Answer: 21.9 mm
Explanation:
Given that five independent measurements are made of the diameter of a cylinder. Results, in mm, are: 21.8; 21.6; 22.1; 21.9; 22.1. What should be the reported value of the cylinder's diameter?
The measurement of the diameter of cylinder is measured several time in order to reduce the uncertainty called random error.
The reported value of the cylinder's diameter should be the average or the mean value of the whole measurement.
That is
Mean = (21.8 + 21.6 + 22.1 + 21.9 + 22.1) ÷ 5
Mean = 109.5 ÷ 5
Mean = 21.9 mm
Therefore, the reported value of the cylinder diameter will be 21.9 mm
One of the signs a chemical reaction is taking place
Answer: One of the signs a chemical reaction is taking place is the presence of bubbles. :)
I NEED HELP
The average kinetic energy of the particles of two pieces of iron at the same temperature and mass would be __________.
Question 1 options:
Different
The same
Not equivilent
With in 500 degrees of eachother
Answer:
the answer is different
Explanation:
i took the test
What is the speed of a 180 g ball if its kinetic energy is 100 J?
Answer:
Velocity, V = 33.33 m/s
Explanation:
Given the following data;
Mass = 180grams to kilograms = 180/1000 = 0.18 kg
Kinetic energy = 100J
To find the speed;
Kinetic energy can be defined as an energy possessed by an object or body due to its motion.
Mathematically, kinetic energy is given by the formula;
[tex] K.E = \frac{1}{2}MV^{2}[/tex]
Where;
K.E represents kinetic energy measured in Joules.
M represents mass measured in kilograms.
V represents velocity measured in metres per seconds square.
Substituting into the equation, we have;
100 = ½*0.18*V²
Cross-multiplying, we have;
200 = 0.18*V²
V² = 200/0.18
V² = 1111.11
Taking the square root of both sides, we have;
Velocity, V = 33.33 m/s
How are ultraviolet waves used for communication
A 3500 N is force is applied to a spring that has a spring of constant of k= 14000 N/m. How far from equilibrium will the spring be displaced?
Answer:
the spring be displaced by 25.0 cm
Explanation:
The computation is shown below:
As we know that
F= -K × x
So,
[tex]x = \frac{-F}{K}[/tex]
Now
[tex]x = \frac{-3500}{14000} \\\\[/tex]
= -0.250m
= 25.0 cm
Hence, the spring be displaced by 25.0 cm
Please help ill give out brainliest?!!!
Do you think we might have problems with not enough water to supply our needs (water scarcity) in the
ture? Why or why not? If you answered yes, what might the causes be?
Answer:
Water scarcity (water stress or water crisis) is the lack of fresh water resources to meet the standard water demand. Humanity is facing a water crisis, due to unequal distribution (exacerbated by climate change) resulting in some very wet and some very dry geographic locations, plus a sharp rise in global freshwater demand in recent decades driven by industry. Water scarcity can also be caused by droughts, lack of rainfall, or pollution. This was listed in 2019 by the World Economic Forum as one of the largest global risks in terms of potential impact over the next decade.[1] It is manifested by partial or no satisfaction of expressed demand, economic competition for water quantity or quality, disputes between users, irreversible depletion of groundwater, and negative impacts on the environment.[2] Two-thirds of the global population (4 billion people) live under conditions of severe water scarcity at least 1 month of the year.[3][4][5][6] Half a billion people in the world face severe water scarcity all year round.[3] Half of the world's largest cities experience water scarcity.[5]
PLEASE READ CAREFULLY. AND PLEASE MARK AS BRAINLIEST
What is the potential energy at Z
Answer:
It would be 2,500
Explanation:
The KE is 7,500 so the PE would be 2,500
you do no know an objects velocity until you know its _____.
what ways might a superhero utilize magnetic forces to move, levitate or travel from place to place?
Answer:
He could use magnets to lift heavy things and also move things like a train
Explanation:
i had the same question
What color rays have the smaller/lesser angle
Answer:
Blue?
Explanation:
Which quantity must be the same for two bodies in thermal equilibrium?
А Total internal energy of the particles in the two bodies are the same.
B Total kinetic energy of the particles in the two bodies are the same.
C Temperature of the two bodies are the same.
D State of matter of the two bodies are the same.
Which is not a measurement of effort for exercises or activity?
repetitions
time
distance
elevation
Helppp!!!!! Please!!
A 0.144 kg baseball approaches a batter with a speed of 20m/s . The batter lines the ball directly back to the pitcher with a speed of 30m/s . Find the impulse exerted on the ball . If the bat and ball were in contact for 0.012 sec , find the average force exerted on the ball by the bat????
