3 years ago

Any wanna talk to me

Physics

1 answer:

Sliva [168]3 years ago

6 0

Answer:hello

Explanation:

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Everything in the world has the same density. True or False?

JulijaS [17]

False
Nothing has the same destiny everything has their own destiny to follow

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3 years ago

Humpback whales are known to produce a collection of elaborate and repeating sounds with frequencies starting at 20 Hz. The soun

jasenka [17]

Answer:

70 m.

Explanation:

Given,

Frequency, f = 20 HZ

speed of sound, v = 1400 m/s

wavelength of the waves = ?

we know,

v = f λ

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

$\lambda= \dfrac{1400}{20}$

$\lambda=70\ m$

Hence, the wavelength of the wave is equal to 70 m.

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4 years ago

The area of a piston of a force pump is 8 X 10⁴m². What force must be

prisoha [69]

Answer:

Force of $37.44 * 10^{8}$ Kgm/s^2 must be applied to the piston to raise oil to a height of 6.0 m

Explanation:

As we know,

Pressure is the force per unit area

Or $P = \frac{F}{A}$

Force $= P * A$

Pressure is the product of density, gravitational constant and height

$P = 780 * 10 * 6$

Force

$= P * A\\= 780 * 10*6*8*10^4\\= 37.44 * 10^{8}$ Kgm/s^2

5 0

3 years ago

A 17 kg box experiences an applied force of +175 N and a force of friction of -125 N. While experiencing these unbalanced forces

Flura [38]

Answer: (b)

Explanation:

Given

Mass of box $m=17\ kg$

Applied force $F=175\ N$

Friction force $f=-125\ N$

Box travels a distance of $s=15\ m$

time taken $t=5.25\ s$

Net unbalanced force $F_{net}=175-125=50\ N$

Work done by the unbalanced force

$\Rightarrow W=F_{un}\cdot s\\\Rightarrow W=50\times 15\\\Rightarrow W=750\ N$

Power developed by unbalanced force

$\Rightarrow P=\dfrac{W}{t}\\\\\Rightarrow P=\dfrac{750}{5.25}\\\\\Rightarrow P=142.85\approx 1423\ W$

Thus, option (b) is correct.

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3 years ago

Which of the following can occur when an object is accelerating?

Vlada [557]

Answer:

Explanation:

Change in speed or direction is acceleration

4 0

3 years ago