Answer:
Aristarchus of samos
Explanation:
Aristarchus was a great scientist in ancient world He first proved the universe by his heliocentric modelAnswer:
C. Aristarchus of Samos
Explanation:
Aristarchus created the first known heliocentric model of the Solar System. He also thought stars were other bodies like the sun, but much farther away.
what is practical machine?
Explanation:
A practical machine is a simple machine that losses energy and have parts that have weights, friction and it causes some loss of work done.
What is the name of the distance that is 103 larger than a meter
Answer:
kilometer
Explanation:
kilometer is larger than the meter
a planes average speed between two cities is 600 km/hr. if he takes 2.5 hrs. how far does the plane fly
Answer:
1500 hr
..............
A scientist adds different amounts of salt to 5 bottles of water. She then
measures how long it takes for the water to boil. What is the responding
variable in this experiment?
O A. The time it takes for the water to boil
O B. The amount of salt added to the water
C. The kind of bottles used
D. The brand of salt used
Answer:
A. The time it takes for the water to boil
It is because salt was added into the water. So the responding variable is the time taken to boil the water.
hope this help u. good luck
What happens to acceleration when mass is increased
Answer: acceleration will slow down.
Explanation: Since mass is inversely proportional to acceleration, if you increase the mass at a given force the rate of acceleration slows.
.Roshan applied a force of 144 N to the side of a cube-shaped wooden block to slide it away from himself . Assuming that he applied the force on the entire surface of the side of the cube , each side measuring 4cm , what was the magnitude of pressure applied on the said surface ?
Area=side^2=4^2=16cm^2=0.0016m^2
Force=144N[tex]\\ \sf\longmapsto Pressure=\dfrac{Force}{Area}[/tex]
[tex]\\ \sf\longmapsto Pressure=\dfrac{144}{0.0016}[/tex]
[tex]\\ \sf\longmapsto Pressure=90000Pa[/tex]
This question can simply be solved by the use of the basic formula of pressure.
The magnitude of pressure applied on the surface is "90000 Pa" (OR) "90 KPa".
The pressure is defined as the force applied per unit area in the normal direction. The pressure applied on a surface can be given by the following formula:
[tex]Pressure=\frac{Force}{Area}\\\\Pressure=\frac{144\ N}{(0.04\ m)^2}[/tex]
where,
Area of Square Surface = Side² = (0.04 m)²
Therefore,
Pressure = 90000 Pa = 90 KPa
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The attached picture shows pressure.
Speed depends on how far something travels and
Question 1:
Answer: I think the answer is C
What is a description for this lionfish?
the lionfish, a longstanding showstopper in home aquariums, is a flourishing invasive species in U.S. Southeast and Caribbean coastal waters. This invasive species has the potential to harm reef ecosystems because it is a top predator that competes for food and space with overfished native stocks such as snapper and grouper. Scientists fear that lionfish will also kill off helpful species such as algae-eating parrotfish, allowing seaweed to overtake the reefs. In the U.S., the lionfish population is continuing to grow and increase its range. This is largely because lionfish have no known predators and reproduce all year long; a mature female releases roughly two million eggs a year.
help please! this is physics !
Answer:
4. The choose b. 0.000355
Ans; 3.55× 10-⁴ = 0.000355
5. The choose C. 80600
Ans; 8.06 ×10⁴= 806×10² = 80600
I hope I helped you^_^
thank you in advance
[tex]m1 = \frac{- v2m2 - m2v1}{v2 - v1} [/tex]
A bicycle starts at 50 m from an intersection. ten seconds later the bicycle is 85 m from the same intersection what is the slope of the bicycles position versus time graph 5 s after it starts assume constant velocity motion
Answer:
use the formula of slope=(x₂-x₁)/(y₂-y₁)
Explanation:
The slope of the bicycle's position versus time graph 5 s after it starts to assume constant velocity motion would be 7 meters/second.
What is Velocity?The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.
velocity slope =change in the position of the object /change in time
As given in the problem a bicycle starts at 50 m from an intersection. ten seconds later the bicycle is 85 m from the same intersection,
change in the position of the bicycle = 85-50
= 35 meters
change in the time = 10 -5 seconds
= 5 seconds
slope = 35 meters/5 seconds
= 7 meters/second
Thus, the slope of the bicycle's position versus the time graph would be 7 meters/second.
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A student drops a rock off a 5.0 meter cliff. If we ignore air resistance, how long will it take the rock to strike the water below?
Answer:
0.71 s
Explanation:
The formula used will be the formula for a free falling object acted on by gravity.
Time/Period(T) = √[Length/Distance(L)]/[Acc'n due
to gravity(g)]
T = √[5m/9.8m/s²]
T = 0.71 s
Which two types of energy does a book have as it falls to the floor?
A. Kinetic energy
B. Nuclear energy
C. Light energy
D. Magnetic energy
E. Potential energy
Answer:
A and E
Explanation:
because of gravitational pull
Answer:
Its A and E :))
Explanation:
In physics, what is the positive and negative sign used for when applied to velocity and acceleration?
