Answer:
7. (D) uniformly accelerated vertical motion
8. (A) zero
9. (A) zero
10. (C) parabolic
Force = (mass) x (acceleration)
Mass = 2000 grams = 2 kilograms
Force = (2 kg) x (8.3 m/s²)
Force = <em>16.6 Newtons</em>
Answer:
The salinity will decrese beacause of the salinity being desolved by more water
Explanation:
the ice will melt makeing there be more water and the salt will desolove
The amount of energy needed to raise the temperature of 250 g of water from 20 to 100 degree Celsius is
Q = 250 (4.18) (100 - 20)
Q = 83600 J
The power delivered is
P = 83600 / (4(60))
P = 348.33 W
According to the data for a Nichrome wire, the wire gauge for power rating of 348.33 W and 120 V power supply is
23-27 AWG
Refer to the diagram shown below.
Still-water speed = 9.5 m/s
River speed = 3.75 m/s down stream.
The velocity of the swimmer relative to the bank is the vector sum of his still-water speed and the speed of the river.
The velocity relative to the bank is
V = √(9.5² + 3.75²) = 10.21 m/s
The downstream angle is
θ = tan⁻¹ 3.75/9.5 = 21.5°
Answer: 10.2 m/s at 21.5° downstream.