
A large, simple pendulum is on display in the lobby of the United Nations building. If the pendulum is 14.9 m in length, what is the least amount of time it takes for the bob to swing from a position of maximum displacement to the equilibrium position of the pendulum? (Assume that the...

110 kW (1.1 multiplied by 105 W) of power is delivered to the other side of a city by a pair of power lines between which the voltage is 12000 V. (a) What current flows in the lines? 1Your answer is correct. A (b) Each of the two lines has a resistance of 10 ohms. What is the voltage change...

A 1.6 kg disk with radius 0.63 m is rotating freely at 55 rad/s around an axis perpendicular to its center. A second disk that is not rotating is dropped onto the first disk so that their centers align, and they stick together. The mass of the second disk is 0.45 kg and its radius is 0.38 m. What...

The cylindrical space station in the figure below, 200 in diameter, rotates in order to provide artificial gravity of 4.0 for the occupants. How much time does the station take to complete one rotation?

A slingshot fires a pebble from the top of a building at a speed of 19.0 m/s. The building is 37.0 m tall. Ignoring air resistance, find the speed with which the pebble strikes the ground when the pebble is fired (a) horizontally, (b) vertically straight up, and (c) vertically straight down.

2. Consider a particle with mass m and energy E in one dimension, with a potential defined by V x ={ 0 V o 0 x 0 0 x a x a (a) (5 marks) Sketch, as a function of x, a wavefunction you would expect for the case E 0 . (b) (10 marks) Consider particles scattering from...

question 3 and 4 of this paper

A 0.20kg object is attached to a spring with spring constant k=10N/m and moves with simple harmonic motion over a horizontal frictionless surface. At the instant that it is displaced from equilibrium by 0.050m, what is its acceleration?

You ski straight down a 41.4 slope, starting from rest and traveling a distance of 11.5 m along the slope. Find your final velocity, assuming negligible air resistance and friction. 1 Read the eBook Section 7.2 Gravitational Potential Energy; Constant Gravitational Force .... 2....

A car traveling at 30 m/s runs out of gas while traveling up a 5.0 degree slope. How far will it coast before starting to roll back down?
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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?