How much heat is required to change a 47.2 g ice cube from ice at -11.9°C to steam at 112°C? (if necessary, use c_ice=2090 J/kg°C and c_steam= 2010 J/kg°C)

A 0.415-kg hockey puck, moving east with a speed of 4.75 m/s, has a head-on collision with a 0.830-kg puck initially at rest.

Part A

Assuming a perfectly elastic collision, what will be the speed (magnitude of the velocity) of each object after the collision?

Part B

What will be the direction of the lighter object after the collision.

[ ] West

[ ] East

Part C

What will be the direction of the heavier object after the collision.

[ ] West

[ ] East

Go through the first 20 elements in the chart. Note and record which orbital contains the additional electron. (The various orbitals are given in the upper right area of the Table.) The filling process is fairly straight forward to this point in the Periodic Table, but becomes a little more complex as outer orbitals are filled. Using a Word document you can write the electronic configurations by using the "superscript" function. Click on each element and write electronic configurations for elements number 21 through 36. What happens when going from Vanadium to Chromium? What happens when going from Nickel to Copper?

If you are told an image is virtual and you know it was made by a single optic (either a lens or a mirror), which of the following must be true? Choose all that apply.

The image distance is positive.

The image distance is negative.

The image is inverted.

The image is upright.

The image height is positive.

The image height is negative.

The magnification of the image is positive.

The magnification of the image is negative.

It was made by a converging optic.

It was made by a diverging optic.

The focal length of the optic is positive.

The focal length of the optic is negative.

Ron Swanson is by his fireplace drinking his favorite Lagavulin scotch (the 16 year, of course). He pours 2 ounces (60 ml) of scotch taken from ambient temperature (20°C) and adds 2 cubes of ice, each weighing 1 g that are initially at 0°C. What is the final temperature of the scotch after the ice has melted and equilibrium has been reached? Include a heat diagram in your solution. Density of scotch = 950 kg/m3 Specific heat capacity: scotch 2000 J/(kg°C); water 4186 J/(kg°C) Latent heat of fusion for ice/water: 3.33 x 105 J/kg Important Note: you do NOT need to convert to K. If you use °C, the answer you will get will be in °C; if you convert to K, the answer you will get will be in K.

In the rainy season, the Amazon flows fast and runs deep. In one location, the river is 25 m deep and moves at a speed of 4.5 m/stoward the east. The earth's 50 μT magnetic field is parallel to the ground and directed northward.

If the bottom of the river is at 0 V, what is the potential (magnitude and sign) at the surface?

Suppose a particular simple pendulum of length l_0 has a period of T_0 for small oscillations here on Earth.

(a) Suppose the original pendulum is set up with the same length l_0 on the surface of a new planet, Uzaz, and it oscillates with a period 5/4 as long as the period of Earth. Given the gravitational acceleration here on Earth is 9.8 m/s^2, what is the gravitational acceleration (g)(v) at the surface on Uzaz?

(b) If the radius of Uzaz is known to be 3.5x10^6 m, what must be the mass of Uzaz?

(c) Suppose Uzaz rotates once every 18.5 hours. At what altitude above the surface of Uzaz must a satellite orbit in order to maintain synchronicity with a point on the surface of Uzaz?

(d) Suppose your spaceship (8x10^5 N) enters into elliptical orbit around Uzaz. At perihelion, your ship is (9x10^6 m) from Uzaz, and aphelion it is (1.6x10^7 m) from Uzaz.

Find the following for part (d):

i. the semimajor axis of your ship's orbit.

ii. the eccentricity of your ship's orbit.

iii. the speed of your ship at perihelion and aphelion.

iv. the period of your ship's orbit.

What occurs to a massive stellar core when it begins fusing iron into heavier elements. Make sure to discuss energy released or absorbed by the reactions.

The largest tendon in the body, the Achilles tendon, connects the calf muscle to the heel bone of the foot. This tendon is typically 17.0 cm lont 6.00 mm in diameter, and has a Young's modulus of 1.35×109 Pa. If an athlete has stretched the tendon to a length of 17.9 cm, what is the tension ?, in newtons, in the tendon?

T=___________________N

An 85.4-kg climber is scaling the vertical wall of a mountain. His safety rope is made of nylon that, when stretched, behaves like a spring with a spring constant of 1.19 103 N/m. He accidentally slips and falls freely for 0.815 m before the rope runs out of slack. How much is the rope stretched when it breaks his fall and momentarily brings him to rest?

What occurs to a massive stellar core when it begins fusing iron into heavier elements. Make sure to discuss energy released or absorbed by the reactions.

A 100-W incandescent light bulb has a cylindrical tungsten filament 26.0 cm long, 0.35 mm in diameter, and with an emissivity of 0.28.

(A) What is the temperature of the filament?

(B) For what wavelength does the spectral emittance of the bulb peak?

(C) Incandescent light bulbs are not very efficient sources of visible light. Explain why this is so.

A 2690-kg spacecraft is in a circular orbit 2320 km above the surface of Mars.

How much work must the spacecraft engines perform to move the spacecraft to a circular orbit that is 4730 km above the surface?

Explain Magnetic Resonance Imaging.What is the fundamental physics concepts behind Magnetic Resonance Imaging? How does it work?

1. Find the electric field magnitude midway through the nonconducting wall of a thick-walled pipe of infinite length with inner radius w, outer radius 3w, and a uniform volumetric charge density ρ. Answer in terms of the permittivity.

2. Find the electric field strength due to two completely hollow, concentric spherical shells made of metal. The inner shell has a radius w and carries a uniform surface charge density -σ. The outer has radius 2w and uniform charge density +4σ. Answer in terms of epsilon, and find the result first at a distance r from the center (w<r<2w) and then at r' from the center (r'>2w). You may find the answers interesting.