20. The change in isotopes over time due to the emission of radioactive particles is known as

A. absolute-age dating.

B. radioactive decay.

C. half-life.

D. radiometric dating.

Snoopy throws a ball horizontally at 25 m/s from a roof that is 15 m high to hit the cat next door. The ball misses the cat. How far does the ball travel before hitting the ground? How long does it take to hit the ground?

Which of the following quantities are vectors? Select all that apply. Which of the following quantities are vectors? Select all that apply. 27 J/s 1980 kg m/s due south 35 m/s 8.2 m/s2 north-west 3.2 mi straight up 2.9 m/s 2 293 K 200 s

What occurs when solar radiation bounces off a surface? texturization absorption reflection energization

Andrew lifts a table 7 meters from the ground floor of her house to his attic. If the table weighed 20 kg, what is the gravitational potential energy gained by the table? Estimate g as 9.81. 1300 O 1400 1500 J 1600J 1700

Describe what causes the flow of electric

Suppose a person whose mass is m is being held up against the wall with a constant tangential velocity v greater than the minimum necessary. Find the magnitude of the frictional force between the person and the wall

A ball is being rolled by a normal push of 1000N. it is opposed by friction which has a force of 0.3kN and air resistance which has a force of 23N. Calculate the resultant force.

Consider a Young's two-slit experiment in which the wavelength of light is 37% smaller than the distance between the slits.

Which of the following situations would produce an average velocity of zero? A) a round-trip to school and back B) a horse galloping in a field C) the criss-crossing path of a flying bug D) a trip, first to the moon, then onto Mars

A 111.6 g sample of iron was heated from 0°C to 20°C. It absorbed 1004 J of energy. What is the specific heat capacity of iron?