Butter melts when you heat it on a pan on the stove.is this a chemical changes or physical changes?
Answers
Answer:
No chemical bonds are broken or formed in melting butter, so it is not a chemical change. The melting process is only a physical change, the change of state from solid to liquid.
Answer:
I think it's physical change because originally it was a solid but now it's a liquid and its chemical properties have not changed only shape
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The slope of a line on a distance-time graph is
A hollow plastic sphere is held below the surface of a fresh-water lake by a cord anchored to the bottom of the lake. The sphere has a volume of 0.650 cubic meters and the tension in the cord is 900 N. a) Calculate the buoyant force exerted by the water on the sphere. b) what is the mass of the sphere? c) the cord breaks and the sphere rises to the surface. When the sphere comes to rest, what fraction of its volume will be submerged?
Farmer Wilcox wants to reduce the wind velocity near his farm. He should _____.add dead leaves to his fieldscut down trees surrounding his fieldsplant trees around the perimeter of his fieldsirrigate his fields during dry seasons and droughts
Answers
(voltage)² / (resistance) .
You can see that resistance is in the denominator of the fraction,
so larger resistances dissipate less power, and smaller resistances
dissipate more power.
Here's an easy way to remember it:
-- Connecting a piece of rubber (high resistance) across the terminals of a battery
uses very little power from the battery.
-- Laying a piece of wire (low resistance) across the terminals of a battery
may draw so much power from the battery that the wire melts.
Since the voltage across both bulbs is expected to be the same, the bulb
designed to dissipate 60 watts has higher resistance than the one designed
to dissipate 100 watts.
Answers
Answer:
Aluminium or Iron or any metal really
Explanation:
I did Gradpoint :)
Answers
5211.6 Car can fit in a football field.
What is the dimension of football pitch?
The recommended dimensions of a football pitch are 105m x 68m, which is 7,140 sq meters.
The average length of a car is around 14.7 feet.
i.e. 1.37 sq meters
By dividing the football pitch by length of car,
= 7140/ 1.37
= 5211.6 Car
With no gaps of course.
Therefore,
In a football field 5211.6 cars can be fit without no gap.
Learn more about Football pitch here:
#SPJ2
jeep starts from it the
starts from it the state of rest. If its
velocity 60m/s and its take 5 minute: what is the accelera
ution of the jeep
the distanced travelled by
the jeep:
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- Initial velocity,u = 0 m/s
- Final velocity,v = 60 m/s
- Time taken,t = 5 min = 5 × 60 sec = 300 seconds
Calculate the acceleration ( a ) and distance (s ) covered by the jeep.
We will first calculate the acceleration of the jeep.
CASE 1 :
By Using first equation of motion ,
Thus,the acceleration of the jeep is 50 m/s².
Now, Let us calculate the distance travelled by the jeep.
CASE 2 :
By Using third equation of motion ,
Thus,the distance covered by the jeep is 36 m .
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