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skad [1K]
3 years ago
5

What two measurements are necessary for calculating velocity?

Physics
1 answer:
Mademuasel [1]3 years ago
5 0

Answer:

Speed and velocity are both measured using the same units.

Explanation:Speed and velocity are both measured using the same units. The SI unit of distance and displacement is the meter. The SI unit of time is the second. The SI unit of speed and velocity is the ratio of two — the meter per second .

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Animals need oxygen to complete the many chemical reactions taking place in the body. An animal inhales oxygen and exhales _____
mezya [45]
Carbon dioxide and nitrogen
5 0
3 years ago
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What is the formula of the compound between calcium and sulfur that has the percent composition 55.6?
Yanka [14]

CaS is the empirical formula of the compound between calcium and sulphur that has the percent composition 55.6.

When percentages are given, we take a total mass of 100 grams.

Therefore the mass of each element is equal to the percentage given.

Mass of Ca = 55.6 g (given) of

S Mass = 44.4 g (100 - 55.6 = 44.4)

Step 1: Convert the given mass to moles.

moles Ca = given mass Ca / molar mass Ca

moles = 55.6 / 40 = 1.39 moles

mol S = specific mass S / molar mass S

mol = 44.4 / 32 = 1.39 mol

Step 2: Divide the molar ratio of each molar value by the smallest number of moles calculated.

For Ca = 1.39 / 1.39 = 1

For S = 1.39 / 1.39 = 1

The ratio of Ca : S = 1:1

Hence the empirical formula of the given compound will be CaS.

Learn more about empirical formula here : brainly.com/question/1496676

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8 0
1 year ago
Does being creative in doing science mean that a scientist should make things up ? Why ?
In-s [12.5K]
No. Science is all about facts and experiments. Making stuff up would go against that, and wouldn't be science. 
7 0
3 years ago
Read 2 more answers
A 1000-kg car is driving toward the north along a straight horizontal road at a speed of 20.0 m/s. The driver applies the brakes
Fofino [41]

Answer:

Force will be acting southward and the magnitude of force will be 1000 N

Explanation:

given,

mass of car = 1000 Kg

initial speed of the car (u) = 20 m/s

final speed of the car (v) = 0 m/s

distance to stop the car = 200 m

using equation of motion

v² = u² + 2 a s

0 = 20² + 2 x a x 200

400 a = -400

a = -1 m/s²

Now, we know

Force = mass x acceleration

F = 1000 x -1

F = -1000 N

- ve sign of force represent force will be acting in the opposite direction of motion.

Force will be acting southward and the magnitude of force will be 1000 N

6 0
3 years ago
LA 7.0 liter balloon at room temperature (22°C) contains hydrogen gas. If the
coldgirl [10]

Answer:

Explanation: Convert temperatures to Kelvins.

22 C = 295 K

30 C = 303 K

According to Charles' law:

V1 / T1 = V2 / T2

7 / 295 = V2 / 303

V2 = (303 * 7) / 295

V2 = 7.18983 Litres which rounds to 7.19 litres.

5 0
3 years ago
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