Answer:
Can you help me in mathematics
Which type of earthquake waves are responsible for most of the damage caused by an earthquake? Why?
please helppppp its due tomorrow
Answer:
Surface waves travel along the surface. There are two types of body waves: P-waves travel fastest and through solids, liquids, and gases; S-waves only travel through solids. Surface waves are the slowest, but they do the most damage in an earthquake.
Answer:
surface waves
Explanation:
they have the strongest vibration and can cause the most damage
Explain how you can locate the Pole Star with the help of Ursa Major?
Answer: Pole star can be located using Ursa Major by extending an imaginary line from the last two stars towards the North direction.
Explanation:
Answer:
The pole star can be located using the Ursa Major constellation, by imagining a line towards the Northern direction connecting two stars present at the end of the bowl, This imaginary line meets Pole Star. The length of the imaginary line from the bowl is about five times the distance between the two stars of the bowl.
Explanation:
pls help, i really dw fail :(
Answer:
Using the Newton equation
V²=U² +2as
Given; V=9.2m/s U = 0m/s( because it starts from rest)
S=26.2m.
9.2²=0²+2(26.2)a
a =9.2²/2(26.2)
a=84.6/52.4
a=1.60m/s²
Answer:
2.A
3.D
Explanation:
HOPE THIS HELPS!! :)
A certain element has a half-life of 200 years. How much of a 1600 gram sample would be left after 800 years?
2222222×7÷4÷5+6(8×9)
An object is moving to the right at a constant velocity. What will happen if a
force of 20 N starts acting on it in the opposite direction?
А
The object's velocity will increase.
B
The object's velocity will decrease.
с
The object will come to a stop.
D
The object will move at the same velocity.
Answer:
A
Explanation:
just trust me
Given an objects mass and observing its acceleration what can be found in a direct application of Newton’s second law of motion?
While standing at home plate, a batter swung a 2.5kg bat at 2.5 m/s toward an incoming mass. The mass was a 0.4 kg blob of clay, thrown toward the batter at 26 m/s, which stuck the the bat in an inelastic collision. What velocity of the velocity of the bat and blob of clay (which are stuck together) after the collision? Help fast will give brainliest
Show work
Answer:
5.74 m/s
Explanation:
m1v1+m2v2=(m1+m2)*vf
2.5*2.5+0.4*26=(2.9)vf
16.65=2.9vf
vf=5.74 m/s
Gizmo uniform circular motion
Donna shines a flashlight and a laser pointer on a sheet of paper. She holds each device at an equal distance from the paper. How does the light hitting the paper from each device appear different?
The light from the flashlight lights up a larger area of the paper.
The light from the laser pointer lights up a larger area of the paper.
The light from the flashlight magnifies a larger area of the paper.
The light from the laser pointer magnifies a larger area of the paper.
Answer:
A the light on the flash light lights up a bigger area
I'm pretty sure this is right.
Explanation:
Answer:
a
Explanation:
NEED HELP ASAPTsunamis are often called tidal waves because they are caused by tides.
o True
o False
Answer:
false
Explanation:
a tsunami is almost always caused by an earthquake under water.
is boiling water in a kettle on a stove kinetic or potential energy?
Answer:
Boiling a kettle is an example of both thermal and kinetic energy. Thermal energy comes from a substance whose molecules and atoms are vibrating faster due to a rise in temperature. Heat energy is another name for thermal energy. Kinetic energy is the energy of a moving object.
it's kinetic!
PLEASE HELP ASAP!!
Select the correct answer.
According to this map, which county in Florida is most in need of safe rooms and hurricane ties?
A.
Hillsborough
B.
Jefferson
C.
Palm Beach
D.
Miami-Dade
Answer:
I think it's Miami-Dade
Explanation:
i hope this helps
Answer:
it is miami-dade!
Explanation:
name one material through which continuous flow of charge can be produced from chemical energy
Answer:
Battery.
Explanation:
A battery is a device that stores chemical energy, and converts it to electricity. This is known as electrochemistry and the system that underpins a battery is called an electrochemical cell. A battery can be made up of one or several (like in Volta's original pile) electrochemical cells
A cinder block is sitting on a platform 10 m high. It has a mass of 25 Kg. What is the potential energy
Answer:
2450J
Explanation:
PE = mgh
PE = (25)(9.8)(10)
a trolley of mass 20kg was originally at rest on a smoth horizontal surface. bu how much will it accelerate if a pulling force of 22N is applied on it horizontally?
Answer:
just divide 22 N by 20 kg to get the acceleration in m/s2
Explanation:
I hope this is right-
PLEASE HELP ASAP!!!!!
Answer:
MOSE
Explanation: