Ball rolls 6cm in one second. 6cm x 40 sec = 240cm
Answer:
width of fringes are increased
Explanation:
The width of central maxima is given by the following expression
Width = 2 x Dλ / d
- D is distance of screen from source , d is slit width and λ is wavelength of light source.
- Here we see , on d getting decreased , width will increase because d is in denominator .
Due to increased width , position of a fringe moves away from the centre.
Using the formula t=root of 2h/g then where h=28 and g=9.8 then substitute so the answer is 2.4seconds
Answer:
A
Explanation:
the answer would be basicly A
True, an object at rest stays and rest and an object in motion stays in motion
