
There is a long hill with a gradient of 1:18 (3.18 degrees to the horizontal) on my way home from the shops. If I allow my car to coast down it, it maintains a constant speed of 55 m.p.h. (A)My car

A traveler first drives 19.4 km east, then 27.6 km southeast, and finally 10.2 km south. Find the traveler's total displacement. What is the magnitude and direction south of east?

A steel wire of length 2.07 m with circular cross section must stretch no more than 0.220 cm when a tensile (stretching) force of 420 N is applied to each end of the wire. What minimum diameter is

17.50 please provide me with explanation thanks

17.52 please provide me with explanation thanks

17.57 please provide me with explanation thanks

Vector A makes an angle of 29.7 above the positive xaxis, and vector B makes an angle of 45.0 below the negative xaxis. A = 3.12 units, and B = 1.92 units. Find A + B and A  B. A + B magnitude

17.64 please provide me with explanation thanks

18.19 please provide me with explanation thanks

18.22 please provide me with explanation thanks
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 The Earth’s rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2000 the Earth takes about 0.548 s longer to complete 365 revolutions than it did in the year 1900.
 (a) What is the average angular acceleration of the Earth?
 (b) If this average acceleration remains constant, in what year will the Earths rotation come to rest?
1. Can you show me step by step how to solve this problem?:
 A spherical balloon is made from a material whose mass is 3.00kg. The thickness of the material is negligible compared to the 1.5m radius of the balloon. The balloon is filled with helium (He) at a temperature of 305degrees K and just floats in the air, neither rising nor falling. The density of the surrounding air is 1.19kg/m^3. Find the absolute pressure of the helium gas
2. I do not understand this Ideal Gas Law and Kinetic Theory question. Can you help me set it up?