JEE 2021 | समतल में गति - L10 | speed in plane | Class 11 भौतिक विज्ञान | Ravikant Sir | 7PM

Acids,Bases and pH - Class 10 Science | 7 PM Master Class By Vipin Sir

A field roller, in the shape of a cylinder, has a diameter of 1 m and length of a 1 1/4 m. If the speed at which the roller rolls is 14 revolutions per minute, then the maximum area (in m^2 ) that it can rollin 1 hour is : (take pi=22/7 ) एक बेलनाकार फील्ड रोलर का व्यास 1 मीटर लंबाई और लंबाई 1 1/4 मीटर है। रोलर यदि एक नियमित गति से प्रति मिनट 14 चक्कर लगाता है, तो उसी गति से एक घंटे में यह रोलर अधि कतम कितना क्षेत्रफल (मीटर वर्ग में) समतल करेगा? ( pi=22/7 लीजिए)

A boat can go 10 km upstream and 20 km downstream in 7 hours. It can go 20 km upstream and 10 km downstream in 11 hours. What is the speed of this boat in still water ? एक नाव 7 घंटे में 10 km. उध्र्वप्रवाह (अपस्ट्रीम) तथा 20 km. अनुप्रवाह (डाउनस्ट्रीम) चल सकती है | वह 11 घंटे में 20 km. उध्र्वप्रवाह (अपस्ट्रीम) तथा 10 km. अनुप्रवाह (डाउनस्ट्रीम) चल सकती है | स्थिर जल में नाव की गति कितनी है ?

There of the fundamental constant of physics are the universal gravitational constant, G=6.7xx10^(-11) m^(3) kg^(-) s^(-2) , the speed of light c=3.0xx10^(8) m//s and Planck's constant, h=6.6xx10^(-34) Js^(-1) . two particles A and V are projected in the vertical plane with same initial velocity u_(0) fro part (0,0) and (l,-h) towards each other as shwon in figure The path of particle A with respect to particle B will be –

There of the fundamental constant of physics are the universal gravitational constant, G=6.7xx10^(-11) m^(3) kg^(-) s^(-2) , the speed of light c=3.0xx10^(8) m//s and Planck's constant, h=6.6xx10^(-34) Js^(-1) . two particles A and V are projected in the vertical plane with same initial velocity u_(0) fro part (0,0) and (l,-h) towards each other as shwon in figure Minimum distance between particle A and B during motion

There of the fundamental constant of physics are the universal gravitational constant, G=6.7xx10^(-11) m^(3) kg^(-) s^(-2) , the speed of light c=3.0xx10^(8) m//s and Planck's constant, h=6.6xx10^(-34) Js^(-1) . two particles A and V are projected in the vertical plane with same initial velocity u_(0) fro part (0,0) and (l,-h) towards each other as shwon in figure The time when separation between A and B is minimum is

A car can finish a certain journey in 10 hours at a speed of 42 kmph. In order to cover the same distance in 7 hours? the speed of the car (km/h) must be increased by: एक कार एक निश्चित दूरी 42 किमी/घण्टा की दर से 10 घण्टे में पूरी करती है। उसी दूरी को 7 घण्टे में तय करने के लिए कार की गति में किंतने किमी/घण्टे की वृद्धि आवश्यक है?

A gas bulb of 1 L capacity contains 2.0xx10^(11) molecules of nitrogen exerting a pressure of 7.57xx10^(3)Nm^(-2) . Calculate the root mean square (rms) speed and the temperature of the gas molecules. If the ratio of the most probable speed to the root mean square is 0.82 , calculate the most probable speed for these molecules at this temperature.