The area of the bar over r = 2 is 0.234. what is the area of the bar over r = 4?

A student wants to make a very small particle accelerator using a 9 V battery. What speed will a proton have after being accelerated from rest through the 9 V potential difference?

An air track glider of mass m1 = 0.200kg moving at 0.750m/s to the right collides with a glider of mass m2 = 0.400kg at rest. If m1 rebounds and moves to the left with a speed of 0.250m/s, what is the speed and direction of m2 after the collision.

How is thermal energy naturally transferred between objects? A. From the object with slower molecules to the one with faster molecules B. From the hotter object to the cooler object C. From the larger object to the smaller object D.

A 200 watt t. v. is used for 20 hours in a week. If it is used for four weeks then what is cost of electricity if rate is 5rs/kwh

What is the simulation theory?

Most geologists believe that the dinosaurs became extinct 65 million years ago when a large comet or asteroid struck the earth, throwing up so much dust that the sun was blocked out for a period of many months. A.

If you drop a silver dollar off a building and it hits the ground in 10 seconds, how fast was the coin going just before it hit?

What is the weight of an with a mass of 32kg

The index of refraction of silicate flint glass for red light is 1.620 and for violet light is 1.660. A beam of white light in this glass strikes the glass-air interface at a 25.50∘ angle of incidence and refracts out into the air.

The locations of the major pressure and wind systems on the earth: