What is the net force on a car if the force of friction is 15 n and the forward force due to the engine is 20 n?
a. 5 n backwards
b. 5 n forwards
c. 35 n backwards
d. 35 n forwards

Not all tiles will be usedidentify the element present in each star based on the gaps observed in wavelengths of its light refer to this table containing absorption wavelengths (in nm) of several different elements the table ishelium 447, 502 ,587 ,668carbon 427 ,515, 600 ,678sulfur 425, 565, 639, 675xenon 484, 590, 687calcium 429 ,527, 593, 645silver 421 ,521, 662

Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers total displacement?

List and describe three ways that humans can change ecosystems and three ways that humans can protect ecosystems.