Yes.
-- 'Acceleration' does NOT mean 'speeding up'.
It means ANY change in the speed OR direction of motion ...
speeding up, slowing down, or turning.
-- If an object is NOT moving in straight line at constant speed,
then its motion is accelerated.
-- In circular motion, or even just going around a curve,
the object is accelerating, because its direction is constantly
changing, even if its speed is constant.
B. It reflects light rays outward.
A convex mirror looks like this ⊂. So when light rays hit the outward curves, it bends the light rays outwards, and backwards, and it would appear to be coming from its center called the focus.
A person should power walk 30-45 min a day
Answer:
At what time of day would you expect the New Moon to rise?
A) Midnight
B) Sunset
C) Noon
D) Sunrise
An HR diagram is a plot of:
A) Luminosity versus apparent magnitude.
B) Absolute magnitude versus luminosity.
C) Absolute magnitude versus surface temperature.
D)Apparent magnitude versus color index.
E) Color index versus surface temperature.
What is the most easily visible manifestation of the Earth's magnetic field?
A) The Van Allen radiation belts
B) The magnetopause
C) The aurorae
D) There is no easily visible manifestation of the Earth's magnetic field.
For a lunar eclipse (the moon is obscured from view), which phase is necessary?
A) third quarter
B) new moon
C) first quarter
D) full moon
Answer:
The nail penetrates into the frame by 1.875 inches
Explanation:
For an 8d nail, it has a length of 2.5 inches, a diameter of 0.13 inches and a head diameter of 0.28125 inches. 8d nails in buildings are used in attaching studs to wall plate, rafter to top wall plates. It is also used when you need to drive a nail at an angle into a wood member.
Since the depth of an 8d nail is 2.5 inches and the sheathing is nailed on the wood frame, to get how far the point of the nail penetrate into the frame, we subtract the depth of the oriented strand board sheathing from the depth of an 8d nail.
Therefore, how far the point of the nail penetrate into the frame = 2.5 inches - 5/8 inches = (2.5 - 0.625) inches = 1.875 inches.
The nail penetrates into the frame by 1.875 inches