PHYS 204A Midterm: PHYS 204A Chico State Exam 4 Fall 12

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turquoisegnu128

31 Jan 2019

School

Chico State University

Department

Physics

Course

PHYS 204A

Professor

All

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Math 141 exam 3 review: p(e)=0. 5, p(f)=0. 6 p(e f)=0. 9 find. E : p, a fair coin is tossed 7 times and the sequence of heads and tails is recorded. The random variable, x, is the number of red balls chosen: write out the probability distribution of x, find e(x, ten friends sign up for a course and each is assigned to one of 15 different sections. This is like the birthday problem: each dorm room at a certain campus holds 4 people. His test will consist of 10 of the questions. 9 a person tosses a fair coin 4 times. Show why or why not: in a town in the 1920"s , 70% of the voters were farmers, 20% were merchants and. In the mayoral election, 60% of the farmers voted for the democrat, 30% of the merchants voted for the democrat and 70% of the others voted for the democrat.

Related Questions

1)Three dice with 6 faces each are tossed. Find the followingprobability:
a) to get exactly one "5" and one "6", P(5, 6);
b) to get exactly two "3", P(3, 3);
c) to get exactly two "3" and one "6", P(3, 3, 6);
d) to get "6" in none of the dice, P(no 6).

2)The intrinsic energy of the oscillator of the Problem 1 can takethree values. The state with the energy e1 is not degenerate andconsists of a single quantum state. The second energy stateconsists of three different quantum substates with the same energye2. The third energy state consists of five different quantumsubstates with the same energy e3. A system of N such oscillatorsis in thermodynamic equilibrium at temperature T.
Find
a) probability that the oscillator in one of the three substateswith the intrinsic energy
e2;
b) probability that the oscillator has the energy e2;
c) the average numbers of molecules (N1, N2, N3) in each of theenergy states;

Goal Use the superposition principle to calculate the electricfield due to two point charges.

Problem Charge q1 = 7.00 ÂµC is at the origin, and charge q2 = -5.35ÂµC is on the x-axis, 0.300 m from the origin (Fig. 15.12).

(a) Find the magnitude and direction of the electric field at pointP, which has coordinates (0, 0.400) m.

(b) Find the force on a charge of 2.00 10-8 C placed at P.

(a) Calculate the electric field at P.
Find the magnitude of 1 with Equation 15.6.
E1 = 3.93 105 N/C
Vector 1 is vertical, making an angle of 90Â° with respect to thepositive x-axis. Use this fact to find its components. E1x = E1cos(90Â°) = 0
E1y = E1 sin(90Â°) = 3.93 105 N/C
Next, find the magnitude of 2, again with Equation 15.6.
E2 = 1.92 105 N/C
Obtain the x-component of 2, using the triangle in Figure 15.12 tofind cos ?.
E2x = E2 cos ? = (1.92 105 N/C)(0.600)
E2x = 1.15 105 N/C
Obtain the y-component in the same way, but a minus sign has to beprovided for sin ? because this component is directeddownward.
E2y = E2 sin ? = (1.92 105 N/C)(0.800)
E2y = -1.54 105 N/C
Sum the x-components to get the x-component of the resultantvector. Ex = E1x2x = 0 + 1.15 105 N/C
Ex = 1 N/C
+ E
Sum the y-components to get the y-component of the resultantvector. Ey = E1y2y = 3.93 105 N/C - 1.54 105 N/C
Ey = 2 N/C
+ E
Use the Pythagorean theorem to find the magnitude of the resultantvector.
E = 3 N/C

The inverse tangent function yields the direction of the resultantvector.
? = 4Â°

(b) Find the force on a charge of 2.00 10-8 C placed at P.
Calculate the magnitude of the force (the direction is the same asthat of because the charge is positive). F = Eq = E(2.00 10-8C)
F = 5 N

(a) Place a charge of -3.60 ÂµC at point P and find the magnitudeand direction of the electric field at the location of q2.

E = N/C

? = Â° counterclockwise from the positive x-axis

(b) Find the magnitude and direction of the force on q2.

F = N

? = Â° counterclockwise from the positive x-axis

I Don't know how to do this Please help Me. Thank you. The top partis how i figured out the rest i think its the missing informationto solve the bottom part.

A projectile is shot from the edge of a cliff h = 225 m aboveground level with an initial speed of v0 = 125 m/s at an angle of37.0Â° with the horizontal, as shown in Fig. 3-35.

(a) Determine the time taken by the projectile to hit point Pat ground level.
s
(b) Determine the range X of the projectileas measured from the base of the cliff.
km
(c) At the instant just before theprojectile hits point P, find the horizontal and the verticalcomponents of its velocity. (Take up and to the right as positivedirections.)
horizontal m/s
vertical m/s
(d) What is the the magnitude of thevelocity?
m/s
(e) What is the angle made by

the velocity vector with the horizontal?
Â° (below the horizontal)
(f) Find the maximum height above the clifftop reached by the projectile.
m

PHYS 204A Midterm: PHYS 204A Chico State Exam 4 Fall 12

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