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3 years ago

If the gradient of an Extension versus Force graph was found to be 5.6, then what is the value of the spring constant? *

Physics

1 answer:

worty [1.4K]3 years ago

5 0

Answer:

5.6

Explanation:

F=kx is the formula for spring force. If Extension versus Force was graphed, a linear relation would appear, where the slope is the k value, aka the spring constant.

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The voltage leaving the secondary coil of a transformer is equal to 240 V. The secondary coil is wrapped 8 times around the core

Lina20 [59]

The initial voltage at the primary= 750 V

Explanation:

for a transformer

Es/ Ep= Ns/ Np

Es= secondary voltage= 240 V

Ep= primary voltage

Ns= number of turns in the secondary=8

Np= Number of turns in the primary=25

so 240/Ep=8/25

Ep=750 V

7 0

3 years ago

Read 2 more answers

3. A 40.0-kg wagon is towed up a hill inclined at 18.5 with respect to the horizontal. The tow rope is parallel to the incline a

inn [45]

Force=tension-fg sin ∅
=140-mg sin 18.5
=140-124.35
=15.62N

a=f/m=15.62/40=0.39
now,
v²=u²+2as
=2×0.39×80
v²=62.4
v=7.8m/s

4 0

3 years ago

The pressure at the bottom of a jug filled with water does NOT depend on the

pickupchik [31]

Answer:

D) surface area of the water

Explanation:

The pressure at the bottom of a column of fluid is given by Stevino's law:

$p=\rho g h$

where

p is the pressure at the bottom of the column

$\rho$ is the density

g is the acceleration due to gravity

h is the depth of the liquid

So, we see that the pressure at the bottom of a jug filled with water depends on all these quantities:

A) depth of the liquid

B) acceleration due to gravity

C) density of water

While it does not depend on:

D) surface area of the water

5 0

3 years ago

A drop in pitch as a vehicle passes is known as the effect

Georgia [21]

The Doppler Effect...

<span>It describes an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other.</span>

4 0

3 years ago

Read 2 more answers

20 m

liubo4ka [24]

Answer:

1.9 km

Explanation:

The equation for vertical motion is ...

h(t) = -4.9t^2 +26t +20

This will have a zero near t = 5.988 seconds.*

The horizontal distance traveled in that time is ...

(310 m/s)(5.988 s) ≈ 1856 m ≈ 1.9 km

_____

* The root of a quadratic can be found numerous ways. We choose the quick and easy: let a graphing calculator show it to you.

5 0

4 years ago