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…
QAD
If u = log (x^2 + y^2)/(xy) Then prove that x ∂^2u/∂x + y ∂u/∂y = 0.
If u = log (x^2 + y^2)/(x + y) Then prove that x ∂^2u/∂x + y ∂u/∂y = 1. Solution: \(u =\log\left(\frac{x^2 + y^2}{xy}\right)\) \(e^u …
An explorer walks 22 km in a northerly direction and then walks in a direction 60 degrees south of east for 47 km. How far is she from where she started?
Suppose explorer start from origin $A$ $A…
A 300V battery is connected across capacitors of 3uF and 6µF in parallel. Calculate the energy stored in each capacitor.
Question: A 300V battery is connected across capacitors of 3uF and 6µF in parallel. Calculate the energy stored in each capacitor.…
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…
Friction: Static, Kinetic, and Impending Motion Explained
Friction and Impending Motion Friction Friction is a force that opposes the relative motion or attempts to ini…
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…
getch() vs getche() - Comparison table in C Programming
getch() vs getche() - Comparison Table Comparison of getch() and getche() in C Programming …
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…
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Using First Principle, Find Derivative of log(Cos x).
The derivative of a function $f(x)$ by the first principle of derivatives is defined to be the following limit: $f'(x)=\dfrac{d}{dx}(f(x))$ $=…
How do increase in temperature and pressure affect the equilibrium of the following reaction: ${N_2}(g) + {H_2}(g) \mathbin{\lower.3ex\hbox{$\buildrel\textstyle\rightarrow\over{\smash{\leftarrow}\vphantom{_{\vbox to.5ex{\vss}}}}$}} 2N{H_3}(g){\rm{ + Heat}}$
Question: How do increase in temperature and pressure affect the equilibrium of the following reaction: ${N_2}(g) + {H_2}(g) \mathbin{\lower.3ex\…
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…
Why HNO3 is used as oxidizing agent?
Solution: Nitrogen can have oxidation numbers from −3 to +5. The oxidation number of nitrogen in HNO 3 is +5. Thus, increase in oxidation number be…
The hydroxide of alkaline earth metal are relatively less basic than hydroxide of alkali metal of same period why?
Solution: The hydroxides of alkaline earth metals are less basic than the hydroxides of alkali metals because of several reasons. Alkali metals form…