# On a clear day at the equator with the sun directly overhead, how long would it take to warm 10 kg of water 15 Co if the emissivity of the 1.0 m 2 surface is 1? can someone help me

45,547 results
1. ## Science

What directly causes the pressure difference between the equator and the poles?(1 point) the rotation of Earth on its axis the length of each season the direction where wind blows the amount of heat in each area Why is the equator region the hottest part

2. ## One more thing!

Day had broken cold and gray, exceedingly cold and gray, when the man turned aside from the main Yukon trail and climbed the high earth-bank, where a dim and little traveled trail led eastward through the fat spruce timberland. It was a steep bank, and he

3. ## science

find the gravitational force exerted by the sun on a 70 kg man located at the earth's equator a)at noon when the man is closest to the sun. b)at midnight when he is futherst from the sun. c)calculate the diferrence in gravitational acceleration due to the

4. ## 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.

5. ## Physics

1. Gunter, the weightlifter, can lift a 230.0 kg barbell overhead on Earth. The acceleration due to gravity on the sun is 274 m/s2. 2. a. Would the barbells be heavier on the sun or on the Earth. heavier on the sun b. How much (in Newtons) would the

6. ## Physics help quick!

22. What does it mean for a force to act in accordance with an inverse square law? The square of the force is inversely proportional to the distance. The force decreases if the distance increases. The force is directly proportional to 1/r2 where r is the

7. ## physics

When the Sun is directly overhead, a hawk dives toward the ground at a speed of 6.97 m/s. If the direction of his motion is at an angle of 34.1 below the horizontal, calculate the speed of his shadow along the ground. Answer in units of m/s

8. ## Physics

"An airplane is climbing at an angle of 15 degrees to the horizontal with the sun directly overhead. The shadow of the airplane is observed to be moving across the ground at 200 km/h. How long does it take for the plane to increase its altitude by 1000 m"?

9. ## Science

Could someone check my answers? Please and thank you! At which latitude would you more often have the sun striking the ground at a high angle? a) 60°S b) 0° (the equator) - my answer c) 90°N (the North Pole) d) 30°N In which climate would the sun be

10. ## Calculus

The sun is passing directly over an 80ft. tall building. The shadow is 60ft. long when the angle (theta) that the sun makes with level ground is increasing at the rate of .327 radians per minute. At what rate is the shadow decreasing. (express your answer

11. ## Science

How long would a day be in seconds if the Earth were rotating so fast that objects at the equator were apparently weightless?

12. ## physics

A satellite with a mass of ms = 7.00 × 103 kg is in a planet's equatorial plane in a circular "synchronous" orbit. This means that an observer at the equator will see the satellite being stationary overhead (see figure below). The planet has mass mp =

13. ## WEATHER SCIENCE SOS! I NEED ANSWERS CHECKED! SOS

How does latitude affect climate? a.) Areas near the equator have cooler climates than areas far from the equator. b.) Areas near the equator have warmer climates than areas far from the equator.*** c.) areas near the equator have 4 seasons.*** d.) areas

14. ## Physics

At ground level g is 9.8m/s^2. Suppose the earth started to increase its angular velocity. How long would a day be when people on the equator were just 'thrown off'? Why is the expression 'thrown off' a bad one?

15. ## 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

16. ## Honors Physics 1

When the Sun is directly overhead, a hawk dives toward the ground at a speed of 4.26 m/s. If the direction of his motion is at an angle of 35.7◦ below the horizontal, calculate the speed of his shadow along the ground. Answer in units of m/s.

17. ## physics

During takeoff, an airplane, climbs with a speed of 180 m/s at an angle of 34º above the horizontal. The sun is shining directly overhead. How fast is the shadow of the plane moving along the ground? (That is, what is the magnitude of the horizontal

18. ## Math

A pine tree stands 10 meters tall but due to a windstorm it is leaning at a 60 degree angle with the ground. Find an exact expression for the length of the shadow of the tree when the sun is directly overhead.

