half life worksheet answer key 3. What percent of a sample As-81 remains un-decayed after 43.2 seconds

The density of blood is 1.05 kg/m3, find the mass of a bag of blood for a transfusion, if the volume is 2.0 m3.

A sample of ancient granite crust is dated using potassium-40. Scientists find that 50% of the potassium-40 has decayed to form argon-40. Approximately how old is this rock?

Which parts of the model represent a high tide

Explain how an increase or decrease in the permeability (i. e. opening or closing channels permeable) to K+, Na+, Ca2+, or Cl - would change the membrane potential from rest.

Describe how a change in the geosphere affect the biosphere?

Beth made the chart shown. A 2-column table with 1 row. The first column labeled X has entries Wall clock, T V remote control, Portable music player. The second column labeled Y has entries Refrigerator, Table lamp, Hair dryer.

Which sentence states Newton's third law? If two objects collide, each object exerts a force in the same direction as the other. If two objects collide, each object exerts a force equal to and in the opposite direction of the other.

Why did the chicken cross the road.

A 98.1 kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.69 rad/s. A monkey drops a 9.29 kg bunch of bananas vertically onto the platform.

7. A type of non-renewable energy would be: O wind O petroleum O water solar