The value of a timber forest after t years is v(t) = 360 t − 30t (for 0 ≤ t ≤ 50). Find when its value is maximized. T =.

The de broglie relation λ=h/p can be rewritten in terms of the wave number k as p=kℏ. recall that wave number is defined by k=2π/λ. using the fact that λ=v/f, find the wave numbers k1 and k2 corresponding to frequencies f1 and f2. express your answer as two expressions

In the image, the arrow is pointing to a celestial object. which attribute disqualifies the object from being a planet?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.