Answer:
A system that includes the stone and the earth.
Explanation:
If the system of being dropped from the height of the cliff consists of just the stone alone, then it means that its momentum will certainly undergo changes as it falls freely. However, If the system is now expanded to include not only the stone but also the Earth, then it implies that the momentum of the stone which is in the downward direction will be equal and opposite to the momentum of the Earth in the upwards direction towards the stone. Therefore, the momentum will cancel out and net momentum will be zero.
I think its remote sensing. Hope this helps :)
Answer:
∆E = 4.16J
Change in internal energy of the tie and spike is 4.16J
Explanation:
Given;
Mass of spike m = 0.77kg
Initial Speed of spike v = 3.5m/s
Efficiency = 88.3%
Kinetic energy of spike can be calculated as;
K.E = 1/2 × mv^2
Substituting the values;
K.E = 1/2 × 0.77 × 3.5^2
K.E = 4.71625J
Change in internal energy of the tie and spike;
∆E = 88.3% of K.E
∆E = 0.883 × 4.71625J
∆E = 4.16J
Change in internal energy of the tie and spike is 4.16J
Explanation :
(1) The path of motion of a thrown javelin is an example of projectile motion. It is a type of motion that is experienced by an object that is thrown near the earth's surface. The object then moves along a curved path under the influence of gravity.
(2) Force is the product of mass and velocity i.e. F = ma
So,
Hence, the acceleration of an object is equal to net<em> force</em> acting on the object dividing by the objects<em> mass.</em>
(3) The pressure exerted by a fluid at any given depth is exerted <em>uniformly </em>in all directions.
(4) Mass of canoe, m = 38 Kg
velocity of canoe, v = 2.2 m\s
momentum is given by, p = mv
So, momentum of canoe is 83.6 Kgm/s
(5) Acceleration is given by the rate of change of velocity per unit time. If is final velocity and is initial velocity,
Then change in velocity will be
since,
So,
The figure (examples ) of the question is attached below.
Answer: The answer is prism.
Explanation:
When a ray of white light passes through the prism it separates into many colors or different wavelength of light is seen.
This phenomenon is known as diffraction .In the visible wavelengths of the electromagnetic spectrum, red, is diffracted most and violet is diffracted lowest due to shortest wavelength.
It appears like a rainbow of 7 colors because it is white light that diffracts into 7 colors after passing a prism.