Ask questions and get helpful responses.

A model shows rays of sunlight moving straight from the sun perpendicular to the surface of the earth. What are these rays called?

43,270 results
  1. Science

    A model shows rays of sunlight moving straight from the sun perpendicular to the surface of the Earth. What are these rays called? A)parallel rays B)angled rays C)direct rays D)indirect rays
  2. Science

    A model shows rays of sunlight moving straight from the sun perpendicular to the surface of the earth. What are these rays called?
  3. pHYSIC

    3. Now wait until the planet is at the summer solstice (to the far left). Here the sunlight arrives perpendicular to the surface. (Note that the fact that the sunlight can be perpendicular to the surface here and parallel to the surface at the winter
  4. astronomy

    2. We ultimately want to find the amount of solar energy that hits the observer on the planet. Energy is usually measured in Joules, but there are other appropriate units of energy as well; kilowatt-hours for example, are used to measure the amount of
  5. meteogology

    Does the equator receive perpendicular sun rays to the Earth's surface most of the 365 day year.
  6. Astronomu

    1. There is a common misconception about why the Earth is cold in the winter and warm in the summer. Some believe that this is because the Earth, in its elliptical orbit, is closer to the Sun in the summer and farther away in the winter. The argument is
  7. math

    illuminated by the rays of the setting Sun, Kelly rides along on a merry-go-round casting a shadow on a wall. The merry-go-round is turning 36 deg per sec. Kelly is 25 ft from its center, and the Sun's rays are perpendicular to the wall. At what rate is
  8. Science

    What happens to sunlight when it strikes a dark (black) surface? How is wavelength affected? Why are the Sun's rays the most powerful in the summer solstice and why is this not the hottest time of the year. What frequencies or color of light are most
  9. Physics

    At high noon (sun rays fall perpendicular to the surface of the earth), the sun delivers 990 W to each square meter of a blacktop road, emissivity of 1 (blackbody). If the hot asphalt loses energy only by radiation, what is its equilibrium temperature? I
  10. Physics

    As a comet swings around the Sun, ice on the comet's surface vaporizes, releasing trapped dust particles and ions. The ions, because they are electrically charged, are forced by the electrically charged solar wind into a straight ion trail that points
  11. science

    The sun shines down on a mirror. The angle between the incident rays of sunlight and the vertical is 60o. What is the angle between the reflected rays and the vertical? I think the answer is 60 am i correct
  12. health

    What is the importance of wearing sunglasses all year long? A. They block the amount of light that gets inside your pupils. B. They block the harmful UV rays that come from the sun. - i choose this C. They prevent your iris from getting bigger from the
  13. physics

    A lizard of mass 3.0 g is warming itself in the bright sunlight. It casts a shadow of 1.6 cm^2 on a piece of paper help perpendicularly to the Sun’s rays. The intensity of sunlight at the Earth is 1.4 x 10^3 W/m^2, but only half of this energy penetrates
  14. Physics

    A lizard of mass 3.0 g is warming itself in the bright sunlight. It casts a shadow of 1.6 cm^2 on a piece of paper help perpendicularly to the Sun’s rays. The intensity of sunlight at the Earth is 1.4 x 10^3 W/m^2, but only half of this energy penetrates
  15. science

    A video shows the objects in the solar system orbiting the sun. Why do objects orbit the sun?(1 point) The sun is releasing heat and pushing objects away. The sun is so bright that objects are forced away. The sun is moving so quickly that other objects
  16. Science

    1. Which of the following statements about the sun's structure is true? A. The sun has a solid surface. B. The sun has an interior and atmosphere. C. The sun's interior is similar to Earth's; it has a core, mantle, and crust. D. Tye sun's outermost layer
  17. Science

    1) Which of the following statements about the sun's structure is true? The sun has a solid surface The sun has an interior and an atmosphere The sun's interior is similar to the Earth's; it has a core, mantle, and crust*** The sun's outermost layer is
  18. Shalee ^~^