19. ## math, calculus

On a day when the sun passes directly overhead at noon, a 1.80-m-tall man casts a shadow of length S(t)=1.8|cot(πt/12)|, where S is the length of shadow in meters and t is the number of hours since 6am, at what time from the following list the length of

20. ## Geometry

Eratosthenes knew that in Aswan the sun was directly overhead at noon on the summer solstice. At the same time, he measured the angle of the sun to a vertical line in Alexandria. He found this angle to be one(1/50) fiftieth of a circle a. What was

21. ## art

In the summer, you're assigned to take a photograph of a lighthouse. It's essential that the color of the photograph be "cool". the best time of day for you to take the photo would be A.7:00AM B.11:00 AM C.12:00Pm D. 3:00PM 11, 12 and 3 are in the full

22. ## physics

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a

23. ## Physics

The power radiated by the sun is 3.90 1026 W. The earth orbits the sun in a nearly circular orbit of radius 1.50 1011 m. The earth's axis of rotation is tilted by 27° relative to the plane of the orbit (see the drawing), so sunlight does not strike the

24. ## Language arts

Use the excerpt to answer the question 1. Which is the best paraphrase of the lines from the poem A. We are happy when the sun is shining we feel Mary when the bells ring and we sing along the sun goes down and we have to stop playing sports. B. The sun

25. ## Physics

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration

26. ## Ap Physics

On a clear day at the equator with the sun directly overhead, how long would it take to warm 10 kg of water 15 Co if the emissivity of the 1.0 m 2 surface is 1? can someone help me work this out?

27. ## 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

28. ## Phyics Toughest question on earth

Estimate the time difference between the longest day and the shortest day of a year in seconds if you lived on the Earth's equator with the assumptions below. Note: this is not the difference between solstices as we are adjusting the earth's rotation axis

29. ## calculus

If the sun rises at 6 AM and is directly overhead at 12 noon, estimate the time (hour and minutes) when a 34-foot tree will have a 24-foot shadow.

30. ## physics

When the Sun is directly overhead, a hawk dives toward the ground with a constant velocity of 5.20 m/s at 51.5° below the horizontal. Calculate the speed of her shadow on the level ground.

31. ## science

(a) at what times of year are the periods of daylight and darkness the same everywhere on the earth? What are these times called? (b) Where is the noon sun directly overhead at these times?

32. ## Stats

I have a test on this tomorrow and I swear he didn't teach this and the book's not helping either, so maybe u can: A hwy engineer knows that his crew can lay 5 miles of hwy on a clear day, 2 miles on a rainy day, and only 1 mile on a snowy day. Suppose

33. ## physics

The orbit of Halley's Comet around the Sun is a long thin ellipse. At its aphelion (point farthest from the Sun), the comet is 5.1 1012 m from the Sun and moves with a speed of 12.0 km/s. What is the comet's speed at its perihelion (closest approach to the

34. ## check geo

the use of haevy farm machinery tilling and clear cutting: A)allows farmers to reuse thier lands for decades B)causes rain forest to grow back in record numbers C)has been banned in most parts of the region scince 1995 D)causes soil erosuon and

35. ## Physics

When the Sun is directly overhead, a hawk dives toward the ground at a speed of 2.18 m/s. If the direction of his motion is at an angle of 25.1◦below the horizontal, calculate the speed of his shadow along the ground. Answer in units of m/s

36. ## physics

When the Sun is directly overhead, a hawk dives toward the ground at a speed of 3.07 m/s. If the direction of his motion is at an angle of 57.2 ◦ below the horizontal, calculate the speed of his shadow along the ground. Answer in units of m/s

37. ## physics

An airplane traveling a constant 100.0 m/s is to drop supplies to flood victims isolated on a patch of land 200.0 m below. A) The supplies should be dropped how many seconds before the plane is directly overhead? B) What is the distance of the plane away

38. ## physics

A communications satellite is in an orbit that is 3.1 multiplied by 107 m directly above the equator. Consider the moment when the satellite is located midway between Quito, Equador, and Belem, Brazil; two cities almost on the equator that are separated by

39. ## Science

At ground level g is 9.8m/s^2. Suppose the earth started to increase its angular velocity. How long would a day be when people on the equator were just 'thrown off'? Why is the expression 'thrown off' a bad one?

