A 1.0 kg glass bowl at 37 C is placed in a freezer. How much heat will the freezer have to remove from the bowl to take it to 0 C? (cglass = 0.2 cal/deg-gm)
How much heat must be removed from 500 g of water at 0 C to form ice at 0 C?
How much heat is necessary to vaporize 100 g of water at 100 C to form steam at 100 C?
How much heat must be added to 1.0 kg of iron to raise its temperature from 30 C to 75 C? (ciron = 0.11 cal/deg-gm)
"A cylinder with moment of inertia 29.8 kgm2 rotates with angular velocity 2.51 rad/s on a frictionless vertical axle. A second cylinder, with moment of inertia 36.9 kgm2, initially not rotating,
11. A 0.302 kg puck, initially at rest on a horizon- tal, frictionless surface, is struck by a 0.177 kg puck moving initially along the x axis with a speed of 2.38 m/s. After the collision, the 0
A machine part rotates at an angular speed of 0.6 rad/s; its speed is then increased to 1.66 rad/s using an angular acceleration of 0.91 rad/s2. Find the angle through which the part ro- tates be
In the vertical jump, a Kobe Bryant starts from a crouch and jumps upward to reach as high as possible. Even the best athletes spend little more than 1.00s in the air (their "hang time"). Treat Kobe a
ronman steps from the top of a tall building. He falls freely from rest to the ground a distance of h. He falls a distance of h/ 3 in the last interval of time of 1.2 s of his fall. Hint: Firs
When a .22-caliber rifle is fired, the expanding gas from the burning gunpowder creates a pressure behind the bullet. This pressure causes the force that pushes the bullet through the barrel. The barr
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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