two forces, = (-6.00î – 4.00j) n (-3.00î + 7.00j) n, act on a particle of mass 2.00 kg that is initially at rest at coordinates (-2.00 m, +4.00 m). (a) what are the components of the particle's velocity at t = 10.0 s? (b) in what direction is the particle moving at i = 10.0 s? (c) what displacement does the particle undergo during the first 10.0 s? (d) what are the coordinates of the particle at i = 10.0 s?

Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity

The base of a 50-meter tower is at the origin; the base of a 50-meter tree is at (0, 50, 0). the ground is flat and the z-axis points upward. the following parametric equations describe the motion of six projectiles each launched at time t = 0 in seconds. (i) r (t) = (50 + t2)k (ii) r (t) = 2t2 j + 2t2k (iii) r (t) = 50 i + 50 j + (50 − t2)k (iv) r (t) = 2t j + (50 − t2)k (v) r (t) = (50 − 2t) i + 2t j + (50 − t)k (vi) r (t) = t i + t j + tk (a) which projectile is launched from the top of the tower and goes downward? at time t = , the projectile hits the ground at point (x, y, z) = . (b) which projectile hits the top of the tree?

Acircuit contain a 5-ohm,a3-ohm,and an 8-ohm resistor in series. what is the total resistance of the circuit