Answer:
The acceleration is g.
Taking the upward direction as positive
V = Vy y - 1/2 g t^2
Taking the downward direction as positive
V = -V y + 1/2 g t^2
One can choose either direction as positive, but the acceleration is
the same as g (it is g) while the projectile is in the air.
When a projectile reaches the highest point the vertical component of the acceleration is negative g (acceleration due to gravity). Thus, the correct option is D.
What is Projectile motion?Projectile motion is the motion of an object which is thrown or projected high into the air. After the initial force applied on the object that launches the object, the object only experiences the gravitational force. The object is called a projectile and the path of the object is called trajectory.
When a projectile reaches the highest point the vertical component of the acceleration is negative g (acceleration due to gravity). When the object achieves highest point, then the vertical acceleration of a projectile is zero meter per second square when it is at the peak of its trajectory motion.
Therefore, the correct option is D.
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when electricity is passed through aqueous solution of Sodium chloride following reaction takes place. Identify the correct combination of given options. (a). This process is called chlor-alkali process. (b). Chlorine gas is given off at the cathode, Hydrogen gas at anode and sodium hydroxide solution near cathode. (c). chlorine gas obtained in this process can be used as disinfectant. (d). Chlorine gas is given off at the anode, hydrogen gas at cathode and Sodium hydroxide solution formed near cathode. (e). sodium hydroxide solution is called brine. (f). The given equation doesn't obey law of conservation of mass.
Answer:
When electricity is passed through an aqueous solution of sodium chloride, it gives hydrogen, chlorine and sodium hydroxide as a product. The balanced chemical equation is, This process is called as Electrolysis of Brin im in hardvard dont cheat and get good grades and become a graduate in hardvard
Explanation:
Submit a hand-drawn picture by you of the following.
"Humpty Dumpty sat on a wall, Humpty Dumpty had a great fall, and all the king's horses and all the king's
men couldn't put Humpty Dumpty back together again."
Please help, thanks.
How mass and volume of matters are connected to density?
This is a physics question not maths
Answer:
An object's density is the ratio of mass to volume of an object. The mass is how much it resists acceleration when a force is applied to it and generally means how much of an object or substance there is. Volume describes how much space an object takes up.
If 1 light year = 9.46x 1015.
m and 1 mile = 1.6 km, how many miles are in a light year? You
Answer:
5 912 500 000 000 = 5.91x10^12 miles
Explanation:
The first thing we need to do is convert the light year distance to kilometres, since we have the kilometre to mile conversion. There are 1000m in a kilometre, so we need to divide the light year value that we have by 1000, giving us 9.46x10^12 km for 1 light year.
Now that we have our value in kilometres, we simply need to divide it by 1.6 to get it in miles. Doing so gives us 5 912 500 000 000 miles, or 5.91x10^12 miles.
Hope that made sense, and let me know if you have any further questions!
if an object is launched at 40 degrees what other angle will give you the same range
Answer:
50 degrees
Explanation:
complimentary angles will give you the same range
Will mark brainliest help last question
Answer:
b
the def of convection is : process by which heat is transferred by movement of a heated fluid such as air or water
therefore c and d are wrong.
Explanation:
An engine raises 120kg of water through a height of 40m in 30s.What is the power of the engine take gravity to be = 10m/s.
Answer:
1600 W
Explanation:
Power is the product of force and distance, divided by time.
P = (120 kg)(10 m/s²)(40 m)/(30 s) = 1600 kg·m²/s³ = 1600 W
Which stament describes Newton’s law of universal gravitation
Mass has little effect on gravity between objects
Gravity pushes objects away from earths center
Gravity does not act between earth and the moon
Every object in the universe attracts every other object
I’ll give brainliest
types of circulatiom
Evaluate tan(24°).
ОА. 1.36
В. 0.45
Ос. 0.41
OD. 0.91
Answer:
B. 0.45
Explanation:
You just need to plug this into a calculator.
A baseball pitcher delivers a fast ball. During the throw, the speed of the ball increases from 0 to 30.0 m/s over a time of 0.100 seconds. The acceleration of the baseball is ____ m/s2.
a.
