Other Physics Answers

A curve in a road has a radius of 240 m. If the road surface is level and on a  

               rainy day the coefficient of static friction is 0.48, what is the maximum speed 

               at which the car can negotiate this curve? 

Consider cobalt-60 (⁶⁰CO) with a half-line of 5.25 years. How many years will it take for its activity to decrease to one-fourth of its original amount?

Suppose a space probe moves away from the Earth at a speed 0.350c. It sends a radio wave message back to the Earth at a frequency of 1.50 GHz. At what frequency is the message received on the Earth?

Calculate the rest energy of a single proton. Use the equation E=mc² to solve the problem.

Suppose a spaceship is approaching the Earth at half the speed of light and shoots a canister at a speed of 0.750c.

a). At what velocity will an Earth-bound observer see the canister if it is shot directly towards the Earth?

b). If it shot directly away from earth?

A 1.0 kg object is brought to planet Mercury where the acceleration due to gravity is 0.38 times its value on Earth. (a) What is the weight of the object on Earth? (b) What is the mass of the object on Mercury? What is its weight on Mercury?

A runner goes north 500 m, turns east 1050 m and then goes south for 800 m.  

             What is his displacement relative to his starting point? 

A uniform meterstick is supported at the 50 cm mark. A 25N weight is placed at the 10 cm mark. Where should a 200N weight be placed for the meterstick to be in equilibrium?

If A=6i-8j , B=8i+3j and C=26i+19j determine a and b so that aA+bB+C=0

The vector is given by R=3i+4j-5k find the magnitude of the xy component and the angle between R and xy axis