Dipper effect of an oncoming train get louder as it approaches and sound diminishes as it goes away sound traveling
Dark matter is called dark because it does not appear to interact with the electromagnetic field, which means it does not absorb, reflect or emit electromagnetic radiation, and is therefore difficult to detect.
...a nerve. These send signals from the body to the brain and vice versa.
Answer:
Water striders have strong intermolecular forces on their legs which enables them to run on water.
Explanation:
The forces acting on a massless object (spring, hook, string or wire, if considered massless) will always balance. Balanced forces acting on an object cause it to compress or stretch. The forces acting on a mass will never cancel.
