Answer:
Mendeleev
Explanation:
He discovered the periodic table trying to organize the elements in 1869
You are crouched at the "start" line. Bang! The race begins and 7 seconds later you end up 60 yards down the track. What was your "acceleration?"
Answer:
a = 7.35 ft / s²
Explanation:
For this exercise we must use the kinematics relations
x = v₀ t + ½ a t²
as the runner leaves the starting line his initial velocity is zero
x = ½ a t²
a = [tex]\frac{2x}{t^2}[/tex]
let's reduce the distance to foot
x = 60 yd (3ft / 1yd) = 180 ft
let's calculate
a = 2 180 / 7²
a = 7.35 ft / s²
A DNA macromolecule is made up of two strands of DNA, which are connected to form a DNA double helix. The bonds between
the atoms in each strand are covalent bonds. The bonds between the two strands are hydrogen bonds. Which of the following
statements is true about the DNA double helix?
Answer:
where is the multiple choice?
1 Newton is the force that can give a mass of 1 kg an acceleration of
How is mechanical weathering affected by climate
Explanation:
In general, hot wet climates accelerate chemical weathering while cold dry climates accelerate physical weathering. Although the rate of weathering depends on the type of rock, rocks in tropical climates experience the highest rates of weathering because of the combination of high heat and heavy rainfall.
In which activities is speed helpful? Running track Swimming Riding in a bike race All of the above
Answer:
all of the above
Explanation:
they all require speed to beat
Answer:
All of the above
Explanation:
if your taking any kind of quiz or even review and there's a choice of "all of the above" it's always right because that answer won't be on every question!
What two factors does speed depend on?
PLEASE HELP I AM GIVINF 99 POINTS PLEASE
Answer:
B
Explanation:
Answer:
B
Explanation:
can you please help me
Answer:
I dont know sorryyyyyyy
Boondocks wallpapers Part 1. . . Part 2 is in a couple minutes
Answer:
Is this considered free points
Explanation:
Xplain to someone who knows nothing about fossils the study of paleobotany and how it helps scientists understand the history of the earth. Be sure your explanation contains a minimum of two complete sentences.
Answer:
They're impressions of organisms preserved in rock. Paleontologists use fossil remains to understand different aspects of extinct and living organisms. They do this by analyzing invertebrate fossils. All of this, all this studying helps to know our past.
Explanation:
A net force of 16n causes a mass to accelerate at a rate of 5m/s2 determine the mass
Answer:
3.2 kg
Explanation:
From Newton's second law of motion: [tex]F=ma[/tex], where F is the force needed to give a mass m an acceleration a. Here, we have F = 16N and a = 5 m/s². Substituting those values in to our formula gives us 16N = (5 m/s²)m, and solving for mass gives us 16/5 = 3.2 N/(m/s²).
Since a Newton is defined with the units kg·(m/s²), the units of acceleration in the numerator an denominator cancel, leaving us just with units of mass, so our mass is exactly 3.2 kg.
If a ball has 300 Joules of potential energy at its highest point, how much kinetic energy will it have at its highest speed?
A; less than 300 Joules
B; more than 300 Joules
C: exactly 300 Joules
D; cannot be determined
If a ball has 300 Joules of potential energy at its highest point, Then the kinetic energy is the same at that point i.e exactly 300 Joules. The correct option is (C).
What are kinetic and potential energy?When a body has a mass of m kg and travels a velocity of v m/s then the kinetic energy is given by,
KE=1/2mv²
And when a body is at a height of h meter from the ground and the mass of the body is m kg, then the potential energy is given by,
PE= mgh
Where g= acceleration due to gravity= 9.81m/s²
At The highest point, the kinetic energy is equal to the potential energy.
i.e at the highest point,
KE=PE
Hence If a ball has potential energy at the highest point is 300J that means the kinetic energy at the point is the same i.e 300J.
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⚠️PLZ HELP FAST⚠️
-Two recordings were made of a musical performance: one analog, one
digital. Copies were made of each recording to sell. The table below
compares the copies made using analog and digital signals.
Answer:the answer is A and B
Explanation:
Option A and B are two reasons why digital signals are more dependable than analog signals for copying sound recordings. Options A and B are correct.
What is digital signal?A digital signal is one in which data is represented as a series of discrete numbers.
To reduce the influence of noise in communication, a digital signal is utilized. When compared to analog signals, digital signals convey more information per unit time.
The digital signal has a higher quality throughout long distance transmission. The use of bandwidth is reduced when digital signals are sent.
The two reasons the digital signal is a more reliable way to copy sound recordings than the analog signal are;
A. The digital signal uses a limited number of values.
B. The digital signal is less affected by noise.
Hence,options A and B are correct.
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A wave has a frequency of 1000 Hz. If the wavelength is 0.5 m, how fast is the wave
traveling?