40. ## Electrical Engineering

Find the latitude at Stanford University using Google Maps to the nearest degree (This is how you do it) and calculate the Air Mass Factor on the autumnal equinox (when the center of the sun is in the same plane as the equator of the earth) at noon (when

41. ## geometry

Earth completes one full rotation each day, making the Sun appear to rise and set. If the Sun passes directly overhead, by how many degrees does its position in the sky change every hour?

42. ## need HELPwith 2 questions!!

How long is day and how long is night? Does the sun come up in the morning all over the world? Explain please help me I only need: How long is day and how long is night? Does the Sun come up in the morning all over the world? Please explain to me. At any

43. ## physical science

At noon on September 21, the Sun is directly overhead at a latitude of

44. ## heeeeeeeeeeeelp physics vrey tough

Estimate the time difference between the longest day and the shortest day of a year in seconds if you lived on the Earth's equator with the assumptions below. Note: this is not the difference between solstices as we are adjusting the earth's rotation axis

45. ## Astronomy

1. Imagine that the Earth¡¦s spin were to be reversed, so that the planet rotated about its axis from East to West, at the same rate at which it now rotates from West to East. If Earth¡¦s orbital motion about the Sun were unchanged, which of these

46. ## physics

An eagle dives toward the ground with a constant velocity of 4.20 m/s at 50.0° below the horizontal. The Sun is directly overhead and casts a shadow of the eagle directly below it. What is the speed (in m/s) of its shadow on level ground?

47. ## heeeeeeeeeeeelp physics

Estimate the time difference between the longest day and the shortest day of a year in seconds if you lived on the Earth's equator with the assumptions below. Note: this is not the difference between solstices as we are adjusting the earth's rotation axis

48. ## geometry

EARTH COMPLETES ONE FULL ROTATION EACH DAY MAKING THE SUN APPEAR TO RISE AND SET. IF THE SUN PASSES DIRECTLY OVER HEAD, BY HOW MANY DEGREES DOES ITS POSITION IN THE SKY CHANGE EVERY HOUR?

49. ## physics

When the Sun is directly overhead, a hawk dives towards the ground with a constant velocity of 5.1 m/s at 45° below the horizontal. Calculate the speed of its shadow on the level ground. m/s

50. ## physics

If the rotation of a planet of radius 3.41 × 106 m and free-fall acceleration 8.71 m/s2 increased to the point that the cen- tripetal acceleration was equal to the gravita- tional acceleration at the equator, what would be the tangential speed of a person

51. ## Physics

Suppose there's a collison way out in the Oort cloud, say 30,000 AU away from the Sun. This collison causes one of the comets to alter its orbit and head almost directly at the Sun, such that the comet just skims the surface of the Sun and heads back out

52. ## physics

The altitude of a hang glider is increasing at a rate of 7.35 m/s. At the same time, the shadow of the glider moves along the ground at a speed of 14.5 m/s when the sun is directly overhead. Find the magnitude of the glider's velocity.

53. ## physics

You are lying on the beach on a tropical island on the equator, watching the Sun set - what a beautiful scene! Immediately after the top of the Sun disappears, you stand up to watch the Sun set again. After the amount of time t=10 s the top of the Sun

54. ## physics

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the speed and centripetal

Radiation from the sun keeps us alive, but with the thinning of the ozone layer, it is important to limit exposure. Most of us know that the sun is far more intense at the equator than at the poles. The relationship between the intensity of radiation with

56. ## Geography

If the sun is directly overhead at 12 noon at yur location and GMT (Greenwich Mean Time) is 10:00pm, what is your approximate longitude? I think it's 135 degrees West, help me check. it was Noon at Greenwich ten hours ago, so you are 10/12 * 180 degrees,

