From the brightness of the light of course. If the brightness is increasing it means the the light source is approaching and if the brightness is decreasing it means the light source is leaving.
Answer: a. increased energy efficiency
Explanation:
The answer to number four is A
Answer:
The question is incomplete as the boxes of description is not given but the missing part is attached in the image-
Brain and spinal cord have a membranous covering made up of three layers, altogether known as meninges. These 3 layers are known as the Dura mater follows by the arachnoid mater and inner layer is the pia mater.
The description of the different layers are as follows-
1. Dura mater is the most superficial layer of the meninges. The superior sagittal sinus is present within this dura mater.
It creates tough inward folds that distinguished the cerebral hemispheres. Lines the inner side of the cranium in the skull.
2. Arachnoid mater is the middle layer present under the dura mater layer that surrounds the subarachnoid space. This layer is present Immediately deep to the subdural space.
3. Pia mater makes the deepest layer that follows the contours of the surface of the brain.
polarity of a molecule deals with the presence of net charges and partial charges. this has nothing to do with its symmetry which is determined by the molecule's structure
