From Chapter 2 (Motion Along A Straight Line) select and explain in your own words two of the following 6 learning goals. Then find someone else post discussing a different learning goal than you explained, review their explanation and add anything they may have missed that you feel is important.

2.1 - How do the ideas of displacement and average velocity help us describe straight line motion?

2.2 - What is the meaning of instantaneous velocity; and what is the difference between velocity and speed?

2.3 - How does one use average acceleration and instantaneous acceleration to describe changes in velocity

2.4 - How does one use equations and graphs to solve problems that involve straight-line motion with constant Acceleration?

2.5 - How does we go about solving problems in which an object is falling freely under the influence of gravity alone?

2.6 - How does one analyze straight-line motion when the acceleration is not constant?

please type your answer you don't have to draw just type it

Why are satellites normally sent into orbit by firing them in an easterly direction? Based on this, explain why the International Space Station (ISS) orbits the Earth at about 17,500 miles per hour at an altitude above Earth’s surface of about 230 miles. Would it be more efficient to have a higher or lower orbit for the ISS? Explain in detail why or why not.

Consider an X-ray beam of wavelength 0.1 nm and a gamma ray beam of wavelength 0.00188 nm. if each is scattered by an angle of 90 degrees by a free electron, what is the compton shift in the wavelength of the rays? in each case also determine the kinetic energy transferred to the recoiling electron and how much of the incident energy in the rays is lost.

23. Consider a 2D spacetime whose metric is: ds^2 = −dt^2 + [f(q)]^2 dq^2 (3) where f(q) is any function of the spatial coordinate q. a) Show that the t component of the geodesic equation implies that dt dτ is contant for a geodesic. b) The q component of the geodesic equation is hard to integrate, but show that requiring u · u = −1 implies that f dq dτ is a constant for a geodesic. c) Argue then that the trajectory q(t) of a free particle in this spacetime is such that dq dt = constant f . d) Imagine that we transform to a new coordinate system with coordinates t and x where x = F(q) and F(q) is the antiderivative of f(q). Show that the metric in the new coordinate system is the metric for flat spacetime, so the spacetime described by equation 3 is simply flat spacetime in disguise. We know geodesics in flat spacetime obey dx dτ = (f dq) dτ = constant, so the result in part b) is not surprising.

A pendulum has a length 1 m and a mass 1 kg. Assume Earth free fall acceleration equal to 10 m/s^2. When the pendulum oscillates, the maximal deflection angle is +/-1 degree.

1.Suppose the pendulum started losing energy at the rate 1% per period. As a result, the energy of the pendulum drops according to E(t)= E(t=0)*exp(-z*t). Let’s call z damping constant, it has units 1/sec.

a) Find Z

b) Sketch E(t) for the time span of a few hundred periods.

c) How long will it take before the energy drops to half of the initial value at t=0?

d) How long will it take before the max deflection angle drops to half of the initial value at t=0?

e) If the damping was produced by a force given by F = -v*k, where v is the velocity and k is some friction coefficient, find k.

f) Suppose you are aiming to excite a resonance of this pendulum by kicking it with a periodically modulated force at a frequency f. What should be f in Hz and approximately how accurately should you be able to adjust f, i.e. f +/-how much?

Compare series circuits and parallel circuits. What are three differences between series circuits and parallel circuits? What are some advantages of using parallel circuits instead of series circuits? Answer in 1-2 paragraphs.

Provide some background information of the "Physics on froth Decay" and briefly explain 2 experiments to showcase it.

How is the sound different when both tuning forks C AND C prime as opposed to a signal tuning are ringing?

Why the measured beat minimum amplitude is not zero try to create empirical formulas for A_beat_max=f (Ac, Ac’) and A_beat_min=f (Ac, Ac’):

List the frequencies found for the tuning forks and how do these frequencies compare to the frequencies of the notes given in lecture?

Study the energy diagram of ⁶⁰Co deacay. what radiation is produced in addition to the two gamma rays?

thanx in advance

1. The magnitude of the electric field due to a small charged object is 12N/C at a distance of 6m from the charge. What is the field 3m away from the charge?

2. Two charged spheres, 3 cm apart, repel each other with a force of 2.4 x10^-8N. Determine the magnitude and sign of the charge on each, if one has twice the charge (of the same sign) as the other.

3. Calculate the electric field intensity midway between two negative charges of 4.3 x10^-9C and 8.6 x10^-6 that are 20cm apart. Include a diagram of the situation.

ps. Plz show your steps so I follow. Much thanks

a) What is the magnitude of the tangential acceleration of a bug on the rim of a 10.5-in.-diameter disk if the disk accelerates uniformly from rest to an angular speed of 76.0 rev/min in 3.70 s? _____m/s^2

b) When the disk is at its final speed, what is the magnitude of the tangential velocity of the bug? ______ m/s

c) One second after the bug starts from rest, what is the magnitude of its tangential acceleration? ______ m/s^2

d) One second after the bug starts from rest, what is the magnitude of its centripetal acceleration? _______ m/s^2

e) One second after the bug starts from rest, what is its total acceleration? (Take the positive direction to be in the direction of motion.)

magnitude _______ m/s^2

direction _________ ° from the radially inward direction

How would you identify the anode of an unmarked diode?

What is the significance, if any, of the reverse-to-forward resistance ratio of a diode?

How do you identify a germanium from a silicon diode?