Answers
The light beam shown in the figure below makes an angle of ϕ=28.8∘ ϕ = 28.8 ∘ with the normal line NN' in the linseed oil. Determine the angles θ and θ′ . (The refractive index for linseed oil is 1.48.)
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Related Questions
Find three consecutive even integers such that the sum
of the squares of the lesser two integers is equal to the
square of the greatest,
Answers
Answer:Hi, Sam!
Okay, so let's call the 3 consecutive even integers, X, X + 2 , X +4
So the sum of the smaller two (X +X + 2) = X + 4 +6
2X +2 = X + 10
X = 8
Therefore,
X = 8
X + 2 = 10
X + 4 + 12
These are your integers
Explanation:
If a planet has an orbital eccentricity equal to 0.70, then its orbit is
Closer to a perfect circle then a straight line
Almost rectangular
A very elongated ellipse
Almost parabolic
Answers
If a planet has an orbital eccentricity equal to 0.70, then its orbit is
a very elongated ellipse.What is eccentricity?Eccentricity is a measure of how squashed an ellipse is compared to a perfect circle.
The value of eccentricity ranges from 0 to 1, where 0 represents a perfect circle and 1 represents a parabolic orbit (which is not a closed orbit).
An eccentricity of 0.70 indicates that the planet's orbit is significantly elongated and not close to a perfect circle.
Therefore, the correct answer is - A very elongated ellipse.
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Question 4 Multiple Choice Worth 2 points)
(02.07 MC)
A car increases from 15 km/s to 45 km/s in 5 seconds. Calculate the average acceleration of the car during these 5 seconds
Answers
Explanation:
ACCELERATION IS THE RATE OF CHANGE OF VELOCITY
i.e a = ΔV/ Δt where ΔV is final velocity – initial velocity and Δt is t final – t initial
a = (45–15)/5= 6 km/s²
The average acceleration of the car during these 5 seconds = a = 6 km/s^2
What is average acceleration ?Average acceleration refers to the rate of change of velocity for that interval per time
given
v(initial) = 15 km/s
v( final ) = 45 km/s
time interval = 5 seconds
a (average acceleration) = (v( final ) - v(initial)) / time interval
a = (45 - 15) / 5
a = 6 km/s^2
average acceleration of the car during these 5 seconds = a = 6 km/s^2
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In golf par is the
A. number of golfers who can play a hole at a time
B. typical number of strokes needed to complete a hole .
C. typical number of golfers who pass the course
D. number of holes in a golf course
Answers
Par is a term used in golf to describe the number of strokes a skilled golfer should be able to complete a particular hole or course in. It is determined based on the length and difficulty of the hole or course. A golfer's score for a particular hole is then compared to the par for that hole to determine whether they scored above par (meaning they took more strokes than the expected number), below par (took fewer strokes), or at par (took the expected number of strokes). The overall score for a round of golf is also compared to the total par for the course to determine a golfer's performance.
Answer:
B. typical number of strokes needed to complete a hole.
The valve in the exit pipe is closed . The density of water is 1000kg / m and the gravitational force on free fall of water is 10N / Kg . Calculate the pressure of the water acting on the closed valve in the exit pipe 30m
Answers
Answer:
300000
Explanation:
p=30x10x1000=30000pascal
Answer:
300000
p=30x10x1000=30000pascal
Explanation:
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two glass marbles (1 and 2), each supported by a nylon thread, are rubbed against a piece of silk and then are placed near a third glass marble (3), also supported by a similar thread. assuming that marble 3 has not been in contact with the piece of fabric, which of the following statements best describes the situation when the three marbles are brought together? to keep things simple in this tutorial, we will ignore the effects of
Answers
The correct answer is d.) Marbles 1 and 2 repel each other, but no interaction occurs with marble.
Rubbing the glass against the silk charges the glass positively.
Assuming polarization is ignored,
●Glass won't conduct electrical charge. Therefore, acting as a insulator.
●neutral objects won't distribute it's charge when affected by charge objects in proximity. Therefore, over the marble surface, the charge remain spherically symmetrical (undisturbed)
Marble 1 is positive
Marble 2 is positive
Since marble 1 and 2 are positive, repulsion will occur.
marble 3 is neutral (still assuming polarization is ignored), therefore, no interaction with marble 1 and 2
D is the answer.
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The complete question is:
Two glass marbles (1 and 2), each supported by a nylon thread, are rubbed against a piece of silk and then are placed near a third glass marble (3), also supported by a similar thread. Assuming that marble 3 has not been in contact with the piece of fabric, which of the following statements best describes the situation when the three marbles are brought together?
