A block of mass 9.5kg rests on a slope an angle of 23.0∘ relative to the horizontal. What is the size of the contact force normal to the slope, in Newtons?

Use a gravitational acceleration value of g = 9.8m/s^2.

Jack is falling down the hill at a speed of 12 m/s. If Jack has a mass of 45 kg, what is his kinetic energy?

Which represents a type of mechanical wave? A. gamma rays B. infrared light C. telemetry waves D. water waves

How much tension must a cable withstand if it is used to accelerate a 1800-kg car vertically upward at 0.80 m/s2?

What are four earth spheres that contain water and identify one way that water is stored in each

What happens to an electron when energy is added?

Why does Alpha Centauri appear to be yellow-white?

In order to determine speed, you must know

Which of the statements best describes the relationship between the surface of an object and the amount of friction it produces? A.) The smoother the surface of an object, the more friction it will produce. B.

Laboratory measurements show hydrogen produces a spectral line at a wavelength of 486.1 nanometers (nm). A particular star's spectrum shows the same hydrogen line at a wavelength of 486.0 nm. What can we conclude

Esimate and add to the nearest thousand 6,521+1,063+901