Hydrogen is an element made of two or more kinds of atoms. Hydrogen is a compound made of only one kind of atom.
Explanation:
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Answer:
T = (3μmg - Fcosθ)/2
Explanation:
Since the boxes move to the right, the net force on box of mass 2m is
Fcosθ - 2μmg + T = ma (1)where Fcosθ = horizontal component of applied force, 2μmg = frictional force and T = tension in string and a = acceleration of box
The net force on the box with mass m is
μmg - T = ma (2) where μmg = frictional force, T = tension and a = acceleration of boxes.
Equating (1) and (2) we have
Fcosθ - 2μmg + T = μmg - T
collecting like terms
Fcosθ - 2μmg - μmg = -T - T
Fcosθ - 3μmg = -2T
(3μmg - Fcosθ)/2 = T
T = (3μmg - Fcosθ)/2
Answer:
Explanation:
the weight of the telescope decreases because the moon attract the body with less force as compared to earth due to less gravity as compared to earth
The man is standing on the plank. Then he is pulling the rope towards himself. He pushes the plank forward with the legs so that he can pull the rope backwards.
The man is standing on the plank. Then he is pulling the rope towards himself. He pushes the plank forward with the legs so that he can pull the rope backwards. So the friction f acts in the forward direction for the plank. Also f acts in the opposite direction on the man. The tension T in the rope is 100 N (given). Let the friction force = f Newtons.
The man is standing on the plank. Then he is pulling the rope towards himself. He pushes the plank forward with the legs so that he can pull the rope backwards. So the friction f acts in the forward direction for the plank. Also f acts in the opposite direction on the man. The tension T in the rope is 100 N (given). Let the friction force = f Newtons.Let the common acceleration = a m/s^2
Man: <em>net force = T - f = m a = 50 a </em>
<em>net force = T - f = m a = 50 a </em>
<em>Plank: net force = T + f = m a = 100 a</em>
<em>net force = T - f = m a = 50 a </em>
<em>Plank: net force = T + f = m a = 100 a</em>
<em>As T = 100 N, a = 4/3 m/s^2 and f = 100/3 Newtons. </em>
[correct me if I'm wrong]:)
Cause: sewage dumped in rivers,disease spread, and industrial waste dumped into rivers
Effect: fish die off, destroyed habitats, oil spills on land that mixes with run off
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