Answer:
D. pre schematic
Explanation:
During the _pre schematic____ developmental stage children are drawing their thoughts instead of merely observations.
Pre schematic stage in children is the age at which they drawing, symbols, spatial figures to express themselves. Their becomes more complex and full of lines as they age. They use single base lines, multiple base lines and fold up views.
Answer:
1.7x10^-10 N
Explanation:
F = G [(m_1)(m_2)]/(r^2)
F = force
G = Gravitational constant 6.67433x10^-11 (N*m^2)/kg^2
m_1 = mass first object
m_2 = mass second object
r = radius between the 2 objects
F = G[(2 kg*2 kg)/(1.25 m)^2]
F = 1.7x10^-10 N
Answer:
water leak is 650 gallons
time required to full drain is 80 hrs
Explanation:
given data
volume V = 3200 gallon
rate = V(t) = 80 - t
to find out
how much water leak between 10 and 20 hour and drain complete
solution
we know here rate is 80 - t
so here rate will be
= 80 - t
and for time 10 and 20 hour
take integrate between 10 and 20
so water leak =
.....................1
water leak = ( 80t - 
water leak = 650
so water leak is 650 gallons
and
we know here for full tank drain condition
water leak full = 80 t - 
3200 = 80 t - 
6400 = t² - 160 t
t = 80
so time required to full drain is 80 hrs
Answer:
Gravity and Friction
Explanation:
How gravity and friction work which u probably know
Ball is projected upwards with speed 20 m/s
now using kinematics

here when ball returns back to same position.
total displacement of ball will be zero.


So ball will return to initial position with same speed in opposite direction.