Answer:
This powder is sodium chloride. In the second reaction (sulfuric acid with copper(II) oxide) the resulting solution was blue in colour. When this solution was heated a small amount of white powder was noted.
Explanation:
i saw it on quizlet
You had an amazing race. You finished the 300kms race in 1hr 40 minutes. What is the average velocity?
Average Velocity
Level : JHSv = s/t
v = 300 km/(1 hour + 40/60 hour)
v = 300 km/(1.66 hour)
v = 180 km/hour
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Find out which of the following sentences is a false statement. Group of answer choices The potential energy of a pair of positively charged bodies is positive. The potential energy of a pair of oppositely charged bodies is negative. The total work required to assemble a collection of discrete charges is the electrostatic potential energy of the system. The potential energy of a pair of negatively charged bodies is negative. The potential energy of a pair of oppositely charged bodies is positive.
The statements which are false from the choices above are:
The potential energy of a pair of negatively charged bodies is negativeThe potential energy of a pair of oppositely charged bodies is positiveIn scenarios of like charges, the potential energy is always positive, that is because we need to put energy in the system to bring like charges closer together.
Conversely, for unlike charges, the potential energy of the pair of unlike charges is negative, as a result of the energy expended by the system in pushing the charges away from each other.
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Over the 10 second period, how far does Juan run?
Answer:
C. 10
Explanation:
On the graph you can see that at the 10 second mark it is at the 10 meters mark as well.
Weight of an object remains same on the Earth and the Moon.
true or false?
If the strength of the sun's magnetic field decreased from its current level, why would the temperature of sunspots increase?
Magnetic field lines emerge from one sunspot and re-enter at the other spot. Also, there are more sunspots during periods of increased magnetic activity. At ...
The temperature of sunspots increases because magnetic field lines emerge from one sunspot and reappear in another. During periods of increased magnetic activity, there are also more sunspots.
What is the sun's magnetic field?The magnetic field of the sun has two poles, similar to a bar magnet. Every 11 years, at the peak of the solar activity cycle, the poles flip.
The magnetic field is carried away from the sun's surface and through the solar system by a solar wind made up of charged particles. The sun is more like a fluid than a solid ball.
Thus, the magnetic field lines emerge from one sunspot and reappear in another. During periods of increased magnetic activity, there are also more sunspots.
Learn more about sun's magnetic field
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8. What is generated by the movement of tiny particles within an object? *
(2 Points)
endothermic
exothermic
heat
thermal
Answer: Thermal Energy
Explanation: I know this answer is correct because I had to look in my notebook for the definition
In my own words: Thermal Energy is the energy coming from heat which means it is generated by the movement of tiny particles with different objects.
Hope this helps! :)
Help on 27 and 28 thanks and pleasee
Answer:
27. 2nd Law of Motion ✔
28. 3 N ✔
Explanation:
27.
1st Law Of Motion
Force = 0 (not moves)2nd Law of Motion
Force = mass × acceleration (moves)3rd Law Of Motion
Force of Action = - Force of Reaction28.
'Cause force in the other direction, the net force is :
F = 10 N - 7 N
F = 3 N
Vengo una ves en un minuto dos veces en un momento pero no vengo en diez años Ayudaaaaaaa
Answer:
La letra "m"
Explanation:
An example of the law of gravity being applied is
Basketball dropping
Bike going off a jump
A diver pushing off a diving board
A flying disc being passed between two people
Brainliest! :)
Please complete the following:
You and Tim, who is larger than you, are outside with a wagon. Tim (the bigger person) gets in the wagon and you (the smaller one) pull it. As you pull it, you accelerate until you reach a comfortable velocity. Then you stop and switch places with Tim. Tim now pulls you in the wagon, accelerating from a stop to a comfortable velocity. Now, Tim may be bigger than you, but you have been working out and are just as strong as Tim, so the force that Tim uses to pull the wagon is the same force that you used. You both pull with the exact same amount of force. Who was riding in the wagon when it had the greatest acceleration during start up? Why? Use Newton’s second law to explain.
Now Sara comes along, and she is the exact same size as you. However, she is even stronger than you! When she pulls you in the wagon, she pulls with a greater force than when you pull her. Now who is in the wagon when it has the greatest acceleration? Explain, using Newton’s second law.
Answer:
First scenario,
From 2nd Newton's law
F = ma
from the above eqn, it's evident
a = F/m
that is to say, acceleration is inversely proportional to mass
The greater the mass, the smaller the acceleration and the higher the acceleration, the smaller the mass.
Thus, You was in the wagon when it had the greatest acceleration because You has the smaller mass and thus the acceleration will be greater.
Second scenario,
Since Sara pulls with greater force and Force is directly proportional to acceleration according to the second Newton's law,
F = ma
then, when You is in the wagon it had greater acceleration since they have the same mass.
All the best!
7. A 77 kg girl and a 62 kg boy face each other on friction free roller skates. The girl pushes the boy, who moves away at a speed of 2.5 m/s. What is the girl's speed?
