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3 years ago

Which atoms have the lowest electronegativity?

Physics

2 answers:

Kobotan [32]3 years ago

8 0

Answer:

the element Francium

Explanation:

AlexFokin [52]3 years ago

7 0

Francium(sorry if I'm wrong)

Explanation:

which has an electronegativity of 0.7

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Jack and Jill are maneuvering a 3100 kg boat near a dock. Initially the boat's position is < 2, 0, 3 > m and its speed is

liraira [26]

Answer:

(a) work done by Jack is -2200J

(b) work done by Jill is 0

Explanation:

Given;

Initially boat's position = < 2, 0, 3 > m

Final boat's position = < 6, 0, 1 > m

change in position = < 4, 0, -2 >

Force exerted by Jack = < -440, 0, 220 > N

Force exerted by Jill = < 170, 0, 340 > N

Part (a) How much work does Jack do?

work done = force x distance

Jack's work = < -440, 0, 220 > N x < 4, 0, -2 > m

= [(-440*4) + (0*0) + (220*-2)]

= -1760 J - 440 J

= -2200J

Part (b) How much work does Jill do?

Jill's work = < 170, 0, 340 > N x < 4, 0, -2> m

= [(170*4) + (0*0) + (340*-2)]

= 680 J - 680 J

= 0

7 0

4 years ago

You need to design a banked curve at the new circular Super 100 Raceway. The radius of the track is 800 m and cars typically tra

uysha [10]

Answer:

$33.1^{\circ}$

Explanation:

Let's start by writing the equations of the forces along the two directions:

- Vertical:

$N cos \theta = mg$

where

N is the normal reaction

$\theta$ is the angle between the road and the horizontal

(mg) is the weight of the car, with m being its mass and g the acceleration of gravity

- Horizontal:

$N sin\theta = m \frac{v^2}{r}$

where

v is the speed of the car

r is the radius of the turn

Dividing the 2nd equation by the 1st one, we get:

$tan \theta = \frac{v^2}{rg}$

In this problem:

$r = 800 m$ (radius of the turn)

$v=160 mi/h = 71.5 m/s$ is the speed

$g=9.8 m/s^2$

Substituting, we find:

$\theta= tan^{-1} (\frac{v^2}{rg})=tan^{-1}(\frac{(71.5)^2}{(800)(9.8)})=33.1^{\circ}$

8 0

4 years ago

If you dropped a ball off a building, how far would it fall in 3 seconds?

tangare [24]

If you drop a ball off a building it increases its speed by 10 m/s so in 3 seconds it’s speed would be 30 m/s and it’s distance would be 45m

4 0

3 years ago

What is the water table?

Setler [38]

The subsurface zone in which all openings of the rock are filled with water is called the zone of saturation.

8 0

4 years ago

Read the question below.

Oxana [17]

Answer:

Experimental

Explanation:

Here the dependency of pressure on the temperature is to be determined. For finding this factor we need to calculate the pressure of the object at different temperature.

The process of calculating pressure for different temperature is experimental investigation because we need to perform this experiment for finding these value. On the basis of observed values the we can conclude the dependency.

Thus, this investigation is experimental.

8 0

3 years ago

Read 2 more answers