We are warmed on a hot moist day because water molecules in the air striking our bodies
A) transfer some of their kinetic energies to us.
B) gain kinetic energy as they change state.
C) form an insulating layer on our bodies.
Answer: A
You might also like to view...
Momentum is defined as
A) mass multiplied by velocity. B) mass multiplied by speed. C) force multiplied by velocity. D) mass multiplied by acceleration.
When is a rock considered an ore?
-when it occurs in sufficient amounts to be used to build roads and buildings -only when it contains lead -when it contains at least one metallic mineral in sufficient amounts to be extracted profitably -only when it contains iron -when it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably
A 1.00-kg piece of iron at 655°C is dropped into a calorimeter of negligible heat capacity containing 50.1 g of water at 30°C. What is the final temperature of the system? The specific heat of iron is 448 J/(kg K)
the specific heat of steam is 2010 J/(kg K). and the latent heat of vaporization of water is 22.6 × 105 J/kg. A) 100°C B) 210°C C) 320°C D) 430°C E) 635°C
The speed of a satellite orbiting Earth is given by v = ?(GM/d). Escape speed from Earth is given by v = ?(2GM/d), where in both cases G is the gravitational constant, M is Earth's mass, and d is distance from Earth's center
If a satellite's kinetic energy were doubled it could A) orbit at twice its distance from Earth. B) orbit at four times the distance from Earth. C) escape Earth.