Answer:
stop telling the teacher your secrets and talk to her about it be like "hey i opened up to you because i trusted you and you broke that trust i wanted someone to talk to but you told my parents and to me i find that very rude."
Something like that if you want
Explanation:
a 30 kg cart is travelling in a zero friction environment at a constant velocity of 5m/s. It's about to go up a very steep hill. How high will the cart be when the velocity changes to zero? PLEASE HELP
Answer:
1.27551m
Explanation:
This is a simple energy convertion problem. Since there is no friction, and assuming no air drag and other external factors, mechanical energy should be conserved in this system.
Thus, we get:
[tex]KE_{initial} + PE_{initial} = KE_{final} + PE_{final}[/tex]
We also know that the gravitational potential energy is equal to mgh, while the KE can be calculated using [tex]\frac{1}{2}mv^2[/tex]
One thing to note here, is that the final KE will be 0, as there is no velocity at the end. Furthermore, we also can set the initial PE as 0 as we are looking at relative height, and at the start it is at h=0.
[tex]KE_{initial} = PE_{final}[/tex]
Plugging in:
[tex]\frac{1}{2}*30*5^2 = 30*9.8*h[/tex]
Solving for h, we get 1.27551m
Describe the components of the universe.
3-4 sentences
Answer:
The Universe is thought to consist of three types of substance: normal matter, 'dark matter' and 'dark energy'. Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe.
Explanation:
Answer:
Hey mate....
Explanation:
This is ur answer.....
According the NASA's StarChild Website, "The universe is a vast open space which contains all of the matter and energy in existence. The universe contains all of the galaxies, nebulae, stars, and planets. The exact size of the universe is unknown. Scientists believe the universe is still expanding outward.
The Universe is thought to consist of three types of substance: normal matter, 'dark matter' and 'dark energy'. Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe.
Hope it helps u,
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2. 3000. kg car is moving across level ground at 5.0 m/s when it begins an
acceleration that ends with the car moving at 15.0 m/s. Is work done in this
situation? How do you know?
Answer:
yes
Explanation: Work is done when there is movement. Therefore it was work was being done.
Two charges of 5 x 10-6 C are a certain distance apart. These two positive charges experience 3.6 N of repelling electrical force between them. How far apart are these charges?
Answer:
25 cm
Explanation:
F = k q₁q₂/r²
Substituting values : let the distance be x.
3.6 = (9 x 10^9) (5 x 10^(-6) (5 x 10^(-6)) / x²
3.6 = (225 x 10^(9-6-6) )/x²
3.6 = (225 x 10^(-3) / x²
x² = 225/3.6 x 10^(-3)
x² = 62.5x10x10^(-4) [10^(-3)=10x10^(-4)]
x = √(625 x 10^(-4) )
x = 25 x 10^(-2)
Or, x = 25 cm
How do you think heat gets from a filament to the kernel?
Answer:
Explanation:
It goes thru the fluma
8. Calculate the impulse of a 14kg rock that starts at rest and falls to a speed of 6m/s?
Answer:
84 kgm/s
Explanation:
mvf - mvi = impulse
(14kg)(6m/s) - (14kg)(0m/s) = 84 kgm/s
which best describes nuclear fission?
Answer:
Third option: "A nucleus collides with a neutron and splits, releasing energy."
Explanation:
When nucleus that collides with a neutron splits (fission) releases energy in the process. This is a case of fission.
This is how a fission nuclear reactor works.
Answer:
It be C
Explanation:
Right on edg
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
A ball with a mass of .012 kg moving at 15.0 m/s collides with a second ball with a mass of 36 g
moving at 5.0 m/s. After the collision, the 12 g ball moves in the same direction at 6.0 m/s. What
is the resulting velocity of the 36 g ball????
Answer:
Solve:
1/2(.5)(36)+1/2(1)(144)=
1/2(.5)(196)+1/2(1)(x^2)
9+72=49+.5x^2
81=49+.5x^2
32=.5x^2
64=x^2
x=8 m/s
Thus, the speed of the second ball after the collision is 8 m/s.
Hope this helps! Good luck!
Identify the TRUE statements about energy.
A; Energy can transform from electrical energy to heat.
B; Energy can be created and destroyed.
C; Higher potential energy can change into higher kinetic energy.
D; Energy changes are 100% efficient.
Answer:
A, C, D
Explanation:
A, C and D are true.
B is false as energy can neither be created nor destroyed.
Which of the following statements about mechanical energy is NOT true?
O Gravitational potential energy is a type of mechanical energy.
Kinetic energy is a type of mechanical energy.
O Mechanical energy is the energy an object possesses due to its motion or its position.
O A bungee cord is not an example of mechanical energy.
What does the following figure illustrate?
A. Diffraction
B. Refraction
C. Resonance
D. Interference
Answer:
the answer would be c sry if it is wrong
Circle the letter of each sentence that is true about calculating the
acceleration of a moving object.
A.) If an object is moving without changing direction, then its acceleration is the change in its speed during one unit of time.
B.) If an object's speed changes by the same amount during each unit of
time, then the acceleration of the object at any time is the same.
C.) To determine the acceleration of an object, you must calculate the
change in velocity during only one unit of time.
D.) If an object's acceleration varies, then you can describe only average
acceleration.
Answer: D
Explanation:
which scientists describes an atom as a mass of positive charges containing negative electrons
Answer:
it was Ernest Rutherford
I should limit the number of carbohydrates leat, as often as possible, to avoid gaining weight. * 2 True O False
Answer:
I THINK it's True
Explanation:
Because...
you can get fat...
