This table lists some characteristics of two planets. Mercury
Mars
Mass
3.3 x 1023 kg 6.42 x 1023 kg
3.7 m/s2 3.7 m/s2
Gravity
Distance 4879 km
6792 km
Which statement is true?
A. Mars's diameter is less than Mercury's.
B. Mercury and Mars have the same gravitational force.
c. An object's weight is the same everywhere in the universe.
D. Mars's mass is less than Mercury's.
SUBMIT

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.

Describe two recent or ongoing space missions.

The distribution of related animals and plants across the world