A conducting spherical shell of inner radius r1 and outer radius r2 has a charge Q on it. An additional charge, also Q, is then added to the sphere. What is the resulting charge per unit area on the outer surface of the sphere?

Which of the following materials would generate the strongest magnetic field if used as the core? silicon plastic carbon iron

what is an expression representing a chemical reaction; the formula of the reactants are connected by an arrow with the formulas for the products

PV 45 cm dry air capillary tube 15 cm mercury thread 15 cm 30 cm dry air form cross-sectional area in two arrangements. Using the data in the 7 Fig. 10.

Third parties do best when: A) they concentrate on winning national office, not state and local elections. B) there is a major scandal. C) they have a dynamic candidate. D) trust in the major parties is low.

An airplane is heading due south at a speed of 640 km/h. If a wind begins blowing from the southwest at a speed of 70 km/h (average), calculate the following. (a) the velocity (magnitude and direction) of the plane relative to the ground 643.

In mammals, the weight of the heart is approximately 0.5% of the total body weight. Write a linear model that gives the heart weight in terms of the whole body weight. Use the model to fins a. the weight of a human whose weight is 183 lbs.

For a projectile launched from the vertically from the surface the earth with initial velocity v0, the velocity of the projectile when at distance r from the center of the earth satisifes the equation: v^2 =

What is the formula for convection?

A 398-kg boat is sailing 14.0° north of east at a speed of 1.50 m/s. 23.0 s later, it is sailing 33.0° north of east at a speed of 4.40 m/s. During this time, three forces act on the boat: a 32.8-N force directed 14.

You use sunglasses to reduce the glare of the sun when you go outside. You are taking advantages of light's ability to do which of the following? Possible Answers: to reflect to refract to diffract to polarize