What are the uses of these two types of thermometer and what are the advantages and disadvantages of these two types of thermometer 1- The Hand-held IR thermometer and - 2-Fever detection cameras thermometer?

Classify each possible hypothesis about a medicinal aloe vera plant as falsifiable or non-falsifiable. aloe vera gel is the best natural skin moisturizer. aloe vera gel can heal wounds by boosting cell renewal. aloe vera juice tastes better than carrot juice. drinking aloe juice can reduce the risk of lung cancer.

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

What sort of waves exhibit the doppler effect?