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fredd [130]
2 years ago
13

Which element is MOST LIKELY to be dull? carbon aluminum mercury sodium

Physics
1 answer:
antoniya [11.8K]2 years ago
3 0

as a blade? murcury because it stays liquid at room temp. it would be a puddle with a hanfle which is like... really dull

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A scientific law is a statement of fact that describes an action or set of actions. Laws are accepted as fact because they are a
denis23 [38]

Answer: Newton’s law of universal gravitation

Explanation: Apèx

7 0
3 years ago
If the Universe was born at the Big Bang, what existed before then?​
Aleonysh [2.5K]
<h2>Answer:</h2>

<em>Hey, </em>

<h3><u>QUESTION)</u></h3>

This is a complicated question that would be debated by many physicists. How to answer this question when we are struggling with the genesis of the universe? Many theories on the origin of the universe have been put forward, but the Bing Bang is probably, or at least to date, the most likely theory. If today the universe is expanding, some astronomers hypothesise that before the Bing Bang the universe already existed but that it was condensing, according to this hypothesis the Bing Bang would correspond to the limit point of compression of the universe.  

But if we remain in the traditional theory the Bing Bang is at the origin of all the matter we know, as well as light. Before the Bing Bang, in other words before the universe, there was NOTHING.

8 0
3 years ago
A load of 800 N is lifted using a block and tackle having 5 pulleys. If the applied effort is 200 N, calculate
ser-zykov [4K]

Explanation:

Load=800N

Effort=200N

1. Mechanical Advantage = LOAD/EFFORT

= 800N/200N

= 4

2 Velocity Ratio = no. Of pulleys =5

3. Efficiency = Mechanical advantage / velocity ratio × 100%

= (4/5)×100%

=80%

4. output work= load×load distance

= 800N × 5m

= 4 × 1000J

5. Efficiency = (output work/input work) ×100%

Or, 80% = (4000J/input work) ×100%

Or, 80%/100% = 4000J/inputwork

Or, 4/5 = 4000J/inputwork

Or, input work =4000J × 5/4

Input work = 5×1000J

I hope it helped! ;-)

8 0
3 years ago
Read 2 more answers
The power generated by the engine was just 2.984 KW. How long would this engine have to run to produce 3.60 × 104 J of work?
tangare [24]

Answer:

Time = 12.06 seconds

Explanation:

Given the following data;

Power = 2.984 KW = 2984 Watts

Workdone = 3.60 × 10^4 J = 36000 J

To find the time;

Power = workdone/time

Time = workdone/power

Time = 36000/2984

Time = 12.06 seconds

Therefore, the engine would have to run for 12.06 seconds.

8 0
3 years ago
A) What is the position of the Earth when the Sun rises to its lowest Midday position in the sky in the Northern Hemisphere? b )
Sholpan [36]

Answer:

A) In northern hemisphere, position of the earth is towards to the sun.

B) In Southern hemisphere, position is away from the sun.

Explanation:

A) In the month of June in the northern hemisphere, the axis of the earth is usually tilted at an angle of about 23.5°. During this period, it revolves around round the sun with one complete revolution of 365 days. Now for the duration of this rotation, the position of the earth is that it leans into the sun when the Sun rises to its lowest Midday position in the sky .

B) For the southern hemisphere, it undergoes the same rotation as in the northern hemisphere. Just that it is usually in the month of December and the position of the earth is that it leans away from the sun when the Sun rises to its lowest Midday position in the sky .

3 0
3 years ago
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