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2 years ago

How are Earth and Venus similar? How is Venus different from Earth? (Provide two similarities and two differences.)

1 answer:

8 0

Venus shares a similar size, surface composition, and has an atmosphere with a complex weather system. Venus is different from Earth because it spins the opposite direction of Earth and it’s rotation is very slow.

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A particle moving in simple harmonic motion with a period T = 1.5 s passes through the equilibrium point at time t0 = 0 with a v

ch4aika [34]

Answer

given,

Time period= T = 1.5 s

If it's moving through equilibrium point at t₀= 0 with v = 1.0 m/s

v_max=1.00 m/s

we know,

v_ max=A ω

v = A sin (ωt)

-0.50= -1.00 sin (ωt)

sin (ωt) = 0.5

$\omega t = sin^{-1}(0.5)$

$\dfrac{2\pi}{T}\times t =0.524$

$\dfrac{2\pi}{1.5}\times t =0.524$

t = 0.125 s

we have time period T=1.5 it is the time to complete one oscillation

means from eq to right,then left,then eq,then left,then from right to eq

time taken for left = t/4 = 0.125/4 = 0.375 s

smallest value of time

=0.375 + 0.125

= 0.50 sec

7 0

2 years ago

An object falls 210 m in 6.3 s. What was it's initial velocity? Express your answer with the correct number of significant digit

KIM [24]

Answer:

$u = 2.5 \ m/s$

Explanation:

Given data:

Height, $h = 210 \ m$

Time, $t = 6.3 \ s$

Let the initial velocity of the object be <em>u</em>.

From the kinematic equation,

$h = ut + \frac{1}{2}gt^{2}$

$210 = u \times 6.3 + 0.5 \times 9.80 \times (6.3)^{2}$

$\Rightarrow \ u = 2.46 \ m/s$

$u = 2.5 \ m/s$ (rounding to tenth place)

8 0

3 years ago

Momentum = ___________.

posledela

The answer must be a mass x velocity

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2 years ago

A 60-kg box is being pushed a distance of 7.9 m across the floor by a force Upper POverscript right-arrow EndScripts ⁢ whose mag

il63 [147K]

Answer:

Explanation:

Given

mass of box=60 kg

distance=7.9 m

$\vec{P}=194 N$

Force is parallel to displacement

coefficient of kinetic energy $\mu =0.23$

Work done by Force

$W=P\cdot x=Px\cos \theta$

$W=Px\cos 0$

$W=194\times 7.9=1532.6 N$

Work done by Friction force

$W=f_r\cdot x$

$W=\mu Nx \cos 180$

$W=-0.23\times 60\times 9.8\times 7.9=-1068.396 J$

negative sign indicates that force is opposite to displacement

Work due to Weight and Normal reaction is zero as the force is perpendicular to Displacement

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2 years ago

I miss having friends

cricket20 [7]

It’s okay we can be friends :)

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2 years ago

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