Compared to the underlying photosphere and chromosphere, the corona is ________ in temperature

Fill in the blank(s) with correct word


much hotter

Physics & Space Science

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In 20 minutes, Kara ran 2.40 km on a treadmill facing due east. Relative to the gym, what were her displacement and average velocity during this time interval?

a. 0; 0 b. 0; 2.00 m/s c. 2.40 km, east; 0 d. 2.40 km, east; 2.00 m/s, east e. 2.40 km, west; 2.00 m/s, west

Physics & Space Science

If we could observe a spacecraft actually traveling past us at the speed of light, we would measure its mass to be

A) zero B) slightly greater C) infinite D) the same as at rest

Physics & Space Science

Uncertainty Principle Using Energy and Time: The energy released when an unstable electron state decays has an uncertainty of about 0.50 eV. What is the uncertainty in the life-time of the level? (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)

A. 1.3 × 10-15 s B. 8.3 × 10-15 s C. 1.3 × 10-11 s D. 8.3 × 10-11 s

Physics & Space Science

Watch dials contain radium glow because

A. all radioactivity creates light B. batteries supply energy when a button is pushed C. the radiation hits a phosphor D. They don't glow. Only tritium glows.

Physics & Space Science