Answer:
The correct option is (B)
Explanation:
The square of wave function or probability density shows the probability of finding the particle at a given position and time. It can be given as :
[tex]P(x)\ dx=\psi *(x,t)\psi (x,t)\ dx[/tex]
By finding the square of wave function, we can find the location of the particle statistically. Hence, the correct option is (B) "The square of the wave function represents the probability of finding the particle at a given position and time".
The square of wave function represents the probability of finding electron at a given position and at a given time. Hence, the correct option is (B).
The given problem is based on the concept of wave function. The wave function is a parameter of quantum mechanics that determines the physical state of particles.
The wave function of a particle is probability amplitude, and its modulus square gives the probability density of finding the electron in a certain position in spaceThe square of wave function or probability density shows the probability of finding the particle at a given position and time. It can be given as :[tex]P(x)dx=\phi\times (x,t) \phi(x,t) dx[/tex]
By finding the square of wave function, we can find the location of the particle statistically.
Thus we can conclude that the square of wave function represents the probability of finding electron at a given position and at a given time. Hence, the correct option is (B).
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A 30-microfarad capacitor is charged to 90 v and then connected across an initially un charged capacitor of unknown capacitanc c .if the final potintial difference across the 30- microfarad capacitor is 20 v sitemin c
Answer:
The value is [tex] C_u = 5 *10^{-6} F[/tex]
Explanation:
From the question we are told that
The voltage of the capacitor is [tex]V = 90 \ V[/tex]
The capacitance of the capacitor is [tex]C = 30 \ \mu F = 30 *10^{-6} \ F[/tex]
The final voltage is [tex]V_a = 20 \ V[/tex]
Since the capacitors are connected in parallel we have that
[tex]Q_u = Q'_u + Q[/tex]
Where [tex]Q_u[/tex] is the charge of the known capacitor before it is connected to the known capacitor
[tex]Q_u' [/tex] is the charge of the known capacitor after it is connected
[tex]Q [/tex] is the charge of the unknown capacitor
Also the potential across the two capacitors will be the same (except for a loss due heat (it been converted to heat ))
So
[tex]CV = CV_a + C_u * V_a[/tex]
=> [tex] C_u * V_a = CV - CV_a [/tex]
=> [tex] C_u = \frac{CV - CV_a }{ V_a } [/tex]
=> [tex] C_u = \frac{ [30*10^{-6} *90] - [30*10^{-6} * 20] }{ 20 } [/tex]
=> [tex] C_u = 5 *10^{-6} F[/tex]
A soda has mass of 1500 g and a density of 2.9 g/ml . What is the volume?
The density of the substance is its mass divided by volume. Thus, the volume of 1500 g soda with a density of 2.9 g/ml is 517.2 g/ml.
What is density?Density of a substance is the measure of its mass per unit volume. The density of a substance depends on its bond type, temperature and pressure as well.
The volume of a substance is the space occupied by its particles. The volume of the substance is the mass divided by density.
Volume is generally expressed in units of liters or milliliters.
Given that, mass of soda = 1500 g
density = 2.9 g/ml
volume = mass/ density
v = 1500 g/ 2.9 g/ml = 517.2 ml.
Therefore, the volume of soda is 517.2 ml.
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wire 1 and 2 are made of the same metal. wire 2 has twice the length and diameter of the of wire 1.what is the ratio R2/R1 of the resistance of two wire ?
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
That's a good, simple description of a "hypothesis".
Another way to describe it is "an educated guess".
Once you have it in words, it's time to start checking it out, with experiments that can show whether it's true or not.
If your experiments seem to show that your hypothesis seems to be true, that doesn't 'prove' it, but you can start calling your hypothesis a "theory".
(It's possible that you may never be able to 'prove' it. It may remain a theory forever. Like gravity, germs, atoms, and relativity. Thousands of successful experiments don't 'prove' a theory, but it can be trashed by one good, valid experiment to show that it's false.)
g Two tiny identical spheres of mass m = 66.7 g carry identical positive charge q. The charges hang from identical massless threads of length L = 84.8 cm attached to a ceiling at the same point. The spheres repel, and the angle between the threads is θ = 33o. Find q, the charge on each sphere, in μC.