57. ## application programmin

I need to write code in Visual Basics 2012 for a grading system. I can do most of it but I don't know how to make it see missing grades. Also when they fail a grade the background turns red but when I clear the boxes it stays red this is my clear: Private

58. ## high school

The weather during Smedley's vacation was strange -- It was cloudy on 13 different days but it was never cloudy for an entire day -- Cloudy mornings were followed by clear afternoons -- Cloudy afternoons were proceded by clear mornings ---There were 11

59. ## LANGUAGE HELP ME POETRY

The sun does arise, And make happy the skies. The merry bells ring To welcome the Spring. The sky-lark and thrush, The birds of the bush, Sing louder around, To the bells cheerful sound. While our sports shall be seen On the Echoing Green. Till the little

60. ## physics

A communications satellite is in a synchronous orbit that is 3.00 107 m directly above the equator. The satellite is located midway between Quito, Equador, and Belem, Brazil; two cities almost on the equator that are separated by a distance of 3.10 106 m.

61. ## Physics

During takeoff, an airplane climbs with a speed of 180 m/s at an angle of 34° above the horizontal. The speed and direction of the airplane constitute a vector quantity known as the velocity. The sun is shining directly overhead. How fast is the shadow of

62. ## Physics/trig

During takeoff, an airplane climbs with a speed of 300 m/s at an angle of 36 degrees above the horizontal. The speed and direction of the airplane constitute a vector quantity known as the velocity. The sun is shining directly overhead. How fast is the

63. ## Physics

During takeoff, an airplane climbs with a speed of 110 m/s at an angle of 44 degrees above the horizontal. The speed and direction of the airplane constitute a vector quantity known as the velocity. The sun is shining directly overhead. How fast is the

64. ## Physics

At ground level g is 9.8m/s^2. Suppose the earth started to increase its angular velocity. How long would a day be when people on the equator were just 'thrown off'? Why is the expression 'thrown off' a bad one ?

65. ## Physics

When the sun was directly overhead in Syene, why was it not directly overhead in Alexandria?

66. ## 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

67. ## Math Geometry

The sun rises at 6am; At noon the sun is directly overhead. The height of a pole is 8m tall. What is the length of the shadow at 11am?

68. ## sdvfsd

The earth has a specific tilt to it. No the sun appears to move towards the north and the south but through all the time the rays of the sun fall directly at the equator but fall at an inclined level at the other places and hence the seasons change and

69. ## Science

When the Sun is directly over the equator, we experience either _ or _ ? I'm not getting this. Do they mean what two seasons?

70. ## GLOBE ACTIVITY

If the sun is directly overhead at 12 noon at your location and GMT (Greenwich Mean Time) is 10:00 pm, what is you approximate longitude?

71. ## meteogology

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

72. ## Science

On the spring equinox, in what part of the sky and what time of day does the full moon rise? March 20th is the Spring Equinox for the northern hemisphere, the time of year when the sun is at zero degrees longitude and latitude on the ecliptic, and the

73. ## Science

I am reading about partial solar eclipses, and my book has this warning: CAUTION:Looking directly at even a tiny sliver of the sun during a solar eclipse can damage your eyesight permanently. Why do they give this warning specifically for eclipses? Is the

74. ## PreCalc

The sun rises at 6 AM and is directly overhead at noon, estimate the time (hour and minutes) when a 34-foot tree will have a 14-foot shadow.

75. ## physics

When the Sun is directly overhead, a hawk dives toward the ground with a constant velocity of 4.45 m/s at 61.5° below the horizontal. Calculate the speed of her shadow on the level ground.

76. ## Physics

Two molten rocks fly directly toward each other in outer space. One rock has a mass of 883 kilograms and is moving directly toward the Sun at a velocity of 555 meters per second. The second rock has a mass of 983 kilograms and is moving directly away from

77. ## Trigonometry

If a stake is placed in the ground and is 20cm. high and casts a shadow 12.5 cm. long, what time is it? (The sun rises at 6 a.m. and is overhead at noon.)

