Answer:
reflection is the act of reflecting or the state of being reflected while echo is
reflection of sound waves from a surface back to the initial listener
An object begins with a speed of 20 meters per second and slows down to a speed of 10 meters per second over a time of 5 seconds. Calculate the average speed of the object during these 5 seconds.
can someone tell me how to do this please?
Answer:
V = 6 m/s
Explanation:
Given that,
Initial speed of an object is 20 m/s
Final speed of an object is 10 m/s
Time, t = 5 s
We need to find the average speed of the object during these 5 seconds. Let it is equal to V. Here, time is same. The average speed is given by :
[tex]V=\dfrac{x+y}{2}\\\\\text{Putting values}\\\\V=\dfrac{20+10}{5}\\\\V=6\ m/s[/tex]
So, the average speed of the object is 6 m/s.
Question 6 of 10
A car with a mass of 1,300 kg travels a distance of 200 m as it moves from
one stoplight to the next. At its fastest, the car travels at 20 m/s. What is its
kinetic energy at this point?
A. 520,000 J
B. 2,600 J
C. 260,000 J
D. 13,000 J
Answer: It is c.
Explanation:
260,000 J.
Answer:
C. 260,000
Explanation:
it's not that hard just do the work
i hope this helps
. You move at 3 m/s north, then at 5 m/s directly west.
Answer:
Explanation:
The question is incomplete. Here is the complete question.
You move at 3 m/s north, then at 5 m/s directly west. Find your displacement.
The displacement is the distance moved in a specified direction. If you first move 3m/s due to north, this means you moved in the positive y direction hence we can say that y = 3m/s. Then if you move 5m/s directly due west this means you moved in the negative x direction hence we can say that x = -5m/s. The displacement will be gotten using the pythagoras theorem as shown.
D² = x²+y²
D² = (-5)²+3²
D² = 25+9
D = √34 m/s
Hence your displacement is √34 m/s and the total distance covered is 3m/s + 5m/s = 8m/s
Assuming that the hill on the left will provide all of the potential energy for the ride, would this roller coaster actually make it around the loop?
Thanks!
No, this roller-coaster would not able to make it around the loop because the hill would need to be higher than the loop's highest part,
The potential energy stored in the roller coaster from the first hill is not sufficient to make around-the-loop.
What is mechanical energy?The sum of all the energy in motion (total kinetic energy) and all the energy that is stored in the system (total potential energy) is known as mechanical energy.
The expression for total mechanical energy can be given as follows
ME= PE + KE
The roller coaster would not be able to complete the loop because the hill would need to be higher than the highest point of the loop, and the potential energy stored in the roller coaster from the first hill would not be enough to complete the circle.
Therefore, the correct answer is option A.
Learn more about mechanical energy from here, refer to the link;
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Question 8
Four materials are put into small containers. These materials
are then moved from the small containers into larger
containers. Which material will spread out to completely fill
a larger container?
O air
oice
O sand
water
Answer:
Air
Explanation:
Matter exists in three states namely; solid, liquid and gas. These three states contain molecules/particles that behave differently from one another. The particles of gas are scattered in such a way that they move randomly in a fast motion. This causes the ability of gas particles to diffuse in an open space i.e. spread quickly
In the options of materials given in this question, AIR represents a gaseous substance, hence, it is made up of particles that move rapidly in a random manner. This will cause it to spread out (diffuse) to completely fill a larger container it is placed in.
Which statements accurately describe elements? Check all that apply
Answer:
Elements are made up of only one type of atom. Each element has a unique chemical symbol. Elements can be identified by their atomic number.
The heart belongs to which body system? nervous O cardiovascular O digestive O endocrine
Answer:
The heart belongs to the Cardiovascular system. Along with blood vessels and the blood.
What disadvantage does floating buoys have when it comes to converting wave energy to electrical energy? A) They generate only minimum amounts of electricity. B) They pose a risk to migrating whales in the ocean. C) They are easily degraded by the salt water. D) The turbulent ocean often breaks these buoys. Grade Results got me messed up my dudes.
Answer:
B
Explanation:
Examples of increase in pressure due to increase in applied force
Answer:
injecting
Explanation:
Christina drives his moped 7 kilometers North. She stops for lunch and then drives 5 kilometers East. What distance did she cover? Please include the number and unit. 8.6 km What was the magnitude of her displacement? Please include the number and unit. What was the direction of her displacement? Please abbrieviate (N, S, E, W, etc.)
Answer:
She covers the distance is 12 km.
The magnitude of displacement is 8.6 km.
The direction of her displacement is north east.
Explanation:
Given that,
Christina drives his moped 7 kilometers North and stop for lunch and then drive 5 km east.
We need to calculate the total distance
Using formula of distance
[tex]d=d_{1}+d_{2}[/tex]
Put the value into the formula
[tex]d=7+5[/tex]
[tex]d=12\ km[/tex]
We need to calculate the magnitude of displacement
Using formula of displacement
[tex]D=xi+yj[/tex]
[tex]D=5i+7j[/tex]
[tex]D=\sqrt{5^2+7^2}[/tex]
[tex]D= 8.6\ km[/tex]
The direction of her displacement is north east.
