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What happens when the mantle melts?
Answers
It produces oceanic crust,
Partial melting is an important process in geology with respect to the chemical differentiation of crustal rocks. On the Earth, partial melting of the mantle at mid-ocean ridges produces oceanic crust, and partial melting of the mantle and oceanic crust at subduction zones creates continental crust.
Related Questions
You do 25 J of work while using a hammer. The hammer does 18 J of work on the nail. What is the efficiency of the hammer?
physical science
help please
Answers
Formula: η = Eout / Ein * 100%
Answer:
The efficiency of the hammer is 72%.
Explanation:
output work/input work x 100%
18J/25J x 100%
0.72 x 100%
72%
We drive a distance of 1 kilometer at 20 km/h. then we drive an additional distance of 1 kilometer at 30 km/h. what is our average speed (in km/h)?
Answers
1 km * 1hr/30 km = 0.033 hr
2km total
(0.05 + 0.0333) = 0.08333 hr
2km/0.08333 hr = 24 km/hr
The driver drives at a speed of 20km/hr, then the average speed is 24km/hr.
According to the question, they traveled one kilometer at a speed of 20 kilometers per hour. The equation time = distance/speed can be used to determine how long it will take to travel this distance. Thus, the duration of the initial leg of the journey is 1/20, or 0.05 hours.
then proceeded to travel at a speed of 30 km/h for an additional distance of 1 km. Similar to the previous section, this one's travel time is 1/30, or 0.0333 hours.
Now, add the travel times for both legs to get the overall time: 0.05 + 0.0333 = 0.0833 hours.
Now, adding the distances covered in each leg of the journey to get the total distance traveled: 1 + 1 = 2 kilometers.
By dividing the total distance by the total time, we can finally determine the average speed: average speed = total distance/total time = 2/0.0833 24 km/h.
As a result, they travel at a speed of roughly 24 km/h.
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Which object will have greater acceleration? Why?
Answers
Answer:
Object D
Explanation:
Use Newton's Second Law to determine the acceleration that each object has.
F = maThe force applied in both cases is 50 N, but the mass for object C and object D is different.
Let's start with object C first:
F = ma 50 N = 10 kg · a 50 = 10a 5 = aThe acceleration object C undergoes is 5 m/s².
Now let's calculate object D next:
F = ma 50 N = 2 kg * a 50 = 2a25 = aThe acceleration object D undergoes is 25 m/s².
Object D has greater acceleration because it has a smaller mass. The object with a smaller mass will accelerate more in order to satisfy Newton's 2nd Law.
The Fourth Amendment to the United States Constitution forbids what type of searches and seizures? Group of answer choices illegal unsupervised unreasonable undercover
Answers
The Fourth Amendment to the United States Constitution forbids unreasonable searches and seizures.
The Fourth Amendment protects individuals from unreasonable searches and seizures conducted by the government. It establishes that people have the right to be secure in their persons, houses, papers, and effects, and prohibits the government from conducting searches or seizures without a valid warrant based on probable cause.
The amendment requires that searches and seizures be conducted with a warrant, supported by probable cause, or under certain exceptions recognized by the courts, such as consent, exigent circumstances, or search incident to arrest. It aims to safeguard individuals' privacy and protect them from arbitrary governmental intrusion into their personal lives.
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"For a first order instrument with a sensitivity of .4 mV/K and a time" constant of 25 ms, find the instrument’s response as a function of time for a sudden temperature increase from 273 K to 473 K. Before the temperature increase, the instrument output was a steady 109.2 mV. Plot the response y(t) as a function of time. What are the units for y(t)? Find the 90% rise time for y(t90) and the error fraction, Γ(t90).
Answers
Answer:
Explanation:
Given that:
For a first order instrument with a sensitivity of .4 mV/K
constant c = 25 ms = 25 × 10⁻³ s
The initial temperature \(T_1\) = 273 K
The final temperature \(T_2\) = 473 K
The initial volume = 0.4 mV/K × 273 K = 109.2 V
The final volume = 0.4 mV/K × 473 K = 189.2 V
the instrument’s response as a function of time for a sudden temperature increase can be computed as follows:
Let consider y to be the function of time i.e y(t).
