<span>Scientists have been doing several experimentation
and discovery of the changes of the ice on the pole. Recent evidence from polar
ice core analysis shows that, until now, carbon dioxide levels have never
exceeded 300 ppm in the last several hundred thousand years.</span>
Answer:
3.14g (3.s.f.)
Explanation:
change in mass = 0.25
mass at start = 7.96
percentage change in mass = 0.25/7.96 × 100
= 3.14g (3.s.f.)
Answer:
Kindly check attached picture
Quantity measured is DISTANCE
Explanation:
Segment AB = measures uniform deceleration
BC = Constant speed moved by the car
CD = Uniform acceleration
During uniform deceleration: the speed of the body is reduced at a constant rate with time.
During Constant Speed, the car maintains a Velocity which does not increase or reduce at a certain time interval.
During uniform acceleration the speed of the car increases at a constant rate with time.
B) THE quantity measured by the area covered under a speed-time graph is distance :
With speed on the vertical (y-axis) and time on the horizontal (x-axis)
Area of trapezium = 0.5(AD + BC) × height