Two forces 9f 6n and 8n are acting at angle of 30 find the resultant force​

In the first law of thermodynamics, triangle e=q-w, what does q stand for

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

If a car is traveling on the highway at a constant velocity, the force that pushes the car forward must be a. equal to the weight of the car. b. less than the force of friction exerted upon the car. c. equal to the force of friction exerted upon the car. d. greater than the weight of the car.