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The star-forming portion of our Galaxy consists of a highly flattened circular disk about 30 (30,000 ) in diameter. Interstellar extinction limits our view to within a radius of about 5 kpc of the S
1) Assuming block two does not move relative to the table and block one is rotating around the table, what is the magnitude of the velocity of the block one in m/s? 2)How much time in seconds does i
Assume all temperatures to be exact, and neglect significant figures for small changes in dimension. On a warm day (88 F), an air-filled balloon occupies a volume of 0.300m^3 and has a pressure of 2
Imagine that you have a 100 W incandescent light bulb (shame on you!), and it is shining uniformly into 4 steradians (outward equally in all directions). Please estimate for me (without a calculator
what is the volume of the air in the container? (Assume that the air behaves as an ideal gas.) answer in m3
Assume that this electric field is produced by a single, point charge. (a) Find the location of the point charge. (b) Find the sign and magnitude of its charge.
A capacitor is formed from a hollow copper sphere of inner radius 44.5 cm and outer radius 55.6 cm. Calculate the capacitance of the sphere in microfarads.
A rod of length L0 moves iwth a speed v along the horizontal direction. The rod makes an angle of (theta)0 with respect to the x' axis (a) show that the length of the rod as measured by a stationary
(a) What is the value of time constant ?? (b) How much energy has been "lost" during these four oscillations?
A 70.1 kg student is riding a looping roller coaster. At the top of the loop the student is moving with a speed of 17.5 m/s. The loop has radius of 20.1 m at the top. Find the normal force from the
A Young's interference experiment is performed with monochromatic light. The separation between the slits is 0.500 mm, and the interference pattern on a screen 2.80 m away shows the first side maxim
Find the net electric field (magnitude and direction) at x = 0 cm. (Use the sign of your answer to indicate the direction along the x-axis.)
A surface completely surrounds a +3.9 10-6 C charge. Find the electric flux through this surface when the surface is a sphere with a radius of 0.30 m, a sphere with a radius of 0.15 m, and a cube wi
The ball is in equilibrium, with the thread making an angle of 30.0° with respect to the vertical. The area of each plate is 0.0157 m2. What is the magnitude of the charge on each plate?
Now it is found that the objects repel one another with a force whose magnitude is equal to that of the initial attractive force. What is the initial charge on each object? (Note: there are two poss
There is a uniform magnetic field of 0.100 T directed vertically upward. A metal bar of mass 0.10 g is sliding down the metal rods. What is the maximum speed of the bar? Assume: no frictional loss a
Find the angle (theta) adn the energies of the two gamma rays. (HInt: Gamma rays are electromagnetic radiation with E=pc)
by means of an external heat reservoir at 600 K. In the second case the temperature at the boundary is taken to be the gas temperature throughout the process. Determine the following:
A 60.0-g object is attached to a horizontal spring with a force constant of 5.0 N/m and released from rest with an amplitude of 20.0 cm. What is the velocity of the object when it is halfway to the
Why are plots made of current versus voltage? Wouldn't it make more sense to have the axes reversed so that the slope would be in ohms?
A particle moves so that its position (in meters) as a function of time (in seconds) is r = i+ 2t^2j + 4t k . (Use the following as necessary: t.) (a) Write an expression for its velocity as a funct
A wave on a string is described by D(x,t)=(3.2cm) *sin[2pi(x/7.2cm)+t/(0.14s)+1)], where x is in m and t is in s . A) What is the wave speed? Express your answer using two significant figures. (in m/s
Calculate the horizontal distance the ball would travel if the same spring were aimed 26.0o from the horizontal.