Answer:
3 cm
Explanation:
I think the question have some error because if height = 2 m = 200cm.
Volume of box = l * b * h
V = 30 cm³
b = 5 cm
h = 2 cm
l = ?
V = l * b * h
30 cm³ = l * 5 * 2
l = 30 / 10
l = 3 cm
Answer:
72 minutes
Explanation:
The combined rate of the two machines is 250 bolts/hr:
(100 bolts/hr) + (150 bolts/hr) = 250 bolts/hr
The number of bolts is equal to the rate multiplied by time, therefore an expression for time can be found:
Bolts = (rate)(time) >> Time = (bolts)/(rate)
The time necessary to make 300 bolts is:
Time = (bolts)/(rate)
Times = (300 bolts) / (250 bolts/hr) = 1.2 hr
The time in hours is converted to time in minutes as follows:
(1.2 hr) (60 min/hr) = 72 minutes
Answer:
The time constant is 
Explanation:
From the question we are told that
the time take to charge is 
The mathematically representation for voltage potential of a capacitor at different time is
Where 
is the time constant
is the potential of the capacitor when it is full
So the capacitor potential will be 100% when it is full thus 
100% = 1
and from the question we are told that the at the given time the potential of the capacitor is 85% = 0.85 of its final potential so
V = 0.85
Hence
Yes echolocation is based on the use of sound and knowing where the sound comes from without having to look for it a lot of soldiers on the battle field need to know how to use echolocation so they can basically not die
Answer:
M = 328.70g
Explanation:
From the given values:
V = 346 cm³
M of 1 cm³ of Polythene = 0.95g or 95/100g
Solve:
M = <u>(95×346)</u>
10
= <u>3</u><u>2</u><u>8</u><u>7</u><u>0</u>
100
M = 328.70g
