2. An isotope of sodium 24N a has a half-life of 15 hours. A sample of this isotope has a mass of 2g. (a) Find the amount remaining after 60 hours.  (b) Find the amount remaining after t hours.  (c) Estimate the amount remaining after 4 days.  (d) Estimate the time required for the mass to be reduced to 0.01g

Q: Q2-A-Three masses are placed on the x-axis :100g at x-0;200g at x=20cm ;and 400g at x=70cm. Determin...

A: Given :-   A) 100 g at x =0 cm , 200g at x= 20 cm, 400g at x= 70 cm. B) A = 3i+2j, B = i+5j

Q: 000 U.S. Household income www.doctorhousingbubble.com 7,000 6.000 5,000 4,000 3,000 2,000 1,000 Unde...

A: Skewness is the measure of asymmetric representation in histogram For normal distribution means both...

Q: The average energy of an atom or molecule in a gas is 3/2 kT where k is the Boltzmann Constant, and ...

A: Average energy of an atom or molecule = 3/2 kT  Here k is Boltzmann constant  T is temperature in Ke...

Q: A series LRC circuit has a 69.2Ω resistor, a 6.7μF capacitor, and a 8.1 mH inductor. The AC source h...

A: Given Resistance of the resistor is R=69.2 Ω Capacitance of the capacitor is C=6.7 μF=6.7×10-6 F Ind...

Q: 2V C = Tr/N l+ ^p(5+N) Q2. a) Step-by-step derive Nopt the optimal number of cells in a location are...

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Q: Earth and Jupiter being separated by a distance = 5.88 x 10^11 m when they are closest a). Use Newto...

A: Earth and Jupiter being separated by a distance, d = 5.88 x 1011 m   Universal gravitational constan...

Q: Two particles of equal mass 'm' go around a circle of radius Runder the action of their mutual gravi...

A:

Q: Suppose that a typical power plant produces about 10 billion kilowatt-hours (kWh) per year. To produ...

A: the power pwoduced by a power plant is 10 billion kWh per year.   1 billion = 109

Q: A resistance of 25 Q is connected to a 12 V battery. Calculate the heat energy in joules generated p...

A: Given data :                     Resistance   =  R                      Voltage    =   V            ...

Q: A) State the main differences between the parallel circuits and Series circuits. B) State and draw t...

A: Series circuit : A circuit is said to be a series circuit when the flow of current is the same throu...

Q: A woman traveled 20m/s for 2min., 30m/s for 3min., and 15m/s for 1min. Find her average velocity.

A: Given: v1=20 m/st1=2 min = 120 sv2=30 m/st2=3 min = 180sv3=15 m/st3=1 min=60s

Q: The resistance of a wire is R. It is bent at the middle by 180° and both the ends are twisted togeth...

A:

Q: • Part A A typical cell has a membrane potential of -70 mV, meaning that the potential inside the ce...

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Q: Q1-A-A projectile is shot upward from the earth with a speed of 30m/s .How high is it when its speed...

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Q: A bullet of mass 20g has an initial speed of 1 ms-, just before it starts penetrating a mud wall of ...

A:

Q: 7. The electrons in the hydrogen atom are at the activation energy level 1. 7.4 If an electron chang...

A:

Q: Part A A sound source producing 1.20 kHz waves moves toward a stationary listener at one-half the sp...

A: frequency of sound source = 1200 Hz 

Q: A Clamper circuit must have O a. diode O b. capacitor O c. all of these O d. a dc source O e. resist...

A: A clamper circuit must have a capacitor,diode and resistive element. The magnitude R (resistance) an...

Q: A woman swims the length of a 120-m pool and back again (one lap) in 90 s with a constant speed.  1....

A: Given data:  Woman swims the length of pool and back again (one lap) Length of pool = 120 m Required...

Q: Two conductive balls have the same. charge of the first (-8µc) and the charge of the second (+2µc) I...

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Q: Diameter of the objective lens of a telescope is 250 cm. For light of wavelength 600 nm coming from ...

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Q: A dog in an open field runs 12.0m east and then 28.0m in a direction 50° west of north. In what dire...

