An astronaut at rest on earth has a heartbeat rate of 61 beats/min. when the astronaut is traveling in a spaceship at 0.81c, what will this rate be as s measured by an observer also in the ship and an observer at rest on earth? (a) an observer also in the ship 0.5962 your response differs significantly from the correct answer. rework your solution from the beginning and check each step carefully. beats/min (b) an observer at rest on earth 61 your response differs from the correct answer by more than 10%. double check your calculations. beats/min

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.