8. The velocity of a car reduces from 30 km/h to 5 km/h as the car approaches a stop sign. Is this an example of positive or negative acceleration? (circle the correct answer)

A wave is incident on the surface of a mirror at an angle of 30° with the normal. At what angle will the outgoing wave reflect?

A certain chemical reaction experiences a 7.50 x 10-7 kilogram loss in mass. If this mass were to be totally converted to energy, what would be the magnitude of that energy.

A sound wave has a wavelength of 0.0325 m and a frequency of 9380 Hz. What is the speed of the wave? (Unit = m/s)

What is a concussion

A particle is moving along the x-axis with velocity v (t) = sin2t. At time t = pi/2 it has position x = 3. Find the total distance, s traveled by this particle on the interval 0 < = t < = pi.

Water, with a density of rho = 1145 kg/m 3, flows in a horizontal pipe. In one segment of the pipe, the flow speed is v 1 = 7.33 m/s. In a second segment, the flow speed is v 2 = 1.57 m/s.

What does the color of a star determine

Scientific cosmology Choose one: A. investigates the overall structure and history of the Universe. B. pertains to legends and verbal history about the beginnings of the Universe. C. proves the Big Bang theory. D.

Which statement best describes longitudinal waves? A) Particles of the wave medium move perpendicular to the direction of propagation of the wave. B) Longitudinal waves do not require a material medium for propagation.

Three-fourths of the Earth's surface is covered by water. The water cycle includes these water sources evaporating and returning to Earth as rain and snow.