Answers
Answer:
false this is correct answer of this question
Related Questions
Question 6 of 10
Which statement describes one way that nuclear fusion differs from nuclear
fission?
O A. Nuclear fusion occurs spontaneously on Earth.
B. Nuclear fusion is used to power submarines.
O C. Sustained processes of nuclear fusion occur only in stars.
O D. Nuclear fusion is used in power plants to produce electricity.
Answers
Answer:
did you get the answer??
Sustained processes of nuclear fusion occur only in stars. This statement describes one way that nuclear fusion differs from nuclear fission. Hence option C is correct.
When two lighter nuclei are fused together to form heavier nuclei which is called as fusion reaction. It generally involves hydrogen nuclei, In Fusion process two hydrogen nuclei are fused together and helium nucleus is formed, In this process and enormous amount of energy is released. Fusion reaction occurs only in the star like sun. In sun, hydrogen is a fuel which converts into helium that is why we can see that sun is burning.
It is almost impossible to get fusion reaction on the earth, that is why uranium is used in nuclear power plant. In nuclear power plant uranium is converted into two lighter nuclei which is called as fission.
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A hickory nut is thrown straight down from a 10.m high window and lands on the ground with a velocity of 25.0m/s What was the initial velocity of the nut? How long was it in free fall?
Answers
Given data
*The given height is h = 10.0 m
*The given final velocity of the hickory nut is v = 25 m/s
*The value of the acceleration due to gravity is g = 9.8 m/s^2
The formula for the initial velocity of the nut is given by the equation of motion as
\(v^2=u^2+2gh\)Substitute the known values in the above expression as
\(\begin{gathered} (25)^2=u^2+2\times9.8\times10.0 \\ 625=u^2+196 \\ u^2=625-196 \\ u=20.71\text{ m/s} \end{gathered}\)Hence, the initial velocity of the nut is u = 20.71 m/s
The formula for the time taken by the nut in free fall is given by the equation of motion as
\(v=u+gt\)Substitute the known values in the above expression as
\(\begin{gathered} 25.0=20.71+(9.8)t \\ t=0.43\text{ s} \end{gathered}\)Hence, the time taken by the free fall is t = 0.43 s
What is the difference between memos and emails?
O a. Memos are usually sent online and emails are usually sent on hard copy to inform an action
b. Memos are used for internal messages and emails can be used for external communication
O c. Emails are used for longer reports and memos are used for short reminders and replies
O d. Emails are used for formal reports and proposals and memos are for informal ideas
Answers
D. Emails are used for formal reports and proposals and memos are for informal ideas
What type of wave does not need matter to carry energy?If y varies directly as x and y = 20 when x = 6, what is the value of y when x = 24?
a.
36
b.
80
c.
30
d.
4
Please select the best answer from the choices provided
A
B
C
D
Answers
As for the second question, we can use the direct variation formula:
y = kx
where k is the constant of variation. We can solve for k by plugging in the given values:
20 = k(6)
k = 20/6
Now that we know k, we can use it to solve for y when x = 24:
y = (20/6)(24) = 80
Therefore, the value of y when x = 24 is 80, which is option B.
1. A train is moving north at 5 m/s on a straight track. The engine is causing it to accelerate northward at 2 m/s^2.
How far will it go before it is moving at 20 m/s?
A) 83
B) 43
C) 39
D) 94
E) 20
Answers
Answer:
It will go up to 93.75 m before it is moving at 20 m/s
Explanation:
As we know that
\(v^2 - u^2 = 2aS\)
here v is the final speed i.e 20 m/s
u is the initial speed i.e 5 m/s
a is the acceleration due to gravity i.e 2 m/s^2
Substituting the given values in above equation, we get -
\(20^2 - 5^2 = 2*2*S\\S = 93.75\)meters
The speed of sound is measured to be 340 m/s on a certain day.
What is this in Kilometers per hour?? s/km/h=
Please help and explain how to do these types of problems in very confused!!!
