*Question*
Answer the following question given this paragraph: Wavelengths are described by a unit of distance, typically meters. Q: Wavelengths are described by a unit of what? Choices: - weight - direction - speed - distance A:
**Answer**
distance

*Question*
Answer the following question given this paragraph: Earth itself acts like a gigantic gyroscope. Its angular momentum is along its axis and points at Polaris, the North Star. But Earth is slowly precessing (once in about 26,000 years) due to the torque of the Sun and the Moon on its nonspherical shape. Q: Earth acts like a giant version of what device, with angular momentum along its axis and pointing at polaris, the north star? Choices: - compass - telescope - accelerator - gyroscope A:
**Answer**
gyroscope

*Question*
Answer the following question given this paragraph: To sterilize a 50.0-g glass baby bottle, we must raise its temperature from 22.0C to 95.0C . How much heat transfer is required? 4. The same heat transfer into identical masses of different substances produces different temperature changes. Calculate the final temperature when 1.00 kcal of heat transfers into 1.00 kg of the following, originally at 20.0C : (a) water; (b) concrete; (c) steel; and (d) mercury. Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a total of 20 rubs, at a distance of 7.50 cm per rub, and with an average frictional force of 40.0 N, what is the temperature increase? The mass of tissues warmed is only 0.100 kg, mostly in the palms and fingers. A 0.250-kg block of a pure material is heated from. Q: Rubbing your hands together warms them by converting work into what energy? Choices: - kinetic energy - motion energy - layer energy - thermal energy A:
**Answer**
thermal energy

*Question*
Answer the following question given this paragraph: You generally can't see, smell, taste, hear, or feel radiation. Fortunately, there are devices such as Geiger counters that can detect radiation. A Geiger counter, like the one pictured in the Figure below , contains atoms of a gas that is ionized if it encounters radiation. When this happens, the gas atoms change to ions that can carry an electric current. The current causes the Geiger counter to click. The faster the clicks occur, the higher the level of radiation. You can see a video about the Geiger counter and how it was invented at the URL below. Q: What does the geiger counter detect? Choices: - vibration - convection - moisture - radiation A:
**Answer**
radiation