So;
y(t) = 109.2 + (189.2 - 109.2)( 1 - \(\mathbf{e^{-t/c}}\))mV
y(t) = (109.2 + 80 ( 1 - \(\mathbf{e^{t/25\times 10^{-3}}}\))) mV
Plot the response y(t) as a function of time.
The plot of y(t) as a function of time can be seen in the diagram attached below.
What are the units for y(t)?
The unit for y(t) is mV.
Find the 90% rise time for y(t90) and the error fraction,
The 90% rise time for y(t90) is as follows:
Initially 90% of 189.2 mV = 0.9 × 189.2 mV
= 170.28 mV
170.28 mV = (109.2 + 80 ( 1 - \(\mathbf{e^{t/25\times 10^{-3}}}\))) mV
170.28 mV - 109.2 mV = 80 ( 1 - \(\mathbf{e^{t/25\times 10^{-3}}}\))) mV
61.08 mV = 80 ( 1 - \(\mathbf{e^{t/25\times 10^{-3}}}\))) mV
0.7635 mV = ( 1 - \(\mathbf{e^{t/25\times 10^{-3}}}\))) mV
t = 1.44 × 25 × 10⁻³ s
t = 0.036 s
t = 36 ms
The error fraction = \(\dfrac{189.2-170.28 }{189.2}\)
The error fraction = 0.1
The error fraction = 10%
The equation below is used to calculate the mechanical advantage of an ideal wheel and axle.
mechanical advantage =
wheel radius
__________
axle radius
A student compares two wheel-and-axle simple machines. Machine 1 has a wheel radius of 50 centimeters, and an axle radius of 10 centimeters. Machine 2 has a wheel radius of 100 centimeters, and an axle radius of 10 centimeters. What is true of these simple machines’ mechanical advantage?
A.
Machine 1’s mechanical advantage is greater, which means that this machine can do more work with less force than Machine 2.
B.
Machine 1’s mechanical advantage is greater, which means that this machine can move faster than Machine 2.
C.
Machine 2’s mechanical advantage is greater, which means that this machine can do more work with less force than Machine 1.
D.
Machine 2’s mechanical advantage is greater, which means that this machine can move faster than Machine 1.
Answers
Answer:
b
Explanation:
Machine 2’s mechanical advantage is greater, which means that this machine can do more work with less force than Machine 1.
Mechanical advantageThe term mechanical advantage is the ratio of the radius of wheel to the radius of the axle for a wheel and axle system.
The true statement about the two machines that were compared; 1 and 2 is that, machine 2’s mechanical advantage is greater, which means that this machine can do more work with less force than Machine 1.
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_____ are tiny organisms that are made of a single cell
Answers
What are one or two things that you know about collisions?
Answers
Answer: In science collisions can be elastic, meaning they conserve both momentum and kinetic energy, or inelastic, meaning they conserve momentum but not kinetic energy.
Explanation: I hope that helped yall!
It takes 5 J of work to compress a monatomic ideal gas in a well-insulated container initially at atmospheric pressure and room temperature (300K) from 16 cc to 3 cc. What is the final pressure of the gas in atm?
