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3 years ago

6

The average American student is in class for 330minutes/day. How many hours/day is this?

2 answers:

yKpoI14uk [10]3 years ago

5 0

In one day the average american student is in class for 5.5 hours and inone week they are in class 1 day and 3.5 hours

o-na [289]3 years ago

4 0

1 hour = 60 minutes
Set up a ratio:
(330 min / x hours) = (60 min / 1 hour)
x = (330×1)÷60
x = 5.5 hours
To check:
5.5 hours × 60 = 330 minutes

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Vaselesa [24]

Answer:

Scientific Explanation of weather change and cause storms is described below in detail.

Explanation:

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3 years ago

Can someone please check k these to see if I have any mistakes

iren [92.7K]

I do not see any mistakes so I think you’re good!

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A 1 mL pipette delivers a measured volume of .98 mL (calculate the percentage error)

Natalija [7]

Answer:

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Explanation:

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3 years ago

Read 2 more answers

An inverted pyramid is being filled with water at a constant rate of 45 cubic centimeters per second. The pyramid, at the top, h

vaieri [72.5K]

Answer:

13.20 cm/s is the rate at which the water level is rising when the water level is 4 cm.

Explanation:

Length of the base = l

Width of the base = w

Height of the pyramid = h

Volume of the pyramid = $V=\frac{1}{3}lwh$

We have:

Rate at which water is filled in cube = $\frac{dV}{dt}= 45 cm^3/s$

Square based pyramid:

l = 6 cm, w = 6 cm, h = 13 cm

Volume of the square based pyramid = V

$V=\frac{1}{3}\times l^2\times h$

$\frac{l}{h}=\frac{6}{13}$

$l=\frac{6h}{13}$

$V=\frac{1}{3}\times (\frac{6h}{13})^2\times h$

$V=\frac{12}{169}h^3$

Differentiating V with respect to dt:

$\frac{dV}{dt}=\frac{d(\frac{12}{169}h^3)}{dt}$

$\frac{dV}{dt}=3\times \frac{12}{169}h^2\times \frac{dh}{dt}$

$45 cm^3/s=3\times \frac{12}{169}h^2\times \frac{dh}{dt}$

$\frac{dh}{dt}=\frac{45 cm^3/s\times 169}{3\times 12\times h^2}$

Putting, h = 4 cm

$\frac{dh}{dt}=\frac{45 cm^3/s\times 169}{3\times 12\times (4 cm)^2}$

$=13.20 cm/s$

13.20 cm/s is the rate at which the water level is rising when the water level is 4 cm.

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3 years ago

Homolysis, or homolytic bond dissociation, produces a very specific type of product under certain reaction conditions. In Part 1

vekshin1

Answer:

1) R₃CO , H, H₃C, a carbon free radical

2) high temperature, ultraviolet irradiation

Explanation:

1) Homolysis leads to the formation of free radicals (species having a free electron). Thus, answer is :

R₃CO

H

H₃C

a carbon free radical

2) Homolysis require high temperature, ultraviolet irradiation.

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3 years ago