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3 years ago

10

(i) What is the acceleration of an object between 0-4 seconds?

1 answer:

DENIUS [597]3 years ago

4 0

Answer:

Your small tiny face

Explanation:

HIHIHIIHHI

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A plece of titanium has a mass of 67.5g and a volume of 15cm<br> What is the density?

sveta [45]

Answer:

4.5g/cm^3

Explanation:

Here, Mass(m)=67.5g

Volume(v)=15cm^3

Now, According to formula,

Density(p)=m/v

=67.5/15

=4.5g/cm^3

8 0

3 years ago

Two loudspeakers are 1.60 m apart. A person stands 3.00 m from one speaker and 3.50 m from the other. (a) What is the lowest fre

VMariaS [17]

Answer:

Explanation:

Given

Distance between two loud speakers $d=1.6\ m$

Distance of person from one speaker $x_1=3\ m$

Distance of person from second speaker $x_2=3.5\ m$

Path difference between the waves is given by

$x_2-x_1=(2m+1)\cdot \frac{\lambda }{2}$

for destructive interference m=0 I.e.

$x_2-x_1=\frac{\lambda }{2}$

$3.5-3=\frac{\lambda }{2}$

$\lambda =0.5\times 2$

$\lambda =1\ m$

frequency is given by

$f=\frac{v}{\lambda }$

where $v=velocity\ of\ sound\ (v=343\ m/s)$

$f=\frac{343}{1}=343\ Hz$

For next frequency which will cause destructive interference is

i.e. $m=1$ and $m=2$

$3.5-3=\frac{2\cdot 1+1}{2}\cdot \lambda$

$\lambda =\frac{1}{3}\ m$

frequency corresponding to this is

$f_2=\frac{343}{\frac{1}{3}}=1029\ Hz$

for $m=2$

$3.5-3=\frac{5}{2}\cdot \lambda$

$\lambda =\frac{1}{5}\ m$

Frequency corresponding to this wavelength

$f_3=\frac{343}{\frac{1}{5}}$

$f_3=1715\ Hz$

8 0

4 years ago

A closed system:

adoni [48]

The answer is b i just did the test

3 0

2 years ago

Explain how the thermal energy of a swimming pool compares to the thermal energy of a lake at the same temperature.

astra-53 [7]

There is more thermal energy in the lake because there is more water which is more thermal energy

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3 years ago

WILL GET BRAINLIEST!!

Ket [755]

It’s definitely the 3rd one

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3 years ago

Read 2 more answers