Answer:
2m/s.
Explanation:
Speed = Distance / Time
= 4m / 2s
= 2m/s.
What is the importance of Scientific Notation and Significant Figures?
Answer:
they're important because they simplify the results of the comparison
student is given a rock that is known to have a mass of 436.8 grams. She measures the mass of the rock three different times with the following results: 460.9 g, 461.4g, 459.0 g. Calculate the percent error of the student.
Given :
Actual mass , [tex]m_e=436.8\ g[/tex] .
Three observations 460.9 g, 461.4 g, 459.0 g .
To Find :
The percent error of the student.
Solution :
Percent error is given by :
[tex]\%error=\sum \dfrac{|approx\ value -actual\ value |}{exact\ value}\times 100\\\\\%error=\dfrac{|460.9-436.8|+|461.4-436.8|+|459-436.8|}{436.8}\times 100\\\\\%error=\dfrac{70.9}{436.8}\times 100\\\\\%error=16.23\%[/tex]
Therefore , the percent error of the student is 16.23 % .
Hence , this is the required solution .
ball is dropped from the height H the total distance covered in last second of its motion is equal to distance covered in first 3 second. find the height.
pls answer this question correctly and don't give any irrelevant or else I will report the answer....
[tex]\rm{\gray{\underline{\underline{\blue{GIVEN:-}}}}}[/tex]
A ball is dropped from a height = HThe total distance covered in last second of its motion is equal to the distance covered in first 3 second .[tex]\rm{\gray{\underline{\underline{\blue{TO\:FIND:-}}}}}[/tex]
The height of the journey .[tex]\rm{\gray{\underline{\underline{\blue{SOLUTION:-}}}}}[/tex]
We have know that,
[tex]\green\bigstar\:\rm{\gray{\overbrace{\underbrace{\red{S\:=\:ut\:+\:\dfrac{1}{2}\:at^2\:}}}}}[/tex]
Where,
S = Distance .u = initial velocity = 0m/st = time = 3sa = acceleration[Note :- Here, acceleration is ‛acceleration due to gravity’ .]
a = 10m/s^2=> S = 1/2 × 10 × (3)^2
=> S = 5 × 9
=> S = 45m -----(1)
✒ If the ball takes ‛n’ second to fall the ground, then distance covered in nth second is,
[tex]\green\bigstar\:\rm{\gray{\overbrace{\underbrace{\red{S_n\:=\:u\:+\:\dfrac{g}{2}\:(2n\:-\:1)\:}}}}}[/tex]
=> Sn = 0 + 10/2 (2 × n - 1)
=> Sn = 5 (2n - 1)
=> Sn = 10n - 5 -----(2)
Therefore,
10n - 5 = 45=> 10n = 45 + 5
=> n = 50/10
=> n = 5
Now put the value of ‛n = 5’ in equation(2), we get
=> Sn = 10 × 5 - 5
=> Sn = 50 - 5
=> Sn = 45m
[tex]\rm{\pink{\therefore}}[/tex] The height of the journey is “ 45m ” .
Physics, really easy
Answer:
I am pretty sure its C
Explanation:
What is Average rainfall in the desert?
Answer:
less than 10 inches, or 25 centimeters, of precipitation a year.
Explanation:
PS. the precipitation recieved in the desert can be in the form of either rain or snow.
Explain why written communication in science is important. I’ll give brainlest!!!!!!! Help me
Which of the following is the primary function of the nucleus? Choose 1 answer: Choose 1 answer: (Choice A) A Breaking down unnecessary materials (Choice B) B Absorbing sunlight (Choice C) C Producing ATP for the cell (Choice D) D Storing genetic material
Answer:
D) D Storing genetic material
Explanation:
Answer:
D) D Storing genetic material
Explanation:
a man pulls a box with a force of 90.0 N directed along the handle which makes angle of 45 degrees with the ground. find the horizontal and vertical components of this force
Answer:
The horizontal component of the force, Fₓ = 63.64 N
The vertical component of the force, [tex]F_y[/tex] = 63.64 N
Explanation:
Given;
magnitude of the force, F = 90 N
angle between the handle and the ground, θ = 45°
The horizontal component of the force, Fₓ = Fcosθ
Fₓ = 90 x cos45
Fₓ = 63.64 N
The vertical component of the force, [tex]F_y = Fsin \theta[/tex]
[tex]F_y[/tex] = 90 sin45
[tex]F_y[/tex] = 63.64 N
Therefore, the horizontal and vertical components of the force is 63.64 N.