When the north poles of two magnets are kept close , they will __________
attract
rotate
repel
remain unaffected
How many calories are produced when 50 ml of water is raised from 22 degrees celsius to 52 degrees celsius?
Help it’s due today
Answer:1500 calorie
Explanation:
Given
volume of water [tex]V=50\ ml[/tex]
Initial temperature [tex]T_i=22^{\circ}C[/tex]
Final temperature [tex]T_f=52^{\circ}C[/tex]
We know,
specific heat of water is [tex]c=1\ calorie/gm-^{\circ}C[/tex]
the density of water is [tex]\rho=1\ gm/ml[/tex]
The heat required to raise the temperature
[tex]\Rightarrow Q=mc\Delta T\\\Rightarrow Q=\rho \cdot V\times c\times \Delta T\\\Rightarrow Q=1\times 50\times 1\times (52-22)\\\Rightarrow Q=1500\ cal.[/tex]
1500 calories is required
In which area of a street should cyclists ride?
Answer:
the same side as cars are traveling
:)
What is the origin of cold, wet air masses?
A. Over water in tropical zones
B. Over land in polar regions
C. Over land in tropical areas
D. Over water in polar regions
Answer:
b
Explanation:
if it's over land and in polar region it's B
Answer:D
Explanation:
trust me
You want to create a space station that is 50 meters in radius. If you want it to simulate Earth's gravitation, how fast must it go?
Answer:
w = 0.196 rad / s
Explanation:
To generate an acceleration similar to that of the earth, the station's centripetal acceleration must be equal to the acceleration due to gravity.
a_c = v² / r = w² r
a_c = g
we substitute
g = w² r
w² = g / r
w = [tex]\sqrt { \frac{g}{r} }[/tex]
let's calculate
w = √9.8/50
w = 0.196 rad / s
therefore the station must rotate at that angular velocity so that the acceleration in the outer wall is equal to the ratio of gravity
When do scholars think kites were invented?
A. 2000 AD
B. 1000 BC
C. 12,000 BC
D. Never, there's no such thing as a kite
Answer:
kites where invented 2000 AD
so its A. 2000 AD
srry if it's wrong
Answer:
I guess no. A
Explanation:
approximately 2,800 years ago.
What is Justice according to philosophy
Answer:
justice. just in nature.
Explanation:
the concept of a proper proportion between a person's deserts (what is merited) and the good and bad things that befall or are allotted to him or her. ... Aristotle's discussion of the virtue of justice has been the starting point for almost all Western accounts.
How many antinodes are present in harmonic 3
Answer:
a total of four nodes and three antinodes
Explanation:
please tell me if im incorrect i will fix it asap.
A semi-truck as mass of 40 000 kg and is traveling at 80.0 km/h, south. What is
it's momentum? *
A. 210,000 kg m/s
B. 880,000 kg m/s
C. 3,200,000 kg m/s
D. 440,000 kg m/s
The potential energy of a 45 kg cannon ball is 15000 J. How high was
the cannon ball to have this much potential energy?
Answer:
33.3
Explanation:
Potential energy =
mass × gravitational field strength × height
rearranged =
[tex] \frac{potential \ energy}{mass \: \times gravity} = height[/tex]
[tex] \frac{15000}{45 \times 10} [/tex]
(The earths gravitational field strength will always be 10)
=33.33333 recurring to 1dp its 33.3
Body language is (peer counseling)
the way you make words with your hands
the way you make words by nodding your head
the way you speak by blinking your eyes tightly
the way you speak with your entire body
Answer:
the way you speak with your entire body
Explanation:
Body language is the way you speak with your entire body. Therefore, the correct option is option D.
What is body language?Body language refers to a form of communications in which information is expressed or conveyed via bodily behaviors rather than words. Face expressions, body posture, movements, eye movement, touch, and use of space are examples of this type of behavior.
Although the phrase "body language" is typically used in reference to people, it can also be used in reference to animals. Kinesics, another name for the research of body language, is related. Although facial expression is a crucial component of communication, much of it occurs subconsciously. Body language is the way you speak with your entire body.
Therefore, the correct option is option D.
To know more about body language, here:
https://brainly.com/question/14759337
#SPJ2
True or false- it is possible for a given substance to absorb one frequency of light and reflect a different frequency.
Answer:
FALSE
Explanation:
To answer this question we must clarify that for a given approach to exist there must be a transition between two atomic levels of the material.
For the emission, the transition between two determined states must also occur, therefore the radiation emitted is equal to that absorbed.
Consequently the statement is False
What forces are acting on a heavy box sitting stationary on the floor?
Which facility relies on a no renewable source of energy
Answer:
Coal
Explanation:
Temperature of an object is 250 K. Find its temperature in centigrade.
help me in this assignment
Answer:
T = 526°C
Explanation:
Given the following data;
Temperature in Kelvin = 250K
To convert kelvin to centigrade;
Temperature can be defined as a measure of the degree of coldness or hotness of a physical object. It is measured with a thermometer and its units are Celsius (°C), Kelvin (K) and Fahrenheit (°F)
Mathematically, it is given by the formula;
250 = 273 + C
Substituting into the equation, we have;
C = 273 + 250
T = 526°C
Choose the way that machine may change force...
Doc Below
fjfjfj
Explanation:
rufifiriirifieif
Answer:it’s all of the above for the ck-12
Explanation: