Our Sun will likely undergo a nova event in about 5 billion years
Indicate whether the statement is true or false
FALSE
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An astronaut is standing on the surface of a planetary satellite that has a radius of 1.74 × 106 m and a mass of 7.35 × 1022 kg
An experiment is planned where a projectile needs to be launched straight up from the surface. What must be the minimum initial speed of the projectile so it will reach a height of 2.55 × 106 m above this satellite's surface? (G = 6.67 × 10-11 N ? m2/kg2) What will be an ideal response?
Doppler shifted hydrogen absorption lines are seen in the spectrum of a star. The hydrogen line at 656.28 nm is seen to be shifted to 656.08 nm. The star is moving at which fraction of the speed of light?
A) about 0.000003 (3 × 10?6 ) B) about 0.0003 (3 ×10?4 ) C) about 0.2 D) about 0.03 (3 × 10?2 )
A very light ideal spring stretches by when it is used to hang a 135-N object
What is the weight of a piece of electronic equipment that would stretch the spring by if you hung the equipment using the spring? A) 289 N B) 63 N C) 176 N D) 405 N
The sum of two vectors of fixed magnitudes has its minimum magnitude when the angle between these vectors is
A) 0° B) 90° C) 270° D) 180° E) 360°