Answer:
Explanation:
a
The angle each thread is making with the vertex = 16.5 degree
weight acting downwards = 66.7 x 10⁻³ x 9.8 N .
distance between two charges = 2 x 84.8 x 10⁻² sin 33/2
= .48 m
repulsive force between the two charges
= 9 x 10⁹ x q² / .48²
F = 39 x 10⁹ q²
Now, the tension in the thread be T
T cos 16.5 = mg
T sin 16.5 = F
dividing
tan 16.5 = F / mg = 39 x 10⁹ x q² / 66.7 x 10⁻³ x 9.8
.296 x 66.7 x 10⁻³ x 9.8 = 39 x 10⁹ x q²
q² = 4.96 x 10⁻¹²
q = 2.23 x 10⁻⁶ C
= 2.23 μC
A piece of wood that floats on water has a mass of 0.0175 kg. A lead weight is tied to the wood, and the apparent mass with the wood in air and the lead weight submerged in water is 0.0765 kg. The apparent mass with the wood and the lead weight both submerged in water is 0.0452 kg. What is the specific gravity of the wood
Answer:
Specific gravity is 0.56
Explanation:
We know that
mass of water displaced by the wood is, m1( apparent mass when wood in air and lead is submerged in water) - m2(the apparent mass when wood and lead both are submerged in water)
= 0.0765 - 0.0452 = 0.0313 Kg
So the specific gravity of the wood is, = mass of wood / mass of water displaced by the wood
= 0.0175/0.0313
=0.56
Impulse is the______of the force and time of contact
Answer:
Product
Explanation:
Impulse is defined as the average force acting on an object times the time the force acts:
Impulse = F · Δt
Which statement is TRUE?
A) Energy can be created or destroyed.
B) Electrical energy is created from other forms of energy.
C) Energy in a battery makes new energy called electrical energy.
D) Stored energy in a battery can be transformed into electrical energy.
The 45-g Wood Thrush migrates every spring from Central America to the United States to breed. The bird leaves its winter
home in Belize and travels 1422 km across the Gulf of Mexico to Louisiana. It then flies an additional 1343 km to reach
Virginia, where it spends the summer. The trip takes approximately 171 hours, flying mostly at night.
What is the average speed of the Wood Thrush?
Answer:
v = 16.16 km/h
Explanation:
Distance covered by Wood Thrush is 1422 km across the Gulf of Mexico to Louisiana + 1343 km to reach Virginia, where it spends the summer.
d = 1422 km + 1343 km
d = 2765 km
The trip takes approximately 171 hours, flying mostly at night, t = 171 hours
We need to find the average speed of the Wood Thrush. It can be given by :
[tex]v=\dfrac{d}{t}\\\\v=\dfrac{2765\ km}{171\ h}\\\\v=16.16\ km/h[/tex]
So, the average speed of the Wood Thrush is 16.16 km/h.
The driver of a truck has an acceleration of 0.3 g as the truck passes over the top of a hump in the road at a constant speed. The radius of curvature of the road at the top of the road is 98 m, and the center of mass G of the driver, who can be considered a particle, is 2 m above the road. What is the speed of the truck
Answer:
17.115m/s
Explanation:
The formula that will be used to calculate the speed of the truck is expressed as shown:
v = √ar
a is the acceleration of the truck
r is the radius of curvature of the road at the top of the road plus centre of mass G who can be considered a particle, is 2 m
v = √a(R+G)
Given parameters
a = 0.3g (g is the acceleration due to gravity)
R = 98m
G = 2m
Substituting the values into the formula:
v = √0.3(9.81){98+2}
v = √0.3×9.81×100
v = √294.3
v = 17.155m/s
Hence the speed of the truck is 17.155m/s
What is the field outside the capacitor plates in a parallel capacitor?
Answer:
Zero
Explanation:
If using an ideal parallel plate capacitor, the electric field outside should be nearly zero.
A 200g mass is attached to a spring, of spring constant, k. The spring is compressed, 15cm from its equilibrium value. When released, the mass reaches a speed of 5m/s. What is the spring constant (in N/m)?
Answer:
The spring constant is 222.2 N/m
Explanation:
Given;
mass of the spring, m = 200 g = 0.2 kg
extension of the spring, x = 15 cm = 0.15 m
speed of the mass, v = 5 m/s
spring constant, k = ?