Answer: 1000 Hz · 0,5 m = 500 m/s
Explanation: speed = frequency · wavelength
Acceleration is proportional to mass. T or F
Answer:
T....................
derp derp derp chicken strips don't answer lol i just want to be here.
Answer:
ok lol
Explanation:
ok but I will still answer
Answer:daddy
Explanation:
a car's horn is honking at a constant frequency. as the car is driving away from you the pitch you hear will be ______ what is heard by the driver of the car
A. lower than
B. higher than
C. the same as
D. exactly twice
Answer:
Easy
Explanation:
A; lowe than
A baby carriage is sitting at the top of a hill that is 35 m high. The
carriage with the baby has a mass of 1.5 Kg. What is the potential
energy?
Answer:
[tex]\boxed {\boxed {\sf E_p= 515.025 \ J}}[/tex]
Explanation:
Potential energy is found using this formula:
[tex]E_p= mgh[/tex]
The mass of the baby in the carriage is 1.5 kilograms and the height is 35 meters. Assuming this is on Earth, the gravitational acceleration is 9.81 meters per square second.
[tex]m=1.5 \ kg \\g= 9.81 \ m/s^2\\h= 35 \ m[/tex]
Substitute the values into the formula.
[tex]E_p= (1.5 \ kg )( 9.81 \ m/s^2)(35 \ m )[/tex]
Multiply the first numbers together.
[tex]E_p= 14.715 \ kg*m/s^2 (35 \ m )[/tex]
Multiply again.
[tex]E_p= 515.025 \ kg*m^2/s^2[/tex]
1 kilogram square meter per square second is equal to 1 Joule.Our answer of 515.025 kg*m²/s² is equal to 515.025 J[tex]E_p= 515.025 \ J[/tex]
The potential energy is 515.025 Joules.
An air conditioner with a resistance of 50.0 Omega(R1) and a computer with a resistance of 20.0(R) are connected in parallel to a 120.0-V source through a 2.00-0 resistor (R3) series, as shown below. Find the current through the computer when the air conditioner is on and when is off
Answer:
the value of current will be 6A for the both case.
Explanation:
the voltage difference between two sides of the computer will be 120V .it will not depend on while the conditioner is on or off. so for the both case it will be same.
as we know current I=V/R
so for the both case I=120/20=6(ans)
psychology is the study of which kind of human and animal behavior and mental processes?
A. subjective
B. observable
C. imagined
What happens when you throw a basketball up toward the hoop? If you are lucky, the ball sinks into the net. You score two points before the ball drops down to the ground. The basketball isn’t heavy. Why doesn’t it stay up in the air when you throw it? Have you ever heard the saying, What goes up must come down? This saying helps explain what happens to the basketball. It is being acted on by an invisible force called gravity. Gravity is the force in the universe that attracts all objects to each other.
Gravity has existed since the beginning of the universe. It holds everything in the universe in place. We know it is always there. It is hard to understand how it works. First, you need to understand that there is gravitational attraction between all objects. There is gravitational attraction between you and Earth, between Earth and the Moon, and between Earth and the Sun. You cant feel the gravitational attraction between you and Earth. However, it is what keeps your feet planted firmly on the ground. Imagine spinning around and around on a merry-go-round. As long as you hold on, you will stay on the merry-go-round. Don’t let go! You will fly off and land on the ground. This analogy helps us visualize the gravitational attraction between Earth and you. Earth is spinning on its axis. Gravity keeps you on Earth rather than flying out into space.
Now think about the gravitational attraction between Earth and the Moon. The same force that keeps you on Earth pulls the Moon and Earth together. This attraction keeps the Moon in orbit around Earth. Also think about the affect of the Moons gravitational force on Earths oceans. The gravitational pull of the Moon makes the ocean tides rise and fall.
There is attraction between you and Earth and between the Moon and Earth. The Sun also has a gravitational pull on Earth. This attraction makes the Earth orbit the Sun. The Suns attraction is very strong. All objects in the solar system orbit around this medium-sized star. What would happen if the Suns gravitational attraction suddenly disappeared? All the planets, including Earth, would fly off into space just like you would if you let go of the merry-go-round.
There is gravitational attraction between all objects. Why is the effect stronger in some cases? For example, Earths gravity has a more powerful effect on you than the Suns gravity. How could this be possible? After all, the Suns gravitational attraction holds all of the objects in the solar system. The force of gravity between two objects actually depends on two things. It depends on the mass of the two objects. It also depends on the distances between them. The greater the mass of the objects, the greater the gravitational force between them. In other words, the bigger an object is, the more gravity it has. Distance also has a large effect. The closer objects are to each other, the stronger their gravitational force of attraction. As they get farther apart, the force between them gets weaker. The Sun is much more massive than Earth, but the distance between you and Earth is less. The gravitational pull of the Sun has little effect on you because the distance is so large.
