How much work is done if I use 5N of force to move an object 2 meters

What two factors could the students change to investigate how to increase and decrease the magnetic force between the paperclip

scoundrel [369]

..............................................A

4 0

3 years ago

A 6cm diameter horizontal pipe gradually narrows to 4cm.

Rom4ik [11]

Answer: $Q=0.5612 m^3/s$

Explanation:

Given

diameter of pipe( $d_1$ )=6 cm

diameter of pipe( $d_2$ )=4 cm

$P_1=32 kPa$

$P_2=24 kPa$

$A_1=\frac{\pi }{4}6^2=9\pi cm^2$

$A_2=\frac{\pi }{4}4^2=4\pi cm^2$

$v_1=\frac{Q}{A_1}$

Applying bernoulli's equation

$\frac{P_1}{\rho g}+\frac{v^2_1}{2g}+z_1=\frac{P_2}{\rho g}+\frac{v^2_2}{2g}+z_2$

$\frac{P_1}{\rho g}+\frac{\frac{Q^2}{A_1^2}}{2g}+z_1=\frac{P_2}{\rho g}+\frac{\frac{Q^2}{A_2^2}}{2g}+z_2$

since $z_1=z_2$

$\frac{32\times 10^3}{10^3\times 9.81}+\frac{Q^2}{2A_1^2g}=\frac{24\times 10^3}{10^3\times 9.81}+\frac{Q^2}{2A_2^2g}$

$Q^2=\frac{8\times 2\times 81\pi ^2\times 16\pi ^2\times 10^{-4}}{65\pi ^2}$

$Q^2=3149.3722\times 10^{-4}$

$Q=\sqrt{3149.3722\times 10^{-4}}$

$Q=0.5612 m^3/s$

4 0

3 years ago

3. If a certain quantity of gas has a volume of 30 cm3 at a pressure of 1 × 105 Pa, what is its volume when the pressure is

arlik [135]

We know that:

$P_{1}V_{1}= P_{2}V_{2}$ .......(1)

Given at $P_{1}=30cm^3$ , $V_{1}=10^5Pa$

a)

When $P_{2}=2*10^5Pa$ , $V_2=$ ?

Using equation (1)

$30*10^5=2*10^5*V_2$

$V_2=30/2=15cm^3$

b)

When $P_2=5*10^5Pa$ , $V_2=?$

using equation (1)

$30*10^5=5*10^5*V_2$

$V_2=30/5=6cm^3$

5 0

3 years ago

How does the size of a wind turbine affect its energy output?

melisa1 [442]

Answer:

Larger tubines generate more electricity.

Explanation:

Larger blades allow the turbine to capture more of the kinetic energy of the wind by moving more air through the rotors. However, larger blades require more space and higher wind speeds to operate. This distance is necessary to avoid interference between turbines, which decreases the power output.

6 0

3 years ago

What are the differences between convex lens and convex mirrors ?

MaRussiya [10]

Answer:

The mirror is opaque while the lens is transparent

Explanation:

The lens is transparent throughout (lets light pass through), while the mirror reflects light. You are basically asking for the difference between a lens and a mirror

But how about the the behaviors of the convex mirror and convex lens? The convex lens will let light pass through and focus it on the other side of it. If you stand on one side of the lens, you can see what is on the other side of it. Think about a camera lens that's just curved!The convex mirror will reflect the light on the same side of it you'll basically will just see yourself but you'll look funny.

4 0

3 years ago