When preparing to undergo an MRI scan, why are patients advised to remove eyeglasses, watches, jewelry, and other metal objects
A laser beam is incident on a 36 -54 -90 prism perpendicular to one of its faces, as shown in the figure below. The transmitted beam that exits the hypotenuse of the prism makes an angle of 9 with the direction of the incident beam. Find the index of refraction of the prism. (Use the...
An intergalactic rock star bangs his drum every 1.10 s. A person on earth measures that the time between beats is 2.50 s. How fast is the rock star moving relative to the earth? Any help would be greatly appreciated.
Does blue light or orange light have a larger index of refraction? Blue light is bent more by a prism than orange light. Does blue light or orange light have a larger index of refraction in glass? A. Blue B. Orange If you know the answer to this, could you also explain why? Looking at a...
170 students in a lecture hall can scream at 120 dB. Thus, we should expect that 340 average students can do 130 dB. an average student can do 0.71 dB by him or herself. the loudest student in the class can do 120 dB. 17 average students can do 110 dB. 85 average students can do 110...
A thin film of acetone (n = 1.25) coats a thick glass plate (n=1.50). While light is incident normal to the film. In the reflections, fully destructive interference occurs at 600 nm and fully constructive interference at 750 nm. Calculate the thickness of the acetone film. (m) (Hint: m values for...
A hammer taps on the end of a 3.80-m-long metal bar at room temperature. A microphone at the other end of the bar picks up two pulses of sound, one that travels through the metal and one that travels through the air. The pulses are separated in time by 11.0
If the string is 9.5 m long, has a mass of 39 g, and is pulled taut with a tension of 7.7 N, how much time does it take for a wave to travel from one end of the string to the other?
To change mercury into gold you need to do which of the following
A flashlight on the bottom of a 4.35 m deep swimming pool sends a ray upward and at an angle so that the ray strikes the surface of the water 2.50 m from the point directly above the flashlight. What angle (in air) does the emerging ray make with the water's surface?
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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