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3 years ago

Use the drop-down menus to complete the paragraph,

Physics

2 answers:

tino4ka555 [31]3 years ago

5 0

PLS MARK ME BRAINLIEST!!

Answer:

1. Decreases

2. magma chamber

3. pipe

4. vent

Explanation:

I just took the test :)

zlopas [31]3 years ago

4 0

Answer:

As magma rises, pressure Decreases , causing dissolved gases to expand and form bubbles. The size of the bubbles increases, exerting a lot of force. The force of the expanding gases pushes the magma from the Magma chamber up through the Pipe . Molten rock and gas explode through the Vent , which is at or near the top of the volcano.

Explanation:

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Identify the type of chemical reaction that is described.

Anastasy [175]

Water breaks down into hydrogen and oxygen: It is a decomposition reaction as a single substance decomposes to give two products.

$H_2O \rightarrow H_2 +\frac {1}{2}O_2$

Leaves make starch using chlorophyll and carbon dioxide: Synthesis reaction: as the synthesis reaction involves two or more than two reactants which join together to result into a single main product along with the formation of simple by products.

$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$

Food burns in oxygen gas and releases a lot of energy: Combustion: Combustion process involves the use of oxygen to give products along with release of energy.

$C_6H_{12}O_6 + 6O_2\rightarrow 6CO_2 + 6H_2O$

Adding vinegar (acid) to baking soda (alkali) gives a product that is neither acidic nor alkaline: Neutralization: acetic acid in vinegar reacts with soda (base) to give salt (neutral) and .

$CH_3COOH + NaHCO_3\rightarrow CH_3COONa +H_2O + CO_2$

6 0

4 years ago

Comic strip hero superman meets an asteroid in outer space and hurls it at 100m/s. he has a mass of "m". The astroid has a mass

Katyanochek1 [597]

Answer:

v = -10⁵ m/s

Explanation:

given,

speed of asteroid,v' = 100 m/s

mass of superman = m

mass of asteroid,M = 1000 m

recoil velocity of superman,v= ?

using conservation of momentum.

m u + M u' = m v + M v'

initial velocity of asteroid and superman is equal to zero

0 + 0 = m v + 1000 m x 100

m v = -100000 m

v = -10⁵ m/s

superman's velocity after throwing the asteroid is equal to v = -10⁵ m/s

8 0

4 years ago

The radar system of a navy cruiser transmits at a wavelength of 1.4 cm, from a circular antenna with a diameter of 2.7 m. At a r

Goshia [24]

Answer:

Distance will be 49.34 m

Explanation:

We have given wavelength $\lambda =1.4cm =0.014m$

Diameter of the antenna d = 2.7 m

Range L = 7.8 km = 7800 m

We have to find the smallest distance hat two speedboats can be from each other and still be resolved as two separate objects D

We know that distance is given by $D=\frac{L1.22\lambda }{d}=\frac{7800\times 1.22\times 0.014}{2.7}=49.3422m$

So distance D will be 49.34 m

4 0

3 years ago

A student is told to use 20.0 g of sodium chloride to make an aqueous solution that has a concentration of 10.0 g/L (grams of so

Stells [14]

Answer:

she should add solute to the solvent

Explanation:

Given data :

Mass of the sodium chloride, = 20.0 g

Concentration of the solution = 10 g/L

Volume of 20.0 g of sodium chloride = 7.50 mL

Now, from the concentration, we can conclude that for 10 g of sodium chloride volume of the solution is 1 L

thus, for 20 g of sodium chloride volume of the solution is 2 L or 2000 mL

also,

Volume of solution = Volume of solute(sodium chloride) + volume of solvent (water)

thus,

2000 mL = 7.5 mL + volume of solvent (water)

volume of water = (2000 - 7.5) mL

volume of water = 1992.5 mL

volume of water = 199.25 L ≈ 199 L

6 0

3 years ago

Read 2 more answers

To withstand ‘g-forces’ of up to 10 g’s, caused by suddenly pulling out of a steep dive, fighter jet pilots train on a ‘human ce

Marina86 [1]

Answer:

34.292 m/s

Explanation:

When plane dives the gravitational acceleration becomes 10 times extra i-e

acceleration a = g= 10g's=10 ×9.8= 98 m/sec2

radius of dive circle = 12 m

v= speed= ?

Using

$a= \frac{v^{2} }{r}$

==> $v^{2}$ = a × r = 98 × 12 = 1176 $(\frac{m}{s}) ^{2}$

==> v= $\sqrt{1176(\frac{m}{s} )^{2} }$

==> v= 34.292 m/s

4 0

3 years ago