3 years ago

Because it needs sunlight to proceed, what type of reaction is photosynthesis?

Physics

2 answers:

ololo11 [35]3 years ago

6 0

C) Endothermic...... Hope it helps :)

skelet666 [1.2K]3 years ago

6 0

In my opinion the answer would be C. Endothermic

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A truck enters a typical runaway lane with a speed of 57.5 mph ( 25.7 m/s ). Use the work-energy theorem to find the minimum coe

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Answer:

Work done by friction force= change in total Energy

so,

W= (friction force)*d= (mu*N)*(35)

so,

mu*m*g*35= 1/2*m*v^2

so,

mu= 0.5*(25.7)^2/(9.81*35)

solving it,

mu = 0.9618

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3 years ago

Maya uses a tuning fork of frequency 250 Hz to produce transverese waves on a stretched string. Her friend justin measure the di

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Answer:

The velocity of the wave is 12.5 m/s

Explanation:

The given parameters are;

he frequency of the tuning fork, f = 250 Hz

The distance between successive crests of the wave formed, λ = 5 cm = 0.05 m

The velocity of a wave, v = f × λ

Where;

f = The frequency of the wave

λ = The wavelength of the wave - The distance between crests =

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v = 250 Hz × 0.05 m = 12.5 m/s

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3 years ago

For which of the following is the velocity constant (speed/direction does not change)?

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A cat ignoring the dog by sitting perfectly still

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3 years ago

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3 years ago

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A 1 170.0 kg car traveling initially with a speed of 25.000 m/s in an easterly direction crashes into the back of a 9 800.0 kg t

Stella [2.4K]

Answer:

Explanation:

mass of car, m1 = 1170 kg

mass of truck, m2 = 9800 kg

initial velocity of car, u1 = 25 m/s

initial velocity of truck, u2 = 20 m/s

final velocity of car, v1 = 18 m/s

Let the final velocity of truck is v2.

(a) Use the conservation of momentum

m1 x u1 + m2 x u2 + m1 x v1 + m2 x v2

1170 x 25 + 9800 x 20 = 1170 x 18 + 9800 x v2

29250 + 196000 = 21060 + 9800 v2

v2 = 20.84 m/s

(b) Total kinetic energy before collision,

Ki = 0.5 x 1170 x 25 x 25 + 0.5 x 9800 x 20 x 20

Ki = 365625 + 1960000 = 2325625 J

Total final kinetic energy

Kf = 0.5 x 1170 x 18 x 18 + 0.5 x 9800 x 20.84 x 20.84

Kf = 189540 + 2128097.44

Kf = 2317637.44 J

Change in energy = 2325625 - 2317637.44 = 7987.56 J

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4 years ago