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4 years ago

Compare and contrast sodium and fluorine? Compare and contrast oxygen and hydrogen?

1 answer:

6 0

sodium is found in group one element, but flourine members of halogens . oxygen found in group six element ,but hydrogen found in group 1( according to periodic table)

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Find the components to write this vector in unit vector notation: 63.5 A please help

IrinaVladis [17]

Vector is perpendicular to x axis or i component.

Hence i component is 0

j component is 63.5

$\\ \sf\longmapsto \overrightharpoon{A}=0\hat{i} +63.5\hat{j}$

6 0

3 years ago

The triceps muscle in the back of the upper arm is primarily used to extend the forearm. Suppose this muscle in a professional b

bagirrra123 [75]

To solve this problem it is necessary to address the concepts related to Torque as a function of the force and distance where it is applied and the moment of inertia from which the torque, moment of inertia and angular acceleration are related.

By definition the torque is defined as

$\tau = F*r$

Where,

$\tau = Torque$

F = Force

r = Radius

For our values we have:

$\tau = F*r$

$\tau = (1.75*10^3)(2.8*10^{-2})$

$\tau = 49Nm$

Consequently the calculation of the moment of inertia would then be given by the relationship

$\tau = I\alpha$

$I=\frac{\tau}{\alpha}$

Replacing with our values

$I = \frac{49}{150}$

$I = 0.322Kg.m^2$

The moment of inertia of the boxer's forearm $0.322Kg.m^2$

4 0

3 years ago

Which of the following would most likely happen if water did not form hydrogen bonds?

Trava [24]

Option C is the correct answer

6 0

4 years ago

Sort the sentences based on whether they describe radio waves, visible light waves, or both.

valentina_108 [34]

The electromagnetic spectrum includes a continuous spectrum of wavelengths that include:

Radio waves, microwaves, infrared light, visible, ultraviolet, X-rays, gamma rays

The wavelength decreases from radio waves to gamma rays, whereas the energy increases along the same direction.

In the given example, radio waves have a lower energy and higher wavelength than visible light. The latter can be perceived by the human eye, whereas radio waves are not visible to the human eye.

1) They have colors = visible light

2) They can travel in a vacuum = both

3) They have energy = both

4) They’re used to learn about dust and gas clouds = radio waves

5) They’re used to find the temperature of stars = visible light

6)They’re invisible = radio waves

6 0

4 years ago

An electric scooter has a battery capable of supplying 135 Wh of energy. If friction forces and other losses account for 60.0% o

Vedmedyk [2.9K]

Answer:

206 m

Explanation:

The energy output of the scooter battery = 135 Wh = 135 W × 3600 s = 486000 J.

If 60.0% accounts for losses, then

useful energy = (100 - 60)% of 486000 J = 40% × 486000 J = 194400 J

The energy needed to move through an altitude = product of weight and altitude

$E=F\times h$

$h = \dfrac{E}{F} = \dfrac{194400\text{ J}}{945\text{ N}} = 206\text{ m}$

7 0

3 years ago