The coefficient of kinetic friction between the 2.0 kg block in figure and the table is 0.290.

a)What is the acceleration of the 2.0 kg block?

The mean distance between the Earth and the Sun is 1.50

Two manned satellites approaching one another at a relative speed of 0.300 m/s intend to dock. The first has a mass of 4.00 ✕ 10³ kg, and the second a mass of 7.50 ✕ 10³ kg. Assume that the positive direction is directed from the second satellite towards the first satellite.

(a) Calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.
??????m/s

(b) What is the loss of kinetic energy in this inelastic collision?
??????J

(c) Repeat both parts, in the frame of reference in which the second satellite was originally at rest.
final velocity
??????m/s
loss of kinetic energy
??????J

Define the following terms using a sentence (or two in the case of two terms):

e. Momentum relaxation time

f. Carrier lifetime

g. Average drift velocity

h. Scattering (Ionized impurity and lattice)

i. Recombination level

j. Diffusion

k. Diffusion coefficient

l. Diffusion length

m. Einstein relation

You plan to project an inverted image 30.0 cm to the right of an object. You have a diverging lens with focal length -4.00 cm located 5.10 cm to the right of the object. Once you put a second lens at 18.7 cm to the right of the object, you obtain an image in the proper location.

(a) What is the focal length of the second lens?
___cm

(b) Is this lens converging or diverging?

converging,diverging    

(c) What is the total magnification?


(d) If the object is 12.0 cm high, what is the image height?
___cm

a. A relatively rare transition of the hydrogen atom emits a radio photon with with ? = 21 cm. This emission line is extremely important to astronomers for two main reasons: it cuts through most gas and dust without being absorbed and, although transition is rare, there is so much hydrogen in space that the 21 cm photons are themselves quite common. Suppose that one such photon from a distant galaxy is measured to have a wavelength of just 11 cm. How fast is that galaxy receding from us?

b. Assuming that the speed you found in problem a is enitrely due to cosmic expansion, how far away is the galaxy from us?

What is the diameter of Planet X in Earth diameters and in AU? (The diameter of Earth is 1.3 × 10⁷ m.)

A gun is placed on a cliff of height 60 m above ground level, and fires a projectile at an angle of 50 degrees. The muzzle velocity of the projectile is 139 m/s.

What will be the magnitude of the total velocity when it hits the level ground (y=0m).

Round your answer to the nearest tenth of m/s.

A uniform disk with radius 0.310 m and mass 30.0 kg rotates in a horizontal plane on a frictionless vertical axle that passes through the center of the disk. The angle through which the disk has turned varies with time according to ?(t)=( 1.10 rad/s)t+( 6.90 rad/s2 )t2

What is the resultant linear acceleration of a point on the rim of the disk at the instant when the disk has turned through 0.100 rev ?

Airplane travelers sometimes note that their cosmetics bottles and other containers have leaked during a flight. What might cause this? (b) When blood pressure is measured, why must the cuff be held at the level of the heart? (c) Why does buoyancy occur? Is buoyant force a conservative force? Is potential energy associated with it? Explain your answer. (d) Explain how the tube in the figure below, known as a siphon, can transfer liquid from one container to a lower one even though the liquid must flow uphill for part of its journey. (Note that the tube must be filled with water to start with.)

This table below provides approximate values for the intracellular and extracellular concentrations in unit mmol/L for sodium, potassium, and chlorine ions in a frog muscle with a resting potential difference of −98 mV and for the squid axon with a resting potential difference of −70 mV. Calculate the equilibrium potential difference (in mV) for each ion species in both cases at 17°C.

Table:

Frog muscle (intracellular, extracellular)

Na+ = 9-13, 120

K+ = 140, 2.5

Cl- = 3.5, 120

Squid Axon (intracellular, extracellular)

Na+ = 50, 440

K+ = 400, 20

Cl- = 40-100, 560

A 510-turn solenoid has a radius of 8.00 mm and an overall length of 14.0 cm. (a) What is its inductance? (b) If the solenoid is connected in series with a 2.50-?(ohm electrical symbol) resistor and a battery, what is the time constant of the circuit?

Radioactive Half Life of Barium-137m: Are the detected activity and actual activity of the source Identical? What difference would this make in the analysis of the data?

Ask Your Teacher A scale reads 344 N when a piece of nickel is hanging from it. What does it read (in N) when it is lowered so that the nickel is submerged in water Please help solve, I need help with how to calculate. Thank you

In an experiment designed to measure the speed of light, a laser is aimed at a mirror that is 47.5 km due north. A detector is placed 116 m due east of the laser. The mirror is to be aligned so that light from the laser reflects into the detector.

(a) When properly aligned, what angle should the normal to the surface of the mirror make with due south?

(b) Suppose the mirror is misaligned, so that the actual angle between the normal to the surface and due south is too large by 0.005