Physics Answers

One section of a pipe is 2.5cm in diameter, horizontal, and 1m above ground level. This section is connected to a second horizontal section at ground level which is 5cm in diameter. In the elevated section, the velocity of flow of water is 2m/s and the pressure is 1.4×10sN/m². Calculate (a) the velocity of flow in the lower section (b) the pressure in the lower section,and (c) the rate of flow of water through the pipe in kilograms per seconds.

Anna and her 40 kg classmate, Maria is 3.00 x 10 -8 N.

Determine the mass of Anna if they are 2.0 m away from each other.

2. A sinusoidal alternating voltage has an r.m.s. value of 200 V and a frequency of 50 Hz. It crosses the zero axis in a positive direction when t = 0

Determine (i) the time when voltage first reaches the instantaneous value of 200 V and (ii) The time when voltage after passing through its maximum positive value reaches the value of 141.4 V.

Ganymede is one of the many moons of Jupiter. Ganymede's period of revolution around Jupiter is 7.16 Earth days and an orbital radius about 1.07x10^9 meter. Find the mass of the Jupiter

a Christmas ball in a shape of hollow sphere is hung from the tree by a piece of thread attached to the surface of the ball. the mass and radius of the ball are 0.105kg and 0.12m, respectively what will be its period of oscillation when slightly displaced from its equilibrium position.

The following data were collected during a short race between two friends. Velocity (m/s) 0 0.5 1 1.5 2 2 4 6 2 0 Time (s) 0 2 4 6 8 10 12 14 16 18 a) Describe the different sections of the graph. b) Determine the acceleration over the first eight seconds. c) Determine the maximum acceleration. d) Using the graph calculate the displacement: i) over the first eight seconds ii) the total race. e) Find the maximum velocity reached by the runner.

What is the relationship between distance and height with regards to the coefficient of static friction?

What is the relationship between the Block + Mass and Weight hanger + Mass with regards to coefficient of friction?

Atoms combine to form

A beam of x-ray photon with a wavelength of 0.750 nm strikes a free electron in a sample. The recoiling electron moves away at 1.60 x 106 m/s. a) Determine the Compton shift in the photon’s wavelength. b) Compute the angle through which the photon is scattered.