A 2.00kg block hangs from a rubber cord, being supported so that the cord is not stretched. The unstretched length of the cord is 0.500m and it's mass is 5.00g.The "spring constant" for the cord is 100N/m. Block is released and stops at lowest point. a) determine the...
An electron has a de Broglie wavelenght equal to the diameter of the Hydrogen atom. What is the kinetic energy of the electron? How does this energy compare to the ground state of the hydrogen atom?
10. An object is being pulled up a 15 incline against a frictional coefficient of 0.15, and requires a force of 835 N parallel to the surface of the ramp to move it at a constant speed. What is the weight of the object?
A car and a train move together along straight, parallel paths with the same constant cruising speed v(initial). At t=0 the car driver notices a red light ahead and slows down with constant acceleration -a(initial). Just as the car comes to a full stop, the light immediately turns green, and the...
A baby bounces up and down in her crib. Her mass is 12.0 kg, and the crib mattress can be modeled as a light spring with force constant 680 N/m. (a) The baby soon learns to bounce with maximum amplitude and minimum effort by bending her knees at what frequency? Enter a number.1 Hz (b) If...
calculate the heat of vaporisation water at 85 degree
A thin uniform rod of length L and mass M is bent into a circular hoop. Which one of the following describes the rotational inertia of this hoop about an axis through its rim, perpendicular to the plane of the hoop? A. ML^2 B. ML^2/3pi^2 C. ML^2/pi^2 D. ML^2/2pi^2 E. ML^2/4pi^2
A particle of mass m = 7.00 kg is released from point A and slides on the frictionless track shown in the figure below. (ha = 5.30 m.)
a picture hangs on a nail if the tension on each string
A baby bounces up and down in her crib. Her mass is 11.0 kg, and the crib mattress can be modeled as a light spring with force constant 778 N/m. (a) The baby soon learns to bounce with maximum amplitude and minimum effort by bending her knees at what frequency? (b) If she were to use the...
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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