Two small nonconducting spheres have a total positive charge of 108.4uC. When placed 1.08m apart, the force each exerts on the other is 12.8N and is repulsive. What is the (larger) charge on the spheres? What is the smaller charge on the other sphere?

Calculate the moment of inertia of a baseball bat for the following cases. (a) Assume the bat is a wooden rod of uniform diameter and take the pivot point to be in the middle of the bat, at the end of the bat, and 5 cm from the end of the handle, where a batter who "chokes up" on the bat would place his hands. Hint: Consider the bat as two rods held together at the pivot point.

a) Estimate the mass of the bat.

m=.552kg

Estimate the length of the bat

estimated length= .75m

(i) in the middle of the bat (Use your estimate.)

(ii) at the end of the bat (Use your estimate.)

(iii) 5 cm from the end of the handle (Use your estimate.)

(b) Assume a realistic bat, which is narrower at the handle than at the opposite end, and consider the three locations from part (a). (i) The estimate from part (a) for the moment of inertia in the middle of the bat is which of the following?

a) too high, b)approximately equal, c) too low

(ii) The estimate from part (a) for the moment of inertia at the end of the bat is which of the following?

a) too high, b)approximately equal, c) too low

(iii) The estimate from part (a) for the moment of inertia 5 cm from the end of the handle is which of the following?

a) too high, b)approximately equal, c) too low

A homemade capacitor is assembled by placing two 9-in. pie pans 4cm apart and connecting them to the opposite terminals of a 6-Vbattery.

Part A:

Estimate the capacitance.

C= ?? V

Part B:

Estimate the charge on each plate.

Q= ?? C

Part C:

Estimate the electric field halfway between the plates.

E = V/m

Part D:

Estimate the work done by the battery to charge the plates.

W= ?? J

An open container holds ice of mass 0.565kg at a temperature of -13.5?C . The mass of the container can be ignored. Heat is supplied to the container at the constant rate of 740J/minute .

The specific heat of ice to is 2100 J/kg?K and the heat of fusion for ice is 334

A 0.460-mol sample of an ideal diatomic gas at 404 kPa and 276 K expands quasi-statically until the pressure decreases to 168 kPa. Find the final temperature and volume of the gas, the work done by the gas, and the heat absorbed by the gas if the expansion is the following.

(a) isothermal

When you look through a fish tank at someone on the other side, you only see a reflection of the fish in the tank. However, the other person can see you clearly. Explain.

An object falls from a height h from rest. If it travels a fraction of the total height of 0.5833 in the last 1.00 s, find the time of its fall.

Find the height of its fall

1. If you had a meter to investigate the electric power system in your home, what voltage would you measure for the electricity coming into your home? What frequency is the power coming into your home? Do all devices in your home operate at this voltage and frequency? How do you know?

2. Appliances A, B, and C consume 250, 480 and 1450 watts of power, respectively. The system voltage is 120V, and the circuit breaker is rated at 15 amps. Which combinations of the three appliances can be on at the same time, and which combinations will trip the circuit breaker? What assumptions would you have to make? What equations and data would you use?

3. Look around your home at some common appliances - a toaster, fan, space heater, television, computer, etc. Which appliances would you predict draw a lot of current to operate? Which appliances would you predict take a lot of power to operate?

Extra credit project: if you would like to investigate this, there is a device called Kill-A-Watt that can measure current, voltage, and power when electrical devices are plugged into them. Measure 10-15 devices in your home and write a mini lab report describing your data and lessons learned by taking these measurements.

You have two carts, a force probe connected to a computer, a motion detector, and an assortment of objects of different masses. Design three experiments to test whether momentum is a conserved quantity. Describe carefully what data you will collect and how you will analyze the data.

is it possible to identify different types of quasars based on its color? please provide a refrence so i can read into it more

A particle with a charge of -60.0 nC is placed at the center of a nonconducting spherical shell of inner radius 20.0 cm and outer radius 36.0 cm. The spherical shell carries charge with a uniform density of -3.37 µC/m³. A proton moves in a circular orbit just outside the spherical shell. Calculate the speed of the proton.

Now, let

A crow is flying horizontally with a constant speed of 3.00 m/s when it releases a clam from its beak. The clam lands on the rocky beach 2.40s later. Consider the moment just before the clam lands. (Neglect air
resistance.)

A diffraction grating has 2605 lines per centimeter, and it produces a principal maximum at = 29.2°. The grating is used with light that contains all wavelengths between 410 and 660 nm. What are the two wavelengths of the incident light that could have produced this maximum? Give the longer wavelength as answer (a).