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Anna35 [415]
2 years ago
11

Which can a drop of liquid mercury can be described as?

Physics
2 answers:
Lorico [155]2 years ago
7 0

Answer:

a pure substance and an element

Explanation:

i just did on edgen

Sophie [7]2 years ago
3 0
Option D) A drop of mercury is both  a pure substance and and element.
Happy to assist you !
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A car has a mass of 8000 kg and a kinetic energy of 24,000 J. What is its<br> speed?
Liula [17]

Answer:

30 mph

Explanation:

8 0
2 years ago
If this decay has half-life of 2 years, how many years would it take for 10.8 g Protactinium-231 to remain given an initial mass
sergij07 [2.7K]

Answer:

Time = 6 years

Explanation:

First, we will calculate the no. of half life periods required to reduce the mass of Protactinium to the given value:

m' = \frac{m}{2^{n} } \\\\2^n = \frac{m}{m'}

where,

n = no. of half-life periods = ?

m = initial mass = 86.3 g

m' = remaining mass = 10.8 g

Therefore,

2^n = \frac{86.3\ g}{10.8\ g}\\\\2^n = 8\\2^n = 2^3

Since the bases are the same. Therefore equating powers:

n = 3

Now we calculate the time:

Time = (n)(Half-Life)\\Time =(3)(2\ years)

<u>Time = 6 years</u>

3 0
3 years ago
A magnet is located above circular current. What is the direction of the magnetic force on the magnet
Jobisdone [24]

The magnet is attracted to the ring since the north pole of the current loop is above the ring and the south pole is below the ring.

3 0
3 years ago
The practice of science can answer only scientific questions. And scientific
MakcuM [25]

Answer:

a

Explanation:

5 0
2 years ago
Read 2 more answers
A wagon, initially traveling at a constant 8.2 m/s, starts going down a hill that creates an acceleration of 9.0 m/s2. What is t
pashok25 [27]

Answer:

67.6m/s

Explanation:

Given parameters:

Initial velocity  = 8.2m/s

Acceleration  = 9.0m/s²

Time  = 6.6s

Unknown:

Final velocity  = ?

Solution:

To solve this problem, we use the expression below:

     Acceleration  = \frac{v - u }{t}

v is the final velocity

u is the initial velocity

 t is the time taken

    9  = \frac{v - 8.2}{6.6}  

    v - 8.2  = 59.4

    v  = 59.4 + 8.2 = 67.6m/s

8 0
2 years ago
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