2. Answer the following questions about the motion of an object launched from the roof of a building with a height of 10 m at an initial velocity of 20 m/s and an angle of 60°. (1) Find the x and y components of the initial velocity. (2) Find the x and y components of the velocity after 2.0 seconds. (3) Find the time to reach the highest point. (4) Find the height of the highest point. (5) Find the time until it falls to the ground.

A satellite is launched into an orbit at an altitude 200 km above the surface. Onboard is an exquisitely sensitive atomic clock that is synchronized with an identical clock on Earth. After orbiting for one year, the satellite is captured, returned to Earth, and the clocks compared. What will be the shift in time between the two clocks?

Two solid spheres are running down from incline of height 3.7 m. Sphere A has mass 3.3 kg; radius 15.7 cm; sphere B has mass 7.4 kg and radius of 39.3 cm. Find the ratio of their angular velocities omegaA/omegaB at the bottom of the incline.

1. (Experiment)

Measure all the dimension of the four objects and fill out the table below. As the ‘proof’ that you did the experiments, take a screenshot of your PC screen for at least one dimension of each and insert (copy and paste) the screenshots to the end of this data sheet. (For Window’s users, ‘snipping tool’ is convenient to take a screenshot. You can search the tool by searching ‘snipping tool’ on Windows Search. For Mac users, press ‘Command’ + ‘Shift’ + ‘3’ to capture a screenshot). Also, calculate the volume of each object using the following formulas. The volume of the sphere of dimeter reads

Eq. 1

the volume of the block of length , breadth as and thickness

Eq. 2

the volume of the cylinder of dimeter and height

, Eq. 3

and the volume of the beaker of internal diameter and the internal height (depth)

Eq.4

Please Type Answer

A person who has their feet spread apart, when pushed against by another person is able to stay stable. A person who has their feet together, when pushed against by another person is not stable at all. What is the reason for this? Take into consideration the mechanical principles in relation to torque, levers, area of supporting base, and position of your center of gravity.

A sailboat runs before the wind with a constant speed of 3.5 m/s in a direction 28 ∘ north of west. You may want to review (Pages 89 - 92) .

How far west has the sailboat traveled in 22 min?

How far north has the sailboat traveled in 22 min?

The Bipolar Junction Transistor (BTJ) characteristic Curve experiment source of error

A child on a sled starts from rest at the top of a 20.0° slope.

1)

Assuming that there are no forces resisting the sled’s motion, how long will the child take to reach the bottom of the slope, 250 m from the top? (Express your answer to two significant figures.)

the nuclear shell model, orbitals are filled in the order 1s1/2,1p3/2,1p1/2,1d5/2,2s1/2,1d3/2, etc.
(a) What is responsible for the splitting between the p3/2 and p1/2 orbitals?
(b) In the model, 16O (Z = 8) is a good closed-shell nucleus and has spin and parity Jπ = 0+ . What are the predicted Jπ values for 15O and 17O?
(c) For odd-odd nuclei a range of Jπ values is allowed. What are the allowed values for 18F (Z = 9)?
(d) For even-even nuclei (e.g. for 18O) Jπ is always 0+ . How is this observation explained?

Using Faraday’s Law and Lenz’s Law, explain why a change of current in a conducting wire loop will induce an electrical potential difference which will oppose this change. Use relevant equations and/or diagram(s).

You are about to shoot a shell with an artillery. You must decide which targets you can hit. Your muzzle velocity is 980 m/s and your shell is aerodynamic enough to ignore the drag.

1. What is the maximum range if you are attempting to hit a target at the same elevation as you?
2. What is the maximum range if you are attempting to hit a target that is 50 m below in elevation as you?
3. What was the flight time for part b?
4. Suppose your shell was to explode at the peak of its trajectory and break into two pieces. The first 1 kg is thrown with a speed of 400 m/s at an angle of 225 degrees from the forward direction (45 degrees into the third quadrant). What is the direction and the speed of the second piece if it has mass of 2 kg?

3. Electric power is transferred at very high voltages over long distances. Transmission of high voltage
Explain how it reduces power loss on the lines.
4. If two points have the same potential, this test load will be taken from one point to another.
Does it mean that no work will be carried out during the course? This need no force application
shows that it is not? Discuss.

How does the “World’s Simplest Motor” work? Describe the torque due to the magnetic field on the wire loop as it turns. Explain why it is necessary to ensure only one side of the wire is scraped of enamel to make electrical contact. 

A simple pendulum has a mass of 0.550 kg and a length of 2.00 m. It is displaced through an angle of 11.0