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vichka [17]
3 years ago
10

How you can use physical properties to compare substances.

Biology
1 answer:
Alex3 years ago
8 0
To proceed scientifically, you could measure several properties of the unknown liquid and compare them with the properties of known substances. You might observe and measure such properties as color, odor, texture, density, boiling point, and freezing point.
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3 years ago
So, what is actually produced during the light reaction? Do you know the chemical<br> equation?
Alex_Xolod [135]

Answer:

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7 0
3 years ago
How much force would is required to stop a 1200kg car in 2 seconds if the car is traveling at 22 m/s
Shalnov [3]
Force required = F = ?

mass of the car = m = 1200 kg

initial velocity of the car = Vi = 10 m/sec

final velocity of the car = 0

time required to stop the car = t = 20 sec

Using Newton`s 2nd law of motion;

F = ma ………………………(1)

as a = Vf - Vi / t , put this value in equation (1)

F = m ( Vf - Vi /t ) ………………(2)

F = 1200 ( 0 - 10 /20) = - 600 N

here Negative sign shows that external force is acting in opposite direction of the motion to bring it to rest.

we can also calculate this force by using the relation

Rate of change of momentum = net force acting on the object …………(3)

m Vf - m Vi / t = net force acting on the object

m (Vf - Vi / t) = F

1200 ( 0 - 10 /20) = - 600 N = F

so, net force acting on the object =F = - 600 N

5 0
3 years ago
A group of sailors on board a ship suffered from bleeding gums. What deficiency disease could they have suffered from? Suggest 2
UkoKoshka [18]
Vitamin deficiencies: Vitamin K and Vitamin C
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3 0
3 years ago
so I’m a 5’1 teenage girl, (almost 15) and I️ weigh 118. Is this a healthy weight for my size or am I overweight?
Lera25 [3.4K]

This info provided seems to be that you are of a healthy weight

4 0
3 years ago
Read 2 more answers
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