To keep things simple in this Tutorial, we will ignore the effects of polarization and just focus on the overall charge of each object.
a.) Marbles 1 and 2 attract each other, but no interaction occurs with marble 3.
b.) Both marbles 1 and 2 attract marble 3.
c.) The three marbles will repel each other.
d.) Marbles 1 and 2 repel each other, but no interaction occurs with marble 3.
Formula:
a= F/m
F= mxa
m=F/a
1. A little boy pushes a wagon with his dog in it. The mass of the dog andwagon together is 50 kg. The wagon accelerates at 0.85 m/s2. What force
is the boy pulling with?
Answers
Answer:
42.5 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 50 × 0.85
We have the final answer as
42.5 NHope this helps you
Which phase of matter makes up stars?
Answers
Answer:
Plasma is a phase of matter that makes up stars.
The half life of a radioactive element is 2000 hours. Approximately how much time is required for
the decay of 2/3 of its nuclei?
Answers
Approximately 4300 hours is required for the decay of 2/3 of its nuclei.
Radioactive decay is the random process by which the nuclei of radioactive substances disintegrate into smaller particles. The time taken for half of the radioactive nuclei in a substance to decay is known as the half-life of the substance. In the following paragraphs, I'll explain how to calculate how much time is required for the decay of 2/3 of its nuclei if the half-life of a radioactive element is 2000 hours.The half-life of a radioactive element is the time it takes for half of its original nuclei to decay. The quantity of the substance that has decayed by half of its original quantity is called the half-life. If the half-life of a substance is T, the fraction of the original amount of the substance that remains after a time t is given by the equation:N(t) = N₀(1/2)^(t/T),Where N₀ is the initial number of radioactive nuclei and N(t) is the number of radioactive nuclei remaining after a time t. If we want to know the time it takes for two-thirds of the nuclei to decay, we must solve for t when N(t)/N₀ = 1/3. Putting this into the equation, we have:(1/3)N₀ = N₀(1/2)^(t/T).Simplifying this equation, we get:(1/2)^(t/T) = 1/3.Dividing both sides of the equation by (1/2)^(2000/T), we get:(1/3)/(1/2)^(2000/T) = (1/2)^(t/T - 2000/T).Taking the logarithm of both sides, we get:(t/T - 2000/T)log(1/2) = log(1/3).Simplifying this equation, we get:t/T = -log(1/3)/log(1/2) + 2000/T.To get an approximate solution to this equation, we can make use of the fact that the half-life of a substance is much smaller than the time it takes for most of its nuclei to decay. Therefore, the quantity 2000/T is much larger than one. This allows us to neglect the second term on the right-hand side of the equation. Then we have:t/T = 2.15.Substituting the value of T as 2000 hours, we get:t = 4300 hours.
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The 10/90 principle can help you take control of your situation in taking responsibility of what you can change rather than in being victim of what you cannot change. Give an example of a situation that can change for you in applying this principle.
Answers
The 10/90 principle can be a powerful tool for taking control of your situation and improving your life. By taking responsibility for what you can change and focusing on your reaction to the situation, you can make positive changes in your life and become the master of your own destiny.
The 10/90 principle refers to the idea that life is made up of 10% of what happens to you and 90% of how you respond to it. In other words, you may not be able to control what happens to you, but you can control your reaction to it. By taking responsibility for what you can change rather than being a victim of what you cannot change, you can take control of your situation and improve your life.One example of a situation where the 10/90 principle could be applied is losing a job. Losing a job can be a devastating experience, and it can be easy to feel like a victim in this situation. However, by applying the 10/90 principle, you can take control of your situation and make positive changes in your life.The first step in applying the 10/90 principle in this situation would be to take responsibility for what you can change. This could mean updating your resume, networking with others in your field, and applying for new jobs. By taking action and doing what you can to find a new job, you are taking control of your situation and improving your chances of finding a new job.
The second step would be to focus on your reaction to the situation. Instead of dwelling on the negative aspects of losing your job, try to focus on the positive aspects. This could mean using the extra time to pursue a new hobby or spend more time with family and friends. By focusing on the positive aspects of the situation, you are taking control of your reaction and improving your overall well-being.
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Which of the following diagrams shows the greatest magnitude net torque with a zero net force? All the rods, of length 2r, rotate about an axis that is perpendicular to the rod and fixed in the center of the rod. All the forces are of magnitude F or 2F and all distances from the axis are r or r/2.
Answers
The diagram that shows the greatest magnitude net torque with a zero net force is the diagram in second option.
option B is the correct answer.
What is net torque?