    1) Which of the following statements about the sun's structure is true? The sun has a solid surface The sun has an interior and an atmosphere The sun's interior is similar to the Earth's; it has a core, mantle, and crust*** The sun's outermost layer is
  19. Science

    Henri Becquerel expected to see only weak images on the photographic plate containing the uranium salt because he thought (1 point) A.fluorescent minerals needed direct sunlight to produce radio waves. B.fluorescent minerals needed direct sunlight to
  20. Urgent - physics

    Air molecules and dust particles in the atmosphere will scatter sunlight. From a consideration of the position of the sun, estimate the direction of incidence of the sun's rays on the atmosphere. In what direction will an observer on the earth's surface
  21. math grade 12

    It is a beautiful sunny day at Canada’s Wonderland. The U.V. index for this day is 8, or high, so sunscreen is a must for all people. The effectiveness of sunscreen is indicated by the sunscreen protection factor (SPF). The higher the SPF number the
  22. math

    It is a beautiful sunny day at the fair. The U.V. index for this day is 8, or high, so sunscreen is a must for all the young folk. The effectiveness of sunscreen is indicated by the sunscreen protection factor (SPF). The higher the SPF number the fewer
  23. Math

    It is a beautiful sunny day at the fair. The U.V. index for this day is 8, or high, so sunscreen is a must for all the young folk. The effectiveness of sunscreen is indicated by the sunscreen protection factor (SPF). The higher the SPF number the fewer
  24. Math

    It is a beautiful sunny day at the fair. The U.V. index for this day is 8 or higher so sunscreen is a must. The effectiveness of sunscreen is indicated by the sunscreen protection factor (SPF). The higher the SPF number the less U.V. rays can penetrate to
  25. Science

    Why are the days typically hotter in June than in December here in the US? A.Beacuse the sun gives off more light and heat in the summer B.Because the Earth is closer to the sun in the summer and farther from the sun in the winter C.because the Earth's
  26. math

    In 2001, Windsor, Ontario received its maximum amount of sunlight, 15.28 hrs, on June 21, and its least amount of sunlight, 9.08 hrs on December 21. a. Due to the earth’s revolution about the sun, the hours of daylight function is periodic. Determine an
  27. Functions - Please Help

    In 2001, Windsor, Ontario received its maximum amount of sunlight, 15.28 hrs, on June 21, and its least amount of sunlight, 9.08 hrs, on December 21. 1) Due to the earth's revolution about the sun, the hours of daylight function is periodic. Determine an
  28. math

    In 2001 Windsor Ontario will receive its maximum amount of sunlight 15.28 hrs on Jun 21 and its least amount of sunlight 9.08 hrs on Dec 21? a. Due to the earth's revolution about the sun, the hours of daylight function is periodic. Determine an equation
  29. Astronomy - Physics

    Finally, we will look at a system that is in an orbit comparable to the Earth to see how the angle that the light strikes the surface and the length of day contribute to the total amount of energy that we receive from the Sun at the two solstices. Recall
  30. Science

    A student is creating a model of a concave lens. The diagram shows her incomplete model. 1) Which action would best complete her model? A) The student should draw the light moving into the lens and then exiting in converging lines. B) The student should
  31. science

    Which statement best describes how light and lenses work together? A) Lenses change the direction of light rays by bending them. B) Lenses break up white light into the spectrum. C) Lenses cause light rays to spread apart. D) Lenses cause objects to appear
  32. Science

    A student is creating a model of a concave lens. The diagram shows her incomplete model. 1) Which action would best complete her model? A) The student should draw the light moving into the lens and then exiting in converging lines. B) The student should
  33. Chem

    The best solar panels currently available are about 13% efficient in converting sunlight to electricity. A typical home will use about 40. kWh of electricity a day. Assuming 8 hours of useful sunlight per day, calculate the minimum solar panel surface area
  34. Physics

