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3 years ago

A positron undergoes a displacement ∆r= 2i -3j+6k, ending with the position vector r= 3j-4k, in meters. what was the positron's

initial position

Physics

1 answer:

Margaret [11]3 years ago

3 0

$\Delta{r}=2i-3j+6k \\r_f = 3j-4k \\\Delta{r}=r_f-r_0\Longrightarrow2i-3j+6k=3j-4k-r_0 \\r_0=2i-3j+6k+3j-4k=\boxed{2i+6j+10k}$

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3 years ago

A 55-kg woman is wearing high heels.

Grace [21]

Answer:

Pressure, $P=1.90\times 10^7\ Pa$

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3 years ago

When vehicle wheels are about to lock, the ABS senses the impending lock up and prevents this from occurring. a) True b) False 2

Anna35 [415]

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Note that it often helps to hinder wheels from locking up and helping the driver to be able to steer to safety.

When vehicle wheels are about to lock, the ABS senses the impending lock up and prevents this from occurring is true as that is its function.

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2 years ago

According to the first law of thermodynamics, the amount of work done by a heat engine equals the amount of

AleksandrR [38]

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3 years ago

Read 2 more answers

Nerve impulses in a human body travel at a speed of about 100 m/s. Suppose a man accidentally stubs his toe. About how much time

alexandr1967 [171]

Answer:

t = 0.018 s

Explanation:

given,

nerve impulse in human body travel at a speed of = 100 m/s

height of the man = 1.80 m

time taken by the impulse to travel from foot to brain = ?

distance = speed × time

1.80 = 100 × t

t = $\dfrac{1.80}{100}$

t = 0.018 s

hence, the time taken by the nerve to reach brain from toe is 0.018 s

5 0

3 years ago