78. ## Physics

When the Sun is directly overhead, a hawk dives toward the ground at a speed of 6.09 m/s. If the direction of his motion is at an angle of 78.6 â—¦ below the horizontal, calculate the speed of his shadow along the ground. Answer in units of m/s

79. ## Science

When a jet aircraft flies overhead on a clear day, you can see a trail of water vapour, called a contrail, in it's path. Which type of cloud does this contrail resemble?

80. ## PHYSICS(HELP)

A satellite with a mass of ms = 7.00 × 103 kg is in a planet's equatorial plane in a circular "synchronous" orbit. This means that an observer at the equator will see the satellite being stationary overhead (see figure below). The planet has mass mp =

81. ## Physics circular motion

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a

82. ## physics??

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a

83. ## Physics

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration

84. ## Physics

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration

85. ## GLOBE/GEOGRAPHY HELP

If the sun is directly overhead at 12 noon at your location and GMT (Greenwich Mean Time) is 10:00pm, what is your approximate longitude? Check this site to see what place is 10 hours behind London and the GMT. (Broken Link Removed) Then, you can use a map

86. ## Physics

at ground level g is 9.8m/s^2 suppose the earth starts to increas its angular velocity how long would a day be when people on the equator were just thrown off

87. ## Science

I am reading about partial solar eclipses, and my book has this warning: CAUTION:Looking directly at even a tiny sliver of the sun during a solar eclipse can damage your eyesight permanently. Why do they give this warning specifically for eclipses? Is the

88. ## high school algebra

The weather during Smedley's vacation was strange -- It was cloudy on 13 different days but it was never cloudy for an entire day -- Cloudy mornings were followed by clear afternoons -- Cloudy afternoons were proceded by clear mornings ---There were 11

89. ## Math

The weather during Smedley's vacation was strange -- It was cloudy on 13 different days but it was never cloudy for an entire day -- Cloudy mornings were followed by clear afternoons -- Cloudy afternoons were proceded by clear mornings ---There were 11

90. ## Math

The weather during Smedley's vacation was strange -- It was cloudy on 13 different days but it was never cloudy for an entire day -- Cloudy mornings were followed by clear afternoons -- Cloudy afternoons were proceded by clear mornings ---There were 11

91. ## English

From the echoing green by William Blake the sun does arise and make it happy the skies the Mary bells ring to work on the spring the Skylark and thrush The birds of the bush Sing louder around to the bells cheerful sound while our sports shall be seen on

92. ## 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,

93. ## Physical Science

an airplane is flying at 600km/h at an altitude of 2.0km. When the sound of the airplane's engines seems to someone on the ground to be coming from directly overhead, how far away is she from being directly below the airplane?

94. ## physics

During takeoff, an airplane climbs with a speed of 140 m/s at an angle of 42 degrees above the horizontal. The speed and direction of the airplane constitute a vector quantity known as the velocity. The sun is shining directly overhead. How fast is the

95. ## physics

During takeoff, an airplane climbs with a speed of 120 m/s at an angle of 33 degrees above the horizontal. The speed and direction of the airplane constitute a vector quantity known as the velocity. The sun is shining directly overhead. How fast is the

96. ## Physics

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. (a) Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed of a person situated at

97. ## Another astronomy (algebra-based physics) question

I’d prefer thorough solutions, but if you can only provide formulas that would solve each part of the problem, that’d be helpful too :-) Thanks! Spinning too fast The rate of rotation of astrophysical objects that are held together by gravity (e.g.,

98. ## Physics

at ground level g is 9.8m/s^2 suppose the earth starts to increas its angular velocity how long would a day be when people on the equator were just thrown off ?why is the expression thrown off a bad one ?

99. ## physics

At ground level g is 9.8m/s^2.suppose the Earth started to increase it's angular velocity. How long would a day be when people on the equator were just 'thrown off' ? why is the expression 'thrown off' a bad one?

100. ## geography

Thank You and I did some more questions. Can you check them? 1. Is the Antarctic Circle north or south of the equator? South of the equator 2. All lines of longitude are measured east and west of what imaginary line? The Prime Meridian. Ms. Sue the 9th