1. List the three types of radioactive decay and specifically what particles are released from the nucleus during these decays.

2. Radioactivity exists naturally and is man made. Radioactive particles are used for a variety of purposes in industry and medicine. Provide a list of at least 3 unique uses of radioactivity for the benefit of mankind.

3. Many workers are exposed to radioactivity while on the job. These workers must be monitored and are not allowed to continue to work in certain positions once an exposure amount has been met. What are the three parameters associated with an increase of dose on the worker? How could this dose possibly be minimized?

A -8.50 nC point charge and a +17.0nC point charge are 14.5 cm apart on the x-axis.

a)What is the electric potential at the point on the x-axis where the electric field is zero?

b)What is the magnitude of the electric field at the point on the x-axis, between the charges, where the electric potential is zero?

(1) Which pattern, single-slit or double-slit, gives a more accurate determination of wavelength or do they both give equally accurate values? Defend your answer.

(2) From you superimposed single and double slit patterns, what can you conclude about the influences of the slit width, and the slit separation, or the double slit pattern?

The nucleus of the hydrogen atom has a radius of about
1 x 10^-15 m. The electron is normally at a distance of about 5.3 x 10^-11 m
from the nucleus. Assuming that the hydrogen atom is a sphere with a
radius of 5.3 x 10^-11 m, find (a) the volume of the atom, (b) the
volume of the nucleus, and (c) the percentage of the volume of the
atom that is occupied by the nucleus.The nucleus of the hydrogen atom has a radius of about
1 x 10^-15 m. The electron is normally at a distance of about 5.3 x 10^-11 m
from the nucleus. Assuming that the hydrogen atom is a sphere with a
radius of 5.3 x 10^-11 m, find (a) the volume of the atom, (b) the
volume of the nucleus, and (c) the percentage of the volume of the
atom that is occupied by the nucleus.

On planet Tehar, the free-fall acceleration is the same as that on Earth, but there is also a strong downward electric field that is uniform close to the planet's surface. A 1.86-kg ball having a charge of 5.04 μC is thrown upward at a speed of20.1 m/s. It hits the ground after an interval of 4.10 s. What is the potential difference between the starting point and the top point of the trajectory? (Use 9.8 m/s² for the acceleration due to gravity.)

Using a pair of positive and negative test charges describe how you could determine the
charge on an object dangling from a rope. That is, outline a procedure to test the charge,
describe possible outcomes of your procedure and state the conclusions each outcome
would lead to.

1) A neutron star is the collapsed remains of a massive star after it "dies". Use the law of conservation of angular momentum to explain why the neutron star spins faster than its parent star.

2) Consider lifting a 10-lb bag of flour (~50 N) 3 feet high (~1 m). To equal the power of a 100-W lightbulb, how fast must you lift the flour?

please answer in full, detail sentences

When a turntable rotating at 16 rev/min is shut off, it comes to rest in 26 s. Assume constant angular acceleration.

(a) Find the angular acceleration.
rad/s²

(b) Find the average angular velocity of the turntable.
rad/s

(c) Find the number of revolutions it makes before stopping.
rev

2D Car Collision

Car Collision in 2D (c7p50) A 900- kg car collides with a 1400- kg car that was initially at rest at the origin of an x-y coordinate system. After the collision, the lighter car moves at 10.0 km/h in a direction of 35 degrees with respect to the positive x axis. The heavier car moves at 13 km/h at -41 degrees with respect to the positive x axis.

A) What was the initial speed of the lighter car (in km/h)? ____Tries 0/7

B) What was the initial direction (as measured counterclockwise from the x-axis)? ___Tries 0/7

At t=0 a grinding wheel has an angular velocity of 27.0 rad/s . It has a constant angular acceleration of 25.0 rad/s2 until a circuit breaker trips at time t = 2.00 s . From then on, it turns through an angle 430 rad as it coasts to a stop at constant angular acceleration.

Through what total angle did the wheel turn between t=0 and the time it stopped?At what time did it stopWhat was its acceleration as it slowed down?

1) A ball is kickedfrom the top of a bridge at a height of 50 m (measured from the surface of the water below) with an initial speed of 30 [m/s] at 22 degrees with respect to the x-axis.

a) Determine the time it takes for the ball to reach its maximum height.

b) Determine the maximum height of the ball (measured from the water below)

c) Determine the speed of the ball at its heighest point on its trajectory

d) Determine the time at which the ball lands/.

e) Where does the ball land? [i.e. Calculate its range]

f) Calculate the velocity of the ball just before it lands[both magnitude and direction]

What is the difference between ultraviolet and visible radiation?

a nonconducting thin spherical shell of radius 6.00 cm has a uniform density of 9.00 nC/m^2.
a. what is the total charge on the shell
b. what is the electric field at a distance of 2.00 cm from the center of the shell?
c. what is the electric field a distance 10.0 cm from the center of the shell.

For each statement, select the phrase that makes the statement true (e.g., if the answer to the first is A and to the others B, enter ABBBB):

1. 
   
2. Two identical shallow containers are placed on identical scales. A live duck is put in one container. Both containers are then filled with water to their brims; it is observed that the duck is standing on the bottom of its container. The reading on the scale under the container with the duck is ____ the reading on the other scale.
3. A boat containing a cement block floats in a swimming pool. The water level in the pool ____ when the cement block is thrown to the shore.
4. A block of wood floats in a pail of water in a stationary elevator. The level of water in the pail ____ when the elevator accelerates upward.
5. Two balloons of the same volume are filled with helium and hydrogen, respectively. The buoyant force on the helium-filled balloon is ____ the buoyant force on the hydrogen-filled balloon.
6. A glass containing an ice cube is filled with enough water to float the ice cube. The water level in the glass ____ when the ice cube melts.

1. Circular motion
   1. If 1 metric ton elevator is accelerating upwards at 7.0 m/s², Calculate the force of tension in the cable.
   2. If the elevator is accelerating downwards at 7.0 m/s² calculate the force of tension in the cable.
   3. Describe the acceleration that is most likely to break the elevator cable.
   4. Now imagine the elevator is in Willy Wonka’s chocolate factor and it can move in any direction. If the elevator is moving at a speed of 3.5 m/s around a curve with a radius of 18 ft, what will the centripetal acceleration of the elevator be?
   5. What will the centripetal force of the elevator be?
   6. If the radius of the curve and the speed of the elevator both double, what will happen to the centripetal force?