# Energy Practice Problems

##### 1. Gibb’s free energy equation is directly related to ______ and _______.
1. Work and Time
2. Heat and Work
3. Enthalpy and Entropy
4. Power and Enthalpy
##### 2. Which of the following is correct expression for Gibbs’ free energy formula?
1. DG = DH – TDS
2. G = H – TS
3. DG = DH – T/S
4. G = H – T/S
##### 3. Which of the following is the correct expression of Bernoulli’s principle?
1. As KE increases, another form of energy must decrease.
2. As KE increases, other forms of energy also increase.
3. KE remains relatively stable in a closed loop.
4. KE has a limited effect upon wavelength.
1. W = DKE
2. W = K – DE
3. W = K x DE
4. W = DK / DE
1. 1.2 J
2. 2.4 J
3. 3.1 J
4. 7.4 J
##### 6. A distance of 1.0 x 103 separates the charge at the bottom of the cloud and the ground. The electric field intensity between the bottom of the cloud and the ground is 2..0 x 104 newtons per coulomb. What is the potential difference between the bottom of the cloud and the ground?
1. 1.4 x 104 V
2. 2.5 x 103 V
3. 2.8 x 106 V
4. 2.0 x 107 V
1. 210 kJ
2. 305 kJ
3. 390 kJ
4. 414 kJ
##### 8. An electron is located between a pair of oppositely charged parallel plates. As the electron approaches the positively charged plate, the kinetic energy of the electron?
1. Increases
2. Decreases
3. Remains the same
4. Transforms into potential energy
##### 9. If the speed of a moving object is doubled, which quantity also associated with the object must double?
1. Momentum
2. KE
3. Gravitational potential energy
4. Acceleration
1. 115 W
2. 210 W
3. 250 W
4. 320 W
1. 24 N
2. 35 N
3. 42 N
4. 48 N
1. 111 J
2. 151 J
3. 260 J
4. 270 J
1. 30 J
2. 60 J
3. 400 J
4. 500 J
##### 14. Compared to insulators, metals are better conductors of electricity because metals contain more free _____.
1. Protons
2. Electrons
3. Neutrons
4. Positive ions
1. 1 sec.
2. .1 sec
3. .25 sec
4. 200 sec