Answer: D Demetrius who sees distortions and colors when he looks at a face.
Explanation:
Answer:
1.65 kg.m/s
Explanation:
mass of ball (m) = 0.13 kg
initial speed (u) = 18 m/s
acceleration due to gravity (g) = 9.81 m/s^{2}
angle of projection (p) = 90°
to find the momentum half way to its maximum height we first have to know the maximum height, and the velocity at the maximum height.
maximum height (h) =
maximum height (h) = = 16.53 m
velocity at half the maximum height (v) can be gotten from the equation of motion
( the negative sign is because the ball is moving upwards)
v =
v= 12.72 m/s
momentum of the ball half way to its maximum height = mass x velocity = 0.13 x 12.72 = 1.65 kg.m/s
From the geometry of the problem, the 20 m-long cable creates
the hypotenuse of a right triangle, with the extended of the other two sides of
size 20 m * cos(30 deg), which is around 17.3 m. Therefore, the ball has increased
by 20 m - 17.3 m = 2.7 m.
The potential energy will have altered by m*g*h, which is 1400 kg * 9.8 m/s^2 *
1.6 m , or about 37044 joules.
Answer: 313.24K
Explanation:
Given that:
Initial air pressure P1 = 210kPa
Initial Temperature T1 = 26°C
(Since, the SI unit of temperature is Kelvin, convert temperature in celsius to kelvin
26°C + 273 = 299K)
Final temperature T2 = ?
Final pressure P2 = 220kPa
Since, pressure and temperature are involved while volume is constant, apply the formula for pressure law
P1/T1 = P2/T2
210kPa/299K = 220kPa/T2
Cross multiply
210kPa x T2 = 220kPa x 299K
210 x T2 = 65780
T2 = (65780/210)
T2 = 313.24K
Thus, the temperature of the air in the tyre is 313.24K