A certain radioactive substance has a half life of one hour. if you start with 1g of the material at noon how much will be left at 3:00 PM?

The time period of a 50 Hz oscillator is

Two identical steel balls mounted on wooden posts initially have different amounts of charge, one with - 14uC and the other with - 2uC. the balls are allowed to touch then separated again. what is the final charge on each ball?

With what maximum precision can its position be ascertained? [hint:? p=m? v.]

Which transmits the most light? A. Tinted glass B. Opaque glass C. Clear glass D. All types transmit light equally

Which planet has an AU of 5.20? A. Uranus B. Earth C. Mercury D. Jupiter

Energy of motion is known as what energy

While a constant total force of 17 n is exerted on a cart, the cart's acceleration is 5 m/s2. find the mass of the cart?

Which of the following is NOT a possible cause of a genetic disorder in humans? changes in the number of chromosomes mutations in the DNA of genes being born underweight changes in the structure of chromosomes

According to Newton's Law of Universal Gravitation, which of the following would cause the attractive force between a planet and the Sun to be doubled? A. Doubling the mass of the planet B. Quadrupling the distance from the sun C.

Hannah has information about an object in circular orbit around Earth. mEarth = 6.0 * 1024 kg G = 6.67 * 10-11 What additional information does Hannah need in order to calculate the tangential speed of the orbiting object?