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4 years ago

Which substance—wood or steel—is the better conductor? A conductor is a material that requires very little

1 answer:

7 0

Steel is the correct answer because steel when on being applied heat will either change its state that too after hours because of its melting point being high or remain in that position only whereas wood turns into ashes...that is why we use metal utensils in the kitchen

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The range of human hearing is roughly from twenty hertz to twentykilohertz. Based on these limits and a value of 305 m/s for the

AnnyKZ [126]

Answer:

1. $L_s=0.0076\ m$

2. $L_l=7.62\ m$

Explanation:

Given that

f₁= 20 Hz

f₂= 20 KHz

C= 305 m/s

For open pie organ :

$L=\dfrac{C}{2f}$

Shortest length :

$L_s=\dfrac{C}{2f_2}$

$L_s=\dfrac{305}{2\times 20000}$

$L_s=0.0076\ m$

Longest length : 

$L_l=\dfrac{C}{2f_1}$

$L_l=\dfrac{305}{2\times 20}$

$L_l=7.62\ m$

7 0

3 years ago

A gas is placed in a 5.0-mL syringe. It exerts 127 mm Hg of pressure on the inside walls of the syringe. The syringe's plunger i

Gekata [30.6K]

Answer:264.58 mm of Hg

Explanation:

Given

Volume of gas $V_1=5\ mL$

Pressure $P_1=127\ \text{mm of Hg}$

If the Plunger is pressed volume is reduced to

$V_2=2.4\ mL$

As temperature of the gas does not change so it follows boyle's law

According to which

$P_1V_1=P_2V_2$

$127\times 5=P_2\times 2.4$

$P_2=264.58\ \text{mm of Hg}$

8 0

3 years ago

Why are the marked lines on a beaker like this useful for measuring the volume of a liquid?

kaheart [24]

Could it be the first one

6 0

3 years ago

What does f=G(m1m2)/R2 help us find

amm1812

Answer: Gravitational force

Explanation:

The law of universal gravitation states that the force of attraction (F) between two bodies is directly proportional to their masses m1 and m2, and inversely proportional to the square of the distance (R) seperating them.

Thus, it is expressed mathematically as:

F = Gm1m2/R²

where,

- G is the gravitational constant with a value of 6.7 x 10^-11 Nm2/kg2

- F is the Gravitational force (unit is Newton)

- m1 and m2 are the masses of the two bodies (unit is kilograms)

- R is the distance seperating the two bodies. (unit is metres)

Thus, the formula f=G(m1m2)/R² help us find the gravitational force.

4 0

3 years ago

A ball is thrown downward with an initial velocity of 3.8 m/s. What is its acceleration?

hammer [34]

I think it’s 0 m/s because usually what I remember is when velocity is moving the acceleration is constant

6 0

3 years ago

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