The net torque is the sum of the individual torques. The torque itself is obtained from the product of applied force and the perpendicular distance of the force.
In rotational equilibrium, there is no net torque on the object. There may be individual torques, but they add up to zero and cancel each other out.
Mathematically, the formula for torque is given as;
τ = Fr
where;
F is the applied forcer is the perpendicular distanceThe torque applied to an object increases with increase in the perpendicular distance.
To obtain a zero net force, sum of all the opposite forces applied to an object must be equal to zero.
The forces must be equal in magnitude but opposite in direction, and the diagram that meets this specification is the last graph.
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Heading straight toward the summit of Pikes Peak, an airplane of mass 15000 kg flies over the plains of Kansas at nearly constant altitude of 4.30 km with a constant velocity of 180 m/s west. (a) What is the airplane's vector angular momentum relative to a wheat farmer on the ground directly below the airplane? vector j kg·m2/s (b) Does this value change as the airplane continues its motion along a straight line? yes no (c) What is its angular momentum relative to the summit of Pikes Peak? kg·m2/s
Answers
The airplane's vector angular momentum relative to a wheat farmer on the ground directly below the airplane is 11.61 × 10⁹ j kg m²/s and this value does not change as the airplane continues its motion along a straight line.
Its angular momentum relative to the summit of Pikes Peak is 2.7 × 10⁶ R j kg m²/s, where R is the position vector of the wheat farmer relative to the summit of Pikes Peak.
a) The momentum of the airplane relative to the wheat farmer can be calculated as, Momentum, p = m × v
Thus, Momentum, p = 15000 × 180
Momentum, p = 2.7 × 10⁶ kg m/s
The position vector of the airplane relative to the wheat farmer is given as, 4300 j
The vector angular momentum of the airplane relative to the wheat farmer is given as,
L = r × p
L = 4300 j × 2.7 × 10⁶ kg m/s
L = 11.61 × 10⁹ j kg m²/s
Therefore, the airplane's vector angular momentum relative to a wheat farmer on the ground directly below the airplane is 11.61 × 10⁹ j kg m²/s.
(b) No, this value does not change as the airplane continues its motion along a straight line.
(c) The momentum of the airplane relative to the summit of Pikes Peak can be calculated as, Momentum, p = m × v
Thus, Momentum, p = 15000 × 180 Momentum, p = 2.7 × 10⁶ kg m/s
The position vector of the airplane relative to the summit of Pikes Peak is r' = R + 4300 j
The vector angular momentum of the airplane relative to the summit of Pikes Peak is given as,Vector angular momentum,
L' = r' × p
L' = (R + 4300 j) × 2.7 × 10⁶ kg m/s
L' = R × 2.7 × 10⁶ kg m/s + 4300 j × 2.7 × 10⁶ kg m/s
L' = (2.7 × 10⁶ R) j kg m²/s
Therefore, its angular momentum relative to the summit of Pikes Peak is 2.7 × 10⁶ R j kg m²/s, where R is the position vector of the wheat farmer relative to the summit of Pikes Peak.
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simple but not plagiarized answer for "what is forces and motion?"
Answers
He used all his force in opening the window.
MOTION-the action or process of moving or of changing place or position; movement.
What was the most difficult thing about organizing your store
Answers
Answer:
organizing
Explanation:
thinking about where things should go, to make it so that everybody has an easy experience when inside of my store.
Define temperature using zeroth law of thermodynamics
Answers
Answer:
The scientific meaning for temperature is at the heart of thermodynamics. It arises from the Zeroth Law of thermodynamics that states that if two systems are in thermal equilibrium and one of those systems is in thermal equilibrium with a third system, then all three systems are in thermal equilibrium with each other.
Explanation:
Answer:
The double arrow represents thermal equilibrium between systems.
Explanation:
How are Aurora produced?
O City Lights reflecting or scattered from the atmosphere, O Atmospheric molecules releasing photons (light) in response to lighting strikes
O From the exhaust ports of interplanetary spacecraft.
O Atmospheric molecules releasing photons (light) in response to collisions with Solar Wind particles.
Answers
Answer:
The third one.
Explanation:
Atmospheric molecules releasing photons (light) in response to collisions with Solar Wind particles because when auroras are produced what actually happens is that the ions of the solar wind collide with atoms of oxygen and nitrogen from the Earth's atmosphere. The energy released during these collisions causes a colorful glowing halo around the poles which is the aurora.
