The peaks are there where the centre of the concentric circles lie. (Not circles exactly)

You can count a total 4 of them.

So there are a total of 4 peaks

See the attachment. I have marked them with a cross.

8 0

3 years ago

Hợp chất X gồm 2 nguyên tố A và O.Trong đó A cs hóa trị IV.A chiếm 50% về khối lượng.

astraxan [27]

Answer:

A.lap cong thic hoa hoc cua A:va H

8 0

2 years ago

What is the specific heat of an object that weighs 15 grams and changes temperature from 30°C to 37°C when 50 J of heat is added

Scorpion4ik [409]

Answer:

0.4762 J/g°C.

Explanation:

It is known that:

The amount of heat released to water = Q = m.c.ΔT.

where, m is the mass of water (m = 15.0 g).

c is the specific heat capacity of water = ??? J/g°C.

ΔT is the temperature difference = (final T - initial T = 37.0°C - 30.0°C = 7.0°C).

∴ The specific heat capacity of water = c = Q/m.ΔT = (50.0 J)/(15.0 g)(7.0°C) = 0.4762 J/g°C.

8 0

3 years ago