Answers
We can solve this problem by using the First Law of Thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system:
ΔU = Q - W
Since the container is well-insulated, Q = 0 and therefore ΔU = -W. The change in internal energy is given by:
ΔU = (3/2)nRΔT
where n is the number of moles of gas, R is the gas constant, and ΔT is the change in temperature. Since the gas is monatomic, we can substitute n = N/NA, where N is the number of atoms and NA is Avogadro's number, and use R = kNA, where k is the Boltzmann constant. Then we have:
ΔU = (3/2)(N/NA)kΔT
The work done by the gas is given by:
W = PextΔV
where Pext is the external pressure and ΔV is the change in volume. Since the pressure is constant, we can substitute Pext = Patm, the atmospheric pressure. Then we have:
W = Patm(V2 - V1)
where V1 and V2 are the initial and final volumes, respectively. Substituting the given values, we have:
W = 5 J
V1 = 16 cc = 16×10^-6 m^3
V2 = 3 cc = 3×10^-6 m^3
ΔV = V2 - V1 = -13×10^-6 m^3 (negative because the gas is compressed)
Substituting into the work equation, we get:
5 J = (101325 Pa)(-13×10^-6 m^3)
P = -5/(101325×13×10^-6) atm
P ≈ 0.003 atm
This result is negative, which means that the gas has done work on the surroundings rather than the other way around. This is because we have compressed the gas by doing work on it, and the gas has then expanded against the walls of the container, doing work on the surroundings. To get the final pressure of the gas, we need to add the atmospheric pressure to the pressure change caused by the compression:
Pf = Patm - ΔP = Patm - W/V2 = 1 - 5/(3×10^6) atm
Pf ≈ 0.9983 atm
Therefore, the final pressure of the gas is 0.9983 atm.
In materials such as metals, the outer shell electrons are loosely bound to the nuclei of their atoms and are free to move from one atom to another. These materials are good conductors. Is this true or false?
Answers
In materials such as metals the outer most electrons are loosely bound and therefore their movement is chaotic, this allows for the transportation of energy in form of electricity therefore, this materials are good conductors. The statement is true.
A circuit contains a single 240-pF capacitor hooked across a battery. It is desired to store four times as much energy in a combination of two capacitors by adding a single capacitor to this one. What would its value be?
Answers
To store four times as much energy in a combination of two capacitors by adding a single capacitor to this one. Thus, the capacitance of the added capacitor should be: 3(240 pF) = 720 pF.
To begin with, the energy stored by a capacitor in an electrical circuit is given by the equation:
E = 1/2CV^2...
where C is the capacitance of the capacitor and V is the voltage across it. The energy stored in the circuit is equal to the energy stored in the capacitor,
so the formula can be rewritten as follows:
E = 1/2C(∆V)^2...
where ∆V is the voltage across the capacitor.
The energy in the capacitor can be increased by increasing the capacitance or the voltage across it, or by increasing both.
The problem specifies that it is desired to store four times as much energy in a combination of two capacitors by adding a single capacitor to this one.
So, the energy stored in two capacitors can be expressed as:
E1 + E2 = 4E...
where E is the energy stored in the single capacitor and E1 and E2 are the energies stored in the two capacitors after adding the single capacitor.
Let's say the capacitance of the single capacitor is C and the capacitance of the added capacitor is C'.
Then, the total capacitance of the two capacitors can be expressed as:
C total = C + C'...
and the energy stored in each capacitor can be expressed as:
E = 1/2C(∆V)^2 and
E' = 1/2C'(∆V')^2...
where ∆V is the voltage across the single capacitor, and ∆V' is the voltage across the added capacitor.
The voltage across each capacitor is the same,
so ∆V = ∆V'.
Substituting these equations into the first equation,
we get:
1/2C(∆V)^2 + 1/2C'(∆V)^2 = 4[1/2C(∆V)^2].
which can be simplified to: C' = 3C...
Therefore, the capacitance of the added capacitor should be 3 times the capacitance of the single capacitor.
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1.
A kitten is sleeping in her bed with a force of gravity of 20N
What is the mass of the kitten?
Answers
Imagine that a coffee filter is falling through the air after being released from a specific height. The filter accelerates for a time and rotates a bit so that the bottom of the filter is facing down, but then reaches a terminal velocity. Now, it is continuing to fall at a constant speed without tipping or rotating. At this moment, is the coffee cup in equilibrium?
Answers
The moment when the coffee filter fall from the upward, it is in the equilibrium.
