HELP ME Quantitatively compare your value for g to the current best estimate for the earth's acceleration due to gravity (page 76 in your textbook). Consider your uncertainty when you compare. Are your calculations close to the actual value? Why or why not?

The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. if 1 gram of this isotope is present initially, how long will it take for 80% of the lead to decay? (round your answer to two decimal places.)

Does the earth behave like a magnet how do you prove it

Adistance-time graph indicates than an object moves 100 m in 4 s and then remains at rest for 6 s. what is the average speed of the object?