Answer:
See explanation
Explanation:
Nuclear energy refers to energy trapped in the nucleus of atoms. Nuclear energy holds the greatest promise for large scale electricity generation. For instance, the amount of energy released by a given mass of uranium is 2.5 million times the energy released by combustion of an equal mass of carbon.One gram of uranium produces the same energy as 1 ton of coal, 17000 cubic feet of natural gas, 5000 pounds of wood and 149 gallons of oil.
Nuclear energy does not pollute the atmosphere as fossil fuels do. However, the challenges of effective control of the nuclear reactor and disposal of radioactive waste still remain a serious concern.
However, exploitation of nuclear energy as a source of electricity remain expensive and it is not quite easy to set up a nuclear power plant. Not many countries can afford to pay for the services of experts who operate nuclear energy plants talk more of providing the required equipment.
Irene drops a clay ball at time t=0. The ball stops when it hits the ground. Which of the following graphs best shows the velocity v of the clay ball from when it is dropped until it hits the ground?
Answer:
Graph-
Explanation:
The graph best shows the velocity v of the clay ball from when it is dropped until it hits the ground is attached below.
What is velocity?Velocity is the time rate of change of displacement. The displacement and velocity both are vector quantities. They represent magnitude and direction as well.
Irene drops a clay ball at time t=0. The ball stops when it hits the ground.
When the clay ball drops, only force acting is due to acceleration due to gravity.
The velocity of the clay ball decreases with the time.
Thus, the graph best shows the velocity v of the clay ball from when it is dropped until it hits the ground is attached.
Learn more about velocity.
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A train car has a mass of 10,000 kg and is moving at +3.0 m/s. It strikes an identical train car that is at rest. The train cars combine.
Answer:
ok what is the question
Answer:
If the question is what is the magnitude of the final velocity of the combined cars ? Answer: 1.5 m/s
Explanation:
She wants to travel back to Madison by train. The distance from Chicago to Madison is 147 miles and takes 2.47 hours. If she makes no stops, what is her average speed?
Answer:
59.51 mph.
Explanation:
The following data were obtained from the question:
Distance (d) = 147 miles
Time (t) = 2.47 hours.
Speed (S) =?
Speed is defined as the distance travelled per unit time. Mathematically, it is expressed as:
Speed (S) = Distance (d) / time (t)
S = d/t
With the above formula, we can obtain the speed of the girl as illustrated below:
Distance (d) = 147 miles
Time (t) = 2.47 hours.
Speed (S) =?
S = d/t
S = 147 miles / 2.47 hours.
S = 59.51 miles per hour (mph)
Thus, the speed of the girl is 59.51 mph.
What is its speed if it takes 0.5 seconds to cover the distance?
Answer:How far is the distance?
Explanation:
A foam square has a mass of 62 g and a volume of 72 cm3. What is the density?
Answer:
36cm
Explanation:
THIS IS MY THIRD TIME ASKING THIS QUESTION
Byron measured the mass of a bag of cookies that he bought at the store and found that they were 45 grams. He set the cookies on the counter, but his little brother found them. His brother could not get the bag open so he smashed them to little pieces. What could Byron expect to find when he measured the mass of the cookies again?
Group of answer choices
They would be more than 45 grams since there are more pieces.
They would be 45 grams since they have the same mass.
They would be less than 45 grams since they were in little pieces.
The mass of the cookies would been reduced by 5 grams.
Answer:
They would be 45 grams since they have the same mass
Explanation:
If you like to venture further, feel free to check out my insta (learntionary). I'll be constantly posting math tips and notes! Thanks!
Why magnet is more powerful in poles than middle?
Answer:
The magnetic force or attraction is is greater where the field lines are crowded. Since all the magnetic field lines generate from the poles, the crowd of field lines is maximum near pole.
A box at rest is in a state of equilibrium half way up on a ramp. The ramp has an incline of 42°. What is the force of
static friction acting on the box if box has a gravitational force of 112.1 N ?
0 70 N
O 80 N
O 75 N
O 85 N
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Answer:
The correct option is;
75 N
Explanation:
The given parameters are;
The angle of inclination of the ramp, θ = 42°
The gravitational force of the box = m × g = 112.1 N
Let [tex]F_f[/tex] represent the force of static friction acting on the box
Given that the box is at rest, we have
The component of the gravitational force acting along the inclined plane = The force of static friction acting on the box, [tex]F_f[/tex]
We have that the component of the gravitational force acting along the inclined plane = m × g × sin (θ) = [tex]F_f[/tex]
[tex]F_f[/tex] = m × g × sin (θ)
Substituting the values, gives;
[tex]F_f[/tex] = 112.1 × sin (42°) ≈ 75.0095409728
∴ The force of static friction acting on the box = [tex]F_f[/tex] ≈ 75 N
Answer:
C: 75N
Explanation:
The diagram below shows a wave with its wavelength indicated in red.
wavelength
What will happen to the wave's frequency if its wavelength is made twice as long?
