Answer:
19
Explanation:
I legit did this and it took 19.
Answer:
12.1 seconds
Explanation:
t = Time taken
u = Initial velocity
v = Final velocity = 0
s = Displacement = 120 m
a = Acceleration due to gravity on Moon = 1.67 m/s²
Equation of motion


Time taken by the rock to hit the bottom of the crater is 12.1 seconds
Answer: 10.8 g
Explanation: Density = mass/ volume
So, Mass = density * volume = 0.9 g/ml * 12 ml = 10.8g
Answer:
Tech A is right.
Explanation:
Its the ability of quartz crystal that if we apply a mechanical stress on them by an applied force then they can produce the electricity or voltage. This phenomenon of producing electricity by squeezing a crystal is termed as piezoelectricity or a piezoelectric effect.
Answer: Always accelerates in a downward direction
Explanation: Gravity is pulling the ball downward