Hence, She covers the distance is 12 km.
The magnitude of displacement is 8.6 km.
The direction of her displacement is north east.
An airplane is trying to land on the runway using the path below. Vectors and Scalars Questions – NAT 5 What is the total distance traveled by the airplane? m What was the magnitude of the airplane's displacement? m What was the direction of the airplane's displacement? Please abbreviate
Explanation:
The attached image shows the path followed by an airplane that is trying to land. From the figure, it can be seen that initially, its position was 200 m due east, then 150 m due south, 200 m due west, 250 m due south.
(a) The total path covered during its entire journey is called distance.
D = 200 m+150 m+200 m+250 m
D = 800 m
(b) The shortest path covered by an object is called displacement of an object. The shortest path covered is shown by red color. It means that displacement is (150+250) m = 400 m
(c) It is clear from the figure that, the Airplane's displacement is in the south direction.
A satellite’s original velocity is 10,000 m/s. After 60 seconds it s going 5,000 m/s. What is the acceleration? Remember acceleration = (final speed – initial speed) ÷ time .
(p.s i think this is physics? i don't know i just know its science so if anyone can help with this it would be greatly appreciated)
Explanation:
Given that,
Orginal speed, u = 10,000 m/s
Final speed, v = 5,000 m/s
Time, t = 60 s
To find,
Acceleration of the satellite.
The acceleration of an object is equal to the change in its speed divided by time. So,
[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{5000-10000}{60}\\\\a=-83.34\ m/s^2[/tex]
So, the acceleration of the satellite is [tex]83.34\ m/s^2[/tex] and it is deaccelerating.
Which option is a potential environmental benefit of adopting a new
technology?
Answer:New technology can provide cleaner energy for the environment
Can also help clean the environment.
Explanation:
Which option is potentially environmental benefit of adopting a new technology?
Convert 2.5 MM to micrometers
Please show an explanation.
Answer:
2500 micrometers.
Explanation:
When ever it comes to converting a value into micrometers, you just multiply the length value by 1000.
7. Mrs. Everhart developed the theory that all bulldogs are great pets. After all her bulldog Meatball is a
wonderful dog! Is this statement a scientific theory? Why or why not.
finoccientific method
Answer: No.
Explanation:
A scientific theory is an explanation of some aspect of the natural world that can be tested several times, and follows the scientific method. And, when possible, theories are tested with experiments.
Now, a scientific theory must meet some criteria, and one of those is that it must be supported by several (and independent) strands of evidence.
In this case, we have only one, Meatball, and it is not enough, then it can not be a scientific theory.
A new born baby weights 7.15 lbs how many meters is that
Answer: 114.543 i think
15. Write down your height in feet and inches):
a. Determine your height in inches.
I
b. Determine your height in centimeters.
c. Determine your height in yards.
Answer:
example 5foot 5in
a)65
b)165.1
c) 1.83
Explanation:
a) multiply the amount of feet by 12. thats 60. then add the extra 5 inches. 65 inches in total.
b) multiply your previous answer by 2.54. (there are 2.54 centimeters for every inch) the answer is 165.1
c) a yard is three feet. divide 5foot 5 by 3.
A remote-controlled, pilot-operated ___ valve is type of pilot-operated relief valve that uses one or more external pilot valves to set the pressure at which the relief valve will open.
Answer:
A remote-controlled, pilot-operated _Relief__ valve is type of pilot-operated relief valve that uses one or more external pilot valves to set the pressure at which the relief valve will open.
What is the kinetic energy of a 7.56 kg bowling ball that is rolling at a speed of 2 m/s ?
Answer:
K.E=?
Mass=7.56 kg
Velocity=2m/s
Solution::
K.E = 1/2mv^2
K.E=0.5*7.56*(2)^2
K.E= 0.5*7.56*4
K.E=15.12 joules.
(3.8 × 10−6)(2.37 × 10−3)
Answer:
0.000000009006 or 9.006 x 10^-9
Explanation:
0.0000038 x 0.00237 = 0.000000009006 or 9.006 x 10^-9
A girl rides her moped 5.0 km east and then turns around and rides 2.0 km west. The entire trip takes 15 minutes. What are her average speed and velocity?
Answer; lol im taking that physics exam as well, a m f confused i cant find the answers on the internet
Explanation: #ripaldinepride
A cannonball is fired horizontally at the same time a ball being dropped from the same height How do the times it takes them to hit the ground compare?
Answer:
The cannonball and the ball will both take the same amount of time before they hit the ground.
Explanation:
For a ball fired horizontally from a given height, there is only a vertical acceleration on it towards the ground. This acceleration is equal to the acceleration due to gravity (g = 9.81 m/s^2). A ball dropped from a height will also only experience the same vertical acceleration downwards which is also equal to g = 9.81 m/s^2.
Therefore both the cannonball and the ball will take the same amount of time to hit the ground if they are released/fired from the same height.
