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A 1.0 kg object is brought to planet Mercury (g = 3.7 m/s/s). where the acceleration due to gravity is 0.38 times its value on Earth.
The relationship between kinetic energy of an object and the work done by the force(s) acting on it, called the work–kinetic energy theorem, is expressed formally as:
"\\Delta"K ≡ K - K0 = W
Why is this symbol ( ≡ ) used in the first part of the equation above? Why ( = ) is not used?
Please give full explanation about ≡ and why it is used here and in which situations it is used.
Why the speed of sound in water is more than mercury, though the density of mercury is more than water?
A ball was kicked at an angle of 15 degree above the horizontal. The speed is 30 m/s at horizontal dimension (initial). Neglecting air resistance, the projectile will travel at what horizontal distance before striking the ground? Hint: Find first the time before its strikes the ground. Bonus: Get the time as it reaches its peak, the maximum height.
X-rays of wavelengths 1×10-10 are scattered from a carbon block to undergo a 90° Campton scattering.
a) calculate the Campton shift
b) what is the kinetic energy of the recoiling electron
what will be the value of acceleration due to gravity at a height of the radius of the earth , from the surface of the earth what will be the value of acceleration due to gravity at a height of the radius of the earth , from the surface of the earth
A rod 0.5 m long floats vertically in a liquid with 0.3 m above the surface. What is the density of the rod if the relative density of the liquid is 1.2?
The area of the body of a man is about 2.5 m². Find the force exerted on him by Earth's atmosphere when he is at an altitude of 50 m.
A standing wave on a 1.5 m rope has three nodes. What is the wavelength?
Two waves are traveling at the same speed in a medium. One of the waves has a frequency of 256 Hz and an amplitude of 5.0 m. The other wave has a frequency of 512 Hz and an amplitude of 2.5 m. Find the ratio of their intensities.
