Find the de broglie wavelength of a ball of mass 0.20 kg just before it strikes the earth after being |dropped from a building 50 m tall. important: step by step *typed* format preferred. if hand written, write clearly and legibly. be sure answer is correct.

Wavelength of the ball is

Explanation:

It is given that,

Mass of the ball, m = 0.2 kg

It strikes the Earth after being dropped from a building of 50 m tall, h = 50 m

In this time, the potential energy is converted to kinetic energy. On applying the conservation of energy as :

.............(1)

The De-broglie wavelength of the ball is given by :

Hence, this is the required solution.

8 meters above the spring

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50