Your friend says you can't use the equation x = vo t + 1/2a( t )^2 to find the horizontal displacement of a horizontal projectile with a constant velocity because you don't know the acceleration in the horizontal directon. Is your friend correct? Why or why not? 1. My friend is incorrect. The acceleration is always -9.8 m/s^2
2. My friend is correct. A different equation must be used to find x.
3. My friend is incorrect The horizontal acceleration is the same as horizontal velocity. 4. My friend is incorrect. If the velocity is constant, then the horizontal acceleration is zero.

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

What are the dimensions of the cross section that passes through the points a, f, g, and d?