{"id":8325,"date":"2024-04-15T02:58:43","date_gmt":"2024-04-15T02:58:43","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=8325"},"modified":"2024-04-15T02:58:43","modified_gmt":"2024-04-15T02:58:43","slug":"in-a-tropical-year-the-numbers-of-sidereal-days-are-a-one-less-than-mean-solar-days-b-one-more-than-mean-solar-days-c-equal-to-mean-solar-days-d-none-of-these","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/in-a-tropical-year-the-numbers-of-sidereal-days-are-a-one-less-than-mean-solar-days-b-one-more-than-mean-solar-days-c-equal-to-mean-solar-days-d-none-of-these\/","title":{"rendered":"In a tropical year, the numbers of sidereal days are A. One less than mean solar days B. One more than mean solar days C. Equal to mean solar days D. None of these"},"content":{"rendered":"<p>\r\n    <!-- Check if it's an AMP page -->\r\n            <!-- Non-AMP version -->\r\n        <div class=\"mcq-container\" data-quiz-id=\"quizState_6a99ee22b92cd\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"true\">\r\n                    One less than mean solar days                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    One more than mean solar days                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    Equal to mean solar days                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    None of these                <\/div>\r\n                            \r\n            <!-- Feedback messages for non-AMP -->\r\n            <div class=\"feedback\" data-feedback=\"wrong\">Answer is Right!<\/div>\r\n            <div class=\"feedback\" data-feedback=\"right\">Answer is Wrong!<\/div>\r\n        <\/div>\r\n\r\n        <script>\r\n        document.addEventListener('DOMContentLoaded', function () {\r\n            var containers = document.querySelectorAll('.mcq-container');\r\n\r\n            containers.forEach(function(container) {\r\n                var options = container.querySelectorAll('.option');\r\n                var feedbackSelect = container.querySelector('[data-feedback=\"select\"]');\r\n                var feedbackWrong = container.querySelector('[data-feedback=\"wrong\"]');\r\n                var feedbackRight = container.querySelector('[data-feedback=\"right\"]');\r\n\r\n                options.forEach(function(option) {\r\n                    option.addEventListener('click', function() {\r\n                        var selectedOption = option.getAttribute('data-option-key');\r\n                        var isCorrect = option.getAttribute('data-is-correct') === 'true';\r\n\r\n                        \/\/ Remove previous selections\r\n                        options.forEach(function(opt) {\r\n                            opt.classList.remove('correct', 'incorrect');\r\n                        });\r\n\r\n                        \/\/ Add the correct\/incorrect class\r\n                        if (isCorrect) {\r\n                            option.classList.add('correct');\r\n                            feedbackRight.hidden = false;\r\n                            feedbackWrong.hidden = true;\r\n                        } else {\r\n                            option.classList.add('incorrect');\r\n                            feedbackRight.hidden = true;\r\n                            feedbackWrong.hidden = false;\r\n                        }\r\n\r\n                        \/\/ Hide select feedback\r\n                        feedbackSelect.hidden = true;\r\n                    });\r\n                });\r\n            });\r\n        });\r\n        <\/script>\r\n    \r\n    <!--more--><\/p>\n<p>The correct answer is: A. One less than mean solar days.<\/p>\n<p>A tropical year is the time it takes for the Earth to orbit the Sun once relative to the vernal equinox. It is approximately 365.2422 mean solar days long. A mean solar day is the time it takes for the Earth to rotate on its axis once relative to the Sun. It is approximately 24 hours long.<\/p>\n<p>The Earth&#8217;s orbit around the Sun is not a perfect circle. It is slightly elliptical, which means that the Earth&#8217;s distance from the Sun varies throughout the year. This variation in distance causes the Earth&#8217;s orbital speed to vary. The Earth is fastest when it is closest to the Sun (perihelion) and slowest when it is farthest from the Sun (aphelion).<\/p>\n<p>The Earth&#8217;s rotation on its axis is also not constant. The Earth&#8217;s rotation is slowing down due to the tidal friction caused by the Moon&#8217;s gravity. This slowing of the Earth&#8217;s rotation causes the length of a mean solar day to increase over time.<\/p>\n<p>The combination of the Earth&#8217;s elliptical orbit and the Earth&#8217;s slowing rotation causes the <div class=\"youtube-subscribe-container\">\r\n        <a href=\"https:\/\/www.youtube.com\/channel\/UCNHT8lW-JmLC68rjBfZhdkg?sub_confirmation=1\" target=\"_blank\" class=\"youtube-subscribe-button\">\r\n            <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                    <div class=\"telegram-channel-container\">\r\n        <a href=\"https:\/\/t.me\/pscnotes2025\" target=\"_blank\" class=\"telegram-channel-button\">\r\n            <span class=\"telegram-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 496 512\">\r\n                    <path fill=\"white\" d=\"M248,8C111,8,0,119,0,256s111,248,248,248s248-111,248-248S385,8,248,8z M362,177L320,367c-3,14-10,18-20,14l-56-41l-27,26 c-3,3-5,5-10,5l4-63L323,196c5-5-1-7-8-3l-98,62l-42-13c-9-3-10-9,2-14l162-63C351,160,365,164,362,177z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Join Our Telegram Channel\r\n        <\/a>\r\n    <\/div> <path d=\"M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Subscribe on YouTube\r\n        <\/a>\r\n    <\/div> number of sidereal days in a tropical year to be one less than the number of mean solar days.<\/p>\n<p>Option B is incorrect because the number of sidereal days in a tropical year is one less than the number of mean solar days.<\/p>\n<p>Option C is incorrect because the number of sidereal days in a tropical year is not equal to the number of mean solar days.<\/p>\n<p>Option D is incorrect because the number of sidereal days in a tropical year is not none of these.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Join Our Telegram Channel Subscribe on YouTube<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[654],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>In a tropical year, the numbers of sidereal days are A. 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