A. It will stay the same.
B. It will go to zero
C. It will double.
D. It will decrease
Answer:
answer is D.it will decrease
Answer:
D. It will decrease
Explanation: Study island ;)
Memories
by matthew smith
I remember when I met you
the smile on your face,
Seems like a million years ago -
a different time and place
I remember when I kissed you
the warmth inside my heart,
I thought it'd last a lifetime
I swore we'd never part
I thought about the future
I started making plans,
Forever you'd be my woman
forever I'd be your man
We went together places
so that everyone could see,
The women that I want to share
the rest of my life with me
I told you that I loved you
I told you that I cared,
I told you if you were falling
just look back and I'd be there
I know I didn't have all the answers
sometimes I only guessed,
But, through it all I have to say
"I always tried my best"
I wasn't always perfect
I wasn't always right,
I know sometimes I wasn't
even worthy in your sight
I know I took for granted
the love you had to share,
All I ever wanted was
for you to know I cared
Our lives have changed directions
as sometimes lovers do,
Often time and change
and pave a path that's new
Sometimes I often wondered
just what lies ahead,
Sometimes I'd like to turn back time
and take back what I said
We've both gone different places
we've both gone different ways,
I know sometimes I let you down
when trouble came our way
I know sometimes I did things
you didn't comprehend,
But, through the years and all the tears
our memories will never end........
Answer:
Its ok but the answer is C
Explanation:
according to newtons first law the motion of an object does not change if the net force acting on it is zero
Answer:free coins grinding up get rekts LOl
Explanation:
A bullet is shot from a rifle with a speed of 3,015 feet per second. Assuming the billet moves at a constant velocity what is the time rescuers die the biller to strike a target 4,146 meters away
Answer:
Explanation:
Given
final speed v = 3015ft/s
initial speed = 0m/s
Distance S = 4146m/s
Required
Time
Using the equation of motion to get the time;
S = (v+u)/2 * t
since 1m = 3.28084ft'
4146m = 3.28084 * 4146 = 13,602.36264feet
13,602.36264 = 3015+0/2 * t
13,602.36264 = 1,507.5t
t = 13,602.36264/ 1,507.5
t = 9.023 secs
Hence it will take 9.023 seconds the rescuer die the biller to strike a target
c) Find the kinetic of a ball of mass 200
grams moving at a speed of 20 m/s. [Ans; 20 )]
Solution,
Mass (m): 200 g
velocity (v) = 20 m/s
kinetic Energy (k. E)= ?
We know,
According to the formula,
Answer:
the answer is k.E =0.5
Explanation:
i only think about it and i answer it
Forces start and change the motion of an object. Question 1 options: True False
If the refractive index of water is 1.33, then its critical angle is...
A sled with a mass of 32 kg is being pulled across the snow. If the friction force between the sled and the ground is 12 N, what is the force needed to accelerate the sled at a rate of 1.1 m/s2?
Answer:
Fa= 47.2N
Explanation:
A pitcher throws a 145 g baseball at a velocity of 30.00 m/s. How much kinetic energy does the ball have?
Final Answer:
65.25 J is the kinetic energy that the ball has.
Explanation:
M = 145g
(Reminder: kg must be used in this formula, thus we need to convert 145g to kg)
M = 145g x 1kg/1000g
(cross out g, then multiply 145 to 1kg)
M = 145kg/1000 = 0.145kg
M = 0.145 kg
V = 30.00 m/s
Solution:
KE = 1/2mv^2
KE = 1/2(0.145kg)(30.00m/s)^2
(Square first the velocity)
KE = 1/2(0.145kg)(900.00m^2/s^2)
KE = 1/2(130.5 kg*m^2/s^2)
KE = 65.25 kg*m^2/s^2
(Reminder: 1 kg*m^2/s^2 = 1 J)
KE = 65.25 J
Final Answer:
65.25 J is the kinetic energy that the ball has.
A 120-kg roller coaster cart is being tested on a new track, and a crash-test dummy
is loaded into it. The roller coaster starts from rest at point A which is 25 m above
point B. If the track near to point B is in the shape of a circle with a radius of 15 m,
and the cart is moving at 22 m/s at point B, what centripetal acceleration does the
cart experience at that point?
Answer:
32 m/s².
Explanation:
From the question given above, the following data were obtained:
Mass (m) of cart = 120 Kg
Radius (r) = 15 m
Velocity (v) = 22 m/s
Centripetal acceleration (a) =?
