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Arada [10]
3 years ago
8

The mass of an object is 18g and its volume is 9 cm3

Physics
1 answer:
serg [7]3 years ago
5 0
Density = 2 g/cm ^3 (if that’s the question)
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What has to happen for a feather and ball to fall at the same time
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This means that two objects will reach the ground at the same time if they are dropped simultaneously from the same height. ... When air resistance plays a role, the shape of the object becomes important. In air, a feather and a ball do not fall at the same rate.
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Which of the following statements about Boyle's law are correct? The temperature and pressure must remain constant for the law t
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Answer: The temperature and the number of molecules must reamain constant for the law to apply, and as the pressure increases, the volumen decreases proportionally.

Boyle's law states that if the temperature, T, of a given mass of gas, remains constant, the Volume, V, of the gas is in inverse relation to the pressure, p; i.e.

pV = constant (for a given mass of gas, at constant T)

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3 years ago
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____ are low energy waves found in the electromagnetic spectrum and ____ are high energy waves found in the electromagnetic spec
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according to the question are microwaves and X-rays

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4 years ago
Marvin uses a long copper wire with resistivity 1.68 x 10^-8 Ω⋅m and diameter 1.00 x 10^−3​​ m to create a solenoid that has a 3
Mazyrski [523]

Answer with Explanation:

We are given that

Resistivity of copper wire=\rh0=1.68\times 10^{-8}\Omega m

Diameter=d=1.00\times 10^{-3} m

Radius of copper wire=r=\frac{d}{2}=\frac{1}{2}\times 10^{-3} m

Radius of solenoid=r'=3 cm=3\times 10^{-2} m

1 m=100 cm

a.Length of wire=l=11.3 m

Area of wire=A=\pi r^2

Where \pi=3.14

A=3.14\times (\frac{1}{2}\times 10^{-3})^2

Resistance, R=\rho \frac{l}{A}

Using the formula

R=1.68\times 10^{-8}\times\frac{11.3}{3.14\times (\frac{1}{2}\times 10^{-3})^2}

R=0.24\Omega

B.Length of solenoid=2\pi r'=2\times 3.14\times 3\times 10^{-2}=0.188 m

Number of turns=n_0=\frac{l}{2\pi r'}=\frac{11.3}{0.188}

n_0=60

C.Potential difference,V=3 V

Current,I=\frac{V}{R}

I=\frac{3}{0.24}=12.5 A

D.Total length =0.1 m

Number of turns per unit length,n=\frac{60}{0.1}=600

Magnetic field along central axis inside of the solenoid,B=\mu_0 nI

B=4\pi\times 10^{-7}\times 12.5\times 600=9.42\times 10^{-3} T

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Answer:

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Explanation:

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