A sample of a radioactive isotope has ¼ of its original activity after 36 days. What is the half life of this isotope?

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

How many times did thomas edison mess up the light bulb