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Q: Q1: determine the resultant of the force system in next figure. And locate the resultant with respec...

A:

Q: Suppose that a typical power plant produces about 10 billion kilowatt-hours (kWh) per year. To produ...

A: A typical power plant produces about 10 billion kWh per year.   1 billion = 109

Q: What is the minimum diameter (D) of the Cu wire so that AV < 1.5 V? Ocu = 6.07 x 107 (Ohm-m)1 -l = 1...

A:

Q: A parachutist whose mass is 65 kg drops from a helicopter hovering 2500 m above the ground and falls...

A: Mass=65kg Length=2500m B1=30N-sec/m  

Q: 8. Young's double-slit experiment, shown in Fig. L = 140 cm and d = 0.15 mm when irradiated with a c...

A:

Q: Two blocks connected by a light horizontal rope sit at rest on a horizontal, frictionless surface. B...

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Q: A piston executes simple harmonic motion with an amplitude of 0.1 m. If it passes through the center...

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Q: An electric line with a charge of 6 micro C goes from point y to point Z with an electric potential ...

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Q: Cabe tate the orrk requireal dele elome e toa cr of 1500 Fg moving at a veloily of 6 K-ln?

A: Mass of the car (m) = 1500 kg Velocity (v) = 60 km/hr v = 60 x 5/18 v = 16.67 m/s The car is in moti...

Q: what height of oil will be produced the same pressure as120mm Hg ? the oil density equal 0.9 form wa...

A: pressure = 120 mm of Hg density of oil = 0.9 times the density of water   

Q: 21. A 10.0 uC charge is placed at x =0 m, y =0 m. A second -5.0 uC charge is placed at x =2.0 m, y =...

A:

Q: Stress and strain 3. A brass rod with a length of 1.40 m and a cross- sectional area of 2.00 square ...

A: Given that:- Pulling force applied on each end=F=4×10^4N

Q: Question 1: What is the relationship between the Torque and the distance of the force from the axis ...

A: 1. Torque is defined as a force applied to a point on an  object about the axis of rotation.  The st...

Q: Use the worked example above to help you solve this problem. A block with mass of 4.79 kg is attache...

A: In this question we have to determine the speed of the block at different points. Please give positi...

Q: Q1-A-A projectile is shot upward from the earth with a speed of 30m/s .How high is it when its speed...

A:

Q: Table 3. Moment of Inertia Outer Radius (m) Inner radius (m) Moment of Inertia (kg.m) 1.6 kg.m2 1.62...

A: Given that:- Table of Moment of Inertia, inner radius, and outer radius is given.

Q: A negative charge flows slowly across an electric field, losing 100 J of energy in the process. The ...

A: Given ∆PE = -100 J∆V = -10 V

Q: A parallel plate capacitor has plates of area 5.4 cm2, separated by a distance 5.1 mm and a dielectr...

A:

Q: Calculate the peak voltage of a generator that rotates its 215 turns, 0.100 m diameter coil at 3600 ...

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Q: A circular area with a radius of 5 cm lies in the xy-plane. What is the magnitude of the magnetic fl...

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Q: ) Sketch the earth and Jupiter, showing the center of the planets being separated by a distance d = ...

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Q: TA charge of 20C flows out from a battery in 6 seconds and as a result 120 Jor anergy is supplied to...

A: A wire wound resistor is an electrical passive element that limits or restricts current flow in a ci...

Q: A disk rotates about its central axis starting from rest and accelerates with constant angular accel...

A: According to question we need to find --- (a) Calculate the angular acceleration. (b) Calculate the...

Q: certain gasoline weighs 20 lb/ft, what are the values of its density, specific volume, and specific ...

A: 1 lb = 0.454 kg 1 ft = 0.305 m

Q: Q1: The cable AB supports three vertical loads as shown in next figure. Compute the resultant of the...

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Q: An AC circuit has an rms current of 8.9 A, and an rms EMF of 3.1 V. What is the amount of average po...

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Q: From the ground level, a marble is tossed vertically upward. A second marble is hurled vertically up...

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Q: A soccer player kicks a ball at 30m/s at an angle above the horizontal of 50 degrees minus the day o...

A:

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.