49 ÷ 7 = 7,
70 ÷ 7 = 10,
91 ÷ 7 = 13,
99 ÷ 7 = 14.14
So, 49, 70 and 91 are the multiples of 7 while 99 is not a multiple of 7.
Hence, 99 is the odd one.49 ÷ 7 = 7,
70 ÷ 7 = 10,
91 ÷ 7 = 13,
99 ÷ 7 = 14.14
So, 49, 70 and 91 are the multiples of 7 while 99 is not a multiple of 7.
Hence, 99 is the odd one.No discussions yet. Be the first to start!
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Resistance: The property of electrical materials and electrical instruments that opposes the flow of current through them is called resistance.
It is denoted by R. The SI unit of resistance is the ohm (Ω).
Power: The rate of work done by an electric current is called power. It is denoted by P. The SI unit of power is the watt (W).
Power dissipation (P) is given by:
\(P=VI=\frac{V^2}{R}=I^2R\)
Where V is the potential difference across resistance, I is current flowing and R is resistance.
Calculation:
With R = 50 Ω, and V = 220 V, the power required by the bulb will be:
\(P=\frac{V^2}{R}=\frac{220\times 220}{50}\)
P = 968 W
Select the Venn diagram that best represents the relationship between the following classes.
Eagle, Bird, Crocodile
Eagle, Bird, Crocodile
All Eagle is the Bird and Crocodile is the reptile.
So, Venn diagram given bellow-

Hence, option 4 is the correct answer.
Concept:
Explanation:
These events can be demonstrated by the following equation:
\(\rm \underset{(Carbon\ dioxide)}{6CO_2} + \underset{(Water)}{6H_2 O} \xrightarrow[Chlorophyll]{Sunlight} \underset{(Carbohydrates)}{C_6H_{12}O_6} + \underset{(Oxygen)}{6O_2}\)
Therefore, Plants require CO2, Chlorophyll, Sunlight and water for autotrophic nutrition and hence the correct option will be ''All of these''.
Concept-
Vestigial organs are the organs that once were useful in an animal's body millions of years ago, but now they are useless or very close to useless.
Key Points Human heart-
Additional Information Wisdom teeth
Nictitating membrane of eye
Vermiform appendix
CONCEPT:
\(Power\;\left( P \right) = \frac{{\;W}}{{t}}\)
CALCULATION:
Given - mass of 1st person (m1) = 80 kg, mass of 2nd person (m2) = 60 kg, time (t1) = 12 sec, and time (t2) = 11 sec
\(\Rightarrow P_1 = \frac{mgh}{t}=\frac{80gh}{12}\) ----(1)
\(\Rightarrow P_1 = \frac{mgh}{t}=\frac{60gh}{11}\) ----(2)
On dividing equations 1 and 2, we get
\(\Rightarrow \frac{P_1}{P_2} =\frac{\frac{80gh}{12}}{\frac{60gh}{11}}=\frac{11}{9}\)