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3 years ago

What type of energy is involved when a river moves sediment and erodes its banks?

1 answer:

8 0

First question: The type of energy involved when a river moves sediment and erodes its banks is: option d. Kinetic energy. Kinetic energy is the energy associated with motion. A body (in this case the water) that moves has an energy associated with its motion that is proportional to the speed (exactly to the square of the speed). When the water collides with the banks it is the kinetic energy of the river that erodes it Second question: the answer is the option d. As gravity pulls water down a slope potential energy changes to knietic energy. This is the, water loses altitude and gains velocity. The potential energy. which is proportional to the height, decreases and the kinetic energy, which is proportional to the square of the speed, increases.

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Find the self-inductance of a 1700-turn solenoid 55 cm long and 4.0 cm in diameter. Express your answer with the appropriate uni

Nitella [24]

The self-inductance of the solenoid is 8.25 mH.

The given parameters;

number of turns, N = 1700 turn
length of the solenoid, l = 55 cm = 0.55 m
diameter of solenoid, d = 4 cm
radius of the solenoid, r = 2 cm = 0.02 m

The area of the solenoid is calculated as follows;

$A = \pi r^2\\\\A = \pi \times (0.02)^2\\\\A = 0.00125 \ m^2$

The self-inductance of the solenoid is calculated as follows;

$L = \frac{\mu_o N^2 A }{l} \\\\L = \frac{(4\pi \times 10^{-7}) \times 1700^2 \times 0.00125}{0.55} \\\\L = 0.00825 \ H\\\\L = 8.25\ mH$

Thus, the self-inductance of the solenoid is 8.25 mH.

Learn more here:brainly.com/question/15612168

4 0

3 years ago

An unwary football player collides with a padded goalpost while running at a velocity of 7.50 m/s and comes to a full stop after

frez [133]

Answer:

(a) the deceleration of the player is -80.36 m/s²

(b) the time the collision last is 0.093 s

Explanation:

Given;

Initial velocity of the football player, u = 7.50 m/s

Final velocity of the football player, v = 0

distance traveled = compression of the pad, s = 0.35 m

Part (a) the deceleration of the player

v² = u² + 2as

0 = 7.5² + (2 x 0.35)a

0 = 56.25 + 0.7a

- 56.25 = 0.7a

a = -56.25 / 0.7

a = -80.36 m/s²

Part (b) the time the collision last

v = u + at

t = (v - u)/a

t = (0 - 7.5)/ -80.36

t = - 7.5 / -80.36

t = 0.093 s

7 0

3 years ago

A barge is carrying a load of gravel along a river.

sattari [20]

Answer:

Explanation:

Shoveling gravel into the water will increase the buoyancy of the barge, which will make it float higher. Without data it is hard to tell if it will raise the barge enough to be counterproductive, but in any case throwing away the payload is not a good idea. Adding some weights would make the barge float lower, and then maybe the plie can make it under the bridge.

7 0

3 years ago

A 5.0-Ω resistor and a 9.0-Ω resistor are connected in parallel. A 4.0-Ω resistor is then connected in series with this parallel

lbvjy [14]

The 4ohm resistor is not parallel to any devices, so the current through it is the same as the total current through the circuit.

Apply I = V/R
I = total current, V = battery voltage, R = total resistance

Calculate the total resistance R of the circuit first.

R will be the sum of the 4ohm resistor and the resistance of the 5&9ohm parallel resistors. To find the resistance of the pair, you apply the “sum of inverses” rule:

R = 1/(1/5 + 1/9) = 3.21ohm

Now add the 4ohm resistor:
R = 3.21 + 4 = 7.21ohm

Now let’s calculate I = V/R:
Given values:
V = 6.0V
R = 7.21ohm
Plug in and solve for I:
I = 6.0/7.21

I = 0.83A

8 0

4 years ago

What is the mass of erath

Wittaler [7]

the earth mass is clicked as a picture at up

6 0

4 years ago