3 years ago

I need to know how to do it and what the answer is

Physics

1 answer:

ozzi3 years ago

7 0

I think there might be less pollution

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The pedals on a bicycle give a mechanical advantage by allowing you to turn the pedals a __________ distance to turn the _______

denpristay [2]

Short distance to turn the circumference of the wheels. Mechanical advantage is load/effort I think

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3 years ago

Read 2 more answers

The equation y = 5 Sin (3x - 4t), where

igomit [66]

Answer:

Frequency, f = 0.63 Hz

Period, T = 1.58 s

Speed of a wave, v = 1.34 m/s

Explanation:

The equation of a wave is given by :

$y = 5 \sin (3x - 4t)$ ...(1)

y is in mm

x is in meters

t is in seconds

The general equation of a wave is given by :

$y=A\sin(kx-\omega t)$ ...(2)

(i) Compare equation (1) and (2) we get :

$k=3\\\\\omega=4$

Since,

$\omega=2\pi f\\\\f=\dfrac{\omega}{2\pi}\\\\f=\dfrac{4}{2\pi}\\\\f=0.63\ Hz$

(ii) Period of wave is :

$T=\dfrac{1}{f}\\\\T=\dfrac{1}{0.63}\\\\T=1.58\ s$

(iii) Speed of a wave,

$v=\dfrac{\omega}{k}\\\\v=\dfrac{4}{3}\\\\v=1.34\ m/s$

4 0

3 years ago

How long would it take for a penny to fall from the top of the empire state building? the building is 381 meters tall.

NISA [10]

Here, S = ut + 1/2 at²
381 = 0*t + 1/2 * 9.8 * t²
762/9.8 = t²
t = √77.75
t = 8.82 sec

In short, Your Answer would be 8.82 s

Hope this helps!

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3 years ago

Write the nuclear equation for the alpha decay of astatine-213.

Sonbull [250]

Answer:

hope this helpes!!

Explanation:

plz mark brainliest

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3 years ago

When an astronaut with a mass of 55 Kg goes from Earth to the Moon, how much does their weight change? Answer in N OR in Pounds.

Katen [24]

PHYSICS

mass = 55 kg

gravitation earth = 9,8 m/s²

gravitation moon = 1,62 m/s²

Weight Change = ______?

Answer :

1) Earth

$w = m \times g$

w = 55 × 9,8

w = 539 N

2) Moon

$w \: = m \times g$

w = 55 × 1,62

w = 89.1 N

4 0

3 years ago