Answers
Explanation:
To do this, we pick the first unit and convert
Picking m first and converting to km:
Since we're converting from a non-prefix to a prefix, we divide the value by the prefix were taking it to. In this case, kilo = 10³ which means we're going to divide our value by 1000 to convert it from m to km
340 m/s ÷ 1000 = 0.34 km/s
Now, let's convert our seconds to hour:
We'll need to calculate how many hours is equivalent to one second first;
1 hr = 60×60 seconds
X hr = 1 second
*Cross multiply*
1 × 1 = X × 60 × 60
1 = 3,600 X
X = 1 / 3,600
X = 2.778×10⁻⁴ hour
So, in the place of "1 Second", we're going to be inserting 2.778×10⁻⁴ hour instead
0.34 km / s = 0.34 km / 2.778×10⁻⁴ hour
(0.34 / 2.778×10⁻⁴) km/hour
1,224 km/h.
340 m/s = 1,224 km/h
Do YOU think aliens are real? HELP PLS
Which answer best displays Adam's use of the civic virtue "diversity"?
Diversity means something is benifical to an entire group.
Diversity means fair treatment of all people the
Answers
Answer:Yes
Explanation:yeah i think it could be possible because the universe is so far and wide its probably infinite and if we did i personally believe that we would be absolutely be annihilated by them because we would be so far behind technology wise we would have no use for the\
YOU FELL FOR IT FOOL THUNDER CROSS SPLIT ATTACK
If the 100 g mass is replaced by a 200 g mass, which variables in Tnet = la change, and which
remains constant? Justify your answer.
Answers
The moment of inertia (I) will changes and net torque (Tnet) will also change, while the angular acceleration (a) remains constant.
What is the changed variable in the equation?The formula for net torque acting on an object is given as;
T(net) = Ia
where;
a is the angular accelerationI is the moment of inertiaT(net) is the net torqueThe moment of inertia of an object is given as;
I ∝ MR²
where;
M is the massR is the radius of the objectSo mass, M changes, the moment of inertia (I) changes and net torque will also change, while the angular acceleration remains constant.
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Collision practice
Running at 2.0 m/s, Bruce, the 45.0-kg quarterback, collides with Biff, the 90.0 kg tackle, who is traveling at 7.0 m/s in the other direction. Upon collision,
Biff wraps up Biff for the tackle. What is the resultant velocity of the players.
V=————— m/s
Answers
Answer:
\(v_f=4\:\mathrm{m/s\: in\:Biff's\:direction}\)
Explanation:
Using the Law of Conservation of Momentum, we can set up the following equation:
\(m_2v_2-m_1v_1=m_fv_f\), where \(m_1v_1\) is Bruce's momentum and \(m_2v_2\).
Plugging in given values, we get:
\(90\cdot7-45\cdot2=(90+45)v_f, \\v_f=\frac{540}{135}=\fbox{$4\:\mathrm{m/s}$}\).
3. A car with a mass of 1600 kg has a kinetic energy of 125 000 J. How fast is it moving?
Answers
The car is moving at approximately 12.5 meters per second.
The kinetic energy (KE) of an object can be calculated using the formula:
KE = 1/2 * m * \(v^2\)
where
KE = kinetic energy,
m =Mass of the object, and
v = velocity.
In this case, we are given the mass (m) of the car as 1600 kg and the kinetic energy (KE) as 125,000 J. To find the velocity .
Substituting the values , we have:
125,000 J = 1/2 * 1600 kg *\(v^2\)
Now, we can solve for v by rearranging the equation:
\(v^2\) = (2 * 125,000 J) / 1600 kg
\(v^2\) = 156.25 \(m^2/s^2\)
Taking the square root, we find:
v = √156.25\(m^2/s^2\)
v ≈ 12.5 m/s
Therefore, the car is moving at approximately 12.5 meters per second.
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Activity
Many characters portrayed in the media suffer from psychological disorders. For example, piglet from Winnie the Pooh has generalized anxiety
disorder and Elsa from the movie Frozen has agoraphobla. Similarly, Identify at least four characters from movies or television shows and
describe the disorders the characters suffer from in the stories.
Answers
Answer:
Explanation:
Belle from beauty and the beast has what they call Stockholm syndrome.
Spongebob from Spongebob square pants has what is called Williams-Beuren syndrome
Ariel from the Little Mermaid has what they call Disposophobia.
Alice from Alice in the wonderland has what is called schizophrenia
Scar from the Lion King has what is known as anti social personality disorder.
Like the question suggested, many characters suffer different types of disorder, and I've just listed out a few
True or False: Any wavelength of light would work for this experiment. Explain your response, including the term quantum or quantized.
