Physics Answers

A man of mass 50kg ascends a flight of stairs 5m high in 5 seconds. If accelerator due to gravity is 10m-2. Calculate the power expended.

To keep a vehicle moving at a constant speed "V" require power "P" from the engine. The force provided by the engine is?

Calculate the Directional derivative of Scalar field f(x,y,z)= x²+yz+z² at p (1,2,1) along n normal unit vector = 1/3 ( 2 i certisian unit vector- j certisian unit vector+ 2k certisian unit vector)

calculate the directional derivative of scalar field f(x,y,z)=(x ²+yz+z²)at (1,2,1) along n^=1/3(2i-j+k^)

Suppose that two quantities A and B have different dimensions. Determine which of the following arithmetic operations could be physically meaningful: (i) A+B (ii) A/B (iii) B-A (iv) AB

Given the wave equation y(x, t) = 2.0 Sin(3.0x – 4.0t + π

2

)m, where x is

in meter and t is in second. Find the:

a. Amplitude

b. Frequency

c. Wavelength

d. Speed

e. Initial height at x=1.0m

Write a detail note on Atomic structure

What is the pressure of 9000 ft below the ocean surface?

Two sailors are at the tops of their ships’ masts in the open ocean. The mast of ship A is twice as high as that of ship B. How much farther can sailor A see than sailor B? a) no farther

b) a little more than 40% farther

c) twice as far

d) almost three times as far

e) four times as far

Please give me full explanation how to answer this question.

I want to know it for necessary.

Thank you so much.

. a force of 100N is applied to the rim of the pulley wheel of diameter 200mm. Solve for the torque.