one mole of water contains 6.02 x 1023 MOLECULES of water. But each molecule of water contains 2 H and 1 O atom = 3 atoms, so there are approximately 1.8 x 1024 atoms in a mole of water.

6 0

2 years ago

What is the equivalent of π\4 radians in degrees?

ratelena [41]

$\pi radians$ = 180 degrees
$\pi /2 radians$ = 90 degrees
$\pi /4 radians$ = 45 degrees

4 0

3 years ago

Read 2 more answers

An ice cream truck that plays loud music is circling Bulans neighborhood. C(t) models the volume of the music in dB that Bulan h

ELEN [110]

Answer:

5.5 minutes

Step-by-step explanation:

Fill in the given information and solve for t.

75 = -15cos(2πt/15) +65

-10/15 = cos(2πt/15)

t = 15/(2π)arccos(-2/3) ≈ 5.492

The volume reaches 75 dB about 5.5 minutes after the truck arrives.

8 0

2 years ago