Other Physics Answers

When a glass is rubbed with a silk cloth, the rod acquires a charge of magnitude 3.45 nC. (a) Did the glass rod gain or lose electrons/ (b) How many electrons were transferred during the process? (c) What is the change in the mass of the glass rod? (d) What is the change in the mass of the silk cloth?

A 0.0450-𝑘𝑔 golf ball initially at rest is given a speed of 25.0 𝑚/𝑠 when a club strikes it. If the club and ball are in contact for 2.00 𝑚𝑠, what average force acts on the ball? Is the effect of the ball’s weight during the time of contact significant? Why or why not?

Calculate the magnitude and direction of the electric field at a point P which is 30 cm to the right of a point charge Q = -3.0 x 10-6 C

What is the force acting on a 5m² wall by normal atmospheric pressure at sea level (101kPa)?

What force must be applied to a surface area of 0.5m² to produce a pressure of 2.3×10⁵Pa?

A 60-cm tall glass is filled with water to a depth of 40cm.What is the pressure at the bottom of the glass?

A sample of unknown material weighs 450N in air and 300N when submerged in water with a density of 1000kg/m³.What is the density of the material?

Find the mass of 3 liters of water. Show your solution

1.The intensity of sound is found to be 7.3×10^-5 Wm^-2 at3.5m.Find the soind intensity if the observer is:

a. 2m

b. 5m

c. 10m

2.Solve for the power in problem number 1 (a,b,c)

1.A string is 1.2m long.If the wave speed is 400m/s.Find the

a.first harmonic

b.second harmonic

c.third harmonic

d.fourth harmonic

e.tenth harmonic

2.Find the wavelength of each harmonic in problem 1.

a.first harmonic

b.second harmonic

c. third harmonic

d.fourth harmonic

e.tenth harmonic