3 years ago

As the water molecules heat up they become more dense and float to the top. True or False

Physics

1 answer:

miss Akunina [59]3 years ago

8 0

Answer: False but read why

Heated water molecules expands ( become less dense) but they do float to the top.

You might be interested in

A 20~\mu F20 μF capacitor has previously charged up to contain a total charge of Q = 100~\mu CQ=100 μC on it. The capacitor is t

sertanlavr [38]

Explanation:

The given data is as follows.

C = $20 \times 10^{-6} F$

R = $100 \times 10^{3}$ ohm

$Q_{o} = 100 \times 10^{-6}$ C

Q = $13.5 \times 10^{-6} C$

Formula to calculate the time is as follows.

$Q_{t} = Q_{o} [e^{\frac{-t}{\tau}]$

$13.5 \times 10^{-6} = 100 \times 10^{-6} [e^{\frac{-t}{2}}]$

0.135 = $e^{\frac{-t}{2}}$

$e^{\frac{t}{2}} = \frac{1}{0.135}$

= 7.407

$\frac{t}{2} = ln (7.407)$

t = 4.00 s

Therefore, we can conclude that time after the resistor is connected will the capacitor is 4.0 sec.

4 0

3 years ago

The student draws an arrow on the paper to mark the incident ray. She marks the

garri49 [273]

Answer:

Explanation:

Snell's law

1.00sin66 = nsin38

<u>n = 1.48</u>

3 0

3 years ago

A car travelling at 15 m/s comes to rest in a distance of 14 m when the brakes are applied.

stira [4]

Answer:

-8.04 m/s2

Explanation:

To find the answer to this, you have to use the 4th kinematic equation:

$v^{2} = v^{2}_{0} + 2ax$

You plug into the equation to get:

$0 = 15^{2} + 2a(14)$

solve for a to get

-8.04 m/s2

3 0

3 years ago

Technician A says that other temperature sensors that operate like the ECT include transmission fluid temperature (TFT), and eng

PIT_PIT [208]

Answer Choices:

a. Technician A only

b. Technician B only

c. Both technicians A and B

d. Neither technician A nor B

Explanation:

a. Technician A only

5 0

3 years ago

Five hundred joules of heat are added to a closed system. The initial internal energy of the system is 87 J, and the final inter

mina [271]

The answer is D. i got all the other ones wrong ._.

8 0

3 years ago

Read 2 more answers