Atomic and Nuclear Physics Answers

ABOY STANDING AN THE GRAND THRAWS A BALL STRAIGHT UP WITH AN INITIAL VELOCITY OF 12M/S.

A,WHAT IS THE MAXIMUM HEIGHT THE BALL REACHES?

B,HOW LONG DOES IT TAKE TO REACH THIS HEIGHT?

After sledging down a hill onto a frozen lake, a boy and a girl are sitting at rest. The combined mass of the kids and the sled is 210 kg. The 70 kg boy jumps north at 6.5 m/s and the 50 kg girl jumps to the south at 8.1 m/s.

How fast and in what direction will the sled be traveling?

In the synthesis of Mo nitrides, there were three synthesis variables: b₁ (the heating rate from 350-450^oC, b₂ (the heating rate from 450-700^oC), and space velocity, SV (in moles/hr of total gas flowrate divided by moles of Mo metal in the prepared catalyst).

A) (1 pt.) Which variable correlated with increasing surface area?

B) (1 pt.) Why does the answer to A make sense?

C) (4 pts.) If the bubbling gas in a porous gel collapse, then the material is called a ___________; if the pores remain, then it is called an _____________. The gas "solvent" commonly used to extract template molecules is ______________________ if it is above its ___________________.

D) (2 pts.) What did catalytic activity for pyridine hydrodenitrogenation (HDN) correlate with?

An RLC circuit is connected to 60hz, 240volts a.c supply. If R=50ohms, C=100uf and M=0.12h. Calculate the power used in circuit

 A householder is worried about the radiation emitted by the granite worktop in his kitchen.

1 kg of granite has an activity of 1250 Bq. The kitchen worktop has a mass of 180 kg.

Calculate the activity of the kitchen worktop in Bq.

Which of the following has the order of increasing energy

(a) 1D2 , 3D2, 3F2  (b) 3F2 3D2, 1D2 (c) 1D2 , 3F2 , 3D2 (d) 3D2, 3F2, 1D2

 Find the angle between vectors l * and j* in 2P3/2 state of one electron atom.

Calculate the wavelength of the 2s → 2p transition in Li. The quantum defect for Li are 𝛿𝑠= 0.412 and 𝛿𝑝= 0.041. R= 109737.32 cm-1

A Juniper wood log with a weight density of about 35 pounds/ft³ and a volume of 2 ft³ is submerged in water. What is the buoyant force on it? 

[The weight density of water is 62.4lb/ft³.]

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How much heat is needed to raise 1 kg of aluminum from 10 C to 80 C

Explain What formula you have used to determine the charge to mass ratio of the electron and what is

the origin of it?

Explain Why do we calculate the e/m ratio of an electron?