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3 years ago

11

What time will the new moon rise

1 answer:

andrew-mc [135]3 years ago

6 0

Answer:

Around 12 AM :)

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What action force is used when sitting down

Genrish500 [490]

When sitting down there is gravity , when sat down the chair is pushing back at a equal but opposite force

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4 years ago

The turntable in a microwave oven has a moment of inertia of 0.039 kg⋅m2 and is rotating once every 4.4 s . Part A What is its k

gayaneshka [121]

To solve this problem it is necessary to apply the concepts related to Kinetic Energy, specifically, since it is a body with angular movement, the kinetic rotational energy. Recall that kinetic energy is defined as the work necessary to accelerate a body of a given mass from rest to the indicated speed.

Mathematically it can be expressed as,

$KE = \frac{1}{2} I\omega^2$

Where

I = Moment of Inertia

$\omega =$ Angular velocity

Our values are given as

$I = 0.039kg\cdot m^2$

A revolution is made every 4.4 seconds.

$\theta = 1 rev \rightarrow 4.4s$

$\Rightarrow \omega = \frac{1rev}{4.4s}$

If the angular velocity is equivalent to the displacement over the time it takes to perform it then

$\omega = 0.2272rev/s(\frac{2\pi rad}{1rev})$

$\omega = 1.42rad/s$

Replacing at our previous equation we have,

$KE = \frac{1}{2} I\omega^2$

$KE = \frac{1}{2} (0.039)(1.42)^2$

$KE = 0.03993J$

Therefore the kinetic energy is equal to $3.9*10^{-2}J$

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3 years ago

Do atoms have mass ?

MArishka [77]

There are not enough electrons in atoms to affect the total mass, so the total mass is just the weight of the protons and neutrons.

4 0

3 years ago

The gold-like mineral in the metamorphic rock pictured below is known as pyrite. When pyrite is exposed to air and water it can

andreyandreev [35.5K]

Answer: C. Chemical Weathering

Explanation:

3 0

3 years ago

Read 2 more answers

A train is travelling at 50 m s−1 when the driver applies the brakes and gives the train a constant deceleration of magnitude 0.

ryzh [129]

Answer:

The strain will come to rest after traveling some distance.

distance traveled = 2500 m

Explanation:

The strain will come to rest after traveling some distance.

Applying,

s = ut+at²/2................... Equation 1

Given: u = initial velocity, a = deceleration, t = time, s = distance

From the question,

Given: u = 50 m/s, t = 100s, a = -0.5 m/s²(deceleration)

Substitute these values into equation 1

s = 50(100)+(-0.5)(100²)/2

s = 5000-2500

s = 2500 m

Hence the distance traveled is 2500 m

3 0

3 years ago