Calculate the weight of the astronaut on Earth and give the unit. Use the equation: weight = mass x gravitational field strength
The gravitational field strength on Earth is 10kg​

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

The softest and hardest minerals are: softest hardest

Quantum mechanics applies to subatomic, atomic, nanometer-size, and micrometer-size systems. nanometer, micrometer, and kilometer-size systems. atomic, nanometer-size, and micrometer-size systems. subatomic, atomic, and nanometer-size systems.