    At the distance of the earth from the sun the pressure exerted by sunlight is avout 10^-5 Pa How much force does this pressure exerted on 10m^2 array of solar cells on a satellite when the array is perpendicular to the direction of the sunlight? If the
  35. Science

    At the distance of the earth from the sun the pressure exerted by sunlight is avout 10^-5 Pa How much force does this pressure exerted on 10m^2 array of solar cells on a satellite when the array is perpendicular to the direction of the sunlight? If the
  36. Science

    1. The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.stars would be * 3 points Captionless Image A Barnard’s Star is less bright than the sun, has a surface temperature below 3,800 K, and
  37. Science

    1. The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.stars would be * 3 points Captionless Image A Barnard’s Star is less bright than the sun, has a surface temperature below 3,800 K, and
  38. Science

    1. The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.stars would be * 3 points Captionless Image A Barnard’s Star is less bright than the sun, has a surface temperature below 3,800 K,
  39. College Statistics

    The brightness of sunlight at the earth's surface changes over time depending on whether the earth's atmosphere is more or less clear. Sunlight dimmed between 1960 and 1990. After 1990, air pollution dropped in industrial countries. Did sunlight brighten?
  40. Astronomy - Physics

    Now let us consider the length of time that the Sun is visible. Wait until the planet is at the summer solstice (12:00am). a) How many hours of daylight are there on the summer solstice with the inclination at 45 degrees? To estimate the length of day,
  41. college easy physics

    Help me out with 2 multiple questions!!!!!!!!!!!!!!!!! ASAP please What is flux in general? 1. A flow of energy, so heat is an example of flux. 2. Flowing matter such as a river or an air current. 3. Flowing energy or flowing matter. 4. An amount of energy
  42. science

    Why is the equator region the hottest part of Earth’s surface? The equator region has the widest diameter. The sun shines directly on the equator region. The rays of the sun hit the equator region at an angle. The equator region is closest to the sun.
  43. science

    Which describes the geocentric model of the solar system? a model in which Earth is at the center of the solar system a model in which Mercury is at the center of the solar system a model in which Jupiter is at the center of the solar system a model in
  44. Science

    A hurricane becomes more powerful be evaporating water from? lakes mountains oceans*** rivers 1. Over time, scientists have changed their model of our solar system. It has transitioned from A) a sun-centered to an moon-centered model. B) a sun-centered to
  45. Meteorology

    Does the Sun's rays ever make 90- degree angles to the Earth's surface in San Francisco at any time during the year? Why or why not?
  46. Mathematics

    James planted a garden. He told his friends that he planted tomatoes in 1/3 of 3/4 of the garden. Which area model represents the part of the garden that contains tomatoes? A: Model shows 1/7* B: Model shows 2/10 C: Model shows 3/10 D: Model shows 0/9 * Is
  47. physics

    The sun is 1.5 1011 m from the earth. (a) Over what surface area is solar radiation spread at this distance? (b) What is the total power radiated by the sun? (The sun delivers energy to the surface of the earth at a rate of approximately 1400 W/m2.) (c)
  48. Science

    Use this paragraph: In a scale model of the solar system, the sun is placed at the center and the planets are shown orbiting in circles around it. Mars is 1.5 AU away from the sun and in the model, it appears at 30 cm from it which means that 1 AU = 20 cm.
  49. physics

    I keep getting the wrong answer... A solar model is used to calculate the expected temperature and density at all depths within the Sun. These results are then used to calculate the expected fusion rate within the Sun. We have confidence that the model is
  50. Math - Trigonometry

    Find the value of x on this right triangle when a=20 b=5x-10 and c=2x(Square root of 5) A. x = 15 B. x = 10 C. x = 12 D. x = 16 A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the incline is the top of the wheel after the
  51. Math - Trigonometry

