3 years ago

Describes at least three everyday things that exist or occur because of science

Physics

1 answer:

klasskru [66]3 years ago

4 0

1. Being on your phone.
2. Drink juice, soda, tea, etc.
3. Cook.

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Work out the kinetic energy of a 2.5 kg remote-controlled car that is moving at 2 m/s.

lbvjy [14]

Answer: 5 joules

Explanation:

mass=m=2.5kg

Velocity=v=2m/s

Kinetic energy=ke

ke=(m x v x v)/2

ke=(2.5 x 2 x 2)/2

Ke=10/2

Ke=5

Kinetic energy=5 joules

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3 years ago

Suppose you are investigating how the day ends hamsters affect how much they run on the hamster wheel. In order to control the e

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a standing wave in a pipe with both ends open has a frequency of 348. hz. the next higher harmonic has a frequency of 522. hz.

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Answer:

A pipe open at both ends would have an antinode at each end and its length would be λ/ 2

The next such points would be λ and 3 λ / 2

The ratio of 522 / 348 is 1.5 so the harmonic at 348 is one wavelength and the next harmonic is 3 λ / 2 at 1 1/2 wavelengths

348 hz would occur at one wavelength

f λ = v = f L where the length of the pipe is one wavelength

if we use 331 as the speed of sound then

L = 331 / 348 = .95 m for the length of the pipe

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2 years ago

A person walks into a room that has, on opposite walls, two plane mirrors producing multiple images. Find the distances from the

Lapatulllka [165]

Answer:13.2,41.4,82.8 ft

Explanation:

Given Person is 6.60 ft from the left hand side mirror

Since the focal length of plane mirror is infinity therefore image and object are equidistant from mirror

Distance of first image on left mirror is

$d_1=6.6+6.6=13.2 ft$

i.e. image is 13.2 ft away from object

Second image

Now the right mirror forms the image of object at distance of 14.1 ft right from right mirror so its image is formed in left mirror at a distance of 34.8 from left mirror

so image distance from person is

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Third image now form image of second image is formed on right mirror at a distance of 55.5 right from right mirror

and its mirror image is formed on left mirror at a distance of 76.2 left

from left mirror

$d_3=76.2+6.6=82.8 ft$

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3 years ago

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The dog used a greater force then me

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