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kenny6666 [7]
3 years ago
7

The tendency for an object to sink or float has to do with the object's density. True False

Physics
1 answer:
Stella [2.4K]3 years ago
4 0

Answer:

TRUE

Explanation:

BECAUSE AN OBJECTS DENSITY  SHOWS HOW MUCH WEIGHT IS PER CUBIC UNIT. LIKE SAD HAS MORE DENSITY THAN WATER SO IT SINKS WHILE WOOD HAS LESS DENSITY THAN WATER SO IT FLOATS

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Nevermind i dont need it anymore! thank you.
Sidana [21]

it's alright ok fine ! no problem you most welcome!

3 0
2 years ago
Calculate the amount of heat needed to increase the temperature of 200 grams of water at 10°C to 95°C.
Alexus [3.1K]

the amount of heat need is 71060 Joules

Explanation

The equation for the amount of heat needed to increase the temperature of water is as follows:

\begin{gathered} E=mC(T_2-T_1) \\ where \\  \\  \end{gathered}

where E is the amount of heat

C is the specific heat capacity of water having a standard value of 4180 J/kg*K

T is the final ans initial temperature in kelvin

m is the mass

so

Step 1

given

\begin{gathered} mass=m=200\text{ gr=0.2 kg} \\ T_1=10\text{ \degree C} \\ T_2=95\text{ \degree C} \\ C=4180\text{ J/kh*K} \end{gathered}

a) convert the temperature into kelvin

\begin{gathered} 10\text{ \degree C=\lparen10+273\rparen K=283 K} \\ 95\text{ \degree C=\lparen95+273 \rparen K=368 K} \end{gathered}

now, replace in the formula

\begin{gathered} E=mC(T_{2}-T_{1}) \\ E=0.2\text{ kg*4180L/kg*K*\lparen368K-283 k\rparen} \\ E=71060\text{ J} \end{gathered}

therefore, the amount of heat need is 71060 Joules

I hope this helps you

7 0
1 year ago
Read 2 more answers
A rock falls from a cliff and hits the ground at a velocity of 31m/s. How long did it take to fall?
Paladinen [302]

Answer:

i dont know  man

Explanation:

i dont know man

4 0
3 years ago
Read 2 more answers
A certain electric circuit obeys Ohm's law. If the resistance of the circuit is doubled, what will happen to the current through
netineya [11]

Answer:

currrent will be halved

Explanation:

v = ir

v/r = i      multiply both sides by  1/ 2

v / (2r) = 1/2 i  

4 0
3 years ago
Which evidence did Ottowa scientists collect in researching PCB concentrations in Alaska?
Sergio [31]
PCBs were found in greater concentrations in lakes where more salmon spawned.
7 0
3 years ago
Read 2 more answers
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