A coffee filter is falling through the air after being released from a specific height. The filter accelerates for a time and rotates a bit so that the bottom of the filter is facing down, but then reaches a terminal velocity. Now, it is continuing to fall at a constant speed without tipping or rotating. When it is falling from the height, the gravitational force acting on it and the air resistance acting on it balances out each other. Then there is no net force on the coffee filter that is acting on it either ways. When the filter is going downwards many are the forces they are working on it, but when it is going down all the forces acting on it got cancel out and only the net forces acting on majorly cancel each other effect and it nullifies them and their effect and we got a net zero force on it. Hence, we can conclude that at the moment, when the coffee filter is falling from the height the forces are balance out and there is no net force and the coffee cup is in equilibrium.
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hii please help i’ll give brainliest!!
Answers
Please help mee
1. A body weighing 2 kg moves in a straight line with a speed of 72 km / h. If the force 10N will act on the body, after how long will its speed become 30m / s?
Answers
Answer:
It's an uniformly accelerated motionVf=at +v0v0=72 km/h:3.6=20 m/s
a=F/m=10/2=5m/s^2
t=(vf-v0)/a
t= (30-20)/5=10/5=2s
A particle, of mass 6 kg, is in equilibrium on a rough horizontal plane under a force o-f magnitude T N, which acts at an angle 15° above the horizontal. Given the coefficient of friction between the particle and the rough horizontal plane is 0.35, what values could T take?
Answers
Answer:
T is less than or equal to 19 N
Explanation:
A patient has an ongoing history of cancer. She has a tumor in the abdominal region, and has been undergoing treatment for it. There may be other tumors and a potential blockage in the surrounding area that need to be investigated. The imaging technique that might provide the most information in this case is . Joe has ongoing issues with his throat and feels some sort of blockage or abnormality as he swallows. The doctor decides to use X-ray imaging to visualize Joe’s internal anatomy as he swallows to help determine the nature of the problem. will be used for this procedure.
answer: 1. a CT scan
2. Fluoroscopy
Answers
Answer:
the answer is at the BOTTOM OF THEIR QUESTION
Explanation:
IT IS CORRECT BTW
A car travels 18 km / h to the northwest. What is the speed of this car seen from another car going south at 60 km / h?
Answers
Answer:
73.8 km/h
Explanation:
The velocity of object A relative to object B is:
v = va − vb
Let's say east is +x and north is +y, and angles are measured from +x.
The velocity of the first car in the x direction is:
18 km/h cos 135° = -9√2 km/h
The velocity of the first car in the y direction is:
18 km/h sin 135° = 9√2 km/h
The velocity of the second car in the x direction is:
60 km/h cos 270° = 0 km/h
The velocity of the second car in the y direction is:
60 km/h sin 270° = -60 km/h
The relative velocity in the x direction is:
vₓ = -9√2 km/h − 0 km/h = -9√2 km/h ≈ -12.7 km/h
The relative velocity in the y direction is:
vᵧ = 9√2 km/h − (-60 km/h) = 9√2+60 km/h ≈ 72.7 km/h
The speed, or magnitude of the velocity, is:
v = √(vₓ² + vᵧ²)
v = √((-12.7 km/h)² + (72.7 km/h)²)
v ≈ 73.8 km/h
SOMEONE HELP
Perform the following conversion.
0.09 km to dam
Answers
Answer:9
Explanation:
Your physics teacher is giving you a special gift a box of mass 20 kg with a mystery surpise insie .the box is placed on a frictionsed table .what is the weigth of the box and normal reaction over it by the table ?
Answers
Answer:
F = 196.2 N
Explanation:
Use Newtons law
F = m * a
F = 20 kg * 9.81 m/s²
F = 196.2 N
Answer:
\(\Huge \boxed{\mathrm{196.2 \ N}}\)
\(\rule[225]{225}{2}\)
Explanation:
Using weight formula:
\(\sf Weight = mass \times acceleration \ of \ gravity\)
\(W=mg\)
The mass of the box is 20 kg.
The acceleration of gravity on Earth is 9.81 m/s².
\(W=(20)(9.81)\)
\(W=196.2\)
The weight of the box is 196.2 N.
