A) Pure substances, Chemical changes
Answer:
True a, c and d
Explanation:
The correct statements that should be included in the answers are:
a) True. Bowling balls are round
b) False. The balls have different colors
c) True. If the balls are made of a very hard material
d) True. If the balls have a smooth polished surface at the same time, but not soft
Answer:
8.756 rad/s²
Explanation:
Given that:
A motorcycle accelerates uniformly from rest, then initial velocity v_i = 0 m/s
It final velocity v_f = 24.8 m/s
time (t) = 9.87 s
radius (r) of each tire = 0.287 m
Firstly; the linear acceleration of the motor cycle is determined as follows:
=(V_f - v_i)/t
=(24.8-0)/9.87
=2.513 m/s²
Then; the magnitude of angular acceleration
α =
/r
=2.513/0.287
=8.756 rad/s²
Answer:
Value of 
Explanation:
We have given
In first case resistance is
and current is 1.8 A
Let the potential difference is v
So
----eqn 1
In second case resistance is
and current is 1.6 A and potential difference will be as it is a series connection
So
----eqn 2
From eqn 1 and eqn 2

