80N/m. Kích thích để con lắc dao động điều hoà(bỏ qua các lực ma sát) với cơ năng bằng 6,4.10-2J. Gia tốc cực đại và vận tốc cực đại của vật lần lượt là
Explanation:
what is this language? ..............
Find the magnitude of momentum of a body of mass 10 kg moving with a velocity of 5 m/s.
20 kg m/s
50 kg m/s
70 kg m/s
50 kg m/s^2
Explanation:
Formula for momentum
P=mv
= 10 x 5
= 50kg m/s
Answer:
50Kg m/s
Explanation:
the equation for momentum is mass x velosity
HELP PLEASE
I think it’s B but I could be wrong. Please help!
What is the goal of a theory?
B. To analyze data from an experiment
D. To control the outcome of an experiment
Option C,
The goal of a theory is to explain natural and physical phenomena.
Hope it helps you...
Pls mark brainliest if it helps you...
(Answered by Benjemin)
1.7 A7V battery delivers a 0.6 A current to an electric motor connected across its terminals . a) What power is delivered to the motor? b) If the motor runs for 6 minutes, how much electric energy is delivered to the motor?
Answer:
P=4.2V E=1512J
Explanation:
P=?
P=VI
Putting the values
P=2*0.6
P=4.2VE=?
E=P*t
E=4.2*6*60
E=1512J3. A driver who is moving at 15 m/s, sees a stop light and puts on the brakes 30 m before an intersection. a) What acceleration will the driver have to have to stop before entering the intersection? b) How much time will it take to stop the car?
Please find attached photograph for your answer. Hope it helps! Please do comment
Convert 3 cubic (cu.) yards to cubic (cu.) meters
(1 cubic yard = .76 cubic meters)
O 6.4 cubic meters
O 14 cubic meters
O 2.29 cubic meters
why can't we attain the speed of light c ?
For centuries, physicists thought there was no limit to how fast an object could travel. ... Only massless particles, including photons, which make up light, can travel at that speed. It's impossible to accelerate any material object up to the speed of light because it would take an infinite amount of energy to do so.
hope it is helpful to you ❤️
The graph below shows the position of an ant as it crawls over a flat picnic blanket. The total time for the ant to go from the start to the end position takes 1 minute and 45 seconds.
What is the average speed and average velocity of the ant?
A.) Average speed is 0.200 cm/s and average velocity is 0.0988 cm/s to the upper right.
B.) Average speed is 0.152 cm/s and average velocity is 0.910 cm/s to the upper right.
C.) Average speed is 0.975 cm/s and average velocity is 1.95 cm/s to the upper right.
D.) Average speed is 0.276 cm/s and average velocity is 0.136 cm/s to the upper right.
The average speed of the ant is 0.276 cm/s and the average velocity is 0.136 cm/s.
The correct answer is option D.
In the given graph, we can deduce the following;
the total time of the motion, = 1 mins + 45 s = 60 s + 45 s = 105 sThe average speed of the ant is calculated as;
[tex]average \ speed = \frac{total \ distance }{total \ time }[/tex]
The total distance from the graph is calculated as follows;
first horizontal distance from 2 cm to 8 cm = 8 - 2 = 6 cmfirst upward distance from 3 cm to 5 cm = 5 - 3 = 2 cmsecond horizontal distance from 8 cm to 6 cm = 8 - 6 = 2 cmsecond upward distance from 5 cm to 12 cm = 12 - 5 = 7 cmthird horizontal distance from 6 cm to 13 cm = 13 - 6 = 7 cmfourth downward distance from 12 cm to 9 cm = 3 cmfinal horizontal distance from 13 cm to 15 cm = 2cmThe total distance = (6 + 2 + 2 + 7 + 7 + 3 + 2) cm = 29 cm
[tex]average \ speed = \frac{total \ distance }{total \ time } = \frac{29 \ cm}{105 \ s} = 0.276 \ cm/s[/tex]
The average velocity is calculated as the change in displacement per change in time.
The displacement is the shortest distance between the start and end positions.
This shortest distance is the straight line connecting the start and end position. Call this line PFrom the end position at x = 15 cm, draw a vertical line from y = 9 cm, to y = 3 cm. The displacement = 9 cm - 3 cm = 6 cmAlso, draw a horizontal line from start at x = 2 cm to x = 15 cm. The displacement = 15 cm - 2 cm = 13 cmNotice, you have a right triangle, now calculate the length of line P.
↓end
↓
↓ 6cm
↓
start -------------13 cm------------
Use Pythagoras theorem to solve for P.
