Select the correct answer from each drop-down menu. Brenda is a crime scene investigator. She believes there is blood at the scene of the crime but needs to confirm her initial findings. Which of the
following techniques should she use to find probable evidence of blood and confirm that it is indeed blood?
Brenda should uses a
to confirm that it is indeed blood.
test to find probable evidence of blood. If she does so, she should use a
✓ test

Which best represents the law of conservation of mass ?

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

An object that weighs 75n is pulled on a horizontal surface by a horizontal pull of 50 n to the right. the friction force on this object is 30 n to the left. what is the acceleration of the object?