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4 years ago

The distance between two successive maximaof

Physics

1 answer:

denpristay [2]4 years ago

4 0

Answer:

v = 1.224 m/s

Explanation:

given,

distance between the two successive maxima = 1.70 m

number of crest = 8

time = 11 s

frequency is equal to number of cycle per secod

$f = \dfrac{8}{11}$

$f = 0.72\ Hz$

velocity of wave

v = f x λ

v = 0.72 x 1.70

v = 1.224 m/s

Hence, the wave speed is equal to v = 1.224 m/s

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A railroad tank car contains milk and rolls at a constant speed along a level track. The milk begins to leak out the bottom. The

kifflom [539]

Answer:

option C

Explanation:

The correct answer is option C

There is no external force acting in the system hence the momentum will be conserved.

As the milk is leaking out of the tank mass of the tanker is decreasing.

When the mass of the container will decrease to conservation the momentum speed of the container will have to be increased.

So, the car carrying milk will speed up.

8 0

3 years ago

Estimate the monthly cost of using a 700-W refrigerator that runs for 10 h a day if the cost per kWh is $0.20.

slamgirl [31]

Power consumed by the refrigerator is given as

$P = 700 W$

Now if refrigerator is used 10 h a day then total usage of refrigerator for 1 month will be given as

$t = 10 * 30 = 300 h$

now the total energy consumed in one month is given as

$E = P * t$

$E = 700 * 300$

$E = 210000$

$E = 210 kWh$

now it is given that cost of one kWh is $0.20

then total cost of one month is given as

$C = $0.20 * 210$

$C = $42$

7 0

3 years ago

A window has a glass surface of 2907 cm2 and a thickness of 5.6 mm. Find the rate of energy transfer by conduction through this

butalik [34]

Answer:

2.30714 W

-16.38071 W

Explanation:

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

A = Area = 2907 cm²

l = Thickness = 5.6 mm

$T_2$ = Outside temperature

$T_1$ = Inside temperature

Rate of heat transfer is given by

$Q=\frac{kA(T_2-T_1)}{l}\\\Rightarrow Q=\frac{0.8\times 2907\times 10^{-6}\times (81-71)\times \frac{5}{9}}{5.6\times 10^{-3}}\\\Rightarrow Q=2.30714\ W$

The rate of energy transfer is 2.30714 W

$Q=\frac{kA(T_2-T_1)}{l}\\\Rightarrow Q=\frac{0.8\times 2907\times 10^{-6}\times (0-71)\times \frac{5}{9}}{5.6\times 10^{-3}}\\\Rightarrow Q=-16.38071\ W$

The rate of energy transfer is -16.38071 W

7 0

3 years ago

Nancy is pushing her empty grocery cart at a rate of 1.8 m/s. 30 seconds later,

Strike441 [17]

3.Es tarde y mi taxi no llega. Estoy ____.
(5 Points)
preocupada
contenta

3 0

3 years ago

Please show work with the answer and thank you

Alika [10]

Answer:

its your homework

Explanation:

you aren't getting any free answers out of me because it sounds like your trying to be smart your welcome

(Not smarter than me)

7 0

3 years ago