A block of mass 23 kg is set on top of a 37 degree incline with a hight of 13.5 m. The incline rests on a table that is 27.8 m above the ground on the planet Mercury (M = 3.285 * 10^23 kg, R = 1516 mi). The coefficient of kinetic friction between the block and the incline is 0.18. The gravitational acceleration on Mercury is 3.68 m/s.

How far from the base of the table does the block land?

4. Suppose a newborn panda bear of mass 98.0 kg is exhibiting uniform circular motion while

orbiting a neutron star of mass 1.50*10^21 kg and radius 3.50*10^5 m. The distance that the

bear maintains from the surface of the neutron star is 50:0 km. What is the magnitude of the

baby panda's tangential velocity?

A 80.0 kg ice hockey goalie, originally at rest, catches a 0.150 kg hockey puck slapped at him at a velocity of 18.0 m/s. Suppose the goalie and the ice puck have an elastic collision and the puck is reflected back in the direction from which it came. What would their final velocities (in m/s) be in this case? (Assume the original direction of the ice puck toward the goalie is in the positive direction. Indicate the direction with the sign of your answer.)

An object with mass 0.150 kg is acted on by an elastic restoring force with force constant 11.0 N/m . The object is set into oscillation with an initial potential energy of 0.130 J and an initial kinetic energy of 5.10×10⁻² J .

1. What is the amplitude of oscillation?

2. What is the potential energy when the displacement is one-half the amplitude?

3. At what displacement are the kinetic and potential energies equal?

4. What is the value of the phase angle ϕ if the initial velocity is positive and the initial displacement is negative?

A 82.0 kg worker climbs a cell tower which is 72.0 m tall. The worker brings 208 kg of tools and equipment to the top off the tower. The tower can be modeled as equivalent to a steel cylinder that has a cross sectional area of .022 m^2. By how much did the tower compress when the worker was at the top of the tower. Young's modulus for steel is 20.0 x 10^10 Pa.

A. .0465 mm

B. .0242 mm

C. .0345 mm

D. .0121 mm

In an experiment electrons are released with a kinetic energy of 2.8 eV. The amazing physicists doing the experiments are increasing the wavelength by 50%. Do you remember what happens? Are the photoelectrons faster or slower? The energy now is 0.44 eV.

A) Based on that information, what is the material of the cathode? (calculate the work function and compare to table 28.1 in our textbook).

B) What is the initial wavelength of the light?

C) When you go a few pages back in the textbook you can find out the temperature of a physical object radiating at that wavelength

Fish are hung on a spring scale to determine their mass (most fishermen feel no obligation to report the mass truthfully).

(a) What is the force constant (in N/m) of the spring in such a scale if it stretches 7.90 cm for a 11.0 kg load?

  13645.56 N/m

(b) What is the mass (in kg) of a fish that stretches the spring 5.50 cm?

7,66 kg

(c) How far apart (in mm) are the half-kilogram marks on the scale?

  3.6E-3 mm

Part A and C are wrong and I want details.

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.