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Hydrogenation reactions are facilitated by the use of a transition metal catalyst such as Ni or Pt. Predict the signs of ΔH, ΔS and ΔG when hydrogen gas is adsorbed onto the surface of nickel metal under conditions of constant temperature and pressure
A scooterist is racing at a speed of 72 km per hour. If the radius of the wheel is 20 cm, find the angular speed of the wheels. Ans) 72kmph=20m/s 20cm=0.2m; v=rw w=v/r w=20/0
What is Polymorphism Polymorphism in materials science is the skill of a solid material to exist in more than one form or crystal structure. Polymorphism can potentially be fou
Q. A small telescope has an objective lens of focal length 144cm and an eyepiece of focal length 6.0cm.What is the magnifying power of the telescope? What is the separation between
a person holds of hay over his head for 30 min and gets tired . has he done some wirk or not? justify your answer
A charge of 2.00x 10 -6 C is moved against a constant electric field. If 4.50 x 10 -4 J of work is done on the charge. what is the potential difference between the initial an
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
what happened if we connect ammeter parallel to the resistor, whose current we wnt to find ,rather than in series?
speed of a car
It is jut a field of physics which is made to understand the concept of fluids better ,you may not seek the benefit right now ,but can know the concept,and the application of it in
why one side of glass has been coated with silver..?
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