3 years ago

Which of the following is equal to 1W?A.1 JB.1 J/sC.1 J·sD.1 N·m

Physics

1 answer:

Ray Of Light [21]3 years ago

7 0

B. Extra text to get to 20 characters.

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Find the length of a pendulum that oscillates with a frequency of 0.16 hz. the acceleration due to gravity is 9.81 m/s 2 . answe

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The period of the pendulum is the reciprocal of the frequency:
$T= \frac{1}{f}= \frac{1}{0.16 Hz}=6.25 s$

The period of the pendulum is given by
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3 years ago

The volumes of a sample of lead and a sample of platinum are the same: 2 cm3. The density of lead is 11.3 g/cm3 and the density

Vlad1618 [11]

The answer is C. The mass of the platinum sample is greater than the mass of the lead sample. As I explained in a previous answer, if they are the same volume, but one is heavier, then it must be more dense. In this particular example, the platinum is more dense than the lead, and therefore has more mass.

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4 years ago

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Two fishing boats depart a harbor at the same time, one traveling east, the other south. the eastbound boat travels at a speed 1

Novosadov [1.4K]

they are travelling at right angles to each other.
At any given instant they form a right triangle with their starting point
South bound = x [mi/h]
 East bound = x+1 [mi/h]
after five hours they will be
d=5x
and
d=5(x+1)
miles away from the starting point
(5x)^2+(5(x+1))^2=625
25x^2+(5x+5)^2=625
25x^2+25x^2+50x+25=625
50x^2+50x-600=0
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(x+4)(x-3)=0
take the postive value
x= 3 mph the speed of south bound
4mph east bound

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3 years ago