Answer:
B. Design tests to measure and compare the energy released by
earthquakes
1.020 please help!!
Mark brainliest
Answer:
0.0035 mg
Explanation:
1 mcg = 1e-3 mg
》35 mcg = 35×10^-3 mg
= 0.0035 mg
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
A cheetah can maintain its maximum speed of 100 km/hr for 30.0 seconds. What minimum distance must a gazelle running 80.0 km/hr be ahead of the cheetah to escape?
Explanation:
Suppose the cheetah is initially positioned at x=0 (m) from the reference, and the gazelle is intially at poisiton x=d (m).
Then, at the worst case, that is when cheetah is running at the maximum case, the position of the gazelle relative to the reference must be larger than that of cheetah.
In equation form,
[tex]0\text{ km}+\frac{100\text{ km}}{1 \text{ hr}}\cdot30\text{ s }\cdot\frac{1\text{ hr}}{3600\text{ s}}\le d \text{ km}+\frac{80\text{ km}}{1 \text{ hr}}\cdot30\text{ s }\cdot\frac{1\text{ hr}}{3600\text{ s}}[/tex]
[tex](100-80)\cdot \frac{30}{3600}\le d[/tex]
[tex]d\ge \frac16\text{ km}=166.66 \text{m}[/tex]
The minimum distance that a gazelle running 80.0 km/hr be ahead of the cheetah to escape is 6.5807km
If a cheetah can maintain its maximum speed of 100 km/hr for 30.0 seconds, the distance covered by the cheetah is expressed as:
Distance = Speed * time
Given the following:
Speed = 100km/hrTime = 30secs = 0.00833333hrDistance covered = 100 * 0.00833333
Distance covered = 0.0833 km
If gazelle is running at a speed of 80.0km/hr, the distance of gazelle will be expressed as:
Distance of gazelle = 80 * 0.08333Distance covered by gazelle = 6.6664kmTaking the difference in distance = 6.6664km - 0.0833 km =6.5807km
Hence the minimum distance that a gazelle running 80.0 km/hr be ahead of the cheetah to escape is 6.5807km
Learn more on speed here: https://brainly.com/question/24732604
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=1512J12
The motion of an object can be described by it
A.
speed.
В.
position.
C.
direction.
D.
all of these
Answer:
D
Explanation:
The motion of an object can be described by its speed, position, and direction so its all of the above
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? ..............
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
3. 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
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)
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
Every mass exerts a gravitational force on every other mass.
a. True
b. False
Answer:
A
Explanation:
newton's law of universal gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses
Convert the following in to SI units without changing its values
a. 4000 g
b. 2.4 km
Plz help. I will make you a brailyest and 10,000 $
Answer:
4000g
Thank You
Hope it helps
Answer:
a 4 kg
b 2400 meter
Explanation:
International system of units Sl
the units are
kelvin for temperatures
meter for distance
Ampere for electric current
Second for time
Kg for mass
...etc
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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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.
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.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:
what is third law of motion
[tex] \huge \fbox \colorbox{teal}{ANSWER:-}[/tex]
Newton's Third Law of Motion states: 'To every action there is an equal and opposite reaction'. ... The Third Law of Motion indicates that when one object exerts a force on another object, the second object instantaneously exerts a force back on the first object.
Which of the following must an engineer take into account when designing a roller coaster?
the mass of the roller coaster
the rates at which the roller coaster will change directions
the total mass of the people that will ride the roller coaster
the acceleration of the roller coaster due to gravity
Answer:
Explanation:
All of the above.
Certainly a coaster could be designed without considering any one item of mass, gravity, or rates of direction change, but the success of the ride would be highly suspect.
Ignoring mass (of cars and/or riders) could lead to support members not being strong enough.
Ignoring rates of change of direction could lead to support members not being strong enough or make the forces on the riders uncomfortable.
Ignoring gravity could lead to support members not being strong enough or make the forces on the riders uncomfortable.
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]
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
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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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
convert 300mil per hr to km per hr
Answer: 482.8032 km per hr
Explanation: 300 * 1.609344 =
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:
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
Which do solar flares and coronal mass ejections have in common?
please help me, i need to show my work but im dont know how
Which object is not accelerating?
A A baseball player sliding into home base.
B A blue Ford 150 pick-up truck speeding up from 50 mph to 80 mph.
C A ladybug crawling forward at constant rate of 2.5 m/s.
D A student riding on a Ferris wheel at a constant rate of 5.0 m/s.
C. The ladybug's speed and direction are not changing, so she has no acceleration.
In A, B, and D, either speed or direction are changing, and that's acceleration.
