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Explain Scalars and Vectors This is one of the harder ideas to get used to when you start learning physics. The trick is to see that there is one basic difference between a sca
Vector Direction The significance of 'direction' could be seen in the dissimilarity among velocity and speed. In physics, speed is a pure scalar or something along with a magni
A machine gun fires a bullet of mass 40 g with a velocity 1200 m/s The man holding it, can exert . a maximum force of 144 N on the gun. How many bullets can he fire per second at
Q. Why X-rays are not used in microscopes? 1) The wavelength of X-rays is slighter than that of the visible light. 2) X-rays can't be focussed as visible radiations are foc
.how can we prove that sn=u+a(1/2)
role of friction in snow?
A man exerts a force of 310 N on a lever to raise a crate with a mass of 910 kg. If the efficiency of the lever is 78 percent, what is the lever's IMA?
Suppose Fluid (say, water) occupies a domain D and has velocity field V=V(x, t). A substance (say, a day) is suspended into the fluid and will be transported by the fluid as well
a uniform sphere of mass 2kg is kept in a fixed position by two strings AB and CD. AB is horizontal and CD is inclined at 30° to the vertical. calculate the tension in each string.
Aiming at the Monkey - Fast Assume a zookeeper must shoot a banana from the banana cannon to a monkey who hangs from the limb of a tree. That particular monkey has a habit of d
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