A clinical technician finds that the activity of a sodium-24 sample is 480 cpm. What will be the activity of the sample 75 h later if the half-life of sodium-24 is 15 h? What is the half-life of thallium-206 if the activity of a sample drops from 2000 cpm to 250 cpm in 21.0 min?

Q: In a given railroad of the Philippine National Railways that runs from Caloocan City to Legaspi City...

A: Initial length, Lo = 15.0 m Initial temperature, T = 32°C Final temperature, T'  = 42.5°C

Q: You want to design a spy satellite to photograph licenseplate numbers. Assuming it is necessary to r...

A: Here, θ=1.22λDD=1.22λθ=1.22λst=1.22λts

Q: John walks 1.00 km north, then turns right and walks 1.00 km east. His speed is 1.50 m/s during the ...

A: The distance covered towards north, s1=1.0 km=1.0×103 m   The distance covered towards east, s2=1.0 ...

Q: . A stone is tied to a 3 meter long rope and rotated in a vertical circle.What is the minimum speed,...

A: Given : Length of a rope (r) = 3 m

Q: a) What is factor of safety (F.S.) and state two application areas. b) Under shear stress studies, e...

A: Solution: The question here has discussed about the FOS and uses of it on the practical application.

Q: 3. In Fig. P-537/p. 132, determine the value of P just sufficient to start the 10° wedge under the 4...

A: Given,  Mass, m=400 lb.

Q: A positive particle of charge 1.0 C accelerates in a uniform electric field of 100 V/m. The particle...

A: Given : Q = 1 C E = 100 V/m V1 = 50 V V2 = 10 V ∆V = (10-50) = -40 V

Q: choose the correct answer

A: Given : Area = 10 mm x 10 mm = 100 mm2 = 0.0001 m2 Distance (d) = 2 mm = 0.002 m Capacitance (C) = 1...

Q: A particle with charge 7.26 * 10-8 C is moving in a region where there is a uniform 0.650 T magnetic...

A: Velocity can be written as follows: v→=-1.68i^-3.11j^+5.85k^×104 m/s Magnetic field can be written a...

Q: Suppose that two resistors connected in parallel with resistances R1R1 and R2R2 are measured in ohms...

A: Concept Differentiate the given equation with respect to t in the following way. In this case, The...

Q: What diameter must a copper wire have if its resistance is to be the same as that of an equal length...

A:

Q: What is the angular magnification of a telescope that has a 100 cm focal length objective and a 2.50...

A: The angular magnification is given by M=-fofe

Q: An object, 4 cm high, is 10 cm in front of a thin convex lens of focal length +12 cm.Determine the p...

A: construction of the given apparatus is given as follows:

Q: A particle passes through a mass spectrometer as illustrated in the figure below. The electric field...

A: Given The magnitude of the electric field between the plates is E=8360 V/m. The magnitude of the ma...

Q: Two identical sinusoldal waves with wavelengths of 2.5 m travel in the same direction with the same ...

A: Formula of path-difference of distractive interference is as follows: ∆x=m+12λ                      ...

Q: Question 4 : A mass performed 3 diffesent displacenent defined following expressions, respectively. ...

A:

Q: Three moles of helium gas (molar mass M = 4.00 g/mol) are in a rigid container that keeps the volume...

A:

Q: The density of gold is 19.3 g>cm3. What is this value in kilograms per cubic meter?

A: density = 19.3 g/cm3

Q: (a) At what speed is the momentum of a particle twice as great as the result obtained from the nonre...

A: a. Let p be the non-relativistic momentum and p' be the relativistic momentum of the particle. Then ...

Q: How much time does it take a train to increases its speed from 6.0 m/s to 36 m/s over a distance of ...

A: Solution: Given that initial velocity u = 6 m/s final velocity v = 36 m/s distance s = 120 m  

Q: Suppose a feather appears green but has no green pigment. Explain in terms of diffraction.

A: To find out why would a feather appear green even if it doesn't have any green pigment.

Q: What is particle-wave duality?

A: Wave-particle duality is the concept in quantum mechanics that every particle or quantum entity may ...

Q: Laser light of wavelength 500.0 nm illuminates two identical slits, producing an interference patter...

A:

Q: Question-3 An aircraft flying at a height of 800m with uniform horizontal velocity of 360km/hr relea...

A: Height,  h =800m  velocity, u =360  km/h = 100 m/s

Q: A plate in the shape  of a triangle is submerged vertically and the base which is 3 ft long is in th...

A: The base of the triangle is b=3 ft. The pressure against the face of the plate is f=50w

Q: (a) How wide is a single slit that produces its first minimum for 633-nm light at an angle of 28.0º ...

A: Given: The wavelength of light is λ=633 nm. The angle is θ=28°.   (a) The expression to calculate ...

Q: The weight of an astronaut plus his space suit on the Moon is only 250 N. How much do they weigh on ...

A: Given data The weight on the moon is Wmoon=250 N   The weight of an astronaut plus his spacesuit on ...

Nuclear Reactions

Nuclear reactions are processes in which the fundamental characteristics of a nucleus changes. They change into a completely different nucleus. These processes occur naturally in an unstable nucleus. Bombarding an energetic particle can induce nuclear reactions.  In this article, both the naturally occurring nuclear reactions are termed as radioactive decay and the induced nuclear reactions are further categorized as nuclear fission and nuclear fusion.