In Europe, gas cost approximately €0.98 per liter. How many dollars($) per gallon is this? using a factor method
Answer:
€0.98 per liter = 4.377 doller per gallon
Explanation:
It is given that, In Europe, gas cost approximately €0.98 per liter. We need to convert it into dollars($) per gallon.
We know that, 1 euro = 1.18 United States Dollar
1 litre = 0.264172 US gallon
Cost of gas in Europe is €0.98 per liter.
[tex]0.98\ \text{euro/ liter}=\dfrac{0.98\times 1.18\ \text{doller}}{0.264172\ \text{gallon}}\\\\=4.377\ \text{doller/gallon}[/tex]
Please help me with thus question (picture) D:
well thanks for the Information
Explanation:
Torque = Force * Perpendicular distance of the force = 10N * 0.8m = 8Nm.
In diagram A, both torques are acting in a clockwise direction. Hence the net torque is 2N * 1m + 4N * 1m = 6Nm, clockwise.
In diagram B, the torques are acting in opposite directions. For the clockwise one, its torque is 5N * 4m = 20Nm. For the anticlockwise one, its torque is 2N * 10m = 20Nm. Since they are in opposite directions and are equal, they cancel out each other.
Hence net force = 0N and net torque = 0Nm.
A person walks first at a constant speed of 4.90 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 3.05 m/s.A) What is her average speed over the entire trip?
B) What is her average velocity over the entire trip?
Answer:
A.) 3.975 m/s
B.) 0.925 m/s
Explanation:
Given that a person walks first at a constant speed of 4.90 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 3.05 m/s.
A) What is her average speed over the entire trip?
The average speed = (4.90 + 3.05)/2
Average speed = 7.95/2
Average speed = 3.975 m/s
B) What is her average velocity over the entire trip?
Since velocity is a vector quantity, that is, we consider both the magnitude and direction
Average velocity = ( 4.90 - 3.05)/2
Average velocity = 1.85/2
Average velocity = 0.925 m/s
Which of the following is the energy stored in an object as a result of its vertical position or height? Elastic potential energy Gravitational potential energy Kinetic energy Thermal energy
Answer:
Gravitational potential energy
Explanation:
Gravity would act upon it if it were not suspended.
Answer: Gravitational potential energy
Explanation: I did the quiz! Hope it helped!
What are two causes of friction? *
Answer: Friction is a force that resists the relative motion between two objects or materials. The causes of this resistive force are molecular adhesion, surface roughness, and deformations. Adhesion is the molecular force resulting when two materials are brought into close contact with each other
A moon rock is dropped from a cliff and it takes 2 seconds for the rock to fall 6.6 meters. What is the moon rock’s average speed?
Average speed = (total distance) / (time to cover the distance)
Speed = (6.6 meters) / (2 seconds)
Speed = 3.3 m/s
What do you dislike about science?
Answer:
nngh have
bjruh hjrhhj be rnrnnrnrnnnrnjrjnnnnnnnnrnrn n n and I was nrn
Explanation:
jbbbbbhhhjjnnnnnnnnnnjhvcc
Explanation:
While flying due east at 33 m/s, an airplane is also being carried due north at 12 m/s by the wind. What is the plane's resultant velocity?
Answer:35.11
Explanation:
You drive for 5 hours at a speed of 70 km/hr. How far did you go?
Answer:
350 miles
Explanation:
because multiply 70 times 5 and you will get 350
what is the dependent variable
Answer:
a variable (often denoted by y) whose value depends on that of another.
Four states of matter and describe the particles arrangement of each
Answer:
There are four natural states of matter: Solids, liquids, gases and plasma.
Explanation:
The fifth state is the man-made Bose-Einstein condensates. In a solid, particles are packed tightly together so they don't move much.
6. Explain what it means to have your hypothesis “refuted".
Answer:
Your hypothesis would be proven wrong.
Explanation:
To have a hypothesis be refuted, your hypothesis would be able to be proven wrong. A hypothesis has to be able to be supported and refuted, or proven wrong.
Arrange the following lengths in their increasing magnitude 1 meter, centimeter, 1 kilometer, 1 millimeter
Answer:
1 millimetre, 1 centimeter, 1 meter, 1 kilometer
Hope it helped u if yes mark me BRAINLIEST
A ball is dropped from the roof of the A200 building. How fast is a traveling 0.5 seconds later?
