Answer:
Karl Schwarzschild discovered black holes in 1916.
Hope this helps!!
Abiotic is non living things. So I would think it would be D. All of the above
According to Newton's second law of motion,
acceleration= Net force divided by mass
Net force of A=10N
Mass of A=10kg
F/M
=10N/10kg = 1 m/s2
Acceleration= 1m/s2