An isotope has a half life of 2 days. After 6 days, how much of the original material is left?

A. 12%

B. 12.5%

C. 30.2%

A Ping-Pong ball is given an upward initial velocity. The force of air resistance causes the times of ascent and descent to be unequal. Which time is greater?

Which of the following is an accurate statement? A. Step-up voltage transformers have a lower number of turns in the primary than in the secondary winding. B.

Where are the metals located on the periodic table

he graph shows a marble rolling down a curve from position 1 to position 5. In which position is the potential energy of the marble greatest?

A molecule is Select one: a. a carrier of one or more extra neutrons. b. a combination of two or more atoms. c. less stable than its constituent atoms separated. d. electrically charged. e. none of these.

When an ocean plate converges with another plate, what is created on the seafloor at the line of convergence?

Calculate the angle of refraction of 30.0° light shines from water into ice. The indices of refraction for water and ice are 1.36 and 1.31, respectively. A) 19.8° B) 31.3° C) 40.9° D) 64.0°

What is the length of a simple pendulum with a period of 2.0 s?

How many electrons are necessary to produce 1.0 c of negative charge? (e = 1.60 Ã 10-19 c) ?

A car is traveling at 64 ft/s when the brakes are fully applied, producing a constant deceleration of 18 ft/s2. What is the distance covered before the car comes to a stop? (Round your answer to one decimal place.)