Answers
Answer:
I think false I don't know if I right but I hoped this help
2. A diverging lens has a focal length of 2.5 cm. If it is placed 4.0 cm from an object, at what distance from the lens will the image be located? Is the image bigger or smaller? Is it real or virtual?
Answers
The image distance is 0.65 cm and the image is real but diminished.
What is a diverging lens?We know that for the diverging lens the light appears to be diverged from the source that it come in through. The focal length of the diverging lens is negative and the lens formula is used.
We have;
1/f = 1/u + 1/v
f = focal length
u = object distance
v = image distance
-1/2.5 = 1/4 + 1/v
1/v = 1/4 + 1/2.5
v = 0.25 + 0.4
v = 0.65 cm
The image is real but it is smaller than the object.
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Which direction do longitudinal waves travel?
Answers
Answer:
If the particles of the medium vibrate in a direction parallel to the direction of propagation of the wave, it is called a longitudinal wave. In longitudinal waves, the particle movement is parallel to the direction of wave propagation.
Explanation:
A dry cell is used in a flashlight to convert to light.
a. electrical energy
b. static electricity
Answers
Answer:
Electrical energy this is because when the flashlight us turned on the chemical energy stored in the battery is converted to electrical energy that flows through the wire of the flashlight
A chemist needs 15.0 grams of ethanol for a reaction. If the density of ethanol is 0.789 g/ml, how many milliliters of alcohol should be used?
Answers
\(\\ \bull\tt\dashrightarrow Density=\dfrac{Mass}{Volume}\)
\(\\ \bull\tt\dashrightarrow Volume=\dfrac{Mass}{Density}\)
\(\\ \bull\tt\dashrightarrow Volume=\dfrac{15}{0.789}\)
\(\\ \bull\tt\dashrightarrow Volume=19.01mL\)
onsider laminar flow of a fluid through a square channel with smooth surfaces. now the average velocity of the fluid is doubled. determine the change in the head loss of the fluid. assume the flow regime remains unchanged
Answers
The head loss doubles when the average velocity is doubled.
The velocity formula: why?
The vector quantity velocity (v), denoted by equation v = s/t, quantifies dislocation (or shift in position, s), over change in time (t).
How do velocity and speed differ?Velocity is the pace and direction of the an object's movement, whereas speed is the timekeeping at which an object is travelling along a path.In other words, velocity is a vector, whereas speed is indeed a scalar value.
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Why is the Falcon 9 rocket so important in today's space exploration world?
It's the first rocket to have been built by robots, saving money for labor costs.
Carbon fiber is used on the outside, making it much more lightweight, requiring less fuel to launch it.
It was invented with the ability to recharge itself by using solar panels.
It's a reusable rocket and has saved money by being reused over 60 times already.
Answers
The Falcon 9 rocket is so important in today's space exploration world because It's a reusable rocket and has saved money by being reused over 60 times already.
option D.
Why is the Falcon 9 rocket so important in today's space exploration world?The Falcon 9 rocket, is developed by SpaceX, and it holds a significant importance in today's space exploration world due to several key features and achievements, and some of the importance include the following;
ReusabilityCost-effectivenessAdvancements in rocket technologyPayload capacity and versatilityInnovation and competitionFrom the given options, we can conclude that the Falcon 9 rocket is so important in today's space exploration world because It's a reusable rocket and has saved money by being reused over 60 times already.
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At the instant a traffic light turns green, a car that has been waiting at the intersection starts ahead with a constant acceleration of 2.00 m/s2 . At that moment a truck traveling with a constant velocity of 15.0 m/s overtakes and passes the car. (a) Calculate the time necessary for the car to reach the truck. (b) Calculate the distance beyond the traffic light that the car will pass the truck. (c) Determine the speed of the car when it passes the truck.
Answers
Answer:
Explanation:
(a) The time necessary for the car to reach the truck can be calculated using the equation for average velocity:
v_avg = v0 + at
where v0 is the initial velocity of the car (which is 0 m/s at the instant the light turns green), a is the acceleration of the car (2.00 m/s^2), and t is the time elapsed.
Since the truck is traveling with a constant velocity of 15.0 m/s, we can equate the average velocity of the car to the velocity of the truck:
v0 + at = 15.0 m/s
Solving for t, we get:
t = (15.0 m/s - v0) / a = 15.0 m/s / 2.00 m/s^2 = 7.50 s
(b) The distance beyond the traffic light that the car will pass the truck can be calculated using the equation for displacement:
d = v0t + 1/2at^2
Plugging in the values we found above, we get:
d = (0 m/s)(7.50 s) + 1/2(2.00 m/s^2)(7.50 s)^2 = 56.25 m
(c) The speed of the car when it passes the truck can be calculated using the equation for velocity:
v = v0 + at = 0 m/s + (2.00 m/s^2)(7.50 s) = 15.0 m/s
Nitroball is similar to volleyball with no more than 3 touches per side?
Group of answer choices
True
False
Answers
Answer:
True!
Explanation:
Suppose that in the photoelectric-effect experiment we make a plot of the detected current versus the applied potential difference. What information do we obtain from such a plot? Can we determine from it the value of Planck's constant? Can we determine the work function of the metal?
Answers
The work function of the metal is W₀ = hν₀
The electrons on and near the surface of the metal are expelled when light of continuous intensity and frequency that is greater than the threshold frequency falls on an electrode in a vacuum glass tube. For the sake of simplicity, assume that each photon releases one electron. Now that the light is consistent in intensity, the quantity of photons released and those that collide with the surface will likewise be constant, leading to a constant quantity of electrons released from the metal surface. But because they are at various speeds, the ejected electrons each have a varied amount of kinetic energy.
Only when light strikes a metal surface at a frequency greater than the threshold frequency of the metal does the photoelectric effect take place.Therefore, from above we can said, that the minimum energy of an electron from the metal surface is known as work function.
W₀ = hν₀
In above equation, h is plank constant its value is 6.626 × 10⁻³⁴J-s and ν₀
is the frequency of incident radiation.
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Help my brain ain’t braining
Answers
The arrows are drawn in the figure which shows gravitational forces on each person on earth.
Gravitational force is force of attraction between two masses. Gravitational force(F) between two bodies is directly proportion to the product of masses(m₁,m₂) of two bodies and inversely proportional to square of distance(r) between them. mathematically it is written as,
F∝ m₁.m₂
F ∝ 1/r²
F = G m₁,m₂÷r²
where G is gravitational constant, whose value is 6.6743 × 10⁻¹¹ m³ kg-1s⁻².
Force is expressed in Newton N in SI unit. its dimensions are [M¹L¹T⁻²].
This is analogous with coulomb's law which gives force between two charges.
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19. A pitcher throws a baseball toward a batter at 30m/s. The batter swings his
bat and hits the baseball. The baseball flies away in the opposite direction at a
speed of 35m/s. Is there a transfer of energy in this situation? (SC.7.P.11.4)
a) Yes, because both the bat and the ball are moving after the collision.
b) No, because the ball and the bat only touched for a short time.
c) Yes, because the force from the bat changes the motion of the ball
Answers
A pitcher throws a baseball towards a batter at 30m/s. The batter swings his bat and hits the baseball, then there is a transfer of energy in this situation : c) Yes, because the force from the bat changes the motion of the ball.
How is energy transferred from baseball bat to a baseball?Although baseball may appear hard and solid, it actually behaves much like a rubber ball. In the fraction of a second that ball collides with the swinging bat, ball compresses as the energy of motion goes into deforming the ball and transforms it into an elastic potential energy.
The collision of baseball with bat is elastic and the collision between baseball and glove is nearly inelastic.
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An instrument that produces an electric current in the presence of
a radioactive substance is called a
a. particle accelerator.
b. Geiger counter.
c. cloud chamber.
d. bubble chamber.
Answers
Answer:
Option B, Geiger counter
Explanation:
I will mark brainlist if it’s a good fact.
Can someone give me a fact about space that Is NOT about how space is complete silent or about a black hole cause I already used those. I only need one more fact. And when writing the fact tell me how is that possible. And please don’t copy off the internet cause my teacher would notice. And me to.
Answers
Answer:
o Their are more stars in space than there are grains of sand on earth, and more stars are created every day, we just don't see them yet.