Answer:
[tex]\sf\longmapsto \: 2.0m/s[/tex]
Explanation:
Initial momentum = 0
[tex]\sf\longmapsto \: 77 \: velocity + 62 \times 2.5 = 0[/tex]
[tex]\sf\longmapsto \: 77 \: velocity = - 155[/tex]
[tex]\sf\longmapsto \: velocity = \frac{ - 155}{77} [/tex]
[tex]\sf\longmapsto \: \: velocity = - 2.012[/tex]
[tex]\sf\longmapsto \: 2.0 \: m/ s[/tex]
How does the suns energy contibute to the movement of water in the water cycle
Explanation:
The sun is what makes the water cycle work. The sun provides what almost everything on Earth needs to go—energy, or heat. Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds... clouds that move over the globe and drop rain and snow.
Answer:
"The sun is what makes the water cycle work. ... Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds... clouds that move over the globe and drop rain and snow. This process is a large part of the water cycle."
Explanation:
in 10 minutes a heart can beat 700 times at this rate in how many minutes will a heart beat 140 times at what rate can a heart beat
The drawing shows a person looking at a building on top of which an antenna is mounted. The horizontal distance between the person’s eyes and the building is 85.5 m. In part a the person is looking at the base of the antenna, and his line of sight makes an angle of 38.9o with the horizontal. In part b the person is looking at the top of the antenna, and his line of sight makes an angle of 41.6o with the horizontal. How tall is the antenna?
A car parked on level pavement exerts a force of 10,000 newtons on the ground. What force does the pavement exert back on the car?
(F = ma, g = 9.81 m/s2)
A.2,500 newtons
B.10,000 newtons
C.10,000 kilograms
D.0 newtons
Answer:
B.
Explanation:
When equal forces are exerted onto eachother, they are exerting equal pressure since they are stationary.
Question 1
A) Which sentence about galaxies provides evidence of universe expansion that supports the Big Bang Theory?(1 point)
Galaxies are moving away from each other.
Galaxies are in constant motion.
Galaxies are moving at different speeds and in different directions.
Galaxies are moving more slowly than they have in the past.
Question 2
A) Which provides evidence of universe expansion that supports the Big Bang Theory? Select the three correct answers.(2 points)
The temperature of the universe is increasing.
An enormous amount of weak background radiation has been detected in the universe.
The temperature of Cosmic Microwave Background radiation varies widely from one part of the universe to another.
Galaxies are moving away from each other.
The temperature of the universe is decreasing.
The universe is undergoing a cycle of contraction and expansion.
Question 3
A) Which is evidence of universe expansion that supports the Big Bang Theory?(1 point)
The temperature of the universe has cooled and warmed repeatedly over time.
The temperature of the universe has warmed over time.
The temperature of the universe is the same as it was at the time of the Big Bang.
The temperature of the universe has cooled over time.
The characteristics of the Big Bang allow you to find the correct answers for the different questions are:
1. The galaxies are moving away from each other.
2. There is a large amount of weak background radiation in the universe
The galaxies are moving away from each other The temperature of the universe is decreasing3. The temperature of the universe has cooled over time
The Big Bang model says that initially the universe was born from a great initial explosion about 14 10⁹ years ago, with this idea several facts arise:
The galaxies after their formation must be in a constant expansion There must be an energy in the entire universe remaining from the big explosion As the energy is constant, the energy per unit volume must decrease, consequently the temperature of the universe must be decreasing.
Let's apply these ideas to the different questions, to find the correct answers.
1) What phrase about galaxies provides evidence of the expansion of the universe proposed by the Big Bang
the correct answer is:
The galaxies are moving away from each other.
As there is no friction, the initial forces create a speed in the galaxies, therefore they must move away from each other at this speed
2) What phrases give evidence of the expansion of the universe
the correct answer is:
There is a large amount of weak background radiation in the universe The galaxies are moving away from each other The temperature of the universe is decreasing
3) What evidence of expansion
The temperature of the universe has cooled over time
In conclusion with the characteristics of the Big Bang we can find the correct answers for the different questions are:
1. The galaxies are moving away from each other.
2. There is a large amount of weak background radiation in the universe
The galaxies are moving away from each other The temperature of the universe is decreasing3. The temperature of the universe has cooled over time
Learn more here: brainly.com/question/954190
i need working steps and answers
Explanation:
I will definitely explain you if you follow me please
Since the bullets also have zero velocity, a more exact description of the bullet's state would be _____.
Answer:
Static equilibrium.
Explanation:
một viên đạn được bắn lên với vận tốc v0=800m/s theo phương hợp với mặt phẳng nằm ngang một góc 30 độ. xác định tầm xa của viên đạn
Step 1 First Draw a Diagram.
Step 2 Identify the givens
g= -9.8 m/sec2
x0 = 0 m
Y-Yo= 80m
V0 = 800m/s -30o inclined from horizontal
Xf= ?
t = ?
