
disadvantages to steel roller coasters

a laser beam (wavelength of 632.8 nm) is incident on two slits 0.2 nm apart. How far apart are the bright interference fringes on a screen 5 m away from the double slits? Thanks!

A sound wave, traveling at 333m/s, is emitted by the foghorn of a tugboat. An echo is heard 1.24 s later. How far away is the reflecting object? Answer in units of m.

Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 2 s. What is your acceleration?

You are driving home from school steadily at 96 for 130 . It then begins to rain and you slow to 65 . You arrive home after driving 2 hours and 20 minutes.

Four point charges each of magnitude 13.46micro coulombs, placed at the corners of a square 61.8 cm on a side. If three of the charges are positive and one is negative, find the magnitude of the forc

A new event has been proposed for the Winter Olympics. An athlete will sprint 100.0 m, starting from rest, then leap onto a 18.5 kg bobsled. The person and bobsled will then slide down a 56.0 m long i

A sound wave traveling at 320 m/s is emitted by the foghorn of a tugboat. An echo is heard 2.70 s later. How far away is the reflecting object?

A hiker shouts toward a vertical cliff 710 m away. The echo is heard 4.00 s later.

When you see a traffic light turn red, you aply the brakes until you come to a stop. Your initial speed was 10 m/s. Assume constant decelleration. Suppose the car comes to rest in 38m. How much time d
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Sample Questions
 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?