Answer:
56 N
Explanation:
There are only two forces acting on the package:
- The force of gravity, directed downward, equal to
where m is the mass of the package and g is the acceleration due to gravity
- The air resistance, acting upward, let's label it with 
According to Newton's second law, the resultant of the two forces must be equal to the product between the mass, m, and the acceleration, a:
where we have:
m = 20.0 kg
g = 9.8 m/s^2
a = 7.0 m/s^2 is the acceleration when the package is at 25 m above the ground.
Substituting into the equation, we can find the magnitude of the air resistance at that altitude:
The correct answer is C. They are pointing right to left.
Explanation.
A magnet has two poles, a north pole and a south pole. When dealing with magnets, we define the concept of a magnetic field. A magnetic field represents the effect of the magnet on magnetic materials and moving charges in the space around the magnet. For every magnet, the magnetic field lines always point away from the north pole of the magnet towards the south pole. Since the north pole of this magnet faces right, the magnetic field lines point towards the left.
The correct answer is C. They are pointing right to left.
Answer:
The alkaline earth metals (beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra)) are a group of chemical elements in the s-block of the periodic table with very similar properties: shiny. silvery-white. somewhat reactive metals at standard temperature and pressure.
