Give two examples each of contact and noncontact forces.
The two examples of contact forces are frictional force and applied force. The two examples of noncontact forces are gravitational... View Article
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Nuclear sizes are expressed in a unit named
Nuclear sizes are expressed in a unit named Fermi. It is a unit of length equal to 10-15 meter that... View Article
The unit of current is
The SI unit of current is ampere which measures the flow of electric charge across a surface at the rate... View Article
The SI unit of temperature is
The SI unit of temperature as per the International System of Units is Kelvin, represented by the symbol K. Temperatures... View Article
The frequency of direct current dc is
Direct current or DC is the one directional flow of electric charge. The frequency of direct current dc is 0... View Article
What is the rate of change of displacement called?
The rate of change of displacement is called velocity. The velocity of an object, in general, changes during its course... View Article
Choose the correct alternative to complete the series
Choose the correct alternative to complete the series: 11, 32, 53, 74, 95, ? (a) 106 (b) 111 (c) 113... View Article
0, 6, 24, 60, 120, 210, ?
Answer: 336 23-2=6 33-3=24 43-4=60 53-5=120 63-6=210 73-7=336.
In a triangle abc, angle a – angle b = 15 degrees and angle b – angle c = 30 degrees. Find angle a, b and c.
Answer: ∠a=80o, ∠b=65o, ∠c=35o
Find the values of cos 72°
The value of cos 72° = 0.30902 radians.
Applications for circles in real life
Circles are frequently used in architecture. One application of circles in science lies in the design of particle separators. The... View Article
The value of (sec a+tan a) (1-sin a) is equal to
The value of (sec a + tan a) (1 – sin a) is equal to cos a.
The value of int logxdx is
The value of i\(\begin{array}{l}\int \log xdx\end{array} \) is a) \(\begin{array}{l}x^2\log (\frac{x}{e})+c\end{array} \) b) \(\begin{array}{l}e^x\log x+c\end{array} \) c) \(\begin{array}{l}x^2\log x+c\end{array} \)... View Article
How many zeros are there in one lakh?
There are five zeroes in one lakh (1,00,000).
What is the meaning of denomination in maths?
A denomination is an accurate description of a currency amount, habitually for coins or banknotes. In maths, the denomination often... View Article
How many congruence rules are there?
There are basically four congruency rules that help in checking whether two triangles are congruent and they are SSS, SAS,... View Article
Sin 35° in fraction form
The value of sin 35° in fraction form is 83/144 and is approximately is equal to 0.57638.
What is the meaning of void set?
A set which contain no element is called void set or null set or empty set. For example, the set... View Article
How many sides does a decagon have?
In geometry, a decagon is a polygon with 10 sides. Hence, it is also called a 10-sided polygon or 10-gon.... View Article
Factorise a – b – a2 + b2.
a – b – a2 + b2 = (a – b) – (a2 – b2) Using the formula, a2 –... View Article