Apply law of conservation of energy;
¹/₂kx² = ¹/₂mv²
k = mv² / x²
k = (0.2 x 5²) / (0.15²)
k = 222.2 N/m
Therefore, the spring constant is 222.2 N/m
0.000609 in scientific notation
Answer: hey!
i believe your answer is 6.09 times 10^-4
Explanation:
the exponent is negative 4 have a good day
A tow truck is using a cable to pull the classic car up a 15o hill. If the classic car weighs 4000 lbs and the cable has a diameter of 3/4 inch, find the stress in the cable when the truck comes to a stop while on the hill. Ignore friction between the car and the pavement
Answer:
the stress in the cable at the time when the truck is stop is 2,344.57 lb/m^2
Explanation:
The computation of the stress in the cable when the truck comes to a stop is shown below:
We used the following formula
[tex]T = mg\times sin\theta\\\\= 4,000 \times sin15^{\circ}[/tex]
= 1,035.28
Now the stress in the cable is
Before calculating it first determined the area which is
[tex]Area = \frac{\pi}{4}\times (\frac{3}{4})^2 \\\\= \frac{9\pi}{64}[/tex]
So, the stress is
[tex]= \frac{T}{area}\\\\ = \frac{1,035.28}{\frac{9\pi}{64} }[/tex]
= 2,344.57 lb/m^2
Hence, the stress in the cable at the time when the truck is stop is 2,344.57 lb/m^2
What trend does the reactivity of nonmetals show in a periodic table? random changes without any trends on the periodic table changes according to trends on the periodic table increases from left to right across the periodic table decreases from left to right across the periodic table
Answer:
C) increases from left to right across the periodic table
Explanation:
if you're reading this, you better smile cause you aren't the only one stressed out about school :))) have a great day love
The trend of the reactivity of non metals in the periodic table is that it increases from left to right across the periodic table.
The periodic table is composed of metals on the left hand side and nonmetals on the right hand side.
As such, nonmetallic property increases from left to right across a period and so does the reactivity of nonmetals.
This implies that as we move from left to right across a period, nonmetallic elements become more reactive.
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Which statement describes a characteristic of an experimental design that
will improve the quality of the results?
Answer:
A.
Ok, suppose an experiment where you have a lot of dependent variables.
something like the variables y, z and k that change when you change the variable x.
Now, as you play with the variable x, you will notice changes in the variables z, y and k.
But there is now a question (a lot actually)
if the change in k was actually caused by the change in z?
Then you need to try to find a way of changing the value of z for a fixed value of x (designing an experiment) and see how k reacts.
This may be really hard, so as few responding variables you have, the simpler is the experiment, and easier will be to collect good data.
Now we also could discard the other options:
B: If the procedure is complex, then there are more ways in which the scientist can make a mistake that will introduce error to the data, so this will not improve the quality.
C: A larger sample will allow you to have more precision, as more subjects are being observed.
D: When we manipulate one variable, we may be actually introducing some quantity of error to the data.
For example, if the quantity is the voltage for an experiment, we actually do not know the exact voltage tath comes from the source, so there is a small source of error. Now as we start adding more and more independent variables, we also are adding more of these sources of errors, so an experiment with several independent variables will not improve the quality of the results.
A massive block is being pulled along a horizontal frictionless surface by a constant horizontal force. The block must be __________. View Available Hint(s) A massive block is being pulled along a horizontal frictionless surface by a constant horizontal force. The block must be __________. continuously changing direction moving at constant velocity moving with a constant nonzero acceleration moving with continuously increasing acceleration
Answer:
The body must be moving with a constant non zero acceleration.
Explanation:
Force produces acceleration on any mass it is applied on. The acceleration produced depends on the magnitude and direction of the force. For this block being dragged by a constant horizontal force, The body will undergo a constant non-zero acceleration that will steadily increase its velocity along the direction of the force.
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of 9q. Sphere B carries a charge of -q. Sphere C carries no net charge. Spheres A and B are touched together and then separated. Sphere C is then touched to sphere A and separated from it. Lastly, sphere C is touched to sphere B and separated from it. (a) What is the ratio of the final charge on sphere C to q
Answer:
Explanation:
A and B are touched .
