Sally wins the race by 0.03 min
Explanation:
To find time = distance / velocity
Sally;
1 mile / 12 mph
= ¹/12 hrs * 60
= 5 min
Ramona;
³/4 mile ÷ 11 mph + ¹/4 mile ÷ 16 mph
= ³/44 hrs + ¹/64 hrs
= 4.09 min + 0.94 min
= 5.03 min
I'd say b, precise, here.
If there's an error somewhere in the experiment or project, then it is consistently .... wrong. So, just 'cos you measure something precisely, it doesn't mean that you've measured it accurately. Maybe an example would be a measurement of length. If you used a metal ruler at zero degrees C, you can measure to say half a millimetre. A series of measurements of the same object would give very similar readings. But, if you used same metal ruler at, say 100 celsius (implausible) then you'd probably get a different set of readings. 'cos of the expansion of the metal ruler.
is this a true of false cuz if so this it true
Answer:
<h3>a.</h3>
- After it has traveled through 1 cm :
- After it has traveled through 2 cm :
<h3>b.</h3>
- After it has traveled through 1 cm :
- After it has traveled through 2 cm :
Explanation:
<h2>
a.</h2>
For this problem, we can use the Beer-Lambert law. For constant attenuation coefficient 
the formula is:
where I is the intensity of the beam, 
is the incident intensity and x is the length of the material traveled.
For our problem, after travelling 1 cm:
After travelling 2 cm:
<h2>b</h2>
The optical density od is given by:
.
So, after travelling 1 cm:
After travelling 2 cm:
Answer:true
Explanation:
It takes the moon approximately a month to complete an orbit round the earth