The net force of the box is zero, since the box is at rest. The normal force is exerted upward on it by the table.
\(\rule[225]{225}{2}\)
You normally watch about 4 hours of television every day with 58.6 watts when in on mode and 1.3 watts in standby mode. Which of the two wattages consumes more energy in a whole month?
Answers
In a whole month, the standby mode consumes more energy than the "on" mode for your television.
To determine which of the two wattages consumes more energy in a whole month, we need to calculate the energy consumption for each mode and compare the results.
First, let's calculate the energy consumption for the "on" mode:
Power consumption in watts: 58.6 watts
Time in hours: 4 hours per day
Number of days in a month: Assuming 30 days
Energy consumption in kilowatt-hours (kWh) for "on" mode = (Power consumption in watts * Time in hours * Number of days) / (1000 * 1000)
Energy consumption = (58.6 * 4 * 30) / (1000 * 1000)
= 0.07032 kWh
Next, let's calculate the energy consumption for the standby mode:
Power consumption in watts: 1.3 watts
Time in hours: 24 hours per day (assuming the TV is in standby mode when not in use)
Number of days in a month: Assuming 30 days
Energy consumption in kilowatt-hours (kWh) for standby mode = (Power consumption in watts * Time in hours * Number of days) / (1000 * 1000)
Energy consumption = (1.3 * 24 * 30) / (1000 * 1000)
= 0.0936 kWh
Comparing the two energy consumptions, we find that the energy consumption in the standby mode is higher, with an energy consumption of 0.0936 kWh compared to 0.07032 kWh in the "on" mode.
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How do interaction forces act on different masses and on different objects?
Dosen't make sense
Answers
Explanation:
TRUE - Two colliding objects will exert equal forces upon each other. If the objects have different masses, then these equal forces will produce different accelerations. ... FALSE - In any collision, the colliding objects exert equal and opposite forces upon each other as the result of the collision interaction.
Un ladrillo de 2kg que se encuentra a 200º c, se sumerge en 5 kg de agua a 32º¿a que temperatura se alcanza el equilibrio térmico?
Answers
Answer:
El equilibrio térmico se alcanzará a los 152ºC.
Explanation:
Dado que un ladrillo de 2kg que se encuentra a 200º c, se sumerge en 5 kg de agua a 32º, para determinar a qué temperatura se alcanza el equilibrio térmico se debe realizar el siguiente cálculo:
2+5 = 7
(200 x 5 + 32 x 2) / 7 = X
1064 / 7 = X
152 = X
Por lo tanto, el equilibrio térmico se alcanzará a los 152ºC.
Date: 09/10/2022
What is the equation to finding time using acceleration..
Is it:
T = V - U / A
——————————
Answers
Answer:
yes it's the right answer...............
Question 7.
When can a mouse have the same momentum as an elephant?
د ن ه ه
A. when the mouse has a large velocity and the elephant has a small velocity
when the mouse has a small velocity and the elephant has a large velocity
a mouse cannot have the same momentum as an elephant
D. when they both have the same velocity
Answers
A mouse have the same momentum as an elephant when the mouse has a large velocity and the elephant has a small velocity. The correct option is A.
What is momentum?The momentum is the product of the mass of the object and its velocity.
Mouse has mass very less than the elephant. In order to make their momentum same, the velocity of the mouse must be greater than the elephant.
Mm x Vm = Me x Ve
A mouse have the same momentum as an elephant when the mouse has a large velocity and the elephant has a small velocity.
Thus, the correct option is A.
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A uniform soda can of mass 0.140 kg is 12.0 cm tall and filled with 0.354 kg of soda. Small holes are drilled in the top and bottom (with negligible (no) loss of metal or mass) to drain the soda. What is the height h of the center of mass of the can and contents a) initially and b) after the can loses all of the soda c) what happens to ha as the soda drains out? d) If x is the height of the remaining soda at any given instant, find x when the center of mass reaches its lowest point?
