Part A A 18-g lead bullet is tested by firing it into a fixed block of wood with a mass of 36 kg. The block and imbedded bullet together absorb all the heat generated. After thermal equilibrium has been reached, the system has a temperature rise measured as 0.023 ~ C. Estimate the entering speed of the bullet. Express your answer to two significant figures and include the appropriate units. HA ? U= Value Units Submit Request Answer