[tex]P^2 = 6^2 + 13^2\\\\P^2 = 36 + 169\\\\P^2 = 205\\\\P= \sqrt{205} \\\\P = 14.318 \ cm[/tex]
The average velocity of the ant is calculated as;
[tex]average \ velocity= \frac{\Delta displacemnt }{total\ time }= \frac{14.318 \ cm}{105 \ s} = 0.136 \ cm/s \\\\[/tex]
Thus, the average speed of the ant is 0.276 cm/s and the average velocity is 0.136 cm/s.
Learn more here: https://brainly.com/question/589950
1. The stone thrown towards sky always falls down,why?
2. How is the frictional force produced?
3. Why the stone moves away when the string is broken during rotation?
4. How can we show the magnetic force on a magnet? Illustrate with examples
Answer:
1.because of gravitational force.
2.By rubbing hands.
Explanation:
3.When the string breaks the stone no longer rotates around its center of rotation, but won't suddenly move directly away from it, and will instead continue to follow its path of inertia. That is, it will continue to move in the direction in which it was moving at the moment the string broke.
what is kinematics ???
what is it concerned with ??
Kinematics deals with the motion and time
It is concerned with motion
[tex] \huge \boxed{\mathfrak{Question} \downarrow}[/tex]
What's kinematics? What is it concerned with?[tex] \huge \boxed{\mathfrak{Answer} \downarrow}[/tex]
Kinematics is a branch of mechanical physics that deals with motion. It includes all types of motion & all ways of showing motion (like, through graphs, moving objects & so on). In short kinematics is the => geometry of motion.Why did mathematicians and scientists begin formulating game theory for use in economics? (1 point)
The gaming approach had been successfully applied in other fields.
They expected people to continue playing games for millennia.
O Mathematics alone could not account for human behavior.
O Science and mathematics were no longer applicable.
it is the short method of calculating economics
4 x10^4
---------------
3.63 x 10^-4
O 1.10 x 10^8
O 2.36 x 10^-8
O 2.36 x 10^-3
A car traveling at 90 m/s can stop in a distance of 110 m. What is the magnitude of the cars acceleration as it slows down?
Please find attached photograph for your answer. Hope it helps! Please do comment
You have three flowers. You give
each a different amount of
water. What is one of the
possible controlled variables?
Answer:
flowers
Explanation:
flowers cannot change
find the final velocity of the initial velocity of 8m/s with an acceleration of 7 m/s2 over 3 second interval
Please find attached photograph for your answer. Hope it helps! Please do comment.
what are two reasons why mercury rather than water is used in barometers?
Answer:
Does not stick to glass, expands uniformly when heated
Explanation:
If u want some more
Good conductor of heat
Low freezing point : - 39°C
High boiling point : 357°C
Have a good day, hope I helped
If you toss a ball straight upward at 40 m/s with no air resistance, what will be its speed 2 seconds later?
Explain Your answer!
Answer:
the speed after 2 seconds = 20m/s
Explanation:
I took g as -10m/s² because the ball was moving against gravity
using V = u + gt
V = 40 - 10 X 2
V = 40 - 20
V = 20m/s
The velocity after 2 seconds later will be 20.38 m/s.
What is velocity?Velocity is the rate of distance covered per time. Velocity could be average or instantaneous.
Average velocity can be given as;
Average velocity = total distance / total time taken
Velocity has a huge amount of application in science and technology.
Units of velocity are given by ⇒ meter/second
The kinetic energy of an object is caused due to velocity only.
For example, if a car drives 50 meters for 10 seconds and it is constant then 50/10 = 5 meters/second will be the velocity.
Given that,
Initial velocity u = 40 m/s
Time period t = 2 seconds
By newtons first equation of motion
v = u - gt ( since acceleration is upward)
v = 40 - 9.81 × 2
v = 40 - 19.62
v = 20.38 m/s
Hence "The velocity after 2 seconds later will be 20.38 m/s".
To learn more about velocity,
brainly.com/question/18084516
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Which of the following best represents R=A+B ?
A)
B)
C)
Answer:
C
Explanation:
Options A and B are not even pointing in the direction as the vectors in the question so they shouldn't even be considered.
Option C looks like the closes since vectors A and B are pointing in a similar direction (negative x-axis)
The best representation for the resultant vector representing the resultant R=A+B would be option C because the result is represented by the closing side of the triangle, therefore the correct answer would be C.
What is a vector quantity?The quantities that contain the magnitude of the quantities along with the direction are known as the vector quantities.
Examples of vector quantities are displacement, velocity acceleration, force, etc.
As given in the problem we have to find out the resultant vector from the sum of vector A and vector B,
The resultant of the vector can be calculated with the help of the triangle law of the vector addition in which the sum is given by the closing side of the triangle.
Thus, the correct answer is option C.
To learn more about the vector quantity here, refer to the link;
https://brainly.com/question/15516363
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