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bekas [8.4K]
3 years ago
5

ccording to the law of inertia, if you see an object in motion slowing down, what can you conclude? a. That there must be some e

xternal influence acting on it that makes it slow down. b. Nothing; any object in motion left to itself will eventually slow down to a stop.
Physics
1 answer:
ivanzaharov [21]3 years ago
7 0

Answer:

a)

Explanation:

Newton's First law (aka law of inertia) says that any object, not subject to an external influence, must be keep in its present motion status (at rest or moving at constant speed along a straight line) forever.

So, if we see an object in motion slowing down, there must be an external infuence acting on it, that makes it slow down, like a friction force, for instance.

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an electrically charged particle with mass m, velocity v, and charge q moves in a circle in magnetic field b. what is the formul
kolbaska11 [484]

Answer:

r=\frac {mv}{qb}

Explanation:

In this case,  since the charged particle moves in circular motion,  the centripetal force is equivalent to the magnetic force.

\frac {mv^{2}}{r}=qvb\\\frac {mv}{r}=qb\\r=\frac {mv}{qb}

5 0
3 years ago
Tungsten, W-181, is a radioactive isotope with a half life of 121 days. If a medical lab purchases 24 kg of W-181, how much will
lorasvet [3.4K]
D) 3 kg
One year is approximately 3 half lives of W-181. The amount remaining would be 1/23 or 1/8. That is 3 kg of W-181.
4 0
3 years ago
Read 2 more answers
B) A skilled jet fighter flies a stunt plane in a vertical circle of 1200 ft
adell [148]

The jet fighter's acceleration at the highest point is 17.56 ft/s²

The jet fighter's acceleration at the lowest point is 35.12 ft/s²

The given parameters;

radius of the circular path, r = 1200 ft

constant velocity, v = 140 mi/h = 205.3 ft/s

The formula for centripetal acceleration in a circular path is given as;

a_c = \frac{v^2}{r}

The jet fighter's acceleration at the highest point is calculated as;

h = 2r = 2 x 1200 ft = 2,400 ft

a_c = \frac{v^2}{r} \\\\a_c = \frac{(205.3)^2}{2400} \\\\a_c = 17.56 \ ft/s^2

The jet fighter's acceleration at the lowest point is calculated as;

h = r = 1,200 ft

a_c = \frac{v^2}{r} \\\\a_c = \frac{(205.3)^2}{1200} \\\\a_c = 35.12\ ft/s^2

Learn more here:brainly.com/question/11700262

6 0
3 years ago
Modern Soccer can be traced back to 1863, when football (futbol) and rugby split ways and futbol (soccer) rule would no longer a
alexandr402 [8]

<u>Answer:</u>

<u>True</u>

Explanation:

It is agreed that the laws of Modern Soccer can be traced back to 1863 when new rules stated that players would no longer use their hands in football (futbol) except the goalie (its another term for the goalkeeper).

These rules were created by The Football Association (FA), the governing body of association football in the areas around England, and was formed in 1863.

3 0
4 years ago
James (mass 95.0 kg ) and Ramon (mass 67.0 kg ) are 20.0 m apart on a frozen pond. Midway between them is a mug of their favorit
SOVA2 [1]

Answer:

The speed of James is 0.776 m/s

Explanation:

Step 1: Data given

mass of James = 95.0 kg

mass of Ramon = 67.0 kg

We consider James and Ramon and the rope to a single system. This means that the net external forces on the system = 0

.The momentum = 0, so the sum of the momentum of each part must be 0 in total.

Step 2: Calculate the speed of James

m(james) *v(James) = m(Ramon) * v(Ramon)

with m(James) = the mass of James = 95.0 kg

with v(James) = speed of James = TO BE DETERMINED

with m(Ramon) = mass of Ramon = 67.0 kg

with v(Ramon) = speed of Ramon = 1.10 m/s

v(James) =  (m(Ramon) * v(Ramon))/ m(james)

v(James) = (67.0 kg* 1.10 m/s) / 95.0 kg

v(James) = 0.776 m/s

The speed of James is 0.776 m/s

8 0
4 years ago
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