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4 years ago

12

Someone give me a hand plz

1 answer:

alina1380 [7]4 years ago

5 0

Answer:

No, they did not live at the same time.

Explanation:

Hope this helps!

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Hi can u help me with this?

xxTIMURxx [149]

Answer:

evaporation

Explanation:

When water absorbs enough heat, it becomes a gas (water vapor). This process is called evaporation

4 0

3 years ago

Read 2 more answers

During the nuclear fission process, the transformation between a parent and daughter isotope involves a a release of neutrons an

denis-greek [22]

Answer:

The energy harnessed in nuclei is released in nuclear reactions. Fission is the splitting of a heavy nucleus into lighter nuclei and fusion is the combining of nuclei to form a bigger and heavier nucleus. The consequence of fission or fusion is the absorption or release of energy.

Introduction

7 0

3 years ago

A car travels 2.5 hours in a Northern direction for 300km. Determine the cats speed and velocity

nika2105 [10]

Answer:

Velocity = 120 km/h in north

Speed = 120 km/h

Explanation:

Given data:

Distance = 300 km north

Time taken = 2.5 hr

Speed and velocity = ?

Solution:

Speed = distance / time

Speed = 300 km / 2.5 h

Speed = 120 km/h

Velocity = change in position / change in time

Velocity = 300 km north / 2.5 hr

Velocity = 120 km/h in north

3 0

3 years ago

Pls help 6th grade science

lys-0071 [83]

Answer:

C.)

Explanation:

I also saw this question on Brainly! Hope this helps!

5 0

3 years ago

A pycnometer is a precisely weighted vessel that is used for highly accurate density determinations. Suppose that a pycnometer h

dexar [7]

Answer:

5.758 is the density of the metal ingot in grams per cubic centimeter.

Explanation:

1) Mass of pycnometer = M = 27.60 g

Mass of pycnometer with water ,m= 45.65 g

Density of water at 20 °C = d = $998.2 kg/m^3$

1 kg = 1000 g

$1 m^3=10^6 cm^3$

$998.2 kg/m^3=\frac{998.2 \times 1000 g}{10^6 cm^3}=0.9982 g/cm^3$

Mass of water ,m'= m - M = 45.65 g - 27.60 g =18.05 g

Volume of pycnometer = Volume of water present in it = V

$Density=\frac{Mass}{Volume}$

$V=\frac{m'}{d}=\frac{18.05 g}{0.9982 g/cm^3}=18.08 cm^3$

2) Mass of metal , water and pycnometer = 56.83 g

Mass of metal,M' = 9.5 g

Mass of water when metal and water are together ,m''= 56.83 g - M'- M

56.83 g - 9.5 g - 27.60 g = 19.7 g

Volume of water when metal and water are together = v

$v=\frac{m''}{d}=\frac{19.7 g}{0.9982 g/cm^3}=19.73 cm^3$

Density of metal = d'

Volume of metal = v' = $\frac{M'}{d'}$

Difference in volume will give volume of metal ingot.

v' = v - V

$v'=19.73 cm^3-18.08 cm^3=$

$v'=1.65 cm^3$

Since volume cannot be in negative .

Density of the metal =d'

= $d'=\frac{M'}{v'}=\frac{9.5 g}{1.65 cm^3}=5.758 g/cm^3$

5 0

3 years ago