The most massive planet in our solar system is
A) Saturn.
B) Uranus.
C) Mars.
D) Jupiter.
E) Neptune.
D) Jupiter.
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The main lens or mirror of a telescope is called the ____________________
Fill in the blank(s) with correct word
Basic Postulates: You are riding in a spaceship that has no windows, radios, or other means for you to observe or measure what is outside. You wish to determine if the ship is stopped or moving at constant velocity. How can you do this?
A. You can determine if the ship is moving by determining the apparent velocity of light in the spaceship. B. You can determine if the ship is moving by checking your precision time piece. If it's running slow, the ship is moving. C. You can determine if the ship is moving by lying down and measuring your height. If you are shorter than usual, the ship is moving. D. You should give up because you have taken on an impossible task!
Sound vibrations with frequencies less than 20 Hz are called
A) infrasonics. B) ultrasonics. C) supersonics. D) infrared. E) megasonics.
A styrofoam container used as a picnic cooler contains a block of ice at 0°C. If 225 grams of ice melts in 1 hour, how much heat energy per second is passing through the walls of the container? (The heat of fusion of ice is 3.33 × 10^5 J/kg)