charge on each of them after touching = (9q - q) / 2 = 4q
when C is touched with A
charge on A and C each after touching
= 4q + 0 / 2 = 2q
When C is touched with B
charge on each of them
(2q + 4q ) / 2 = 3 q
Final charge on C = 3q
Answer:
✔ A and D
✔ B
✔ C
Explanation: because i said so
An object of mass kg is released from rest m above the ground and allowed to fall under the influence of gravity. Assuming the force due to air resistance is proportional to the velocity of the object with proportionality constant b N-sec/m, determine the equation of motion of the object. When will the object strike the ground? Assume that the acceleration due to gravity is and let x(t) represent the distance the object has fallen in t second
Answer:
Explanation:
From, the given information: we are not given any value for the mass, the proportionality constant and the distance
Assuming that:
the mass = 5 kg and the proportionality constant = 50 kg
the distance of the mass above the ground x(t) = 1000 m
Let's recall that:
[tex]v(t) = \dfrac{mg}{b}+ (v_o - \dfrac{mg}{b})^e^{-bt/m}[/tex]
Similarly, The equation of mption:
[tex]x(t) = \dfrac{mg}{b}t+\dfrac{m}{b} (v_o - \dfrac{mg}{b}) (1-e^{-bt/m})[/tex]
replacing our assumed values:
where [tex]v_=0 \ and \ g= 9.81[/tex]
[tex]x(t) = \dfrac{5 \times 9.81}{50}t+\dfrac{5}{50} (0 - \dfrac{(5)(9.81)}{50}) (1-e^{-(50)t/5})[/tex]
[tex]x(t) = 0.981t+0.1 (0 - 0.981) (1-e^{-(10)t}) \ m[/tex]
[tex]\mathbf{x(t) = 0.981t-0.981(1-e^{-(10)t}) \ m}[/tex]
So, when the object hits the ground when x(t) = 1000
Then from above derived equation:
[tex]\mathbf{x(t) = 0.981t-0.981(1-e^{-(10)t}) \ m}[/tex]
[tex]1000= 0.981t-0.981(1-e^{-(10)t}) \ m[/tex]
By diregarding [tex]e^{-(10)t} \ m[/tex]
[tex]1000= 0.981t-0.981[/tex]
1000 + 0.981 = 0.981 t
1000.981 = 0.981 t
t = 1000.981/0.981
t = 1020.36 sec
Calculate the potential difference of a wire of 10 ohm , through which 5 A of current is flowing .
2 V
50 V
0.2 V
0.5 V
During a relay race, runner A runs a certain distance due north and then hands off the baton to runner B, who runs for the same distance in a direction south of east. The two displacement vectors A and B can be added together to give a resultant vector R. Which drawing correctly shows the resultant vector?
Answer:
d) 4
Explanation:
The image attached shows the options.
The resultant vector is the resultant of two or more vectors. The resultant vector is gotten by adding the sum of the displacement of the vectors together (that is the sum of all the individual vectors).
From the question, since runner A runs north and runner B runs east the resultant vector would be the sum of the displacement of vectors A and B. Also, the direction of the vector would be the north east starting from the beginning of vector A to end of vector B. The correct option is d) 4
difference between boiling point and freezing point
A car is traveling 16 m/s East. If the car then speeds up at a constant acceleration, what is the direction of the car’s acceleration?
7.9x10^9 km is equal to?
Explanation:
7.9x10^9 km is equal to
=7900000000km
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4800 g to kg? With the work pls
Answer:
[See Below]
Explanation:
✦ Formula = [tex]Mass / 1000[/tex]
✧ [tex]4800 / 1000 = 4.8[/tex]
So [tex]4800[/tex] grams is equal to [tex]4.8[/tex] kilograms.
~Hope this helps Mate. If you need anything feel free to message me.
Mass of mercury = 57 g Volume of mercury = 4.2 mL
What is the definition of Acceleration? In science?
Answer:
The definition of acceleration is is a vector quantity that is defined as the rate at which an object changes its velocity.
Explanation:
Answer:
DescriptionIn mechanics, acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities. The orientation of an object's acceleration is given by the orientation of the net force acting on that object.
Explanation:
How much work is done on a small car of a 1000 N force is exerted to move it 75 m to the side of the road?
Answer:
7500j
Explanation:
Work :
W = Fd (work = force x distance)
Force :
F = W/d
Distance :
d = W/F
11.50 kg object has the given and acceleration components. =(0.35ms2)+(0.73ms3) =(11.5ms2)−(0.75ms3)
Felipe walks from the house to his truck on the way to work. He walks 20m to the truck and another 60m in his truck for a total of 20s. What is Felipes average velocity over the 20s period? What is Felipes average speed over the 20s period?
Answer:
Felipe's average speed over the 20s period is 14.4 km/h.
Explanation:
To determine the speed at which Felipe has walked, the distance traveled and the time it took him must be considered.
Thus, Felipe walked 80 meters (20 towards the truck, and 60 inside it) in a total of 20 seconds. That is, he traveled 4 meters per second (80/20 = 4).
Now, to transfer said speed to kilometers per hour, the following calculation must be performed:
1 hour = 60 minutes
1 = 60 seconds
Number of seconds in an hour: 60 x 60 = 3600
Thus, Felipe has walked at an average speed of 14,400 meters per hour (4 x 3,600 = 14,400). So, since a kilometer consists of 1000 meters, its average speed in kilometers per hour was 14.4 km / h (14,440 / 1,000 = 14.4).
Answer: the answer is 4.0 for both
Explanation: on khan academy !!!