Answer:
the positive and negative signs are used to show different directions of acceleration and velocity
Explanation:
for example, if a car was moving forward, you would usually express it with a positive sign. If the car started moving backwards, you would show that backwards motion with a negative sign.
Air Rockets can be a fun way of investigating forces. When a air rocket is launched compressed air
forces the cardboard rocket off the launcher and up into the air.
• Name the forces acting on the rocket at the top of it's flight.
. Are the forces at the top of the flight balenced or unbalenced?
• Describe how the size and direction of the air resistance force changes during flight, an state
the definition of friction.
Which velocity graph shows the car moving toward the right (away from the origin) at a steady (constant) velocity? 
Explanation:
[tex]\text{Velocity is defined as the average displacement per unit time.}[/tex]
[tex]\text{Since the car is moving at a steady velocity, the velocity does not change over time, it shows a horizontal line on the }v-t\text{ graph}[/tex]
[tex]\text{Therefore, only option 2,5,8 matches this requirement.}[/tex]
[tex]\text{Since the car is moving to the right, which is defined as the positive direction in this question, the velocity (}v\text{) is also positive.}[/tex]
[tex]\text{Therefore, only option 5 is correct.}[/tex]
The graph marked with number [5] is the correct graph.
We have a Car.
We have to select the graph which shows that the car is moving toward the right (away from the origin) at a steady (constant) velocity.
What is the acceleration of body moving with constant velocity ?The acceleration of the body at constant velocity is 0.
According to the question -
For constant velocity, the acceleration of the car will be zero. Now, if we plot the velocity - time graph for this motion considering that the car is moving away from the origin, then the graph marked with number [5] will be the correct choice since the velocity is constant (say v) throughout the time and the motion is along right of origin.
Hence, the graph marked with number [5] is the correct graph.
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What is the manipulated variable?
Answer:
ore specifically, in an experiment, a variable can cause something to change, be the result of something that changed, or be controlled so it has no effect on anything. Variables that cause something to change are called independent variables or manipulated variables.
Explanation:
Plz answer this question
The answer will be pressure.
Pressure is force per unit area.
Which of the following is an example of a vector quantity
A) a student walks 2.0km north
B) an object has a mass of 10.5 kg
C) A 1.0 kg object moves at 18 m/s
D) a ball has an instantaneous speed of 15 m/s
Answer:
A
Explanation:
A vector is a physical quantity that has magnitude and direction, so with A having a magnitude of 2.0km and a direction pointing north⬆️
Hope its helps
A bowling lane is 18 meters long. How long would it take a 1.5 m/s bowling ball to
roll down that lane?
16.5 seconds
16.5 meters
12 seconds
27 seconds
27 meters
12 meters
Divide distance by speed:
18 meters / 1.5 meters/ second = 12 seconds
Answer: 12 seconds
A bowling lane is 18 meters long. it would take 12 seconds for a 1.5 m/s bowling ball to roll down that lane, therefore the correct answer is the third option
What is Velocity?The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.
The mathematical expression for velocity is given by
velocity= total displacement/Total time
As given in the problem a bowling lane is 18 meters long and the ball is moving with a velocity of 1.5 m/s in the roll-down lane we have to find the time period for the bowling ball to roll down that lane
Total displacement = 18 meters
the velocity of the ball = 1.5 m/s
time =?
By substituting the values in the formula of the velocity
1.5 = 18/t
t= 12 seconds
Thus , it would take 12 seconds for a 1.5 m/s bowling ball to roll down that lane
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Please help
STUDENT CENTER
FLORIDA SCIENCE
COMPREHENSIVE COURSE 3
Online Textbook Scavenger Hunt
Directions: Explore the digital textbook to find the following information:
1. Where do you access the course textbook from?
2. How many chapters does your textbook contain?
3. How many Units are there in the textbook?
4. Looking at the Lesson Resources in the landing page on the right, name two types of
resources you have access to.
5. What do you click on to see the book as you would physically?
6.
What is the name of Chapter 6?
7. Every chapter
starts with a main idea and chapter project. What is the title of the chapter
project for Chapter 6?
8. How many lessons are there in Chapter 6?
9. Every Chapter also has a Page Keeley Probe to stimulate thinking. What is the title and
page number where you can find the Probe in Chapter 7?
10. Use the glossary to find the definition for the term matter.
11. In how many languages is the glossary written in?
12. What page in the index can you find the description of matter?
13. What pages in the index can you find the explanation for scientific inquiry?
14. Name two skills you can find in the student handbook.
15. In which handbook can you find the Periodic Table of Elements?
16. Where in the Nature of Science Handbook can you distinguish scientific theory from
scientific law?
17. How do you access Learn Smart?
18. Explore LearnSmart. How can LearnSmart be used?
1. Student portal
3.
5.
7. Matter and Aloms
1346
9.
