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3 years ago

A car is travelling around a circular track at a steady speed. A force causes it to follow the track.

1 answer:

4 0

The force that keeps the car moving in a circle is perpendicular to the car's velocity. The force points toward the center of the circle. The angle is 90°.

The diagram that illustrates my answer is attached hereunto.

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A laser pulse takes 2.56 seconds to travel from Earth to the Moon and return. Use this to calculate how far away the Moon is. Ho

Deffense [45]

Answer:

$x = 3.84\times 10^{5}\,km$

This delay affect conversations in the sense that recipient will be receive the message just 2.56 seconds after the message was sent.

Explanation:

The laser pulse has an ondulatory nature as electromagnetic wave, which can travel in the void. Speed of light is constant and distance between Earth and the Moon is:

$x = 0.5\cdot c\cdot \Delta t$

$x = 0.5\cdot (3\times 10^{5}\,\frac{km}{s})\cdot (2.56\,s)$

$x = 3.84\times 10^{5}\,km$

This delay affect conversations in the sense that recipient will be receive the message just 2.56 seconds after the message was sent.

7 0

3 years ago

Where on the periodic table would this element most likely be found? Group 1 Group 2 Group 12 Group 13

andrezito [222]

Answer:

The right approach will be Option C "Group 12".

Explanation:

A table that further arranges the chemical components in addition to expanding the electron configuration. Elements possessing identical characteristics are positioned in almost the same section (column or group), although elements in almost the same row become positioned with a similar amount of electron spheres.
Group 12 components therefore partially replaced (n − 1)d subshells, and therefore aren't metals, technically accurate. However, although much their chemistry seems to be comparable to something like the components throughout the d block which includes establishing themselves.

Some other options in question are not relevant to something like the given scenario. Because then the option here is just the right one.

6 0

4 years ago

Two small space probes have been slowed to 10m/s as they approach the moon from the same direction. Probe 1 has a mass of 86kg a

bulgar [2K]

Answer:

Explanation:

4 0

3 years ago

Auto companies frequently test the safety of automobiles by putting themthrough crash tests to observe the integrity of the pass

e-lub [12.9K]

Answer:

The average force that brings the car to rest is 175000N

Explanation:

The mass of the car, m = 1000 kg

Initial speed, u = 14 m/s

Final speed, v = 0 m/s (Since the car comes to a stop)

The time taken, t = 8 x 10^-2 s

The average force is calculated as:

$\begin{gathered} F=\frac{m(u-v)}{t} \\ F=\frac{1000(14-0)}{8\times10^{-2}} \\ F=\frac{14000}{0.08} \\ F=175000N \end{gathered}$

The average force that brings the car to rest is 175000N

4 0

1 year ago

What are the units for specific charge? A. C/kg B. C*kg C. kg/C D. 1/C*kg

Stolb23 [73]

Answer:

Option A

Explanation:

Your answer is the first option or "C/kg." C/kg is a ratio for specific charge. C for the charge of the electron, kg for the mass of the electron. To find the specific charge we divide the two, which usually involves scientific notations and simplifying.

Example:
$\frac{C}{kg}$
$\frac{3.4\times10^3C}{2.7\times10^5kg}$

Hope this helps.

6 0

2 years ago