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liq [111]
3 years ago
8

Could someone please help me with this kinematics question?:

Physics
1 answer:
BaLLatris [955]3 years ago
7 0
So in your problem the following would be the answer where as the swimmer has a velocity of 1.6m/s arrives at 40m point and the river is 80m wide os the following is the answer:
a.39.85 m/s
b.0.8m/s
c.26.6 degrees upstreem
d.50
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An engineer is investigating energy loss through windows. The windowpane of interest is 0.650 cm thick, has dimensions of 1.19 m
krok68 [10]

Answer:

7908.92307 W

683330953.248 J

Explanation:

k = Heat conduction coefficient = 0.8 W/(m·°C)

A = Area = 1.19\times 2.25\ m^2

l = Thickness = 0.65 cm

T_2 = 24°C

T_1 = 0°C

Rate of heat transfer is given by

Q=\frac{kA(T_2-T_1)}{l}\\\Rightarrow Q=\frac{0.8\times 1.19\times 2.25(24-0)}{0.65\times 10^{-2}}\\\Rightarrow Q=7908.92307\ W

The rate of heat transfer is 7908.92307 W

Amount of energy is given by

E=Qt\\\Rightarrow E=7908.92307\times 24\times 3600\\\Rightarrow E=683330953.248\ J

The energy transferred through the window in one day is 683330953.248 J

8 0
3 years ago
What are the different characteristics that makes planet earth livable
Gnoma [55]

Answer:

oxygen, good atmosphere, water, food and good weather

Explanation:

oxygen:without it we won't live even the animals living under water needs oxygen

good atmosphere:it shields us from the sun radiation

water:for drinking

food:every living thing needs food

good weather:we won't mind freezing or dying of heat

6 0
4 years ago
Why do objects repel and attract?
Anarel [89]
Objects repel and attract because of a thing called electrostatic attraction. When objects have the same charge (positive or negative), then they will repel, and if they have opposite charges then they will attract
5 0
3 years ago
The largest acceleration is achieved by __
adell [148]

Answer:

B. a large change in velocity over a short time interval

Explanation:

A "chjange in velocity" is acceleration.  Acceleration is in units of meters/sec/sec or meter/sec^2.

)meters/sec) is velocity.  Sec is the time.

Velocity/Time:  A large change on the top (Velocity), divided by a small change in the bottom (sec) means the largest value for accceleration.

3 0
2 years ago
Two creatures sit on a horizontal frictional rotating platform. The platform rotates at a constant speed. The creatures do not s
ddd [48]

Answer:

M v^2 / R = centripetal force

For Red: M v^2 / R = 5 * 9^2 / 1.5 = 270

For Blue M v^2 / R = 270 = 25 * 1.8^2 / Rb

So Rb = 25 * 1.8^2 / 270 = .3 m

6 0
3 years ago
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