    Find the value of x on this right triangle when a=20 b=5x-10 and c=2x(Square root of 5) A. x = 15 B. x = 10 C. x = 12 D. x = 16 A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the incline is the top of the wheel after the
  52. Trigonometry

    Find the value of x on this right triangle when a=20 b=5x-10 and c=2x(Square root of 5) A. x = 15 B. x = 10 C. x = 12 D. x = 16 A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the incline is the top of the wheel after the
  53. science

    What causes the sunlight to hit different latitudes on Earth at different angles? the Earth's tilt on its axis the Sun's distance from Earth the Earth's speed of rotation the Sun's rate of burning fuel What climate will countries from the northern and
  54. science

    A model shows that the moon has grown to twice its size, yet it has remained in the same place. In one to two sentences, explain how this would impact the gravity between Earth and the moon.Use the scenario to answer the question. Scientists have
  55. maths

    the longest and shortest distance from sun to earths surface are r1 and r2. what is the distance from the sun when it is perpendicular to it
  56. science

    What is happening when it's Summer in North America? * A. The Northern Hemisphere is tilted away from the sun and receiving indirect sunlight. B. The Northern Hemisphere is tilted towards the sun and receiving indirect sunlight. C.The Northern Hemisphere
  57. math

    In 2001, Windsor, Ontario will receive its maximum amount of sunlight, 15.28 hrs, on June 21, and its least amount of sunlight, 9.08 hrs, on December 21. Due to the earth's revolution about the sun, the hours of daylight function is periodic. Determine an
  58. Science

    A scientist studying the effects of gamma rays on marigolds gathered the data shown below. Hypothesis: Marigolds exposed to higher levels of radiation will not grow as well as marigolds that are exposed to less radiation Plant A: Gamma Rays (Rad/day) is 5.
  59. Gravity

    If the force of gravity between the sun and the planets disappeared, what would happen to the path the planets follow? A) They would continue to rotate around the sun. B) The planets velocity would increase as it got closer to the sun. C) The speed at
  60. College Chemistry

    I am trying to figure out how many minutes are required for sunlight to travel from the Sun to Earth? Assuming the sun is 93,000,000 miles from Earth and that sunlight travels at 1.86x10 to the 5th power miles per second. These things are so tricky, i know
  61. Solar System Online Practice Unit 2 lesson 10

    1. A diagram of the solar system shows the sun in the middle. Why does every other object orbit around the sun?(1 point) A. The sun is the most massive object in the solar system. 2. A student looks at an animated model of the planets orbiting the sun.
  62. pHYSIC

    Now let us consider the length of time that the Sun is visible. Wait until the planet is at the summer solstice (12:00am). a) How many hours of daylight are there on the summer solstice with the inclination at 45 degrees? To estimate the length of day,
  63. Algebra I

    Here is the question. Medical X-rays, with a wavelength of about 10^-10m, can penetrate completely through your skin. a. Ultraviolet rays, which cause sun burn by penetrating only the top level of skin, have a wavelength about 1000 times the wavelength of
  64. Science

    A scientist studying the effects of gamma rays on marigolds gathered the data shown below. Hypothesis: Marigolds exposed to higher levels of radiation will not grow as well as marigolds that are exposed to less radiation Plant A: Gamma Rays (Rad/day) is 5.
  65. trigonometry

    a yardstick, held vertically on a level surface, cast a shadow 1 foot 8 inch long. Find the tangent of the angles that the rays of the sun make with the horizontal
  66. Triginometry

    a yardstick, held vertically on a level surface, cast a shadow 1 foot 5 inch long. Find the tangent of the angles that the rays of the sun make with the horizontal.
  67. trigonometry

    a yardstick, held vertically on a level surface, cast a shadow 1 foot 8 inch long. Find the tangent of the angles that the rays of the sun make with the horizontal.
  68. physics

