x y
11 7.74
9 6.61
12 12.98
10 7.14
12 7.88
13 8.68
5 6.06
4 5.24
13 8.3
7 6.61
6 5.93...
Find the equation of the regression line.
y = mx + b
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A 0.3 Kg ball is initially at rest at the top left side of a frictionless incline plane: The incline is 0.25 m height and has a length of 0.65 m.
a) What is the initial Gravitational Potential Energy of the Ball at the top of the incline? b) What will be the final Kinetic energy of the ball at the bottom right side of the incline? c) If there were friction between the ball and the incline, what would happen to the final Kinetic energy of the ball at the bottom of the incline? Increase, decrease, or states the same?
In: Physics
Part A
An electron is moving east in a uniform electric field of 1.52 N/C directed to the west. At point A, the velocity of the electron is 4.54×105 m/s pointed toward the east. What is the speed of the electron when it reaches point B, which is a distance of 0.360 m east of point A?
Part B
A proton is moving in the uniform electric field of part A. At point A, the velocity of the proton is 1.89×104 m/s , again pointed towards the east. What is the speed of the proton at point B?
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A charge per unit length λ = +6.00 μC/m is uniformly distributed along the positive y-axis from y = 0 to y = +a = +0.400 m. A charge per unit length λ = -6.00 μC/m, is uniformly distributed along the negative y-axis from y = 0 to y = –a = -0.400 m. What is the magnitude of the electric field at a point on the x-axis a distance x = 0.271 m from the origin?
In: Physics
Annotate these equations
v=d/t a=∆v/t average speed =total distance/total time v=v0+at d=v0t+1/2at² Fnet=ma w=mg ac=v²/r Fc=mv²/r W=Fd P=W/t
EK=1/2mv² W= ∆EK Es=1/2kx² Eg=mgh TC=5/9(TF−32) TF=9/5TC+ 32 TK=TC+ 273 Q=mc∆t Q=±mL
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An ice cube of mass 0.029 kg and temperature -13 ∘C is dropped into a styrofoam cup containing water of mass 0.4 kg and temperature 20 ∘C. Calculate the final temperature in degrees celcius and give your answer to one decimal place. (For simplicity, we ignore here the temperature change of the cup.)
The specific heat of ice is 2200 J/kg ∘C and the specific heat of water is 4186 J/kg ∘C. The latent heat of fusion of ice is 334000 J/kg ∘C.
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4. Two carts collide and stick together in a lab experiment. Cart 1 has a mass of 550 g and a speed before the collision of 2.5 m/s. Cart 2 has a mass of 320 g and a speed of -4.1 m/s. Consider the 2 carts to be the system.
A. What is the total momentum of the system before the collision?
B. What is the velocity of the 2 carts after the collision?
C. If the collision takes 0.15s, what is the average force and acceleration experienced by each cart? Explain any differences between the answers for the 2 carts.
D. What speed would cart 2 need to have for the carts to be stationary after the collision?
In: Physics
Item 3.8
An X-ray photon scatters from a free electron at rest at an angle of 125 ∘ relative to the incident direction.
Part A
If the scattered photon has a wavelength of 0.310 nm, what is the wavelength of the incident photon? Express your answer using three significant figures.
Part B
Determine the energy of the incident photon.Express your answer using three significant figures.(end unit is keV)
Part C
Determine the energy of the scattered photon. Express your answer using three significant figures.(end unit is keV)
Part D
Find the kinetic energy of the recoil electron.Express your answer using one significant figure.(end unit is eV)
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Explain why the principle of conservation of mass is not true for any process that releases energy (or requires energy input). Why didn't anyone predict or observe this until the 1900s?
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In a location where the speed of sound is 332 m/s, a 2,000 Hz sound wave impinges on two slits 30 cm apart.
(a) At what angle is the first-order maximum located?
°
(b) If the sound wave is replaced by 4.60 cm microwaves, what slit
separation gives the same angle for the first-order maximum?
cm
(c) If the slit separation is 1.00 μm, what frequency of
light gives the same first-order maximum angle?
Hz
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A new set of fiber-reinforced composite is designed to support the body function. Compute the longitudinal tensile strength of this fiber–epoxy matrix biocomposite in which the average fiber diameter and length are 0.018 mm and 2.2 mm, respectively, and the volume fraction of fibers is 0.35. Assume that the fiber–matrix bond strength is 122 MPa, the fracture strength of the fibers is 3800 MPa, and the matrix stress at composite failure is 5.9 MPa.
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Explain with circuits and plots for the voltage and current relations in R, L, and C circuits separately? What is impendence? How resonance occurs in an AC circuit?
Explain RLC series circuit? Write impedance? What is power in A.C circuit? Explain resonance in AC circuit with examples?
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A) A body falls on the ground from a height of 10 m and rebounds to a height of 2.5 m. Calculate the percentage loss of kinetic energy of the body during its collision with the ground.
B) A bomb explodes into two fragments of masses 3.0 kg and 1.0 kg. The total kinetic energy of the fragment is 6x10^4 joule. calculate the kinetic energy of the bigger fragment, and the momentum of the smaller fragment.
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What electronic circuit would you use to measure the gait variability of an individual? What electronic signal would be produced by this circuit? What processing steps would you carry out on this signal to determine the individual’s gait variability?
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How does intensity profiles of Large opening and Incoherent Light different from the intensity profiles of Small slits with Incoherent Light?
Please use diagram to explain. Thank you in advance for your help.
In: Physics