In the figure, three 0.03 kg particles have been glued to a rod of length L = 9 cm and negligible mass and can rotate around a perpendicular axis through point O at one end. How much work is required to change the rotational rate (a) from 0 to 20.0 rad/s, (b) from 20.0 rad/s to 40.0 rad/s, and (c) from 40.0 rad/s to 60.0 rad/s? (d) What is the slope of a plot of the assembly's kinetic energy (in joules) versus the square of its rotation rate (in radians-squared per second-squared)?

The active element of a certain laser is made of a glass rod 29.0 cm long and 1.40 cm in diameter. Assume the average coefficient of linear expansion of the glass is equal to 9.00 10-6 (°C)−1. The temperature of the rod increases by 62.0°C.

(a) What is the increase in its length? . cm

(b) What is the increase in its diameter?. cm

(c) What is the increase in its volume? cm3

What is the relationship between the frequency of light and its color?

A defibrillator delivers a jolt of electrical energy to restart a heart that is either stopped or undergoing ventricular defibrillation -- a rapid irregular beating. This energy is supplied by a charged capacitor and applied via paddles placed on a patient's body(one on each side of the heart). Consider a 20.7 μF capacitor charged to 2210 V in a defibrillator and used on a patient. After 9.85×10^-2 seconds the voltage across the defibrillator's paddles drops to 49.6 V.

Find the effective resistance of the body between the defibrillators paddles. Hint: assume the voltage across the paddles is the same as the voltage stored on the capacitor.

A baseball pitcher throws a pitch horizontally from a height of 6 feet with an initial speed of 130 feet per second. a) find a vector valued function describing the position of the ball t seconds after release. b) if home plate is 60 feet away, how high is the ball when it crosses home plate? c)if a person drops a ball from height of 6 feet at the same time the pitcher releases the ball, how high will the dropped ball be when the pitch crosses home plate?

A demented scientist creates a new temperature scale, the "Z scale." He decides to call the boiling point of nitrogen 0 ?Z and the melting point of iron 1000 ?Z.

Part A

What is the boiling point of water on the Z scale?

T_Z = 171 Z

Part B

Convert 1000 ?Z to the Celsius scale.

Part C

Convert 1000 ?Z to the Kelvin scale.

i). How far a driver travel in 80 min. along a straight road if his average velocity is 90 Km/h.

II). If the position of moving an object is given by ?(?) = ??? − ??

a) Calculate the displacement of the particle during the interval t=3s to t=5s.

b) Determine the instantaneous velocity of the particle at t=8s c) Determine the instantaneous acceleration of the particle at t=6s.

IP A charging bull elephant with a mass of 5100 kg comes directly toward you with a speed of 4.50 m/s . You toss a 0.200-kg rubber ball at the elephant with a speed of 7.60 m/s .

What is the speed when it bounces back at you

Describe the Davission-Germer experiment by using the schematic diagram to show electron diffraction.

True/False. Mark your answers to the left of each question.
a. Two solid spheres with the same diameter but different masses will
experience the same acceleration when dropped from the same height.
b. A load being lifted by a crane at a constant velocity has no net force acting
on it.
c. After a firecracker, initially at rest explodes, the total momentum of all of
the pieces is no longer zero.
d. Two solid spheres with different diameters but the same mass are rolled
down an incline. The sphere with the smaller diameter will accelerate
faster.
e. The work done by the net force on an object always causes a change in
objects speed.
f. In an inelastic collision momentum is not conserved.
g. An object in equilibrium has no net torque around any pivot point.
h. The period of a pendulum decreases if the mass of the pendulum
increases.
i. If all of the forces on a system at rest are internal forces, the center of
mass cannot change.
j. If the pressure of an ideal gas is doubled at constant temperature and
number of molecules, the volume of the gas must be halved.
k. The average velocity of molecules in an ideal gas is proportional to three
times the temperature.
l. An isolated system in thermal equilibrium has its maximum value of
entropy.

Assume the average home requires an electrical power of 1.2kW, an average life expectancy of 75 years, and only power from nuclear energy. For such a homeowner, what would be the lifetime generation of vitrified high level waste (HLW) in kg and liters (assuming reprocessing and recycling of U and Pu). the vitrified waste containers in France hold the HLW equivalent of 1.5 fuel recycled assemblies with an energy production of 1 TWh (1E+12 Wh). Compare this to some common size object such as a soda can for ease of conversation. Of course, this ignores other energy needs/requirements for such a person. Explain. How might nuclear power be used to meet these needs also?

Please explain and give an example:

Solving linear and quadratic equations.

Please type answer do not hand write. Thank you.

A heat conducting rod, 1.60 m long, is made of an aluminum section, .9 m long, and a copper section, .7 m long. both sections have a cross-sectional area of .0004 m². the aluminum end and the copper end are maintained at temperatures of 30 degrees celcius and 170 degrees celcius, respectively. the thermal conductivity of aluminum and copper are 205 and 385 W/m*K, respectively. the rate at which heat is conducted in the rod is closest to:

11W

12W

9W

7.9W

10W

Please show the steps how to get to the answer. i really want to learn this.

Suppose two parallel lines of current are 0.85A and 0.35A in the same direction, with the centers of their wires 21cm apart. A -2.04nC particle is fired at 3500m/s in the same direction as both lines of current exactly in between the lines of current.

a. Find the force that acts on the particle and in which direction. If a coordinate system will help, you may assume the currents and particle are in the +x direction and the currents lie in the xy plane.

b. Find the elctric field, magnitude, and direction that would allow the particle to continue to move parallel to the wires.

Thanks in advance! :) Please show all work!

A cell membrane has a resistance and a capacitance and thus a characteristic time constant.

What is the time constant of a 8.3 nm -thick membrane surrounding a 3.6×10−2 mm -diameter spherical cell? Assume the resistivity of the cell membrane as 3.6×106 Ω⋅m and the dielectric constant is approximately 9.0.