Physics Force & Laws Of Motion Level: University
Under GravityMartha ( a very fast cyclist) is riding her bike zalong horizontal road when she unknowingly comes to a complete drop off ( or cliff) at the end of the road. By remaining completely composed she lands perfectly on another level road exactly 121 m ahead and 18 m below and then continues on her way ( you may igore air resistance).
(a) Determine Martha s launce velocity along the original road ( upon encountering the cliff).
(b) Determine Martha s total flight time.
(c) Determine the velocity of Martha and her bike when she is exactly 12.5m below the original road.
Physics Force & Laws Of Motion Level: University
Motion Under GravityA cat drops from a tree limb to the ground in a perfect vacuum and is observed to reach the ground in 24.2 seconds. Upon impact the cat comes to rest without bouncing in 123 seconds.
a. Determine the velocity of the cat just prior to impact w/the ground.
b. Determine the height of the limb.
c. Determine the average acceleration of the cat during the impact (or collison
d. Using your result from part C, determine the average jerk experienced by the cat during the collision with the ground.
Physics Force & Laws Of Motion Level: University
Motion Under GravityA cat drops from a tree limb to the ground in a perfect vacuum and is observed to reach the ground in 24.2 seconds. Upon impact the cat comes to rest without bouncing in 123 seconds.
a. Determine the velocity of the cat just prior to impact w/the ground.
b. Determine the height of the limb.
c. Determine the average acceleration of the cat during the impact (or collison dd).
d. Using your result from part C, determine the average jerk experienced by the cat during the collision with the ground.
Physics Misc Topic Level: University
The light intensity for human beings to comfortably read a page is 1 Watt/ Meeter^2. The intensity of sunlight striking the earth is 1500 Watts/meter^2. As you travel in the solar system towards the outer planets the solar intensity diminishes. Given the radii of the orbits of the planets below calculate the intensity of light on the planet and find what the furthest planet that could be traveled to and still have enough light to read by.Earth 1.5
Mars 2.3
Jupiter 7.7
Saturn 14
Uranus 28
Neptune 45
Pluto 59
Physics Waves And Oscillations Level: University
SoundYou are a conductor performing a piece of music with a tuba (f = 40Hz) and a french horn ( f = 1000Hz that are both playing equally loud and both can be heard by the audience equally well. The sound level is about 100db. Now you come to a very quiet part of the music ( sound level is 20dB) but you still want to have the audience hear both instruments equally well. Which instrument do you tell to play more quietly than the other and why? Also approximately what must the ratio of intensities of the two instruments be for equal sound to be heard by the audience?
Physics Misc Topic Level: University
A loop is placed near a long straight wire. The loop carries a current a current of 2A and the wire carries a current of 10A. The radius of the loop is 0.1m. What distances must the edge of the loop be from the wire such that the magnetic field at the center of the loop be from the wires such that the magnetic field at the center of the loop be zero? In which direction ( clockwise or counter) must the current in the loop be traveling?
Physics Magnetism,Magnetic Effects Of Current Level: Middle School
Four long aires are located at the corners of a square 20 cm on a side. Each carries a current of 4A in the directions shown in the diagram below . Find the magnitude of the net magnetic field at the center of the square.Question Diagram
Physics Magnetism,Magnetic Effects Of Current Level: University
Four long wires in the figure carry 2.5A current in the directions indicated. Find the net force per unit length on the wire at the lower left. All sides are 15 cm in length.
Question Diagram
Physics Misc Topic Level: University
Force on current carring wireIn a high magnetic field experiment a conducting bar carrying a 75 kA passes through a 30 cm long region containing a 22 T magnetic field. If the bar makes a 60 degree angle with the field direction what force is necessary to hold it in its place.
Physics Magnetism,Magnetic Effects Of Current Level: University
Three circular loops of wires of radius R 2R 3R respectively are made into concentric circles. A clockwise current of 3A exists in the innermost and outermost loops. Determine the magnitude and direction in the middle loop if the net field at the center is zero.
Physics Magnetism,Magnetic Effects Of Current Level: University
SolenoidYou have a spool of thin wire that can handle a maximum current of 0.5A. If you could wind the wire into a loop- like coil 20cm in diameter how many turns should the coil have if the magnetic field at its center is to be 2.3 mT at the maximum current.
Physics Magnetism,Magnetic Effects Of Current Level: University
Three particles have identical charges and masses. They enter a constant magnetic field and follow the paths shown in he diagram. Which particle is magnetic field and follow the paths shown in thediagram. Which particle is moving the fastest and which is moving the slowest. Justify your answers.Question Diagram
Physics Magnetism,Magnetic Effects Of Current Level: University
Charge Moving in Magnetic FieldIn a certain reion the average radius of curvature of the trajectory of electrons in the Van Allen belt is 300m and the average electron energy is 100keV. What is the value of the earths magnetic field in this region?
Physics Properties Of Matter Level: University
Fluid MachanicsThe large beaker in the picture is set up so that the water displaced by the submerging weight overflows into the small beaker.
When would scale (a) again read 10N?
a. B only
b. E only
c. C only
d. D only
e. All of the above
Question Diagram
Physics Properties Of Matter Level: University
Liquid an MotionWhat must be the pressure difference between the ends of a 1.0cm diameter 30 meter long hose if it is to deliver 0.10 liter of water per second? ( Viscosity 0.0072 Ns/m specific gravity 1.00)
a. 0.87 atm
b. 5.2 atm
c. 11 atm
d. 2.1 atm
