Answer:
11.3 g
Explanation:
given,
density of the lead = 11.3 g/cm³
volume = 1 cm³
mass of the lead = ?
we know,
mass = volume x density
mass = 1 x 11.3
mass = 11.3 g
hence, the mass of the lead is equal to 11.3 g
Answer:
Option 2
Explanation:
Weight of the box is being acted downwards due to gravity
However, based on Newton's third law (for every action (force) in nature there is an equal and opposite reaction), an equal force will act on the box by the table
Answer:
Explanation:
Cutting a string in half because
b is irreversible
c is a cheical and d is also a chemical change
Answer:
705.6 m
Explanation:
time, t = 12 sends
initial velocity, u = 0
Acceleration due to gravity, g = - 9.8 m/s^2
As the object is falling freely so the initial velocity is zero.
Let the distance traveled by the body is h in time t = 12 s.
Use second equation of motion
Ad the distance is downwards so take it as negative
So,
h = 705.6 m
Thus, the distance traveled in 12 second is 705.6 m
Answer:
18.60 m/s
Explanation:
Original momentum = mv = 4000 with m = 115
after collision m = 115 + 100 = 215 kg
but the total momentum is still the same (conserved)
4000 = 215 v shows v = 18.60 m/s