I'm trying to slove this problem but I need some help answering it
Answers
Given:
m = 2 x 10^6 kg
v = 93 m/s
SA wings = 1600 m^2
Pressure below - pressure above = weight / Area
P - P' = mg / A
Apply Bernoulli's principle:
P + 1/2 dv^2 = P' + 1/2 d v'^2
P-P' = 1/2 dv'^2 - 1/2dv^2
mg/A = 1/2 d (v'^2 - v^2 )
d = density of air = 1.225 kg/m^3
g = gravity = 9.8 m/s^2
Replacing:
\(\frac{(2x10^{^6})(9.8)}{1600}=\frac{1}{2}(1.225)(v^{\prime2}-93)\)Solve for v'
12,250 = 0.6125 (v'^2 - 93 )
12,250 /0.6125 = v'^2-93
20,000+93 = v'^2
√20,093 = v'
v' = 141.74 m/s = 142 m/s
A ball is thrown straight up. At the top of its path is instantaneous speed is
Answers
Answer:
If a ball is thrown straight up, its instantaneous velocity at the top of its path is 0 m/s, but its acceleration is 10 m/s2. ... Its acceleration can't be zero - that would mean that its velocity would not change
Explanation:
When a ball is hurled straight up, it has an instantaneous top speed of 0 m/s but an acceleration of 10 m/s². Since its velocity wouldn't change if its acceleration were zero, it can't be.
What is instantaneous speed?The instantaneous speed, as its name suggests, has to do with how fast an item is moving at a particular moment in time. The brief distance that an object has gone divided by the equivalent amount of time can also be used to determine its instantaneous speed. With each instant that passes, the instantaneous speed can fluctuate.
An automobile's speedometer, for instance, displays the vehicle's current speed. The instantaneous speed of the car might be 50 kmph at one point, and with a light press of the pedal, it might increase to 54 kmph at the next.
When the ball is thrown straight up, with the increase in height the speed of the ball starts to reduce, at the top the speed will become zero.
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when air mass is caught between two cold fronts the result is a _______ front.
Answer choices
A.occluded
B.warm
C.cold
D.stationary
Answers
Explanation- At an occluded front, the cold air mass from the cold front meets the cool air that was ahead of the warm front.
water vapor is what kind of gas?
Answers
Answer:
the gaseous phase of water
Explanation:
"It is one state of water within the hydrosphere. Water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. "
hope this helps!!
Water vapor is a greenhouse gas.
I know this is a simple answer, but I sincerely hope this helped!
a car accelerate uniformly from rest to a speed of 20m/s in 8seconds.the mass of the car is 1200kg. calculate the acceleration of the car
Answers
Answer:3000
Explanation:
given:u=0v=20m/st= 8sec
thereforea=v-u/t=20-0/8=20/8=5/2 m/som=1200 kg
thereforef=ma=1200*5/2=600*5=3000N
a graph compares the weight and height of several different breeds of cat. What type of model is the graph?
Answers
Answer: Mathematical Model
Explanation:
Took the test
A plane is traveling at 80 m/s. To prepare for landing, itslows down at a rate of 0.25 ms squared for 120 seconds. Calculate the speed of the plane after it decelerates. I’ll give brainliest and everything to whoever gets it right please
Answers
Answer:
The speed of the plane after it decelerates is 50 m/s
Explanation:
Motion with Constant Acceleration
When an object gains or losses velocity in time, it acquires acceleration. If this value is constant, we can calculate the final velocity (or speed in scalar terms) as:
\(v_f=v_o+at\)
Where vf is the final speed, vo is the initial speed, a is the constant acceleration, and t is the time the acceleration is acting.
The plane is originally traveling at vo=80 m/s and it slows down at a constant rate of \(a=-0.25\ m/s^2\) during t=120 seconds. Note we have added the negative sign to the acceleration because the plane is slowing down, i.e., the acceleration is against the speed.
Thus, the final speed is:
\(v_f=80-0.25*120\)
\(v_f=80-30=50\)
\(v_f = 50\ m/s\)
The speed of the plane after it decelerates is 50 m/s
A certain net force acting on a 5kg mass produces an acceleration of 2 m/s2 calculate the force
Answers
Answer:
10 N
Explanation:
Newton's Second Law equation: Fnet = ma
Assuming no frictional force, plug in the values to get your answer!
Fnet = 5kg x 2m/s^2 = 10 N
Can heating cooking oil you’ll be classified as producing a chemical change?
