Describe how the electrons in Rutherford's atom must have behaved, and explain why this model could not have been possible.

The angular position of a point on the rim of a rotating wheel is given by θ = 9.33t - 3.93t2 + 1.09t3, where θ is in radians and t is in seconds. What are the angular velocities at (a) t = 2.13 s and (b) t = 8.41 s? (c) What is the average angular acceleration for the time interval that begins at t = 2.13 s and ends at t = 8.41 s? What are the instantaneous angular accelerations at (d) the beginning and (e) the end of this time interval?

A yo-yo has a rotational inertia of 977 g

A beetle with a mass of 25.0 g is initially at rest on the outer edge of a horizontal turntable that is also initially at rest. The turntable, which is free to rotate with no friction about an axis through its center, has a mass of 80.0 g and can be treated as a uniform disk. The beetle then starts to walk around the edge of the turntable, traveling at an angular velocity of 0.0700 rad/s clockwise with respect to the turntable. (b) With respect to you, motionless as you watch the beetle and turntable, what is the angular velocity of the beetle? Use a positive sign if the answer is clockwise, and a negative sign if the answer is counter-clockwise. rad/s (c) What is the angular velocity of the turntable (with respect to you)? Use a positive sign if the answer is clockwise, and a negative sign if the answer is counter-clockwise. rad/s (d) If a mark is placed on the turntable at the beetle's starting point, how long does it take the beetle to reach the mark again?

1. Theoretically prove the boundary conditions for waves in closed-open tubes. Please provide pictures.

Please answer these 3 questions...thank you!

1. List two ways in which electric and magnetic fields and forces are similar.
2. List two ways in which electric and magnetic fields and forces are different.
3. If moving charges create a magnetic field, explain how a bar magnet has a magnetic field.

calculate the work done when: a) a 55 N force acting at an angle of 28 degrees to the horizontal pushes an object 5m horizontally. b) a spring of spring constant 45n/m is stretched by 32cm.

6-Torque on a coil. A circular loop of wire has a diameter of 20.0 cm and contains 10 loops. The current
in each loop is 3.00 A, and the coil is placed in a 2.00-T external magnetic field. Determine the maximum
and minimum
torque exerted on the coil by the field.

Your employer asks you to build a 23-cm-long solenoid with an interior field of 6.0 mT . The specifications call for a single layer of wire, wound with the coils as close together as possible. You have two spools of wire available. Wire with a #18 gauge has a diameter of 1.02 mm and has a maximum current rating of 6 A. Wire with a #26 gauge is 0.41 mm in diameter and can carry up to 1 A.

A) Which wire should you use?
B) What current will you need?

Find the electric field vector anywhere in the plane of a dipole. Let the charge value on one
charge be q. Let them be separated by d. Let the origin be in between them. And say they are
each on the y axis.

Please include a diagram in your answer

Find numerical examples of energy usage and thermodynamic computations of efficiency. Use the web to compare the efficiencies of several power production processes. Which are in use and which are planned?

Be sure to cite your sources. Wikipedia, while useful, is not a primary source, and you should not cite it.

To earn the maximum number of points for this discussion, you must:

Post your response of at least 150 words

the total voltage change around a circuit is always positive.

this is a false statement. why?

In the figure (Figure 1) a conducting rod of length L = 37.0 cm moves in a magnetic field B⃗ of magnitude 0.500 T directed into the plane of the figure. The rod moves with speed v = 6.00 m/s in the direction shown.

Part A

What is the potential difference between the ends of the rod?

Part C

When the charges in the rod are in equilibrium, what is the magnitude of the electric field within the rod?

Part F

What is the potential difference across the rod if it moves parallel to ab?

Part G

What is the potential difference across the rod if it moves directly out of the page?

A 1210 kg car is driving on 60 km/h on an inclined plane. The car is located on the top of the plane. The plane is 655 m long and the angle is 4.50 degrees.

a) What will the speed of the car be if there is no friction ?

b) Now the car is on 85 km/h at the bottom of the inclined plane. How much friction force works on the car its way down ?

c) If the same friction force works on the car as when it drow up the plane, what does the mechanical power need to be so the car can drive on 85 km/h ?

d) Lets assume thet the same friction force works on the car that drives in a normal driving. How much gas will the car spend on a hundred ef the heat of reaction of the gas is 38 MJ/liters and the efficiency is 21 %

Help please.

A fulcrum is placed at the 55 cm position of a 100 cm (1 meter) stick with a mass of 18 kg. a 10 kg mass is placed at 70 cm position. where must a 5 kg mass be placed so that the net torque is zero? (assume the mass of the meter stick is uniformly distributed)