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A 1.50kg object hangs motionless from a spring with a force constant of k=250N/m how far is the spring stretched from its equilibrium length?
A 5.0m long ladder who weighs 180N rests against a vertical wall, making an angle of 53 degrees with the ground. When a person who weighs 800N climbs this uniform ladder and stops one-third of the way up the ladder. Find the normal and frictional forces on the ladder at its base.
The standard enthalpy of the reaction: CO(NH2)2(s) + H2O(l) - CO2(g) + 2 NH3(g) is -133.42 kJ/mol. Calculate
the standard enthalpy of formation of urea, CO(NH2)2(s)
The total potential energy of a system of two atoms is given by
U =(−p/r³)+(q/r^6)
The atoms form a stable bond at a bond length of 3.2 Å with the release of 12 eV.
a) Calculate p and q.
b) Determine the critical distance.
• At critical separation, force is maximum
c) Find the force needed to dissociate this molecule.
Given that the potential energy of a pair of atoms in a solid is raised by 1 eV when their
separation is changed by 1Å, calculate the macroscopic elastic modulus of the lattice.
If you leave your house at 2.47pm
and travel for one and three quarter
hours, what time will you arrive at your
destination?
NASA is expected to send a 2600-kg satellite 450 km above the earth’s surface.What speed will it have?(Hint: Earth’s mass is 5.97 x 1024 kg)
what is the direction of the electric field at the test point on the "-x-" axis , 50cm from the charge q=-5.00 nC which is located at the origin a. eastward b.westward c.northward d.southward
Compare the apparent frequencies of a 2450 Hz source moving away from you at 25m/s and when you are moving away from the source at 25mLs
A simple pendulum of length 60.0 cm takes to make 12 complete back and forth motion.
(A) find it's period. (B) what will be it's period when it's Length is increased to 240.0 cm
