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3 years ago

Two samples of water are mixed together.

Physics

1 answer:

horrorfan [7]3 years ago

6 0

Let the cold water go up x degrees.

Let the hot water go down 100 - x degrees.

The formula for heat exchange is m*c*delta t

Givens

Ice

deltat = x

m = 0.50 kg

c = 4.18

Hot water

deltat = 100 - x

m = 1.5 kg

c = 4.18

Formula

The heat up = heat down

0.50 * c * x = 1.5 * c * (100 - x) Divide both sides by c

Solution

0.50 *x = 1.5*(100 - x) Remove the brackets.

0.5x = 150 - 1.5x Add 1.5x to both sides.

0.5x + 1.5x = 150 - 1.5x + 1.5x Combine like terms

2x = 150 Divide by 2

x = 75

Answer

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5 0

2 years ago

A pair of in-phase stereo speakers is placed side by side, 0.764 m apart. You stand directly in front of one of the speakers, 2.

Goryan [66]

Answer:

f = 2858.33 Hz

Explanation:

given,

distance between speaker (A) and the person = 2.34 m

Distance between speaker (B) and the person is AB =

= $\sqrt{(0.764)^2 + (2.34)^2}$

= 2.46 m

path difference d = BP - AP

= 2.46 - 2.34 m

= 0.12 m

now, λ = 0.12

speed of sound = 343 m/s

$f= \dfrac{c}{\lambda}$

$f= \dfrac{343}{0.12}$

f = 2858.33 Hz

the lowest frequency that will produce constructive interference is equal to

f = 2858.33 Hz

7 0

2 years ago

Help show how you got answers

lapo4ka [179]

The speed at which a wave of frequency of 14 Hz and a wavelength of 3 m will travel is 42 m / s

v = λ / T

f = 1 / T

v = f λ

v = Wave speed

λ = Wavelength

T = Time period

f = Frequency

f = 14 Hz

λ = 3 m

v = 14 * 3

v = 42 m / s

Frequency is the number of time an event occurs repeatedly in an unit amount of time. Its unit is hertz which in terms of SI unit is $s^{-1}$ .

Therefore, the speed at which the wave will travel is 42 m / s

To know more about frequency

brainly.com/question/16861358

#SPJ1

4 0

1 year ago

Which two subatomic particles have approximately the same mass

maksim [4K]

Answer:

proton and neutron has the same mass of 1amu

5 0

3 years ago

Single Stage 0.0/3.0 points (graded) Consider a rocket carrying 100,000 kg of propellant, 10,000 kg of structure, and 5000 kg of

Nonamiya [84]

Answer: The Propellant fraction is 0.87.

The payload fraction is 0.04.

Δv = 8991.81 m/s

Explanation: To determine the fractions, first, calculate the total mass of the rocket:

$m_{t} = m_{prop} + m_{str} + m_{pay}$

$m_{t} = 100,000 + 10,000 + 5,000$

$m_{t} = 115,000$

The Propellant Fraction will be

$m_{prop} = \frac{m_{prop}}{m_{t}}$

$m_{prop} = \frac{100,000}{115,000}$

$m_{prop} =$ 0.87

The Payload Fraction is:

$m_{pay} = \frac{m_{pay}}{m_{t}}$

$m_{pay} = \frac{5,000}{115,000}$

$m_{pay} =$ 0.04

The value of Δv is calculated by the formula:

Δv = $-V_{e}. ln(\frac{m_{final}}{m_{initial}} )$

The exhaust velocity ( $V_{e}$ ) is:

$V_{e} = g_{0}.Isp$

$V_{e} =$ 9.81*450

$V_{e} =$ 4414.5

$m_{final}$ is the total mass after the rocket consume all the propellant and $m_{initial}$ is the total mass before the action.

Δv = $-V_{e}. ln(\frac{m_{final}}{m_{initial}} )$

Δv = $-4414.5.ln(\frac{15,000}{115,000} )$

Δv = - 4414.5.ln(0.13)

Δv = 8991.81

Δv will be 8991.81 m/s.

7 0

3 years ago