The question asks about the maximum length an individual nerve cell (neuron) can reach. This is a factual question related to human anatomy and physiology. We need to recall the typical lengths of neurons in the human body.
Correct Option: B) 100 cm
Individual nerve cells, especially those extending from the spinal cord to the limbs (like those in the sciatic nerve), can be very long. A length of up to 100 cm (1 meter) is a well-established fact in human anatomy, enabling rapid signal transmission over long distances.
What is the lateral mirror image of A213B?
To find the lateral mirror image of the sequence "A213B", we need to reverse the order of the characters as they would appear in a mirror placed vertically.
The correct mirror image is shown in option B, which is "B312A".
Correct Option: B) B312A
The question asks for the number of elements present in the sixth period of the modern periodic table. To answer this, we need to understand the structure of the periodic table, specifically how elements are arranged into periods and groups, and the filling of electron shells.
C) 32 — The sixth period contains elements where the \(6s\), \(4f\), \(5d\), and \(6p\) subshells are being filled. This accounts for \(2 + 14 + 10 + 6 = 32\) elements. These elements are from atomic number 55 (Cesium) to 86 (Radon).
To find the Least Common Multiple (LCM) of a set of numbers, we can use the prime factorization method. This involves finding the prime factors of each number, then taking the highest power of each prime factor that appears in any of the factorizations and multiplying them together.
The unique prime factors are 3, 5, and 7.
B) 1575 is the correct LCM of 45, 25, and 35.
The problem asks us to identify which assumptions are implicit in the given statement. We need to analyze each assumption to see if it logically follows from the statement, without adding external information.
D) Only assumption II is implicit
Assumption II directly aligns with the stated action of introducing "relaxation" and the general purpose of school programs, which is to enhance student well-being and academic performance. The link between relaxation and better studies is a logical inference in this context.
The problem provides the percentage of silver in an alloy and the actual mass of silver. We need to find the mass of the other elements. We can achieve this by first calculating the total mass of the alloy and then subtracting the mass of silver from it.
Let the total mass of the alloy be \(M_{\text{total}}\). Since \(42\%\) of the total mass is silver, we can write the equation:
\[ 0.42 \times M_{\text{total}} = 147 \text{ g} \]Divide the mass of silver by its percentage (as a decimal):
\[ M_{\text{total}} = \frac{147}{0.42} \]\[ M_{\text{total}} = \frac{147}{\frac{42}{100}} \]\[ M_{\text{total}} = \frac{147 \times 100}{42} \]\[ M_{\text{total}} = \frac{14700}{42} \]\[ M_{\text{total}} = 350 \text{ g} \]If silver constitutes \(42\%\) of the alloy, the other elements constitute the remaining percentage:
\[ \text{Percentage of other elements} = 100\% - 42\% = 58\% \]Now, multiply the total mass of the alloy by the percentage of other elements:
\[ \text{Mass of other elements} = 58\% \times M_{\text{total}} \]\[ \text{Mass of other elements} = 0.58 \times 350 \text{ g} \]\[ \text{Mass of other elements} = 203 \text{ g} \]Alternatively, we can subtract the mass of silver from the total mass of the alloy:\[ \text{Mass of other elements} = M_{\text{total}} - \text{Mass of silver} \]\[ \text{Mass of other elements} = 350 \text{ g} - 147 \text{ g} \]\[ \text{Mass of other elements} = 203 \text{ g} \]Correct Option: A) 203 g
The question asks to identify the plant tissue characterized by large intercellular spaces. We need to recall the structural features of each given plant tissue type.
B) Parenchyma tissue is characterized by the presence of large intercellular spaces, which are crucial for its functions like gas exchange, storage, and photosynthesis.
This question tests knowledge of atmospheric refraction and its effect on the apparent position of the Sun during sunrise and sunset. Atmospheric refraction causes light rays from the Sun to bend as they pass through Earth's atmosphere, making the Sun appear higher in the sky than its actual position.
A) 2 minutes — Atmospheric refraction causes the Sun to appear about \(0.5^\circ\) higher than its actual position when it is near the horizon. Since the Earth rotates by \(1^\circ\) in 4 minutes, a \(0.5^\circ\) shift accounts for a 2-minute advance in sunrise and a 2-minute delay in sunset.
A balanced chemical equation adheres to the Law of Conservation of Mass, meaning the number of atoms of each element on the reactant side must be equal to the number of atoms of the same element on the product side. We will check each option to see if this condition is met.
D) 2Mg + O₂ → 2MgO
This equation is balanced because the number of atoms of each element is the same on both sides of the reaction:
How many triangles are there in the following figure?
To determine the total number of triangles in the given figure, we need to systematically count all possible triangles, including those formed by combining smaller triangles.
After following these steps, the total number of triangles in the figure is found to be 27.
Correct Option: D) 27