Which of the following is the correct SI unit measuring amount of material contained in a solid sphere

Kilograms

Tons

Ounces

Pounds

Explain why the bright spectral lines of light emitted from the atoms of an element are unique to that element

Why can't sound be heard in space?

Water leaves a fireman's hose (held near the ground) with an initial velocity v0=19.5v0=19.5 m/s at an angle θθ = 34 degrees above the horizontal. Assume the water acts as a projectile that moves without air resistance.

If a cart of 2 kg mass has a force of 8 newtons exerted on it, what is its acceleration?

You swing a hammer down onto a wedge. Which of the following choices best describes the input and output forces? A. The wedge exerts a greater output force than the input force supplied, and it applies the force over a greater distance. B.

A crate of fruit with a mass of 30.5kg and a specific heat capacity of 3800J / (kg? K) slides 7.70m down a ramp inclined at an angle of 36.2degrees below the horizontal. Part A If the crate was at rest at the top of the incline and has a speed of 2.

A golf club is swung and strikes a golf ball with a force of 12.2 N. The golf ball accelerates at 265.2 m/s2 (wow) Determine the mass of the golf ball.

What kind of waves are lasers worked by?

If the forces acting upon an object are balanced, then an object must a) be moving. b) be accelerating. c) be beginning to slow down. d) be moving at a constant velocity.

Calculate the kinetic energy of a 10kg cart traveling at 4 m/s?