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2 years ago

Mr Ndlovu works in centurion and works at Rosebank.It takes him 13minutes to get to work and he needs to be there at 08h15

Physics

1 answer:

VARVARA [1.3K]2 years ago

6 0

Answer:

8:02 no less

Explanation:

8:15 - 13mins = 8:02

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3x/y=6g/b solve for x

lora16 [44]

So looking at the problem, you are going to want to start by finding a common denominator (1) in this case: yb, and combining like terms (2). You are then going to want to multiply both sides by (yb) as the reciprocal to the fractions (3).
1) 3x 6g
---- = ---
y b

2) 3xb 6gy
------ = -----
yb yb

3) 3xb 6gy
(yb) ------ = -----
yb yb
which becomes: 3xb = 6gy

So after this, things become much more simple, as all you have to do is isolate the (x), which can be done by dividing the entire equation by (3b).

3xb 6gy
----- = -----
3b 3b

where you will then find your answer of:
2gy
x = ----- (simplified by the GCM of 3)
b

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2 years ago

Question 1: Bicycle pump

belka [17]

Answer: The pressure of the air when compressed is $5.0\times 10^5Pa$

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

$P\propto \frac{1}{V}$ (At constant temperature and number of moles)

$P_1V_1=P_2V_2$

where,

$P_1$ = initial pressure of gas = $1.0\times 10^5Pa$

$P_2$ = final pressure of gas =?

$V_1$ = initial volume of gas = V

$V_2$ = final volume of gas = $\frac{V}{5}$

$1.0\times 10^5\times V=P_2\times \frac{V}{5}$

$P_2=5.0\times 10^5Pa$

Therefore, the pressure of the air when compressed is $5.0\times 10^5Pa$

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2 years ago

This chart shows characteristics of three different waves, all with the same wavelength of 10 m but moving at different Which st

JulijaS [17]

Answer:

Wave X is moving the fastest.

Explanation:

As we know that the speed of the wave is given as the product of frequency and wavelength

so here we will have

$\lambda = 10 m$

now for wave X

$f = 6 Hz$

now the speed of this wave is

$v_x = 10 \times 6 = 60 m/s$

now for wave Y

$f = 0.5 Hz$

now the speed of this wave is

$v_y = 10 \times 0.5 = 5 m/s$

now for wave Z

$f = 2 Hz$

now the speed of this wave is

$v_z = 10 \times 2 = 20 m/s$

So correct answer will be

Wave X is moving the fastest.

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Answer:

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