Only near the 90° meridians and at high latitudes also at all the meridians.
If by "day" is meant the solar day on Mercury, then the Sun rises twice a day near the 90° meridians, and all meridians at high latitudes.
Mercury
mercury is hard to see from the earth because it is so close to the sun. it is best to view mercury either at sun rise or sun set.
58.65 Earth daysIt depends. The orbit of mercury is very elliptical. this means that at times in it's orbit is is going faster (and nearer) the Sun than at other times. This changing speed means that when Mercury is closest to the Sun it is moving faster than it is rotating. This leads to an interesting phenominon.From a certain point on Mercury you would see the Sun rise in the east, apear to slow down and then go backwards and set again in the east. Only to rise in the east again move across the sky and set in the west. All in one day. Elsewhere on Mercury you would see the Sun set in the west and then rise from the west,then set again or you would see it rise in the east, change direction twice, and the set in the west.
100 hours
Mars is the closest. Mars orbital period is 687 days. Earth, as we all know, is 365 days. The next planet out, Jupiter, revolves around the Sun in 12 years. Saturn for information takes almost 30 years. Saturn
Mercury has a double sunrise because when the sun rises a bit, an orbital effect makes it sink down and rise again.
Mercury is the closest planet to the Sun and the eighth largest. Mercury is slightly smaller in diameter than the moons Ganymede and Titan but more than twice as massive.
Mercury is 57.9x106m from the sun.
There is no planet that can be described as "about as far" from the Sun as Mercury. It's the planet closest to the Sun, and the only other planet closer to the Sun than Earth is Venus, which is about twice the distance away from the Sun compared to Mercury. Considering that's a difference of roughly 51,000,000 km (0.32 AU, 1 AU is the average distance from the Earth to the Sun), that's one hell of a long way away. Still, it's closer than any other planet (however, even the Sun is closer to Mercury than Venus).
Mercury would experience the most frequent sunrises, as it has a day length of about 176 Earth days due to its slow rotation. This means that the sun would rise on Mercury every 88 Earth days, which is half of its orbital period around the Sun.
Tides, caused by the gravitational forces of the moon and sun on Earth, cause water levels to rise and fall twice every day. This phenomenon is known as high tide.