A 51 g sample of copper is at 26 C. If 539 J of energy are added to the copper, what is its final temperature? Assume the specific heat of copper is 387 J/kg C. Answer in units of C.
A roller coaster (310. kg) moves from A (5.00 m above the ground) to B (19.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long climb. What is the change in the...
a 1.0 metal head of a geology hammer strikes a solid rock with a velocity of 5.0 m/s. Assuming all the energy is retained by the hammer head, how much will its temperature increase? (Chead=0.11 kcal/kg degrees C) 1/2 m v^2 = mc Deltatemp solve for deltaTemp.
Convert the complex wavefunction r*exp(-r/2)*sin(tth)*exp((+/-)i*phi) to a real wave function
If a metric ton is 1.000 103 kg, how many 76 kg people can safely occupy an elevator that can hold a maximum mass of exactly 1 metric ton?
n this sociologist's hierarchy of sciences, sociology was the "queen" and its practitioners "scientist-priests."
A ship sets out to sail to a point 120 km due north. An unexpected storm blows the ship to a point 131 km due east of its starting point. (a) How far (in km) and (b) in what direction (as an angle from due east, where north of east is a positive angle) must it now sail to reach its original...
A 54.0-kg projectile is fired at an angle of 30.0 above the horizontal with an initial speed of 116 m/s from the top of a cliff 149 m above level ground, where the ground is taken to be y = 0.
After falling from rest from a height of 35 m, a 0.45 kg ball rebounds upward, reaching a height of 25 m. If the contact between ball and ground lasted 1.8 ms, what average force was exerted on the ball?
A horse races once around a circular track in a time of 18.0 s, with a speed of 18.0 m/s. What is the radius of the track? Give your answer in meters, but do not include units.
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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