The centripetal acceleration experienced by the cart can be obtained as illustrated below:
a = v²/r
a = 22² / 15
a = 484 / 15
a = 32.27 ≈ 32 m/s²
Thus, the centripetal acceleration experienced by the cart is approximately 32 m/s².
Solve these two please its urgent, If i like your answer ill give brainly....
Answer: green car and red car
Explanation:
Answer:
it is white car for the first question and for the second it goes green slowest and white fastest red is in the middle
the energy transferred by
waves moving through the ground is called
i hope it helped thanks
Se lanza verticalmente hacia arriba un proyectil y alcanza una altura máxima de 100 metros de altura. ¿Cuál fue la velocidad hacia arriba con la que fue lanzada?
Answer:
v = 44,3 m/s
Explanation:
La velocidad la podemos hallar usando la siguiente expresión:
[tex] v_{f}^{2} = v_{0}^{2} - 2gh [/tex]
En donde:
h: es la máxima altura = 100 m
[tex]v_{f}[/tex]: es la velocidad final = 0 (en la altura máxima)
[tex]v_{0}[/tex]: es la velocidad inicial =?
g: es la gravedad = 9,81 m/s²
Resolviendo la ecuación anterior para v₀, tenemos:
[tex] v_{0} = \sqrt{2gh} = \sqrt{2*9,81 m/s^{2}*100 m} = 44,3 m/s [/tex]
Entonces, el proyectil fue lanzado hacia arriba con una velocidad de 44,3 m/s.
Espero que te sea de utilidad!
Which of the following represent an atom from period 3?WILL MARK BRAINLIEST
Answer:
First one
It has 3 orbital
The diagram first represents an atom from period three of the modern periodic table.
How many periods are there in the periodic table?There are seven periods and 18 groups in the periodic table where each element is arranged on the basis of its increasing atomic number.
The atom represents in the diagram first is known as the sodium element. The atomic number of sodium is 11. Its electronic configuration is 2, 8, and 1. It requires three shells for the distribution of electrons. Apart from sodium, other members of period three include magnesium, aluminum, Silicon, Phosphorus, Sulfur, chlorine, and argon.
The diagram two represents an element of helium, while the diagram three represents an element of oxygen.
Therefore, the diagram first represents an atom from period three of the modern periodic table.
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Please help me out! This is a big question!
True or false?
Because of the Doppler effect, as an observer and source move closer the pitch of the sound from the source gets higher; if the observer and source are moving farther apart the pitch will sound lower to the observer.
Answer:
true
Explanation:
I just had a test on this
Answer:
true
Explanation:
cause it is
What is the net force on the book in the Figure below? If the book moves, in
which direction will it move (Left or Right)? PLEASE ANSWER BOTH PARTS
OF THIS QUESTION.
Explanation:
One force acting on you—and all the other objects on ... Look at the physics book in the Figure below. ... case, the object will move in the same direction as the net force .
Answer:
2N to the left
Explanation:
A man has been guarding a house for one hour . Why is it not considered work in science
Answer: because there is no displacement or movement in the watchman's work. According to science when displacement or movement take place it is said to be work. Jul 9, 2020
Hope it helps!
Brady has extreme persistent worry and fear that impacts his daily life. How would this disorder be classified in the DSM-5? (2 points) Group of answer choices Anxiety Disorder Substance Use and Addictive Disorder Obsessive-Compulsive and Related Disorder Feeding and Eating Disorder
Answer:
Anxiety
Explanation:
Answer:
anxiety disorder
Explanation:
just took the quiz
Need help ASAP !
This is due today and I’m confused on this question
Answer: 5.4 kg
Explanation:"Recall that force is the result when we multiply the values of an object's mass and acceleration. Mathematically, we have
F = ma
where F is the force (in Newtons, N), m is the mass (in kilograms, kg), and a is the acceleration (in m/s²).
Since we know that the eagle was accelerating at 22.35 m/s² with a force of 120N, we can solve for the eagle's mass as shown below.
m = F/a
m = (120)/(22.35) ≈ 5.4 kg
Hence, the eagle has a mass of approximately 5.4 kg."
Frank has a liquid. It has a mass of 6 g and a volume of 9 ml. What is its density?
Psychological disorders carry a stigma for some people. This means that: A.they have irrational shame because of it. B.they believe they have done everything right. C.they believe they are possessed. D.they don't know how to get medication for it.
Answer: A. they have irrational shame because of it
Explanation:
PLEASE HELP ME ANSWER DUE SOON BRAINLIEST FOR WHOEVER
Answer:
1) mechanical
2) transverse
3) medium
4) longitudinal
Explanation: