4 years ago

What machine actually reduces the amount of force exerted because it acts over a greater distance?

Physics

2 answers:

Vikentia [17]4 years ago

8 0

bottle opener is the correct answer

vredina [299]4 years ago

3 0

The bottle opener does that. So do levers, pulleys, inclined planes, and some corkscrews.

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vladimir1956 [14]

That is nonsense, also known as jibberish

8 0

3 years ago

What distance will an object cover in 20 seconds if it is moving at 8 m/s

Nitella [24]

Answer:

160 m

Explanation:

distance covered in 1 s = 8 m

therefore, distance covered in 20 s = 8 * 20 m = 160 m

4 0

3 years ago

An aluminum wire with a diameter of 0.115 mm has a uniform electric field of 0.235 V/m imposed along its entire length. The temp

tekilochka [14]

Answer with Explanation:

We are given that

Diameter of coil=d=0.115mm

Radius, r= $\frac{d}{2}=\frac{0.115}{2}=0.0575mm=0.0575\times 10^{-3} m$

Using $1mm=10^{-3} m$

Electric field=E=0.235V/m

T=55 degree C

$T_0=20^{\circ} C$

$\rho_0=2.82\times 10^{-8}\Omega m$

$\alpha=3.9\times 10^{-3}/C$

(a).We know that

$\rho=\rho_0(1+\alpha(T-T_0))$

Substitute the values

$\rho=2.82\times 10^{-8}(1+3.9\times 10^{-3}(55-20))$

$\rho=3.2\times 10^{-8}\Omega m$

(b).Current density, $J=\frac{E}{\rho}$

Using the formula

$J=\frac{0.235}{3.2\times 10^{-8}}=7.3\times 10^6A/m^2$

c.Total current,I=JA

Where $A=\pi r^2$

$\pi=3.14$

Using the formula

$I=7.3\times 10^6\times 3.14\times (0.0575\times 10^{-3})^2$

I=0.076A

d.Length of wire=l=2m

$V=El$

Substitute the values

$V=0.235\times 2=0.47 V$

5 0

3 years ago

How are frequency and wave period Related?

exis [7]

The frequency and period of any wave are reciprocals.

Frequency = 1/period and Period = 1/frequency .

That means that the product of (frequency) times (period) of any wave is always the same. The product is always ' 1 ', with no unit.

7 0

3 years ago

Metal are what because light reflects off the electrons

givi [52]

The answer is A) Shiny

7 0

3 years ago

Read 2 more answers