Apiece of unknown metal with mass 68.6 g is heated to an initial temperature of 100 °c and dropped into 42 g of water (with an initial temperature of 20 °c) in a calorimeter. the final temperature of the system is 52.1°c. the specific heat of water is 4.184 j/g*⁰c. what is the specific heat of the metal? 1. 0.171 2. 0.342 3. 1.717 4. 3.420

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons

What is the molar mass of a gas that has density of 2.054 g/l