Internal Energy and Specific Heat Exit Ticket

What is the kinetic energy of a 4kg shotput thrown with a velocity of 13m/s

• 676 J
• 3.25 J
• 17J
• 338 J

A cinder block is sitting on a platform 20 m high. It weighs 7.9 kg. Calculate the potential energy.

• 158 J

• 755.33 J

• 1,548.4 J

• 2,955.01 J

A golf pro swings his driver which weighs 0.75Kg at a velocity of 60 m/s. Calculate the kinetic energy of the club.

• 2700 J
• 16.9 J
• 1350 J
• 45 J

A system absorbs 105 kJ of heat from its surroundings while doing 29 kJ of work on the surroundings. Calculate the internal energy and determine whether the process is endothermic or exothermic.

• 76 kJ; endothermic

• 76 kJ; exothermic

• 134 kJ; endothermic

• 134 kJ; exothermic

The system releases 57.5 kJ of heat while doing 22.5 kJ of work on the surroundings. What is the internal energy of the system? Is the system endothermic or exothermic?

• 35 kJ; endothermic

• 35 kJ; exothermic

• -80 kJ; endothermic

• -80 kJ; exothermic

How much energy is needed to raise the temperature of 5.0 grams of lead from 25°C to 35°C? [specific heat (c) = 0.129 J/(g•°C)]

• 6.45 J/(g•°C)

• 6.45 J

• 16.1 J/(g•°C)

• d.16.1 J

The temperature of a 6.0 g sample of glass changed from 20.0°C to 45.0°C when it absorbed 550 J of heat. What is the specific heat of this glass?

• 0.27 J/g °C

• 3.7 J/g °C

• 130 J/g °C

• 12 J/g °C