Explanation:
I read a lot. use any of the three facts you like. I just thought that I should let you decide which one :)
Object X is attracted to object Y. If object Y is negatively charged, what can you say about object X? (a) It is positively charged (b) It is negatively charged (c) It is electrically neutral (d) Object X may be positively charged, but it is possible it is also electrically neutral with an induced charge separation
Answers
Answer:
a) Object X is positively charged
Explanation:
Unlike charges attract each other
Like charges repel each other
The object X will be positively charged through charging by conduction.
The given parameters:
Object Y = positively chargeA charge can be produced by conduction. This method of charge generation involves charging a neutral body by placing it in contact charged body.
When object X is placed in contact with object Y, which is negatively charged, the negative charges of object Y repels negative charges of object X. This leaves object X with excess protons, thereby becoming positively charged.
Thus, the object X will be positively charged through charging by conduction.
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Someone please help me asap!!
4. An elevator subject to a downward force of gravity of -2750 is being lifted at a constant speed of 12.5 m/s by a single cable. The force exerted by the lifting cable on the elevator is:
a. 2737.5 in the upwards direction
b. 2750 in the upwards direction
c. 2762.5 in the upwards direction
d. 2750 in the downward direction
Answers
The force exerted by the lifting cable on the elevator is 2750 in the upwards direction. Option B
What is the Newton's law?According to the statement of the Newton's law, action and reaction are equal and opposite. The implication of that is that for every force, there must be an equal and opposite reaction.
We have been told here that . An elevator subject to a downward force of gravity of -2750 is being lifted at a constant speed of 12.5 m/s by a single cable. The mass of the elevator can be obtain from its weight as;
Mass = Weight/ 9.8 m/s^2
Mass = 2750N/9.8 m/s^2
= 280.6 Kg
We can see that the lifting cable also exerts a force on the elevator that is opposite to the force of the gravity in direction. This is how we know that the elevator is going to exert and equal opposite force of 2750 .
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Which of these units is most appropriate to use when measuring the mass of a person?
Answers
The SI unit of mass is the kilogram
What is the effective resistance (in Ω) of a car's starter motor when 147 A flows through it as the car battery applies 11.3 V to the motor?
Answers
Given:
The current flowing through the motor is: I = 147 A
The voltage applied to the motor is: V = 11.3 v
To find:
The effective resistance of the car's motor.
Explanation:
The relation between the voltage V, current I, and the resistance R is given by Ohm's law. The expression for Ohm's law is:
\(V=IR\)Rearranging the above equation, we get:
\(R=\frac{V}{I}\)Substituting the values in the above equation, we get:
\(\begin{gathered} R=\frac{11.3\text{ v}}{147\text{ A}} \\ \\ R=0.0768\text{ }\Omega \\ \\ R\approx0.077\text{ }\Omega \end{gathered}\)Final answer:
The effective resistance of the car's motor is 0.077 Ω.
A platinum resistance thermometer has resistances of 210.0 Ω when placed in a 0°C ice bath and 237.8 Ω when immersed in a crucible containing a melting substance. What is the melting point of this substance? (Hint: First determine the resistance of the platinum resistance thermometer at room temperature, 20.0°C.)
Answers
The resistance of a platinum resistance thermometer is 200 Ω at 0°C and 255.8 Ω at the melting point. Using the resistance-temperature relationship and calculations, the estimated melting point is approximately 19.93°C.
The resistance of a platinum resistance thermometer is 200 Ω when placed in a 0°C ice bath and 255.8 Ω when immersed in a crucible containing a melting substance. To determine the melting point of the substance, we need to calculate the temperature at which the resistance reaches 255.8 Ω.
First, we find the temperature coefficient of resistance (α) using the formula α = (R - R₀) / (R₀ * T), where R is the resistance at the melting point, R₀ is the resistance at 0°C, and T is the temperature at the melting point.
Substituting the given values, we have α = (255.8 - 200) / (200 * T₀), where T₀ is the known room temperature of 20°C.
Calculating α, we find α ≈ 0.014.
Next, we use the resistance-temperature relationship equation R = R₀(1 + αT) to solve for the melting point temperature (T). Substituting the known values, we have 255.8 = 200(1 + 0.014 * T).
Simplifying the equation, we find 1.279 = 1 + 0.014T.
Solving for T, we get T ≈ 19.93°C.
Therefore, based on the given data, the estimated melting point of the substance is approximately 19.93°C.
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