Americium 241 decays into neptunium 237 which correctly describes this process of radioactive decay

What happens to the orbit of Earth when the mass of the Sun is reduced to 75,000? a. The orbit does not change c. The orbit gets larger b. The orbit gets smaller d. The Sun begins to orbit the Earth

1. Set frequency of wave generator to 5Hz. 2. Set amplitude of wave generator to 1cm. 3. Place the barriers 10cm from the wave generator. 4. 5. Sketch the diffraction pattern observed. What should be step 4?

Which of the following is true about rocks? A. rocks are composed of only one mineral. B. Rocks do not contain any nonmineral matter. C. coal is not considered a true rock. D. most rocks are a mixture of minerals.

A 36,287 kg truck has a momentum of 907,175 kg •. What is the truck's velocity?

The Earth's orbit around the sun is approximately circular. What is the direction of the net force on the Earth? A) Towards the sun B) In the direction of its velocity C) Opposite direction of its velocity D) Away from the sun

Thermal energy from the Earth's core heats rock and creates magma. This hot magma then rises toward the Earth's surface, cools, and sinks back down toward the Earth's core. Which actions below occur during this process? (multiple answers) A.

A surface is bombarded by particles, each of mass small 'm', which have velocity normal to the surface. On average, n particles strike unit area of the surface each second and rebound elastically. What is the pressure on the surface? A. nmv B.

If an atom has twelve electrons, how many electrons are in the n=1 energy level? how many electrons are in the n=2 energy level? how many electrons are in the n=3 energy level?

Which object is largest? star galaxy globular cluster planet?

What if the population of rabbits decrease, what would happen with foxes and owls?