Other Physics Answers

A 1.50kg object hangs motionless from a spring with a force constant of k=250N/m.how far is the spring stretched from it equilibrium length

The total potential energy of a system of two atoms is given by

U=-p/r³ + qr-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

What is the shortest distance in which an automobile travelling on a 100km/hr can be stopped. (a) when the friction between the tyre and the road is 0.5 (b) on a wet day when the coefficient of friction is only 0.3

(c) The foothaller kicked the ball and it was caught by the opposing goalkeeper, 4

metres above the ground. The ball was travelling at 10 ms-¹

(i) Calculate the potential energy of the ball just before it was caught.

the slope of velocity versus time graph is displacement

NASA is expected to send a 2600-kg satellite 450 km above the earth’s surface. (a) What is its radius? (b) What speed will it have? (Hint: Earth’s mass is 5.97 x 1024 kg)

A ray of light makes an angle of 35ø with a plane mirror .what is the angle of reflection

determine the value of E in a material for which the electric susceptibility is 3.5 and p = 2.3 x 10 x 87 C/m^2

A planet with a mass of 5.51x10²⁴kg and a radius of 6.36x10⁶m orbits its sun, a distance of 139.4x10⁹m away, in a uniform circular motion with velocity 3.42x10⁴m/s. Assuming the planet is a uniform solid sphere spinning on its axis and has the same length of day as Earth, what is the orbital angular momentum of this planet (in kg⋅m²/s)?

A metal bar is of length 2.0m and has a square cross-section of side 40mm. when a tensile

force of 80KN is applied, it extends by 0.046mm. Calculate (a) the stress (b) the strain in the

specimen