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Please explain the following:
1. How is a radioactive material different from a material that is not radioactive? What is radioactive decay?
2. Describe how the radioactive decay rate can be changed if this is possible. Describe three kinds of radiation emitted by radioactive materials.
3. Describe what eventually happens to each kind of radiation after it is emitted.
4. How are positively charged protons able to stay together in a nucleus since like charges repel?
5. What is a half-life?
6. Would you expect an isotope with a long half-life to be more, the same, or less radioactive than an isotope with a short half-life? Explain.
7. Compare and contrast nuclear fission and nuclear fusion.
How fast would javelin (normally 2.5 m long) have to be going (relative to an observer) to appear 20% shorter? (2 m long)
A weather balloon filled with helium gas has a volume of285 m3 and pressure 1.4 x 105 Pa at the Earth's surface (where thetemperature is 293 K). What is the new volume ofthe balloon
A uniform slender rod of length l and mass m rotates about a vertical axis AA' with a constant angular velocity V. Determine the tension in the rod at a distance x from the axis of rotation
Draw a sketch showing the coordinate system you will use and the direction of E vector. Clearly indicate the charge element dq that you will use for the integration in your sketch.
A 0.1 kg block is attached to a spring with a constant 2.5 N/m and oscillates on a frictionless table. Its velocity is 0.2m/s when x=0.05. What is the amplitude of oscillations? What is the ball's maximum acceleration?
A gas sample undergoes the cyclic process ABCA shown in the figure (Figure 1), where AB lies on an isotherm. The pressure at point A is 68kPa. Discover the pressure at B. Determine find the net work done on the gas.
A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 24.2° with respect to the horizontal. Find the magnitude of the force that the tow bar exerts
An explosion of a 10.0-kg bomb releases only two separate pieces the bomb was initially at rest and a 4.00-kg piece travels westward at 100 m/s immediately after the explosion
A 12.3-kg monkey is hanging by one arm from a branch and swinging on a vertical circle. compute the magnitude of the tension in the monkey's arm
A projectile is fired straight upward from Earth's surface with a speed that is 0.816 times the escape speed. what is the highest altitude reached measured from the surface of the Earth
A container with rigid well-insulated walls is divided into two parts by a partition. One part contains a gas, and the other is evacuated.- If the partition suddenly breaks, show that the initial and final internal energies of the gas are equal.
a boat moves through the water with two forces acting on it. one is a 1700-n forward push by the water on the propeller
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