30
b.
3000
c.
300
d.
3
Weight of an object remains same on the Earth and the Moon.
true or false?
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Aluminum foil crunched between teeth with gold fillings (which one is negatively charged and which one is positively charged?)
Answer:
Aluminum foil is negatively charged and gold fillings are positively charged.
Hope this helps :)
Please help on these two thanks
Explanation:
Number 29
= 10 N (from rocket) + 10 N (from wheels) - 7 N (from parachute 'cause force in other direction)
= 20 N - 7 N
= 13 N ✔
Number 30
= 100 N - 85 N
= 15 N to the left ✔
A student's computational model of a falling object does not account for air flow. Which of the following statements is true? (1 point)
1. This computational model must be redone because this simplification will increase the amount of computational power needed for this program.
2. This computational model must be redone because computational models should not include simplifications.
3. This is a simplification, which will create inaccuracies, but computational models of complex systems often include simplifications 4. This computational model is strong because simplifications can make computational models more accurate.
Option 3. This is a simplification, which will create inaccuracies, but computational models of complex systems often include simplifications.
A student's computational model of a falling object does not account for air flow is " this is a simplification, which will create inaccuracies, but computational models of complex systems often include simplifications".
What is computational models?Using computers to simulate and investigate complicated systems utilizing mathematics, physics, and computer science is known as computational modeling. Numerous variables in a computational model describe the system under study.
In behavioral science, computational modeling aims to employ exact mathematical models to better understand behavioral data. Most frequently, the behavioral data are choices, but they can also be reaction times, eye movements, or other plainly visible behaviors, or even neurological data.
This is a simplification, which will create inaccuracies, but computational models of complex systems often include simplifications.
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Roadrunner speeds up from 2m/s to 10m/s in a distance of 10m. What is his acceleration?
d = v·t + (1/2)·a·t^2
a = 10m/s^2. t = 10s
v = 0m/s. Initial velocity
d = 0·10 + 10/2 · 10^2 = 0 +5·100
d = 500m
Chọn câu sai :
A. Đồ thị vận tốc theo thời gian chuyển động thẳng đều là một đường song song với trục hoành Ot
B. Trong chuyển động thẳng đều ,đồ thị theo thời gian của tọa độ và của vận tốc đều là những đường thẳng
C. Đồ thị toạ độ theo thời gian của chuyển động thẳng đều bao giờ cũng là một đường thẳng
D. Đồ thị toạ độ theo thời gian của chuyển động thẳng đều là một đường thẳng xiên góc
P.s this language is: Viatnamese :)
Answer:
This is just to help the other readers help you. Or so that you understand:
Đây là để giúp bạn đọc giúp bạn!
What they tried to say:
Choose the wrong sentence:
A. The velocity-time graph of uniform linear motion is a line parallel to the horizontal axis Ot
B. In uniform linear motion, the time graphs of the coordinates and of the velocity are both straight lines
C. The time-coordinate graph of uniform rectilinear motion is always a straight line
D. The coordinate-time graph of uniform linear motion is an oblique line
Is what they asked you.
Thankyou and your welcome
Vì tôi đã giúp đỡ, tôi có thể vui lòng có cám ơn nào không?
Have a great day!
~Happy helper~
A block m1 rests on a surface. A second block m2 sits on top of the first block. A horizontal force F applied to the bottom block pulls both blocks at constant velocity. Here m1 = m2 = m.
(a)
What is the normal force exerted by the surface on the bottom block? (Use the following as necessary: m and g as necessary.)
Answer:
N = 2mg
Explanation:
Assuming the surface is horizontal
The surface must provide enough normal force to prevent the masses from accelerating in the vertical direction.
(a) The normal force exerted by the surface on the bottom block is N1 = 2mg.
Given that,
A block m1 rests on a surface. A second block m2 sits on top of the first block. A horizontal force F applied to the bottom block pulls both blocks at constant velocity. Here m1 = m2 = m.Based on the above information, we can say that the N1 is 2mg.
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What is the Validity measures of a basketball bouncing
This study was aimed at testing the construct validity of the basketball basic motion skills test instrument (ITK GDBB). The research used descriptive method of 3 basketball experts in the city of Cimahi; 3 experts are the expert in basketball. The instrument used was the ITB GDBB developed by Silvy (2019) consisting of top passing, bottom passing, top service, bottom service, chest passing, bounding passing, overhead passing, and leading ball (dribbling). This instrument consists of 76 items that cover 4 domains in basketball, namely chest pass, overhead pass, bound pass, and dribbling. The validity method used the construct validity of different power types. For the reliability method, it used the Kuder Ricardson (KR) and Objectivity analysis. The results of the construct validity analysis of a total of 76 items show that the score is ranged from 0.67 to 1.00. The construct validity value of 71 items in the basketball game is in the high category (= 1.00), 5 items are in the sufficient category, the relativity score is ranged from 0.75 to 0.98, and the objectivity score is ranged from 0.89 to 0.95. The conclusion is that this test instrument can be used as a standardized basic motion skill test for standardized large ball games for validity in basic motion skills in basketball games for grade VII junior high school students.
If you push on a door for 12 seconds with a force of 53 N, how much impulse
have you applied to the door?
A. 815 kg•m/s
B. 332 kg•m/s
C. 636 kg•m/s
D. 4.42 kg•m/s
Answer:
C. 636 kg•m/s
Explanation:
53(12) = 636 N•s or kg•m/s
40. What is the acceleration of a 10 kg object if a force of 3 N is applied to it?
The Sun's primary energy source is
Answer:
nuclear fusion
Explanation:
converting hydrogen to helium.
A particular car can go from rest to 90 kmh in 10 seconds. What is its
acceleration. (Show your calculation
Answer:
Im sorry i dont know But thank you for the points
i commit to uphold the truth by
Answer:
the truth was committed to upload by me
Explanation:
passive voice
A racecar begins at rest and accelerates to 25 m/s at a rate of 6.25 m/s2. What distance does the racecar cover?
a.
2 m
b.
156 m
c.
4 m
d.
50 m
Answer:
d.
50 m
Explanation:
v² = u² + 2as
s = (v² - u²) / 2a
s =(25² - 0²) / (2(6.25))
s = 50 m
help please this is due in an hour!!!
[tex]▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ { \huge \mathfrak{Answer}}▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ [/tex]
Charge on one electron :
[tex]1.602 \times 10 {}^{ - 19} \: \: coulombs[/tex]So, charge on ball having 97 electrons is equal to :
[tex]97 \times 1.602 \times 10 {}^{ - 19} [/tex][tex]155.394 \times 10 {}^{ - 19} [/tex][tex]1.554 \times 10 {}^{ - 17} \: \: coulombs[/tex]OMG LOOK AT THIS! YOU WON'T BELIEVE IT!!!!!!!!!!!!
what would happen to the weather if half of the human race died off? would it get colder? why?
it would get healthier considering the stuff we put into the air and weather
And the decaying bodies from the virus you talked about would decompose and go into the soil creating natural fertilizer which means better plans moer air better weather
Which area of astronomy does Kepler's laws address? (1 point)
A. The movement of asteroids in the solar system
B. The movement of the sun in relation to the planets.
C. The movement of planets within the solar system.
D. The movement of stars within galaxies.
Answer:
B
Explanation:
His law describes the orbits of planets around the Sun.
The area of astronomy that Kepler's laws address is the movement of planets within the solar system. The correct option is C.
What is Kepler's law?According to Kepler's first law, "all the planets revolve in elliptical orbits around the sun, with the sun at one of the foci."
Perihelion is the point at which the planet is closest to the sun, and aphelion is the point at which the planet is farthest from the sun.
Kepler's laws of planetary motion, published between 1609 and 1619 by Johannes Kepler, describe the orbits of planets around the Sun.
Kepler's laws of planetary motion represent a watershed moment in the transition from geocentrism to heliocentrism. They establish the first quantitative link between the planets, including Earth.
Thus, the correct option is C.
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please can anybody tell me what is this lab equipment
Answer:
hii there
its a test tube holder
Explanation:
hope it helps