ANYTHING that's dropped near the Earth's surface and isn't affected by air resistance falls 9.8 m/s faster at any time than it did 1 second earlier.
0.5 second after it was dropped with zero speed, it's falling at
(0.5) x (9.8 m/s) = 4.9 m/s .
It makes no difference which building it was dropped from.
The news media, such as newspapers and television stations, carry current events worldwide. Explain how the way news travels is similar to the way a wave travels.
Answer:
A simile can be established with the news, where the fact that occurs is the matter of has some type of oscillation or disturbance, which occurs somewhere and is there, the news is the wave that carries the information of this fact the energy of the same to all points, therefore it is equivalent to a traveling wave.
Explanation:
Traveling waves are disturbances of the medium that are transmitted with a constant speed, where matter is subjected to oscillations around its equilibrium point, transporting only energy.
A simile can be established with the news, where the fact that occurs is the matter of has some type of oscillation or disturbance, which occurs somewhere and is there, the news is the wave that carries the information of this fact the energy of the same to all points, therefore it is equivalent to a traveling wave.
The news is the wave that carries the information of this fact and the energy of the same to all points, making it equivalent to a traveling wave.
What is a wave?A wave is a phenomenon that flows across a material medium without leaving any lasting mark. Mechanical or electromagnetic waves can be used to classify them.
Transverse and longitudinal are the two main forms.
The wave can be compared in the form of news as
The news is the wave that carries the information of this fact and the energy of the same to all points, making it equivalent to traveling. wave.
Traveling waves are medium disturbances that are conveyed at a constant pace, where matter oscillates around its equilibrium point, transferring only energy.
A parallel may be drawn with the news, where the fact that occurs is the issue of having some sort of oscillation or disturbance.
Hence the news is compared with the help by the help of energy and information.
To learn more about the wave refer to the link;
brainly.com/question/3004869
What's the main reason why people use graphs
what is weight ?on what factor does it depend.
Answer:
weight is the mass of an object
it is depends on mass of the body.
Answer:
the force with which an object near the earth on another celestial body is atteracted toward the center of the body by gravity. an objects weight depends on its mass
What is the main function of chloroplasts?
Choose 1 answer:
(Choice A)
A
To store food, water, and waste
(Choice B)
B
To package and sort proteins
(Choice C)
C
To convert sunlight into usable sugars
(Choice D)
D
To produce ATP for the cell
Answer:
C
To convert sunlight into usable sugars
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Explanation:
define s.i unit of force explanation
◈ As per newton's second law of motion, Force is defined as the product of mass and acceleration[tex].[/tex]
Mathematically,
[tex]\dag\:\boxed{\bf{\purple{F=ma}}}[/tex]
Unit of mass : kg
Unit of acceleration : m/s²
Therefore,
Unit of force ➠ kg m/s²
SI unit : N (newton) or kg m/s²
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Giardia is a eukaryotic organism that can cause intestinal illness in dogs, cats, and humans.
Which of the following distinguishes Giardia from all prokaryotes?
Choose 1 answer:
(Choice A) A It can reproduce.
(Choice B) B It has cytoplasm.
(Choice C) C It has a nucleus.
(Choice D) D It is single-celled.
Answer:
it has nucleus
Explanation:
Giardia is a microscopic single celled prokaryotic organism that causes giardiasis. Giardiasis is an intestinal Infection in humans and dogs which is caused by giardia. It is an eukaryotic organism that have nucleus and nuclear membrane but it lacks other ORGANELLES that are present in Eukaryotic organisms. It causes diarrhoea in humans and woman's can get infected from dogs.
Answer:
The answer is nucleus.
Prokaryotes dont have a nucleus, but this Giardia is a eukaryotic organism so it has a nucleus.
Explanation:
what is kinetic energy
Answer:
Kinetic energy is the energy possessed in a body in motion
Answer:
wind energy is also called kinetic energy
Question 6 (1 point)
A biker is going 9m/s when they see a cat in the road. The biker presses her brakes
and slows down with an acceleration of -5m/s2 over a time of 2.1s. Calculate how
far the biker traveled during this time.
a) 18.9
b) 13.7
c) 7.9
d) -3.2
Answer:
A
Explanation:
my teacher said