Answer:
PEgrav = m *• g • h
Explanation:
In the above equation, m represents the mass of the object, h represents the height of the object and g represents the gravitational field strength (9.8 N/kg on Earth) - sometimes referred to as the acceleration of gravity.
Hope this helps
In the question it is already given that the football player is 80 kg.
Then the mass of the football player = 80 kg
Velocity at which the football player is running = 8 m/s
<span>Kinetic Energy = 0.5 • mass • square of velocity
Now we have to put the known data in this equation to find the actual velocity of the footballer.
</span> <span></span>So
Kinetic Energy of the footballer = 0.5 * 80 * (8 * 8)
= 0.5 * 80 * 64
= 2560
So the Kinetic energy of the footballer is 2560 joules
When an object gets heated by a temperature ΔT energy needed, E = mcΔT
Here mass of glass = 55 g = ![55*10^{-3}kg](https://tex.z-dn.net/?f=55%2A10%5E%7B-3%7Dkg)
Change in temperature ΔT = 16^0C[/tex] = 16 K
Specific heat of glass = 0.84 J/gK = 840 J/kgK
Substituting we will get
E =
*840*16 = 739.2 J
So a heat of 739.2 J is required to raise the temperature of a 55 g glass ball by 16°C
Answer:
1.8 m/s
Explanation:
= Mass of Max = 15 kg
= Mass of Maya = 12 kg
= Initial velocity of Max = 8.2 m/s
= Initial velocity of Maya = -4.6 m/s
= Final velocity of Max
= Final velocity of Maya = 3.4 m/s
In this system the linear momentum is conserved
![m_1u_1+m_2u_2=m_1v_1+m_2v_2\\\Rightarrow v_1=\dfrac{m_1u_1+m_2u_2-m_2v_2}{m_1}\\\Rightarrow v_1=\dfrac{15\times 8.2+12\times -4.6-12\times 3.4}{15}\\\Rightarrow v_1=1.8\ m/s](https://tex.z-dn.net/?f=m_1u_1%2Bm_2u_2%3Dm_1v_1%2Bm_2v_2%5C%5C%5CRightarrow%20v_1%3D%5Cdfrac%7Bm_1u_1%2Bm_2u_2-m_2v_2%7D%7Bm_1%7D%5C%5C%5CRightarrow%20v_1%3D%5Cdfrac%7B15%5Ctimes%208.2%2B12%5Ctimes%20-4.6-12%5Ctimes%203.4%7D%7B15%7D%5C%5C%5CRightarrow%20v_1%3D1.8%5C%20m%2Fs)
The velocity of Max after their collision is 1.8 m/s
First you have to note down you horoscope for 2-3 days.
Daily observe what is written in your horoscope is true or not. You can observe your entire day movements.
Now you have to conclude whether your horoscope was true or not and you have to write an essay explaining what had happened to you in past observation and conclude whether you believe in astronomy or not depending on your observations