Answer:
Explanation:
Given
initial velocity 
At maximum height velocity of ball is zero
using

where v=final velocity
u=initial velocity
a=acceleration
s=displacement



time taken by the ball to reach the maximum height




At
height of ball is




i.e. ball is moving downward
height at 


Answer:
0.12A
Explanation:
Total voltage produced by the batteries;
V = 1.5 × 4 = 6 v
Then the current that is flowing through the device
Current(I) = V/R
; I = 6/51
;Current = 0.12A
Ep=mgh
h= Ep/mg
h=57÷(3.3×9.8)
h= 57÷32.34
h= 1.8m
So; the answer is B. 1.8m
Answer:
Explanation:
Examples are;
Ultraviolet light from sun.
Heat from a stove burner.
X-ray from an x-ray machine.
Alpha particle emit from a radio active decay of uranium.
Sound waves from your stereo.
Microwave from micro oven.
ultraviolet light from a black light.
Gamma radiations from a supernova.
AND MANY MORE.
Answer: B. 16
Explanation:
The given table:
x y
2.5 6.25
9.4 88.36
15.6 243.63
19.5 380.25
25.8 665.64
Here, we observed that value of y is the square value of x.
i.e.
[For example 2.5²=6.25, 9.4²=88.36, 15.6²=243.63]
Put x=4, we get

Hence, the approximate value of y for x = 4 is 16.
So, the correct option is B. 16 .