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Questions in physics

[Terjawab] The type of radioactive decay in which the mass number and atomic number remain unchanged is: A) beta radiation B) alpha radiation C) positron radiation D) gamma radiation

[Terjawab] Does weight decrease when you're on the moon?

[Terjawab] When Plutonium-239 undergoes alpha decay, it becomes: A) Curium-241 + an alpha particle B) Uranium-235 + an alpha particle C) Neptunium-237 + an alpha particle D) Plutonium-237 + an alpha particle

[Terjawab] If planet A is three times as far from planet C, then the period of its orbit will be __ times as long.

[Terjawab] If planet A is four times as far from the sun as planet C, then the period of its orbit will be __ times as long.

[Terjawab] If the forces are balanced, what is the resulting acceleration?

[Terjawab] Which of the following causes high and low tides on Earth? A. The moon's gravitational pull on Earth causes water to bulge on two sides of the Earth. B. Water swells when tsunamis occur in two areas of Earth at the same time. C. The Earth's rotation is so fast, water will swell and shrink twice a day. D. The Earth is tilted on an axis, causing water to spread unevenly throughout the planet.

[Terjawab] Which best describes the difference between a seismograph and a seismogram? A. A seismograph is a written record of volcanic eruptions, while a seismogram is a written record of earthquakes. B. A seismograph records tectonic activity, while a seismogram records volcanic activity. C. A seismograph is the instrument that detects and records volcanic activity, while a seismogram is the written record of that activity. D. A seismograph is the instrument that detects and records movements within the earth, while a seismogram is the recording.

[Terjawab] Which of the following is an example of the absolute threshold? A. Dimitri turns down the shower because it is too hot. B. Sam recognizes that the restaurant lights have suddenly dimmed. C. Georgia notices that her soup tastes much spicier than it did last night. D. Juanita barely detects someone tapping on her window pane. E. Bill can't quite see who the person is across the field.

[Terjawab] Andre is studying snails and how fast they travel. He observes three groups of snails containing four snails each. Here are the recorded observations from Andre’s notebook: - Group A snails averaged a speed of 4.7 cm/min in a petri dish. - Group B snails averaged a speed of 2.8 cm/min on sandpaper. - Group C snails averaged a speed of 3.3 cm/min in the dirt. Based on this data, what is affecting the snails’ speed?