    Sunlight strikes the surface of a lake at an angle of incidence of 44.5°. At what angle with respect to the normal would a fish see the Sun?
  69. physics

    Sunlight strikes the surface of a lake at an angle of incidence of 44.5°. At what angle with respect to the normal would a fish see the Sun?
  70. Physics

    No idea how to do this. All I know is E=hf and found that a is 3.96 x 10^-19 Consider a sidewalk section that has an area of 1 m^2 and assume the sun is directly overhead. Also, assuming the sun is beaming primarily green light, which has a wavelength of
  71. Physics

    The average intensity of sunlight at earth's surface is approximately 1400 W/m^2 , if the Sun is directly overhead. The average distance between the earth and the sun is 1.50E11 m. What is the average power emitted by the Sun? Ok so intensity is power over
  72. astrophysics

    1) Every second the Sun outputs 3.90* 10^26 Joules of energy. Power is energy output per unit time and is given in units of Watts (W) where 1 W = 1 Joule per second. The Sun's power output is therefore 3.90*10^26 Watts. This is called the solar luminosity.
  73. astrophysics

    1) Every second the Sun outputs 3.90* 10^26 Joules of energy. Power is energy output per unit time and is given in units of Watts (W) where 1 W = 1 Joule per second. The Sun's power output is therefore 3.90*10^26 Watts. This is called the solar luminosity.
  74. Physics pls anyone can help me? its urgent

    When the sun is in the zenith and the sky is perfectly clear, the solar power we receive on the surface of the earth is roughly 1 kW per square meter (on a horizontal surface that is normal to the direction of the sun). Calculate the average solar power
  75. Physics pls anyone can help me? its urgent

    When the sun is in the zenith and the sky is perfectly clear, the solar power we receive on the surface of the earth is roughly 1 kW per square meter (on a horizontal surface that is normal to the direction of the sun). Calculate the average solar power
  76. Physic

    Before continuing we need a little more information about the angle factor given in the formula above. It turns out that the angle factor is equal to the cosine of the angle that the light strikes the surface as measured from perpendicular. In this
  77. Physics

    A pion has rest energy 135MeV. It decays into two gamma rays that travel at the speed of light. A pion moving through the lab frame at v=0.98c decays into two gamma rays of equal energies, making equal angles θ with the direction of motion. Find the angle
  78. Physics

    A pion has rest energy 135MeV. It decays into two gamma rays that travel at the speed of light. A pion moving through the lab frame at v=0.98c decays into two gamma rays of equal energies, making equal angles θ with the direction of motion. Find the angle
  79. physics

    A pion has rest energy 135MeV. It decays into two gamma rays that travel at the speed of light. A pion moving through the lab frame at v=0.98c decays into two gamma rays of equal energies, making equal angles θ with the direction of motion. Find the angle
  80. science

    The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.Which of these observations of Barnard’s Star is most likely accurate? * Captionless Image A Barnard’s Star is less bright than the sun,
  81. Science

    Which of the following happens during a lunar eclipse? A. The moon lies between Earth and the sun. B. Earth blocks sunlight from reaching the moon’s surface. C. The moon blocks out the sun. D. The moon goes into the new moon phase. I think it is C or A.
  82. Science

    Which of the following happens during a lunar eclipse A. The Moon lies between earth and sun B. Earth blocks sunlight from reaching the moon surface C. The moon blocks out the sun D. The moon goes into a new moon phase
  83. Science

    The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.Which of these observations of Barnard’s Star is most likely accurate? * 1 point Captionless Image A Barnard’s Star is less bright than
  84. Algebra Assignment

    Please check my work on this part of the assignment. Medical x-rays, with a wavelength of about 10^-10m, can penetrate completely through your skin. a. ultraviolet rays, which cause sun burn by penetrating only the top level of skin, have a wavelength
  85. Science