Answers
a) The initial height of the center of mass of the can and soda is 6.0 cm.
b) After the soda is drained out, the height of the center of mass of the can alone is still 6.0 cm.
c) As the soda drains out, the center of mass of the can and remaining soda will rise.
d) The height of the remaining soda when the center of mass reaches its lowest point is 4.77 cm.
a) To find the initial height of the center of mass, we can use the fact that the center of mass of a uniform object is located at the geometric center. Since the can is uniform, the center of mass is at the midpoint of its height, which is 12.0 cm / 2 = 6.0 cm.
b) When all of the soda is drained out, the mass of the can will be 0.140 kg and the height of the can will still be 12.0 cm. Since the can is now empty, the center of mass will be at the midpoint of its height, which is 12.0 cm / 2 = 6.0 cm.
c) As the soda drains out, the center of mass of the can and remaining soda will rise. This is because the soda has a lower density than the can, so the center of mass of the can and soda system is initially lower than the center of mass of the empty can alone. As the soda drains out, the average density of the remaining material increases, causing the center of mass to rise.
d) Let x be the height of the remaining soda at any given instant. The center of mass of the can and remaining soda is given by
h = (m1h1 + m2h2) / (m1 + m2)
where m1 is the mass of the can, m2 is the mass of the remaining soda, h1 is the height of the can (12.0 cm), h2 is the height of the remaining soda (x), and h is the height of the center of mass.
To find the lowest point of the center of mass, we need to find the minimum value of h. Taking the derivative of h with respect to x and setting it to zero, we get
dh/dx = m1 / (m1 + m2) - m2h1 / (m1 + m2)^2 = 0
Solving for x, we get
x = h1 × m1 / m2
Substituting the given values, we get
x = 12.0 cm × 0.140 kg / 0.354 kg = 4.77 cm
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1 * Choose the correct item.
1 The festival is held/is being held/was being held every year in July.
2 The play is/was/has written by Shakespeare in the 16th century.
3 The outdoor performance will cancel/ cancelled/be cancelled if the weather is bad, but the actors usually don't stop for a bit of rain!
4 The panel with the actors from The Defenders was being moved/has been moved/is moved to 7 o'clock.
5 An episode of the TV show was filmed/had been filmed/is being filmed in my village right now!
Answers
Answer:
1. is held
2. was
3. be cancelled
4. has been moved
5. is being filmed
Explanation:
If you read them out, you can find out which ones flow the best! Hope this helps!
How fast Will a brick be going after it falls for 2.5 seconds?
Answers
Answer:
25 m/s
Explanation:
Initial Velocity = 0 m/s
Time = 2.5 m/s
Acceleration due to gravity = 9.8
Final Velocity = ?
By the formula,
\(V_{f} = V_{i} + at\)
\(V_{f}= 0 + 10 x 2.5\)
Vf = 25 m/s
After 2.5 seconds the velocity of ball will be 24.5 m/s.
We have a brick falling from a certain height.
We have to find the velocity of the brick after 2.5 seconds of falling.
What do you mean by Free fall ?The motion of any object under the influence of gravity alone is called as free fall.
According to the question -
Initial velocity = u = 0 m/s
Final velocity = v m/s (say)
g = 9.8 m/\(s^{2}\)
t = 2.5 seconds
Using the first equation of motion -
v = u + at
v = 0 + gt
v = 9.8 x 2.5 = 24.5 m/s
Hence, after 2.5 seconds the velocity of ball will be 24.5 m/s.
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What is the mass of a child in a wagon that has a velocity of 10 m/s and a Momentum of 30 KG* M/S
P=MXV
Answers
Explanation:
sinces : Momentum = velocity × mass
then : 30 = 10 × m and m = 30 ÷ 10 = 3 kg
A rocket sled accelerates forward from 10 m/s to 50 m/s in 2 seconds. What is the acceleration of the sled?
Answers
Answer:
Explanation:
Use kinematics equations
You have Vi=10m/s and Vf=50m/s and t=2s
Use equation Vf=Vo+at 50=10+a(2)
50=10+2a
40=2a
a=20 m/s^2