A man walks 8km north and then 5km in t thr direction of 60°east of north find the distance from its starting point

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

In a good thermo flask the main cause of heat loss is

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up