D a) Suppose your normal resting heart rate is 60 beats per minute. You board a space ship, which travels away from Earth at 0.9c, going towards a star 9 light years away. While on ship, you measure your heart rate. What will it be? b) A spaceship has a rest mass of 500,000 tons. If you could measure its mass when it was traveling at half the speed of light, what would it be?

D a) Suppose your normal resting heart rate is 60 beats per minute. You board a space ship, which travels away from Earth at 0.9c, going towards a star 9 light years away. While on ship, you measure your heart rate. What will it be? b) A spaceship has a rest mass of 500,000 tons. If you could measure its mass when it was traveling at half the speed of light, what would it be?