Which of the following properties are vectors and which are scalars considering a three-dimensional space? Give a “typical” symbol and the S.I. units used to describe these properties, i.e. if I asked for mass density you would answer: ρ is a scalar in units g cm3 = 103 kg m3 ; maybe even state ρ = m V . a) force b) mass c) angular displacement d) energy e) linear acceleration f) the period of a pendulum g) work h) torque i) moment of inertia j) linear momentum

You toss a ball straight up. Let t = 0 be the time just after you throw the ball, let t = treturn be the time just before it the ball returns to your hand (motion is in free fall). The only knowns are treturn, g, H (max height), Viy. Use yf = yi+Viy(deltat) -(1/2)g(delta t)^2 to determine the two times when the ball is at half of its maximum height.

why there is an air specific sound of velocity around us? the answer must include analytics description using basic relations perspective

1. Explain the difference between resolution and magnification. Refer to the following scenario when preparing your response.
   If I have 500nm light exciting an object through a 100X NA=1 objective, what is the approximate resolution of the image?                                               (1 page limit)

Particle A of mass m, initial velocity 20i (m/s) has a collision with a stationary particle B of mass 2m. After collision, VA(final)=10i+5j (m/s). a) Find VB(final) if the system (particle A plus B) linear momentum is conserved (both i and j directions). What are the velocities of center of the system before and after collision?b) Find the system’s % KE lost due to the collision (m=20.0gram). c) If the collision time between A and B is 0.050 s, what is the average force between A and B during the collision?

If β = a / V, κ = b / V for a hypothetical system and a and b are constant then the system equation for the system can be written as follows

V = aT - bP + constsant
Select one:
True
False

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The relationship Tds = dh-vdP is only valid for reversible operations

Select one:
True
False

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If an operation is performed on an ideal gas so that the relationship PV2 = constant is achieved, then this means that the relationship TP-1/2 = constant is achieved.

Select one:
True
False

When graphing nuclear binding energy per nucleon vs the number of nucleons in the nucleus, the significance of the peak near iron-56 is

Choose one:

a. if it was possible to make a atomic bomb from iron-56 it would release more energy than even a hydrogen bomb

b. the nuclei heavier than iron release energy when undergoing fission, whereas lighter nuclei can release energy in fusion reactions.

c. Spacecraft can be shielded with iron-56 to protect the astronauts from dangerous radiation

d. isotopes with even numbers of nucleons are the most stable

Work-Energy Theorem:

1. Give an example of an explanation you devised to your friend or classmate to make him/her understand what you were talking about. What representations did you use (analogy, graph, equation etc.) when you were explaining to him/her? Do you think using more than one representation helps you explain better? If so, why do you think it helps?

2. For the same explanation above, please try to identify what assumptions you made. Why did you make the assumption/assumptions? In other words, what do you think are the functions of your assumption(s) when you devise your explanation?

(1)Write down the 4 Maxwell Equations, Explain each of them in detail, What are their aplication?.
(2)Write and solve one question from each.

PHYSICS 123

The project is "Physics of Everyday Objects and Phenomena"

You can choose your project and write the INTRODUCTION-OBJECTIVE, MATERIALS, DATA ONLINE RESEARCH (SI-UNITS), THEORY AND EQUATIONS,CALCULATIONS, CONCLUSION, however it should be about the chapters that we have seen in this class.

Objects and Phenomena:

Physics of a ball at any sports game and a typical motion and typical interactions of the ball with the players.

Physics of a yo-yo, skateboard, simple machines, skiing, bicycle tire, NASCAR race, tree cutting, heating-cooling-heat engines, hot air balloon, plumbing etc. A template is uploaded below this line.

A binary geothermal power plant uses geothermal water at 160°C as the heat source. The plant operates on the simple Rankine cycle with isobutane as the working fluid. Heat is transferred to the cycle by a heat exchanger in which geothermal liquid water enters at 160°C at a rate of 555.9 kg/s and leaves at 90°C. Isobutane enters the turbine at 3.25 MPa and 147°C and leaves at 79.5°C and 410 kPa. Isobutane is condensed in an air-cooled condenser and pumped to the heat exchanger pressure. Assume that the pump to has an isentropic efficiency of 90 percent. Take the specific heat of geothermal water is taken to be 4.258 kJ/kg·C. The properties of isobutane are given as h1 = 273.01 kJ/kg, v1 = 0.001842 m3/kg, h3 = 761.54 kJ/kg, h4 = 689.74 kJ/kg, and h4s = 670.40 kJ/kg. (a) the isentropic efficiency of the turbine, (b) the net power output of the plant, and (c) the thermal efficiency of the cycle.

