White objects do not absorb all wavelenghts. The statement is false
Explanation:
cellulose and pectin are present on the cells of collenchyma...
The puddle dries up cause of the radiation from the sun
Answer:
v = 0.489 m/s
Explanation:
It is given that,
Mass of a box, m = 1.5 kg
The compression in the spring, x = 6.5 cm = 0.065 m
Let the spring constant of the spring is 85 N/m
We need to find the velocity of the box (v) when it hit the spring. It is based on the conservation of energy. The kinetic energy of spring before collision is equal to the spring energy after compression i.e.


So, the speed of the box is 0.489 m/s.
Explanation:
The formula for KE ( Kinetic Energy ) is : 1/2 mv²
Solution:
- First we solve for v ( velocity ) using the formula 2gh, where g is gravity [ 9.8 m/s² ] and h is height [ 1.25 m ]
= 2 ( 9.8 m/s² × 1.25 m ) = 24.5 m/s
- The velocity is 24.5 m/s.
- Now solve for KE using the formula 1/2 mv²
= 1/2 ( 40 kg × 24.5m/s ² )
= 1/2 ( 40 kg × 600.25 )
= 1/2 ( 24,010 )
= 12,005 Joules
- The diver's kinetic energy is 12,005 J.