Convert 459 L into milliliters
When performing a cranking sound diagnosis, Technician A says that all engines may be prevented from starting by holding the throttle wide open while cranking. Technician B says that an engine may be disabled by removing the fuel pump fuse or relay (if equipped). Who is correct?
Answer:
Technician B
Explanation:
An engine can be disabled by removing the fuel pump fuse or relay if equipped. Therefore, Technician B is correct.
What can make an engine stop working?Engines generally stop suddenly if they suffer from a lack of fuel or sparks. An engine that can stop dead without prior warning and has probably had an instant ignition failure although when it locks solid it's more probably to have seized.
There are two ways to stop a diesel engine, remove the fuel pump fuse or cut off the fuel or the air. The easy way to stop a boat engine is to cut off the air.
The most general reasons for poor engine combustion because of broken valve seals, overused piston rings, holes within cylinders, and forcing air to leak out.
Assuming it's a gasoline-powered vehicle when removing a fuse or breaker for the ignition or fuel injection, the car wouldn't start. An engine can be disabled by cutting off the fuel pump fuse or relay if equipped.
Learn more about engine, here:
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Which of the following . is a result of the transfer of energy?
A
gravity
B
sound
с
magnetis
D
matter
Answer:
magenicts sshbsunuwi
Explanation:
Option B (Sound) is the appropriate choice.
There are surface and groundwater vibrations that cause individual eardrums to vibrate, causing the sensory organ to be felt, which is considered as a Sound.
The other given alternatives such as:
Gravity - A force that seeks to bring two items together, is gravity. Gravitational influence is a property of all objects with weight.
Magnetism - Magnetism seems to be the force that magnetically exerts whenever they approach as well as repelled each other.
Matter - Material or materials from which a thing is usually made, is a matter.
These three choices are not related to the given question. Thus the above is the right answer.
Learn more about the sound here:
https://brainly.com/question/17398557
It takes a person 22 seconds to swim in a straight line from the south end of
a pool to the north end of the pool, a distance of 28 meters. What is the
swimmer's velocity?
Answer:
1.27 m/s.
Explanation:
The following data were obtained from the question:
Displacement (D) = 28 m
Time (t) = 22 secs
Velocity (v) =?
Velocity is simply defined as the rate of change of displacement of an object with time. It can be represented mathematically as:
Velocity (v) = Displacement (D) /Time (t)
v = D/t
With the above formula, we can obtain the swimmer's velocity as follow:
Displacement (D) = 28 m
Time (t) = 22 secs
Velocity (v) =?
v = D/t
v = 28/22
v = 1.27 m/s
Therefore, the swimmer's velocity is 1.27 m/s.
Answer:
1.3 m/s north
Explanation:
According to cell theory, where do new cells come from?
Choose 1 answer:
(Choice A) A Carbohydrate evolution
(Choice B) B Cell division
(Choice C) C Spontaneous generation
(Choice D) D Cell fusion
Answer:
B
Explanation:
New cells come from something called cell division
Answer:
Cell division
Explanation:
If a car races around a 2.3 mile oval track 220 times, what is the displacement of the car in meters when it crosses the finish line.
Answer: 0 miles.
Explanation:
First let's define what the displacement is:
The displacement is defined as the difference between the final position and the initial position.
So, if for example, you start at your house, then go to a store, and then go back to your house, your total displacement will be zero, because the initial position and the final position are the same.
Then when the car reaches the final line, it will be in the same place that it started (because this is an oval track, so the finish line connects with the starting point)
Then the total displacement is 0miles.
Scientist Jordan makes a discovery and publishes the results for other scientists to read. Scientist Leesha tries to repeat the experiment and cannot make it work. Her results are also published. Scientist Jordan looks at his data again and finds that the discovery only works under certain conditions. He publishes the change. Now scientist Leesha repeats the new method and finds the same results as Jordan, but another scientist, Winslow, gets different results. What does this story demonstrate? A. that scientific knowledge is impossible to obtain B. that scientific knowledge results from a lot of debate and confirmation C. that scientific knowledge is developed by individual scientists in isolation D. that scientists are really good at arguing
Answer:
Answer choice B!
Explanation:
Study Island work
Answer:A
I DID THIS ON STUDYILSLAND
A swimmer swims a half lap, moving from the left end to the right end of a pool that is 50 meters long. What is the Distance and Displacement?
Distance = 50m
Displacement = 50m to the right
Explanation:Distance is the total length of a given path. It is a scalar quantity and thus takes no consideration on the direction of the path.
Displacement on the other hand is the change in position of an object. It is a vector quantity and takes consideration on the direction of the object.
From the question:
The swimmer swims half lap by moving from the left end to the right end of a pool that is 50m long.
Distance = total length of the given path = 50m
Displacement = change in position of the swimmer from the left end (0m) to the right end (50m) = 50 - 0 = 50m
Since direction is important in displacement, the complete details of the displacement should be 50m to the right
Answer:
The distance is 50m and the displacement is also 50 m
Explanation:
the swimmer traveled 50m =distance
the swimmer was now 50m away from the start=displacement