1/ At which location below would you most expect to find a year-round desert?

2/ Humid subtropical climates are found principally _____ of continents, roughly between 25° and 40° latitude.

3/ Because of the dry summers of Mediterranean climates, the land only supports growing _____.

4/ The coldest areas in the Northern Hemisphere are found in _____.

Three deer, A, B, and C, are grazing in a field. Deer B is located 61.6 m from deer A at an angle of 52.2 ° north of west. Deer C is located 79.4 ° north of east relative to deer A. The distance between deer B and C is 91.4 m. What is the distance between deer A and C? (Hint: Consider the laws of sines and cosines given in Appendix E.)

A disk of radius 2.6 cm has a surface charge density of 6.0 µC/m2 on its upper face. What is the magnitude of the electric field produced by the disk at a point on its central axis at distance z = 18 cm from the disk?

(a) You pull a solid zinc ball with a density of 7.14 g/cm³ and a radius of 1.10 cm upward through a fluid at a constant speed of 7.00 cm/s. The fluid exerts a drag force that is directly proportional to speed, and the proportionality constant is 0.950 kg/s. What is the magnitude of the force (in N) you exert on the ball? (You may ignore the buoyant force.)

________N

(b)

What If? By what percentage would the upward force exerted on the zinc ball have to be increased for the speed of the ball in the fluid to increase to double its original value?

________%

A father racing his son has 1/ 4 the kinetic energy of the son, who has 1/ 3 the mass of the father. The father speeds up by 1.4 m/s and then has the same kinetic energy as the son. What are the original speeds of (a) the father and (b) the son?

Chapter 2
Question 5: The position of an object moving along an x axis is given by, where x is in meters and t is in seconds. Find the position of the object at the following values of t: (a) 1 s, (b) 2 s, (c) 3 s, and (d) 4 s. (e) What is the object’s displacement between and s? (f) What is its average velocity for the time interval from s to s?
Question 6: A pickup vehicle is moving with a speed of 15.00 m/s on a straight road. A scooterist wishes to overtake the pickup vehicle in 150.0s. If the pickup vehicle is at an initial distance of 1.500 km from the scooterist, with what constant speed should the scooterist chase the pickup vehicle?
Question 7: A stone is thrown from the top of a building with an initial velocity of 20 m/s downward. The top of the building is 60 m above the ground. How much time elapses between the instant of release and the instant of impact with the ground?
Question 8: Raindrops fall 1800 m from a cloud to the ground. (a) If they were not slowed by air resistance, how fast would the drops be moving when they struck the ground? (b) Would it be safe to walk outside during a rainstorm?
Question 9: Rachel walks on a straight road from her home to a gymnasium 2.80 km away with a speed of 6.00 km/h. As soon as she reaches the gymnasium, she immediately turns and walks back home with a speed of 7.70 km/h, as she finds the gymnasium closed. What are the (a) magnitude of average velocity and (b) average speed of Rachel over the interval 0.00-35.0 min?
Question 10: A car m
oves uphill at 35 km/h and then back downhill at 60 km/h. What is the average speed for the round trip?
Question 11: The displacement of a particle moving along an x-axis is given by , where x is in meters and t is in seconds. Calculate (a) the instantaneous velocity at and (b) the average velocity between and .

Black holes

Q: what is escape speed?

Q: what is a black hole? Size? What is the event horizon?

Q: How to “see” black holes if they are black? Evidence for stellar mass black holes? Supermassive black holes?

~Solved

As we will see in Chapter 19, the process of thermal conduction of energy into cylindrical blocks of ice is described by the equation LaTeX: \frac{Q}{\Delta t}=\frac{4\pi d^2\left(T_h-T_c\right)}{4L} Q Δ t = 4 π d 2 ( T h − T c ) 4 L For experimental control, in one set of trials all quantities except LaTeX: d d and LaTeX: \Delta t Δ t are constant. (a) If LaTeX: d d is made three times larger, does the equation predict that LaTeX: \Delta t Δ t will get larger or get smaller? By what factor? (b) What pattern of proportionality of LaTeX: \Delta t Δ t to LaTeX: d d does the equation predict? (c) To display this proportionality as a straight line on a graph, what quantities should you plot on the horizontal and vertical axes? (d) What expression represents the theoretical slope of this graph?

The value of the equilibrium constant for the electrochemical reaction

MnO₄^–_(aq) + 2H⁺_(aq) + ½Cl_2(g) ⇌Mn²⁺_(aq)+ ClO₃^–_(aq) +H₂O_(aq)

is 5.88 x10^–5. What is the value of the equilibrium constant for the reverse reaction?

100g of ice at 0^oC and 100g of steam at 100^oC are placed in a well-insulated container at atmospheric pressure.

a) How much heat would be required to melt all of the ice and raise the resulting water temperature to 100^oC?

b) How much heat would need to b removed from steam to condense all of it to water?

c) Based on the answers in previous parts, when equilibirum is reached, will the final state be

   i) mixture of ice and water

    ii) mixture of ice and steam

   iii) all water. ?

d) Determine the final equilibrium temperature of the system, and determine each of the masses of ice, water, and/or steam in the final state.

A projectile proton with a speed of 380 m/s collides elastically with a target proton initially at rest. The two protons then move along perpendicular paths, with the projectile path at 41° from the original direction. After the collision, what are the speeds of (a) the target proton and (b) the projectile proton?

Please try to explain it as well as you can thank you