1. What ROTATIONAL concepts are the HARDEST for you to understand and WHY? You can make an answer from your own experience, 150+ words needed

In the simulation, for the Rutherford model, which of the following possible observations is correct when you use greater energies?

The incoming particles can reach closer to the nuclei.

Their trajectories bend more.   

The particles lose more energy before exiting the target area.

The particles spread over a larger area.

The particles are able to break apart some of the target nuclei.

The particles excite higher electronic energy states.

show that the relaxation time for a heavily damped rlc circuit is RC

A target in a shooting gallery consists of a vertical square wooden board, 0.230 m on a side and with mass 0.700 kg , that pivots on a horizontal axis along its top edge. The board is struck face-on at its center by a bullet with mass 1.60 g that is traveling at 355 m/s and that remains embedded in the board.

A. What is the angular speed of the board just after the bullet's impact?

B. What maximum height above the equilibrium position does the center of the board reach before starting to swing down again?

C. What minimum bullet speed would be required for the board to swing all the way over after impact?

Assume that a star’s luminosity is given by L ∝ M^3.5 for all masses. After a burst of star formation, does most of the stellar luminosity come from low-mass stars or high-mass stars? Justify your answer quantitatively.

What is the average stellar luminosity?

What is the mass of a star with the average luminosity?

Taking a gas to be ideal and confined to a rigid metal box, find an expression for how quickly the mean free path of said gas changes if the temperature is dropping cubically with time (​T​=​T​0- At^3) If the initial pressure of the gas is 105 Pa, the intermolecular radius is 2 Ångström, and the initial temperature is 325 K and drops 1 K in the first second, what is the rate of change of the mean free path with respect to time after 6 seconds?

Laboratory of Physics - Study of Movement (Pleaseee I need this laboratorio answers)

PROCEDURE:
PART A.
Follow the instructions below:

1 Develop a procedure to determine how fast you walk. In that procedure, you should clearly state what materials you need, what data you need to collect, and any instruments you need for data collection.

2. Design a table to collect the data from your experiment.

3 If you were to submit a report on the experiment you designed, what parts would you include in that report?

4. In the experiment you designed, what are the two variables you need to relate to solve the problem at hand, what is the independent variable, and what is the dependent variable in the experiment?

5.Design a second procedure to solve the same problem. Invert the two variables, that is, the independent variable previously will now be the dependent variable and the dependent variable will be the independent variable.

Post a two paragraph summary about an object or a system involving the movement of a fluid (gas, liquid or plasma). Please explain this

Draw a free body diagram for a satellite in an elliptical orbit showing why its speed increases as it approaches its parent body and decreases as it moves away

You are an industrial engineer with a shipping company. As part of the package-handling system, a small box with mass 1.70 kg is placed against a light spring that is compressed 0.280 m. The spring has force constant 41.0 N/m . The spring and box are released from rest, and the box travels along a horizontal surface for which the coefficient of kinetic friction with the box is μk = 0.300. When the box has traveled 0.280 m and the spring has reached its equilibrium length, the box loses contact with the spring.

1-What is the speed of the box at the instant when it leaves the spring?

Express your answer with the appropriate units.

2-What is the maximum speed of the box during its motion?

Express your answer with the appropriate units.

Driving in your car with a constant speed of 12 m/s, you encounter a bump in the road that has a circular cross section, as indicated in the figure. If the radius of curvature of the bump is r = 31 m, find the apparent weight of a 54-kg person in your car as you pass over the top of the bump. N

In an XRD pattern using Cu Kα radiation, a certain cubic crystal shows peaks at 2θ values (in degrees) of 44.3, 64.4, 81.6, 98.0. It is known that the size of the cubic crystal is greater than 2.5 Angstroms. Based on this information and the location of the peaks, we conclude that the lattice of the crystal is

1. simple cubic                        2. face centered cubic

3.     body centered cubic        4.    none of the other choices