Gravity is the invisible force that attracts all objects, no matter their size or mass. The Sun has the strongest gravitational force of any object in the solar system. It attracts all astronomical objects into orbit around itself. Without this force, everything would fly off into the universe.
Which of the following summaries expresses the main points of the passage best?
Group of answer choices
I believe gravity is the most important aspect of our universe. Without it we would all be floating off into the universe. There wouldn’t be any orbits; instead, all planetary bodies would simply float around, running into each other when they crossed paths and just wandering forever.
There is a gravitational force between all objects in the universe. Gravitational force is what keeps all components of our solar system in orbit around the Sun, as well as moons in orbit around planets. The force of gravity affects Earth's tides and holds us on Earth's surface. The force of gravity between objects depends on their masses and the distance between them.
Gravity is hard to understand and scientists have little to no understanding of how it works. We know that gravity is out there, but the specifics are often lost on us. Plants, animals, and humans are all able to grow tall due to the pull on Earth from the Sun. Without the Sun we would all just stretch out along Earth's surface.
None of the above
Answer:
What happens when you throw a basketball up
toward the hoop? If you are lucky, the ball sinks
into the net, scoring two points before dropping
back down to the ground. The basketball isn’t
that heavy, so why doesn’t it stay up in the air
when you throw it? Have you ever heard thesaying, “What comes up must come down”?
This saying is a simple explanation for what
causes the basketball to fall back to the ground.
It is being acted on by an invisible force called
gravity, which is the basic force in the universe
that attracts all objects to each other.
1 Gravity has existed since the beginning of the universe. It is hard to understand how or why it
works, but we know it is always there because it holds everything in the universe in place. First,
you need to understand that there is a gravitational attraction between you and Earth, between
Earth and the Moon, and between Earth and the Sun. Even though you can’t feel it, the
gravitational attraction between you and Earth is what keeps your feet planted firmly on the
ground. Imagine spinning around and around on a merry-go-round. As long as you are holding
on, then you stay on the merry-go-round, but if you ever let go, you will fly off and land on the
ground. This is a useful analogy in visualizing the gravitational attraction between Earth and
you. Earth is spinning on its axis and thanks to gravity, you are held to your position on Eart
rather than flying out into space. Explanation: this is what i can do!:)
Answer:
I believe gravity is the most important aspect of our universe. Without it we would all be floating off into the universe. There wouldn’t be any orbits; instead, all planetary bodies would simply float around, running into each other when they crossed paths and just wandering forever.
Explanation:
this is the best match
Look at the diagram below. What is the size of the overall force on the boat?
Enter your answer as a number
N
30 N
45 N
Please help/ show work !!! Also don’t answer by putting a link!!
A student draws a distance verses time graph to describe the motion of a model train. What does a
horizontal section of the graph indicate about the motion of the train?
Can someone please give me this answe
Answer:
B
Explanation:
Generally, longer wavelengths have less energy than shorter wavelengths because the higher the frequency, the shorter the wavelength. Since radio waves have longer wavelengths than visible light, the correct answer should be B.
explain how the weight of a body changes as the body is taken farther away from the surface of the earth
The weight of a body is dependent on the gravitational force of its location.
WEIGHT:Weight is a force measured in Newton. It is often used interchangeably with mass, however, they are very different.
Weight refers to the mass of an object or body in relation to gravity. This means that gravity determines the weight of an object.
Weight changes as the gravitational force changes. This means that if a body is taken farther away from the surface of the earth, the weight changes because the gravitational force determines weight.
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the magnetic flux density of a given conductor is 3.6T. Given that the conductor generates 12.9N and has a length of 10cm, calculate the current being carried
Answer:
i = 5.28 A
Explanation:
The magnetic force is given by the expression
F = i l x B
the bold letters indicate vectors, let's write the modulus of that expression, where the direction between the conductor and the magnetic field is 90º, therefore the sine 90 = 1
F = i l B
i = F / l B
let's reduce the length to the SI system
l = 10 cm (1m / 100 cm) = 0.10 m
let's calculate
i = 12.9 / 0.1 3.6
i = 5.28 A
Bob is hanging a pot of water over his campfire to boil water for instant ramen. Which method(s) of heat transfer produce the hot water?
Question 5 options:
A. radiation
B. conduction
C. radiation & conduction & convection
D. radiation & convection
E. radiation & conduction
F. convection
The answer would be ( F.)
Convection is the main method of heat transfer in fluids such as water and air.
What is the mass of an object moving at a speed of 9.0 m/s with a kinetic energy of 320 J?
Group of answer choices
71 kg
0.51 kg
2.0 kg
4.0 kg
7.9 kg
Answer:
4
Explanation:
calculator the gravitational force between two 100 kg objects located 10 m from each other?