Styrofoam has a density of 32kg/m^3. What is the maximum mass that can hang without sinking from a 70-cm diameter Styrofoam sphere in water? Assume the volume of the mass is negligible compared to that of the sphere. Express your answer to two significant figures and include the appropriate units.

A laser beam with vacuum wavelength 582 nm is incident from air onto a block of Lucite as shown in the figure below. The line of sight of the photograph is perpendicular to the plane in which the light moves. Take θ1 to be 60°. Recall that the index of refraction of air is 1 and Lucite is 1.50. (a) Find the speed of the light in Lucite.. m/s (b) Find the frequency of the light in Lucite.. Hz (c) Find the wavelength of the light in Lucite. nm

Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of -0.2532 N when separated by 50 cm, center-to-center. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres repel each other with an electrostatic force of 0.2525 N. What were the initial charges on the spheres? Since one is negative and you cannot tell which is positive or negative, there are two solutions. Take the absolute value of the charges and enter the smaller value here. Enter the larger value here.

Water drips from the nozzle of a shower onto the floor 200 cm below. The drops fall at regular (equal) intervals of time, the first drop striking the floor at the instant the fourth drop begins to fall. Find the locations (above the floor in cm) of the second and third drops when the first strikes the floor. Second drop? Third drop?

A ball is dropped from 2.00 and rebounds to a height of 1.75m. What is the maximum height it will achieve after bouncing 7 more times?

berdine has developed cataracts in both eyes preventing her from being able to identify een her mothers face, berdine most clearly suffers a deficiency in A)perceotual set b)sensory adaptation c)bottom-up processing

A neon atom (m=20.0u) makes a perfectly elastic collision with another atom at rest. After the impact, the neon atom travels away at a 40.0 ? angle from its original direction and the unknown atom travels away at a -50.0 ? angle.

Part A

What is the mass (in u) of the unknown atom? [Hint: You can use the law of sines.]

The average coefficient of volume expansion for carbon tetrachloride is 5.81 ? 10-4 (°C)-1. If a 40.5 gal steel container is filled completely with carbon tetrachloride when the temperature is 10.0°C, how much will spill over when the temperature rises to 33.5°C?

High-altitude mountain climbers do not eat snow, but always melt it first with a stove. To see why, calculate the energy absorbed from a climber's body under the following conditions. The specific heat of ice is 2100 J/kg?C?, the latent heat of fusion is 333 kJ/kg, the specific heat of water is 4186 J/kg?C?.

A) Calculate the energy absorbed from a climber's body if he eats 0.45 kg of -15?C snow which his body warms to body temperature of 37?C. Express your answer to two significant figures and include the appropriate units.

B) Calculate the energy absorbed from a climber's body if he melts 0.45 kg of -15?C snow using a stove and drink the resulting 0.45 kg of water at 2?C, which his body has to warm to 37?C. Express your answer to two significant figures and include the appropriate units.

?V.I. Arnold Mathematical Methods of Classical Mechanics Second Edition Page 50?

Determine the major semi-axis of the ellipse which the center of the earth describes around the common center of mass of the earth and the moon. Where is this center of mass, inside the earth or outside? (The mass of the moon is 1/81 times the mass of the earth.)

NOT JUST 'INSIDE' OR 'OUTSIDE', with specific solution.

If the cross-sectional area of the manometer is 10 cm² and the amount of water added is 50 ml, what will be the height difference between the two arms of the manometer?

How do the following types of radiation interact with matter?

a) radio waves

b) microwaves

c) infared

d) visible light

e) ultraviolet, x-rays and gamma rays

-

a) How do wavelength and frequency change as you move through the EMR spectrum?

b) What is special about the visible range of the EMR spectrum?

(Please type your responses and be succinct.)

Use the quantum particle wavefunctions for the kinetic energy levels in a one
dimensional box to qualitatively demonstrate that the classical probability distribution
(any value of x is equally allowed) is obtained for particles at high temperatures.

A box of physics books slides down a ramp inclined at an angle of 40 degrees to the horizontal. The total length of the ramp is 10m. The coefficient of kinetic friction between the box and the ramp is .2 for the top 8m and zero for the bottom 2m. Upon reaching the bottom of the ramp, a spring bounces the box back upward.

(a) Find the distance that the box travels back up the ramp on the return bounce.

(b) Your answer shouldnt depend on the spring constant of the spring at the bottom. Why not?