If a car travels 400m in 2o seconds how fast is it going?

Each metal is illuminated with 400 nm (3.10 eV) light. Rank the metals on the basis of the maximum kinetic energy of the emitted electrons. (If no electrons are emitted from a metal, the maximum kinetic energy is zero, so rank that metal as smallest.

The thread around a screw is a lever.

Two grocery carts have the same initial total momentum. The two carts collide, and now cart B has a greater final velocity.

What is the result of (6.2 * 104) x (3.3 * 102) expressed in scientific notation? 2.0 * 108 2.0 * 107 2.0 * 106 2.0 * 102

An astronaut is being tested in a centrifuge. The centrifuge has a radius of 5.20 m and, in starting, rotates according to θ = 0.170t2, where t is in seconds and θ is in radians. When t = 4.

A light plane must reach a speed of 33m/s for takeoff. how long a runway is needed if the the acceleration is 3.0m/s^2

How do astronomers learn about the internal structure and evolution of stars? How does a new star form? What causes a supernova to occur? Explain. Is the lifetime of a massive star shorter or longer than a star like the Sun? Why?

Calculate the density of water at 22.3 degrees celsius

The elements with the largest atomic radii are found in the

Within a DNA molecule, which two nitrogen bases are correctly paired with one another? A. cytosine (C) and uracil (U) B. adenine (A) and thymine (T) C. adenine (A) and guanine (G) D. cytosine (C) and thymine (T)