Step 3 * A 2 dimensional problem so break it down into x component and y component
Step 4 x component
x= [Vox ][cos 30o][t]
x= [800m/s][cos 30o][tsec]
x=[692.8m/s][tsec] <---------------Need t
Step 5 y component
Y-Yo= Voy - 1/2gt2
80m= -[v][sin30o][t] -1/2gt2
1/2gt2+[v][sin30o][t]+80m=0 <-------Form Quadratic Equation
Solve for t
t= -[v sin 30] +/- [(v sin 30)-(4)(1/2)(9.8)(80)]1/2
(2)(1/2)(9.8)
t= 400+/- 398
9.8
t= 0.2 sec
Step 6 Plug this into initial x component equation
x=[692.8m/s][tsec]
in loading a long lorry a man lifts boxes each of weight 100N and height of 1.5M.how much energy is transfered when one box is lifted
Explanation:
energy=100×1.5=150 joules
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
Helppppppppppppppp please and explain!
a ray of light is incident in water at angle of 30 on water air plane mirror surface .find the angle of refraction in air.
Angle of incidence=angle of refraction
[tex]\\ \sf\longmapsto sin\:i=sin\:r[/tex]
sin i=30°[tex]\\ \sf\longmapsto sin\:r=30°[/tex]
Question 6 (3 points)
A high school has a football field that is exactly east-west from end zone to end zone. Football fields are 53.333 yards wide. Starting at the
southwest corner of the field, you walk to the north end of the western 30 yard line. What is the vector (magnitude and angle) of your
displacement? Round to the nearest yard and nearest degree. Make sure you label the angle with the direction (N, S, NE, NW, etc.)
Magnitude:
yards
Angle:
Blank 1:
Blank 2:
Blank 3:
Answer:
52355236552255558654
[tex].. { {.y = 392.6. = }^{ + 36yjsss} }^{?} jmijjdrk{am \: {}{}s[/tex]
Why might a scientist use a physical model of a plant cell instead of studying
a cell directly?
A. A model can be used for things that are too hot to handle easily.
B. A model can be used for things that are too small to see clearly.
C. A model can be used for things that are too large to study directly.
D. A model can be used for things that are too simple to study
directly
B. A model can be used for things that are too small to see clearly
A car accelerates at 4 m/s/s from rest. What is the car's velocity after 5 seconds?
Answer:
3m/sec
Explanation
V=u+at
23=u+4*5
23=u+20
23-20=u
U=3m/sec
Which statement is true?
A. Speed is a scalar quantity and velocity is a vector quantity.
B. Speed and velocity are both scalar quantities.
C. Speed and velocity are both vector quantities.
D. Speed is a vector quantity and velocity is a scalar quantity.
E. Speed and velocity are neither a scalar quantity nor a vector quantity.
Help! Especially from any PLATO users!
A ) Speed is a scalar quantity and velocity is a vector quantity.
ACTIVITY 1: Research a Famous Chemist or Physicist
1) Do research on a famous chemist or physicist. Write a 300-500 word essay one of them. Use at least three different sources. Sources can include biographies, internet articles from universities, or journal articles. Wikipedia is not an acceptable source information.
Be sure to answer these questions:
* What did this scientist discover?
* How was it discovered?
* How does this discovery or invention impact the world today?
(Scientist: Nikola Tesla)
Answer:
What did this scientist discover?
Nikola Tesla discovered and created Bluetooth back in 19, November 5, 1898.
"The Transmission of Electrical Energy Without Wires", Electrical World and Engineer, January 7, 1905. Tesla, Nikola, World System of Wireless Transmission of Energy, Telegraph and Telegraph Age, October 16, 1927.
How was it discovered?
In 1901 Tesla began his work of a large high-voltage wireless energy transmission station called the Wardenclyffe Tower. ... Some devices already employ wireless energy transfer without the use of metal contacts. The power is transferred through the plastic cases using magnetic induction.
How does this discovery or invention impact the world today?
It changed the new age by listening to music with wireless earbuds.
PLEASE HELP ASAPPPPPPPPPPPPPPPPPPP
Answer:
Basketball
Explanation:
Im asuming basketball because a basketball has the least movement out of the rest of the answers.
a raw egg and a hard boiled egg are rotating about the same axis of rotation with the same initial angular velocity. with the aid of diagram, explain which egg will rotate longer
Answer:
Boiled egg rolls slower than a raw egg , because it has a higher moment of inertia than a raw egg . In order to conserve angular momentum , the angular velocity of the boiled egg decreases.The hard boiled egg moves as if it was one solid unit. The raw egg has a solid shell but various types of fluids inside that can move independently of the shell. When you turn the egg to cause it to spin this rotating or turning force is called a torque. How the boiled egg spins? The rotating force on the shell of the hard boiled egg spins the entire egg –shell and content because the content is solid and moves when the shell moves. This egg easily spins and spins longer than does the raw egg.Explanation:
Hence, Boiled egg spins longer than raw egg.