In calculus, neglecting air resistance, the formula for range is R = v(0)^2 sin 2A/g, where v(0) is the initial speed, A is the angle, and g is the acceleration of gravity. Here v(0) = 20 m/s, and g is a constant.
<span>R = 400 sin 2A </span>
<span>For maximum range, sin 2A = 1, so 2A= 90°, and A= 45
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45 degrees is my answer.</span>
speed of the participants is given as
now the kinetic energy of the participant is given as
As we know that
1 calorie = 4.2 J
so here 230 Calorie is provided by 1 bar
bar required is
At resonance, a standing wave is produced, and is one in which two waves superimpose to produce a wave that varies in amplitude but does not propagate, forming a single wave of one frequency, wavelength, and speed. The resultant wave has a higher amplitude.
<span>The right answer is B) It has a greater amplitude.</span>
Coastal areas experience two low tides and two high tides every lunar day, or 24 hours and 50 minutes. The two tidal bulges caused by inertia and gravity will rotate around the Earth as the moons position changes. These bulges represent high tides while the flat sides indicate low tides.
Over the course of 1 day, the position of the moon does not change very much compared to the rotation of the earth. As the earth rotates below the moon, one point on the earth will go through all levels of tide as the day passes by. Strongly attracted, middling, weakly attracted, and then middleagain. From our perspective it looks like "high, low, high, low." Or equivalently you can think about how the points below the moon and opposite the moon will be high tide, and as the earth rotates, those areas will change.
Forces cause acceleration, not motion. The law of action-reaction (Newton's third law) explains the nature of the forces between the two interacting objects. According to the law, the force exerted by object 1 upon object 2 is equal in magnitude and opposite in direction to the force exerted by object 2 upon object 1.