Answers
yes it is boiling creating bubbles that aren't their originally
Explanation:
When cooking oils are subjected to heat in the presence of air and water (from food), such as in deep-fat frying and sautéing (pan frying), they can undergo at least three chemical changes: 1) oxidation of the fatty acids, 2) polymerization of the fatty acids, and 3) breaking apart of the triglyceride molecules into free fatty acids and glycerol by hydrolysis (reaction with water from the food being cooked) (Choe and Min 2007)
A wave has an amplitude of 0.0800 m
and is moving 7.33 m/s. One oscillator
in the wave takes 0.230 s to go from
one crest to the next crest. Find the
wavelength of the wave.
(Unit = m)
Answers
If a wave has an amplitude of 0.0800 m and is moving 7.33 m/s. The
wavelength of the wave is 1.69m.
What is the wavelength?The wavelength of a wave can be determined using the equation:
Wavelength = velocity / frequency
To determine the frequency we need to calculate the reciprocal of the time it takes for one complete oscillation.
frequency = 1 / time
frequency = 1 / 0.230
frequency ≈ 4.35 Hz
Substitute the values into the wavelength equation:
wavelength = velocity / frequency
wavelength = 7.33 / 4.35
wavelength ≈ 1.69m
Therefore the wavelength of the wave is approximately 1.69 meters.
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An object starts from rest at the origin and moves along the x axis with a constant
acceleration of 4 m/s
2
. Its average velocity as it goes from x = 2 m to x = 8 m is:
Answers
Answer:
6.9m/s
Explanation:
Given parameters:
Acceleration of the object = 4m/s²
Distance = from x; 2m to x; 8m
Unknown:
Average velocity = ?
Solution:
From the given parameters, we use the right motion equation to solve the problem.
v² = u² + 2aS
v is the final velocity
u is the initial velocity
a is the acceleration
S is the distance covered
Distance = 8m - 2m = 6m
Initial velocity = 0m/s
The final velocity gives us the average velocity in this problem;
v² = 0² + (2 x 4 x 6) = 48
v = √48 = 6.9m/s
A boy slides a book across the floor, using a force of 5 N over a distance of 2
m. What is the kinetic energy of the book after he slides it? Assume there is
no friction.
A. 5 J
B. 10 J
C. 20 J
D. 2.5 J
SUBMIT
Answers
The kinetic energy of the book after it is slids a distance of 2 meters will be 10 Joules.
How to determine the kinetic energy of an object?The work-energy theorem states that "the work done on an object is the change in its kinetic energy".
Hence;
Kinetic energy = work done
Note that: work-done is expressed as:
Work done = f × d
Where f is force applied and d is distance traveled.
Given that:
Force applied f = 5 newton
Distance d = 2 meters
Work done = ?
Plug these values into the above formula and solve for the workdone.
Work done = f × d
Work done = 5N × 2m
Work done = 10Nm
Work done = 10 Joules
Therefore, the kinetic energy is 10 Joules.
Option B) 10 J is the correct answer.
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A rod of length 2a with total charge Q uniformly distributed along its length is placed along the zaxis with its center at the origin. Find the electric field everywhere?
Answers
The electric field due to a charged rod of length 2a with total charge q uniformly distributed along its length, placed along the z axis with its center at the origin.
Through the application of Coulomb's equation and the concept of superposition, we can determine the electric field everywhere caused by the charged rod. The electric field due to a tiny piece of the rod at a point P in space is given by:
dE = k dq / r²
where
k = Coulomb's constant,
dq i= the segment's charge,
r = the segment's distance from point P, and
dE = the segment's contribution to the electric field.
We integrate this formula along the entire length of the rod, from -a to +a, to determine the total electric field at P as follows:
E = ∫ dE = k ∫ dq / r²
where the rod's length is used as the integral. The charge per unit length of the rod, or dq, can be expressed in terms of the charge density as dq = ds, where ds is an element along the rod with an infinitesimal length. r = √(s² + z²) where z is the segment's distance from the z axis, we can also describe r in terms of the distance s from the origin to the segment.
E = k ∫ dq / r^2 = k ∫ λ ds / (s² + z²)
E = k λ z ∫_{-arctan(a/z)}^{arctan(a/z)} dθ / (1 + (a/z)² tan² θ)
E = k λ z / (2πε_0) ∫_{-a/z}^{a/z} du / (1 + u²)
E = k λ z / (2πε_0) [arctan(a/z) - arctan(-a/z)]
E = k λ a / (2πε_0 z√(a² + z²))
This is the equation for the electric field produced by a charged rod of length 2a, arranged along the z axis with its center at the origin, and with total charge q evenly distributed throughout its length. The electric field radiates outward from the rod, and as you move away from the rod, its strength diminishes as 1/r².
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What forces are acting on the balloon as it is held in a person hand?
Answers
Answer: DADDY
Explanation: