What mixture is a blueberry muffin

A rock dropped on the moon will increase its speed from 0m/s to 8.15 m/s in 5 seconds what is the acceleration of the rock

sergejj [24]

speed Δv = v₂ = 8.15ms⁻¹

v₁ = 0ms⁻¹

time =t = 5s

acceleration = a = speed / time taken

a = Δv / Δt ( as Δv = v₂ - v₁)

a = 8.15ms⁻¹ / 5 s

a = 1.6ms⁻²

3 0

4 years ago

A rectangular dam is 101 ft long and 54 ft high. If the water is 35 ft deep, find the force of the water on the dam (the density

blsea [12.9K]

To solve this problem we will begin by finding the pressure through density and average depth. Later we will find the Force, by means of the relation of the pressure and the area.

$P = \rho h$

Here,

h = Depth average

$\rho$ = Density

Moreover,

$\text{Density of water}= \rho = 62.4lb/ft^3$

Replacing,

$P = (62.4lb/ft^3)(\frac{35}{2}ft)$

$P = 1092 lb/ft^2$

Finally the force

$\text{Force} = \text{Pressure}\times \text{Area of dam with water acting on it}$

$F = 1092lb/ft^2(101ft*52ft)$

$F = 5.735*10^6lbf$

6 0

3 years ago

Which has a greater buoyant force on it, a 25.0 cm3 piece of wood floating with part of its volume above water or a 25.0 cm3 pie

kozerog [31]

Answer:

piece of submerged iron

Explanation:

The buoyant force is given by:

$B=\rho_L V_{sub} g$

where

$\rho_L$ is the density of the liquid (in this case, water)

$V_{sub}$ is the submerged part of the object

g is the acceleration due to gravity

In this problem, the liquid used in the two examples is the same, water, so $\rho_L$ is the same; and g is the same as well. Therefore, the only difference between the two examples is $V_{sub}$ .

For the piece of wood, we are told that the object is floating, so only a fraction of its total volume of 25.0 cm3 will be submerged: therefore the submerged volume will be less than 25.0 cm3. On the contrary, the problem tells us that the piece of iron is submerged, so the submerged volume in this case is 25.0 cm3. Therefore, the submerged volume for the iron is greater than for the piece of wood, so the buoyant force of the piece of iron is greater.

8 0

3 years ago

Find the tension in the two ropes that are holding the 2.9 kg object in place. Rope 1 makes an angle of 51.3° with respect to th

Gnesinka [82]

Answer:

Explanation:

Let the tension in horizontal rope be T₁ and in the other rope be T₂ which is making angle of 51.3⁰

The vertical component of tension T₂ will balance the weight .

= T₂ cos 51.3 = 2.9 x 9.8

T₂ = 2.9 x 9.8 / cos 51.3

= 28.42 / .625

= 45.47 N

The horizontal component of T₂ will balance T₁

T₂ sin 51.3 = T₁

45.47 sin 51.3 = T₁

T₁ = 35.48 N .

8 0

3 years ago

What are the two ways that electrical current can travel while energizing devices and homes? Explain how the direction of travel

nexus9112 [7]

<span> In AC (alternating current) flow, like what comes out of your wall, the flow of electrons changes direction 60 times per second (50 times per second in Europe, China, etc). But in DC (direct current) flow, the average flow of electrons is in one direction only.
I hope it helped you</span>

5 0

3 years ago