Created by StemPy LabA satellite moves in a circular orbit of radius around the Earth with speed , where is the radius of the Earth. Its rocket is fired for a very short time, in the direction it is moving. What is the smallest increase in its speed that lets it escape from the Earth's gravity altogether?
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← A light string is wound many times round a uniform solid cylinder of mass m. The free end of the string is tied to the ceiling, and the cylinder is released from rest with the string vertical, as shown in the figure. As the cylinder falls, the string unwinds without slipping. The acceleration of the cylinder and the tension in the string areA glass flask holds exactly 500 cm³ and is filled to the brim with mercury at 20°C. The flask and the mercury are heated together to 100°C. The coefficient of volume expansion of mercury is 1.8 × 10⁻⁴ K⁻¹, and the coefficient of linear expansion of the glass is 9 × 10⁻⁶ K⁻¹. The volume of mercury that spills out is closest to →
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