In a Young's double-slit experiment the wavelength of light used is 462 nm (in vacuum), and the separation between the slits is 2.1 × 10^-6 m. Determine the angle that locates (a) the dark fringe for which m = 0, (b) the bright fringe for which m = 1, (c) the dark fringe for which m = 1, and (d) the bright fringe for which m = 2.

Calculate the maximum acceleration of a car with four wheel drive that is heading up a 8° slope (one that makes an angle of 8° with the horizontal) under the following road conditions. Assume that the static coefficient of friction is involved--that is, the tires are not allowed to slip during the acceleration.

(a) on dry concrete
________m/s²
(b) on wet concrete
_________ m/s²
(c) on ice, assuming that µ_s = 0.100, the same as for shoes on ice
_________m/s²

Procedure

M=270 g (hanger +220g); Tape the 220 g to the hanger that is 50g

m=250g (hanger +200g); Tape the 200 g to the hanger that is 50g

Set the apparatus so that when m is on the floor, M is at height h=1.50m; Make sure you measure and record the actual value of h that you use.

Release the system from rest and measure the time taken for m1 to fall on the floor.

SAFETY – When M hits the floor it becomes a free projectile; have a group member catch it!!!!

You will perform 5 trials and record the data in the following

Table 1:                                                                                                                                                         

Trial #

Time, second

1

5.55

2

5.43

3

5.71

4

5.38

5

5.66

Data and Calculation

Determine the average time tav from your data in Table 1.

In order to determine the final velocity of mass m1 just before it hits the floor you can use:

Method 1:

It can be shown that the final velocity of the mass m1is given by eq. (1):

h=12(vi+vf)t eq. (1)

Method 2:

Since mass M started from rest we could also use

vf=vi+at eq. (2)

The following equation for the acceleration of the Atwood machine can be derived using FBD:

a=M-mM+mg eq. (3)

Calculating Energy

Calculate the final kinetic energy KEf , and the final potential energy PEf using the following equations:

KEf=12(M+m)vf2 eq. (4)

PE=mgh                    eq. (5)

The final total energy is given by:

Ef=Kf+PEf             eq. (6)

(Note: mass needs to be in kilograms if you are reporting the energy in units of Joules).

Record the final velocity, obtained using Method 1 and Method 2 in Table 2 below.

Table 2:

Method #

vf, m/s

1

2

Using the equations above, compute the initial and final total mechanical energy of the system for each of the final velocities (from Method 1 and Method 2) and record your results in Table 3 below.

Table 3:

Method #

Ei=PEi+Ki

(J)

Ef=PEf+Kf

(J)

Percentage difference

1

2

If total energy is conserved, then Ei=Ef. Find the percentage difference between the two measured values of Ei and Ef, using the following formula:

%difference = Ei-EfEi+Ef2×100

Analysis:

Answer the following questions:

Based on your experiment would you conclude that the mechanical energy was conserved?

How much (if any) energy was lost (or gained)?

Where did the energy go or come from?

What are the sources of error?

Which of the two methods used to compute the final velocity is better suited for this experiment and why?

Based on your knowledge of principle of conservation of mechanical energy when forces are conservative, answer the following conceptual questions using the words - increase, decrease, or         remains the same. Refer to figure 1. The gravitational potential energy reference level will be the ground as indicated by y=0.

As m rises, what happens to its gravitational potential energy?__________

As M falls, what happens to its gravitational potential energy? __________

As the masses move what happens to the total gravitational potential energy of the system? __________

As M falls, what happens to its kinetic energy? __________

As m rises, what happens to its kinetic energy? __________

As the masses move what happens to the total kinetic energy of the system? __________

Assuming no friction, as m rises and M falls, what happens to the total mechanical energy of the system? __________

Determine your own power rating by measuring the time it takes you to climb a flight of stairs. Ignore the gain in kinetic energy.   Do 5 trials and submit the table below.    Outline the strategy for obtaining your data and provide the calculations you used to determine you power (hint: refer to example 7.11 in the text).

Trial #

Time, second

1

2

3

4

5

In the circuit at right, switch S is closed, and is held that way for a very long time. The central branch of the circuit, having resistance R, has negligible self-inductance, but the branch of the right, having resistance 2R, has a non-negligible self-inductance L. If the switch is suddenly opened, what will be the voltage across the inductor at that instant? Express your answer as a fraction or multiple of ℰ, and make sure to explain which side of the inductor (top or bottom) is at higher poential.

https://drive.google.com/open?id=1BUQHfC24hwy810Vc2yNRgYmam6c6LMOn