# The Search for EHE: Breakout Activity

This table-top escape room activity will have your students thinking and collaborating while solving challenges related to black holes and senior physics. Students work through challenges related to a black hole exploration mission as a small group of black hole researchers. You can pick and choose from the challenges based on your classroom needs. An online version of this activity is also provided, with a link to a Google Form. The online version requires no setup and can be run right away.

**Cyg X-1 Probe (Doppler Effect) **

Students use their knowledge of the Doppler effect to solve a puzzle related to the accretion disk of a real black hole.

**Vul 1988 Probe (Gravitational Forces) **

Students use data and equations to calculate gravitational forces in the vicinity of a black hole.

**V616 Mon Probe (Time Dilation) **

Students are told that a probe has deposited several tree-growing pods, each at a different orbital radius around black hole V616 Mon. They use gravitational time dilation to determine a tree’s age.

**V518 Per Probe (Spaghettification) **

Students are challenged to examine the stretching and squeezing of a probe near a black hole due to tidal forces.

**Sgr A* Probe (Kepler’s Third Law) **

Students determine the mass of Sgr A* using Kepler’s third law.

**Location of EHE (Escape Velocity) **

Students calculate the escape velocity at an orbital radius near a black hole.