Answer: 2 hr 45 min
Explanation:
Given
The average speed between San Diego and Los Angeles is 
time taken for this trip is 
Distance between San Diego and Los Angeles is
For Friday afternoon, the average speed is 
time taken to complete the trip is
Heat always transfers from substances with high thermal energy to substances with low thermal until both substances reach the maximum temperature
Answer:
1)Eat healthy food
2)Exercise daily
3)Drink plenty of water
4)Get plenty of sleep
5)Do not take stress
6)Be hygienic
Explanation:
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Answer:
nitrogen
The atmosphere contains many gases, most in small amounts, including some pollutants and greenhouse gases. The most abundant gas in the atmosphere is nitrogen, with oxygen second. Argon, an inert gas, is the third most abundant gas in the atmosphere.
Explanation:
Answer:
a) 264.74 N
b) 91.15 N
c) 20.12°
Explanation:
Given:
Angle between the rope and the vertical, θ = 19°
Tension in the rope, T = 280 N
For the system to be in equilibrium,
The net force in vertical as well as in horizontal direction, should be zero
Therefore,
a) For Vertical direction
Weight of the child = vertical component of the tension
W = T cosθ ..............(1)
or
W = 280 cos19° = 264.74 N ............(a)
b) For horizontal
force on the child, F = T sinθ .............(2)
or
F = 280 sin19° = 91.15 N
c) Now, on dividing (1) and (2), we have
W/F = Tcosθ/Tsinθ
or
tanθ = F/W
now, for F = 97 N
tanθ = 97/264.74 = 0.3663 (W from (a))
or
θ = tan⁻¹(0.3663)
or
θ = 20.12°
