A car travels on a circular track of radius R = 209 m, with increasing speed v = R t. [t = time; = 0.12083 radians per second2.] (A) What is the angular position at t = 30 s (relative to t = 0)
1)A car travels on a straight road. The speed is 60 mph. The direction is northwest. Calculate the eastward component of the displacement vector after 30 minutes of travel time. 2)A cannon shoots a b
A raindrop falls from the roof of a house. It passes two windows along the way: one of height d starting the distance d below the roof and the other of height D starting the distance 3d below the roof
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -68.1uC. How many excess electrons does this person get?
A star of mass 16 10^30 kg is located at 6 10^12, 3 10^12, 0 m. A planet of mass 4 10^24 kg is located at 4 10^12, 8 10^12, 0 m and is moving with a velocity of 0.6 10^4, 1.2 10^4
The coefficient of thermal expansion of a substance (alpha) measures the change in the volume of a substance as temperature is increased under conditions of constant pressure. It is defined by the re
Consider 1.00 mol of argon (Ar), an ideal monatomic gas (CV,m = 12.47 J/mol.K) at an initial temperature and pressure T = 300.0 K and p = 5.00 atm. Find q, w, U, and H for each of the following pro
A skier weighing 90 kg starts from rest down a hill inclined at 17. He skis 100 m down the hill and then coasts for 70 m along level snow until he stops. Find the coei- ficient of kinetic friction
A block of mass m = 1.3 kg slides down a frictionless track, as shown in Figure 2-A (page 94). The block is released at height h = 3.7 m. The radius of curvature of the track at the bottom is R = 1 m.
Why did (i) the increase in the distance a photon could travel before being deflected by a free electron and (ii) recombination of protons and electrons to form neutral hydrogen about 40
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1. Can you show me step by step how to solve this problem?:
- 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?
2. I do not understand this Ideal Gas Law and Kinetic Theory question. Can you help me set it up?
- A spherical balloon is made from a material whose mass is 3.00-kg. The thickness of the material is negligible compared to the 1.5-m radius of the balloon. The balloon is filled with helium (He) at a temperature of 305-degrees K and just floats in the air, neither rising nor falling. The density of the surrounding air is 1.19-kg/m^3. Find the absolute pressure of the helium gas