3 years ago

The law of ____ states that energy in a system can change forms but can never be created or destroyed.

Physics

2 answers:

irga5000 [103]3 years ago

8 0

The law of (Thermodynamics)

MissTica3 years ago

8 0

Answer:

The Law of Conversation

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A sample has a density of 30 g/ml. there is 60 ml of this substance.how much does it weigh?

aleksandrvk [35]

If each mL has 30 grams of the substance in it, then 60 mL have 1800 grams of mass in them. the weight of 1,800 grams of mass on Earth is (1.8 kg) x (9.8 m/s^2) = 17.6 newtons.

3 0

4 years ago

Polarized light is incident on three polarizing filters in a row. The initial intensity of the light is 4 W/m^2. The first filte

DiKsa [7]

Answer:

45°

Explanation:

I = Polarized light after 3 filter = 0.5 W/m²

$I_0$ = Initial light intensity = 4 W/m²

The intensity of polarized light is given by

$I=I_0cos^2Acos^245cos^245\\\Rightarrow A=cos^{-1}\sqrt{\dfrac{I}{I_0cos^245cos^245}}\\\Rightarrow A=cos^{-1}\sqrt{\dfrac{0.5}{4\times cos^245\times cos^245}}\\\Rightarrow A=45^{\circ}$