Please help!0.005 kg of copper was heated from 20°C to 80°C. How much energy was used to heat Cu? (Specific heat capacity of Cu is 385 J/kg °C) 2. Marcos is playing tug-of-war with his cat using a stuffed toy. At one instant during the game, Marcos pulls on the toy with a force of 22 N, the cat pulls in the opposite direction with a force of 19.5 N, and the toy experiences an acceleration of 6.25 m/s2 . What is the mass of the toy? (Hint: Think about the Net Force)
3. Haloke does 176 J of work lifting himself 0.300 m.
a. What is Halok’s force?
b. Using gravity as acceleration, what is