Author: Anonymous

What happens with a block of wood with the density dwood = 700 kg/m3 after it is dropped in a pool of water and reaches equilibrium (stops)? dwater = 1000 kg/m3

Find the heat needed when temperature of a 0.25 kg piece of gold is changing from 10 ºC to 90 ºC (specific heat for gold is s gold= 129 J/kg·ºC).

A 50 kg woman runs up a staircase 5m high in 20s. The work done is ___A___. The power developed in this process is ___B___. Use acceleration due to gravity g = 10 m/s2.

A boy in a roller coaster with mass of 60 Kg is moving with 20 m/s, describing a circular arc with the radius of 30 m. What is the centripetal force acting on the boy?

A centimeter is

In a ventrodorsal view of the abdomen, you should see that:

Match the letters below with the correct choice on the right. Selections on the right may be used once, more than once, or not at all. A soccer ball is dropped in a vacuum chamber. Describe the motion and show how the energy is transforming from a form to the other. Total energy is the sum of kinetic and ___A___ energy. Kinetic energy is the energy of a moving object and it depends on the object’s mass and its ___B___. Potential energy is the energy of position and the gravitational potential energy depends on the ___C___ above its original position. Because the motion of the ball takes place in a vacuum chamber the total energy is ___D___ (no friction). The total energy transforms from one form to the other. When the ball is released from the top of the chamber at rest all its energy is ___E___. As the ball falls, height decreases and the speed increases. At the end of the chamber (just before hitting the bottom) all its energy is ___F___.

Rules of use for the dosimeter:

An annular eclipse of the sun occurs when the

Intensifying screens: