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3 years ago

a runner covers the last straigjt stretch of a race in 4 s. during that time, he speeds up from 5m/s to 9m/s.

1 answer:

8 0

During that final period of time,
his acceleration is
(9 m/s - 5 m/s) / (4 sec) = 1 m/s² .

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2 years ago

In a transformer a 120 volt dc Primary of 500 turns is connected to a secondary of 75 turns. What is the Induced voltage in the

oee [108]

Answer:

The induced voltage in the Secondary is 18 volt.

Explanation:

Given that,

Voltage = 120 volt

Number of turns in primary = 500

Number of turns in secondary = 75

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Using relation number of turns and voltage in primary and secondary

$\dfrac{V_{p}}{V_{s}}=\dfrac{N_{p}}{N_{s}}$

Where, $N_{p}$ = Number of primary coil

$N_{s}$ = Number of secondary coil

$V_{p}$ = Voltage of primary coil

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3 years ago

physics Test 2 In a double slit experiment, if the separation between the two slits is 0.050 mm and the distance from the slits

Ipatiy [6.2K]

Answer:0.015 m

Explanation:

Given

distance between two slits(d)=0.050 mm

Distance between slit and screen=2.5 m

Wavelength $(\lambda )=600 nm$

and distance between First order and second order $=\frac{D\lambda }{2d}$

$=\frac{2.5\times 600\times 10^{-9}}{2\times 5\times 10^{-5}}$

$=15\times 10^{-3}$

=0.015 m

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3 years ago