A radioactive element has a half life of and 2500 years. In how many years will its mass decay by 90% of its initial mass?
A radioactive element has a half life of and 2500 years. In how many years will its mass decay by 90% of its ini…
Class 12 QAD
How many numbers of at most three different digits can be formed the integers 5,6,7,8,9?
How to Form Numbers with At Most Three Different Digits | Mathematical Problem Question: How m…
A physics teacher stands on a freely rotation platform. He holds a dumbbell in each hand of his outstretched arms while a student gives him a push until his angular velocity reaches 1.5rad/sec. When the freely spinning professor pulls his hands in close to his body, his angular velocity increases to 5.0 rad/sec. What is the ratio of his final kinetic energy to his initial energy?
A physics teacher stands on a freely rotation platform. He holds a dumbbell in each hand of his outstretched arms while a student gi…
Difference between Arrays and Structures in C
Comparison between Arrays and Structures in C Introduction In the world of C programming, understanding the differences betw…
In how many different ways can the letters of the word "DETERRANT" be arranged so that the repeated letters do not come together?
In how many different ways can the letters of the word "DETERRANT" be arranged so that the repeated letters…
What happen when phenol is treated with chloroform in presence of base. Prepare DDT , Benzene from chlorobenzene ,2 chloroacetophenone. Why phenol is more acidic than alcohol ? Give reason with structure.
What Happens when Phenol is Treated with Chloroform - Nepali Educate Question: …
$Integrate:\int_{ - 1}^1 {\frac{1}{{{x^2}}}} dx$
Nepali Educate - NEB Class 12 Mathematics Integration Problem $Integrate:\int_{-1…
State Rolle's Theorem. Is this theorem true when the function is not continuous at the end points. Justify your answer.
State Rolle's Theorem - Nepali Educate Question: State Rolle's Theorem. Is this the…
How many numbers of 6 digits can be formed with the digits 2, 3, 2, 0, 3, 3?
Question: How many numbers of 6 digits can be formed with the digits 2, 3, 2, 0, 3, 3? Solution: The digits 2, 3, 2, 0, 3, and 3 can be arra…
In how many ways the letters of the word 'EXCELLENT' can be arranged so that the vowels are always together?
Question In how many ways the letters of the word 'EXCELLENT' can be arranged so that the vowels are always together? Solution, Total no.…
Water flows in a horizontal tube as shown in figure below. The pressure of water changes by 600 N/m² between A and B where the area of cross section is 30cm² and 15 cm² respectively. Calculate the rate of flow of water through the tube.
Question: Water flows in a horizontal tube as shown in figure below. The pressure of water changes by 600 N/m² between A and B where the area of cro…
Calculate the percentage of anhydrous sodium carbonate in the sample if a solution containing 2.5 g sodium carbonate sample is neutralized completely by 55 cc of N/2 HCL.
Solution: Given, Weight of Sodium Carbonate= 2.5gm Volume of HCL(V) = 55ml Normality of HCL (N) = $\frac{1}{2}$N=0.5N So, Purity Percentage = $\frac{…
During beta decay electron got ejected from nucleus of atom, does this violate Heisenberg principle that tells no electron exists in nucleus.
No, beta decay does not violate the Heisenberg uncertainty principle. The Heisenberg uncertainty principle states that it is impossible to know both …
A bus has 4 seats for passengers. Those willing to pay first class fares can take 60 kg of baggage each, but tourist class passengers are restricted to 20kg each. If 120 kg can be carried altogether. Find the number of passengers of each kind by using determinants.
A bus has 4 seats for passengers. Those willing to pay first class fares can take 60 kg of baggage each, but tourist class passengers are restricted …
Cesium-137 (55Cs137) radioactive byproduct from fission nuclear power station. It has a life half-life of 30 years and emits β- radiations.
Calculate the following reaction equation by entering the appropriate number in the boxes 55 Cs 137 → x Ba x + x β x …
In certain thermocouple, the thermos emf is given by E = λθ + $\frac{1}{2} $ βθ2, where θ is the temperature of hot junction, λ = 10µV(0C)-1 and β = -0.05µV(0C)-2. If the cold junction temperature is 00C. Find the neutral temperature.
Your Page Title Solution: At Neutral temperature, Thermo-EMF us maximum. $\frac{dE}{dθ…