    In a drawing that represents a scale model of the solar system, the sun is placed at the center and the planets are shown orbiting in circles around it. While in reality Mars is 1.5 AU away from the sun, in the model Mars appears at 30 cm from it. Neptune
  86. Chemistry

    Under appropriate conditions, molybdenum emits X rays that have a characteristis wavelength of 0.711 Angstrom. These X rays are used in diffraction experiments to dtermine the structures of molecules. How fast would an electron have to be moving in order
  87. Chemistry

    Under the correct conditions, the element molybdenum emits X-rays with a characteristic wavelength of 0.711A (7.11*10^-11m). These X-rays are used in diffraction experiments to determine molecular structures. How fast does an electron need to be moving to
  88. science

    A model of the solar system shows the sun as a loaf of bread. What size is everything else in this model? (1 point) A the size of a nickel B the size of a pile of bread crumbs C the size of a shoe D the size of a basketball
  89. AP Biology

    How many joules of sunlight hit Earth per day? I have looked everywhere and can't find an answer!! The sun emits about 4*10^26 Watt. The flux of solar energy at the Earth is thus about: F = 4*10^26 Watt/(4 pi R^2) where R = 149.6*10^9 meters is the
  90. Science

    I forgot My science book... 1. About 20% of radiation from the Sun is ___ 2. About 25% of radiation from the sun is ___ 3. About 5% of radiation from the sun ___ 4. About 50% of the sun's rays ___ 5. Absorbed Radiation is reemitted as ___ 6. Explain what
  91. physics

    Sun will turn into a red giant star one day. Today the sun has a mass of 2*10^30kg and a radius of 70km and an angular velocity of 2.85*10^-6 rad/s. How fast are the particles moving at the surface of the sun? When the sun turns into a red giant its mass
  92. Science

    Do you know how big the Sun is? The Sun is 400 times as big as the Moon and 400 times as far away. The Moon: 2.5mm diameter a) How big would the Sun be if the Moon were the size shown above? b) The Sun is actually about 865,000 miles in diameter, so 1 cm
  93. Physics

    The drawing shows an edge-on view of two planar surfaces thatintersect and are mutually perpendicular. Surface 1 has an area of 1.7 m^2, while surface 2 san area of 3.2 m^2. The electric field in the drawing is uniform andhas a magnitude of 250 N/C. Find
  94. Science

    The drawing shows an edge-on view of two planar surfaces thatintersect and are mutually perpendicular. Surface 1 has an area of 1.7 m^2, while surface 2 san area of 3.2 m^2. The electric field in the drawing is uniform andhas a magnitude of 250 N/C. Find
  95. Science

    According to the heliocentric model of the universe, which statement best describes the location of the sun?(1 point) A. The sun is located at the center of the universe. B. The sun is located closest to Earth. C. The sun is located outside of the solar
  96. Critical thinking

    In the following sentence, which words are used as adjectives? The golden rays of the bright sun reflected off the clear waters of the calm lake. A. The, of, in, clear, and calm B. The, golden, the, bright, the, clear, the, and calm C. Golden, rays, clear,
  97. Science

    1. Which of the following about the suns structure is true? A.The sun has a solid surface. B. The sun has an interior and an atmosphere. * C.The sun's is similar to Earth's; it has a core, mantle, and crust. D. The sun's outermost layer is called the
  98. Science

    PLEASE CHECK MY ANSWERS :) answers marked below 1. Which of Earth’s spheres contains most of its mass? (1 point) atmosphere *** hydrosphere geosphere biosphere 2. Erosion and weathering are examples of which types of forces? (1 point) constructive forces
  99. Geometry

    A city has a scale model of the solar system nearly 6 km long. The model's scale is 1 km : 1 billion km. a. Earth is 150,000,000 km from the Sun. How many meters apart are Earth and the Sun in the model?
  100. Physics (please help!!!!)

    Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in direct competition, that is, when the Sun, Moon and Earth are aligned with the Moon between the Sun and the Earth. This

Pages

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20