Scavenger Hunt Responses
2.
4.
6.
8. there are too lossoms
10.
11.
13.
15.
17.
12.
14.
16.
18.
Answer:
there are too lesson in chapter 6
1. What type of waves does light travel in? 1.Transverse waves 2.Longitudinal waves
plz help someone
Answer:
Transverse waves
Explanation:
Light moves in waves. Light waves are different from sound waves in that light travels in transverse waves (as opposed to longitudinal, which is how sound waves travel). A light wave that travels in a direction is called a light ray.
The light waves travel as Transverse waves. Therefore, option (1) is correct.
What are Transverse waves?Transverse waves can be defined as waves that usually oscillate along paths that are perpendicular to the direction in which the wave is traveling. Examples of transverse waves involve the vibration of the guitar, electromagnetic waves, water surface ripples, primary waves of the earthquake, and seismic S waves.
Particles of matter in a transverse wave, oscillate up and down about their mean location rather than follow the path of the transmission of the wave.
A transverse wave can be described as every particle of the medium traveling around its mean position in an opposite direction of the propagating direction of the wave.
Transverse waves can be produced in solids and on the surface of liquids. Transverse waves are not possible to create in liquids or gases. Therefore, electromagnetic waves or light waves travel as Transverse waves.
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variation of gravity with depth ??
As we go down the earth, we are moving towards the centre of the earth therefore the distance between us and center of the earth reduces and hence there is reduction in force acting on us by earth i.e gravity.
Dean Potter is known for slacklinging across a 915 metter deep ravine in Yosemite National Park with no safety gear. If his mass is 77 kg, how much potential energy did he have?
Explanation:
answer 689910
M x G x H
mass = 77
G= 9.8
Meter = 915 this is the height
77 x 9.8= 754.6
754.6 X 915 = 689910 J
Dean Potter is known for slacklining across a 915-metter deep ravine in Yosemite National Park with no safety gear. If his mass is 77 kg then he has the potential energy of 691163.55 Joules
What is mechanical energy?As total mechanical energy is the sum of all the kinetic as well as potential energy stored in the system.
ME = KE + PE
As given in the problem Dean Potter is known for slacklining across a 915-meter deep ravine in Yosemite National Park with no safety gear. If his mass is 77 kg,
m =77 kg
h = 915 m
the total potential energy of the dean potter can be calculated withe the help of the formula of the potential energy
PE = mgh
PE = 77*9.81*915
PE = 691163.55 Joules
Thus, he would have the potential energy of 691163.55 Joules
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A helicopter flies 25 km north, 5 km east, then 5 km S, then 15 km W. What is the resultant displacement and direction of the helicopter? Solve using graphical or mathematical methods. Be sure to either show work or explain your graphical methods.
Answer:
Explanation:
Plotting the original location of the helicopter before it flies 25 km north, it would be at the origin, (0,0) then after it flies north, the y vertex gains 25 points, so it would be (0,25)
After it flies east, the x coordinate gains 5 points, so it would now be (5,25)
After it flies south, the y coordinate loses or is subtracted by 5 points. so it would now be (5,20)
After flying west, the x coordinate loses 15 points. So the final vertex would be at (-10,20)
East = Right
West = Left
South= Down
North = Up
I used mainly mathematical methods by adding and subtracting the x and y coordinate values, but this could be graphed easily since I gave the coordinates just incase!
Hope this helps!
Answer:
Explanation:
D = Xf - X
D = 15km West - 25km North
D = -10km West
The cross country team goes on a 10 mile run after school. They end the run outside of the locker room where they started fund the distance and displacement of runner
Distance = 10 miles
Displacement = zero
The coach must be fired and disciplined.
please help please please please
A car went 465km, how far did it go in meters
Answer:
465000 meters
Explanation:
kilometer to meter = ×1000
465 × 1000 = 465000
Answer:
465000 M
Explanation:
1Km = 1000m
465Km= (465)(1000)
465000
A skydiver is falling with a force of 1500 N while the upward force of air resistance is 1000 N. The skydiver’s force is and
has a net force of .
The skydiver is
unbalanced; net force = 500 N; accelerating
unbalanced; net force = 500 N; at terminal velocity
balanced; net force = 1500 N; moves to the left
balanced; no net force; at terminal velocity
It will be unbalanced and at terminal velocity
Now
[tex]\boxed{\sf F_{net}=F_1-F_2}[/tex]
[tex]\\ \sf\longmapsto F_{net}=1500-1000[/tex]
[tex]\\ \sf\longmapsto F_{net}=500N[/tex]
Option b is correct
Regulation size of a Tennis racket cannot have a hitting surface larger then.
a.12.5 inches in width
b.11 inches in width
c. 11.5 Inches in width
d.12 inches in width
Answer:
C.
Explanation:
"A racquet can be a maximum of 29 inches long while the hitting surface (the head) cannot be more than 15.5 inches in length and 11.5 inches wide."
