An object was launched with an initial velocity of 12 m/sfat an angle of 21 from the horizontal, assuming no air resistance, what was the horizontal displacement of the object?

Along, straight wire with 3.0 a current flowing through it produces magnetic field strength 1.0 t at its surface. if the wire has a radius r, where within the wire is the field strength equal to 36.0% of the field strength at the surface of the wire? assume that the current density is uniform throughout the wire

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)