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hammer [34]
3 years ago
12

The density of iron is 7.87 g/cm3. If an iron cannonball has a volume of 105 cm3

Physics
1 answer:
Reptile [31]3 years ago
6 0

the answer is 0.284 lb/in3

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Two harmonic sound waves reach an overseveer simulatenouslt. the obsever hears the sound intensity rise and fall with a time of
irakobra [83]

Answer:

dF=2.5Hz

Explanation:

From the question we are told that:

Time T=0.2sec

Generally the Period is given as

 T= 2 * 0.2 = 0.4

Therefore difference in frequency dF

 dF=\frac{1}{T}

 dF=\frac{1}{0.4}

 dF=2.5Hz

4 0
3 years ago
A projectile is launched at ground level with an initial speed of 50.0 m/s at an angle of 30.0° above the horizontal. it strike
Anni [7]
<span>x = 129.9 m y = 30.9 m First, let's calculate the horizontal and vertical velocities involved h = 50.0cos(30) = 43.30127 m/s v = 50.0sin(30) = 25 m/s The horizontal distance is simply the horizontal velocity multiplied by the time, so 43.30127 m/s * 3 s = 129.9 m So the horizontal distance traveled is 129.9 m, so x = 129.9 m The vertical distance needs to take into account gravity which provides an acceleration of -9.8 m/s^2, so we get d = 25 m/s * 3s - 0.5*9.8 m/s^2 * (3 s)^2 d = 75 m - 4.9 m/s^2 * 9 s^2 d = 75 m - 44.1 m d = 30.9 m So the vertical distance traveled is 30.9 m, so y = 30.9 m</span>
8 0
3 years ago
You need eye drops for your dry eyes. You brought only a few dollars with you to the store. Which is the best method of choosing
Mnenie [13.5K]

Answer:

Compare brands first, but purchase the one that has lots of commercial advertisements, Compare ingredients and purchase the brand that is safe to use with soft contact lenses, Compare prices and purchase the most inexpensive brand.

Explanation:

4 0
3 years ago
Which term describes the ability to process many things simultaneously?
stellarik [79]

Answer:

Parallel processing

Explanation:

It is a parallel processing because it involves the brain processing many part of problem simultaneously.

The brain natural mode of information involves performing many task .

It is also ability of the brain to simultaneously process incoming stimuli or signals of different quality. It is a part of brain's vision and divide what is seen into four major parts which are color, motion, shape, and depth.

4 0
3 years ago
Read 2 more answers
A tungsten wire has resistance R at 20°C. A second tungsten wire at 20°C has twice the length and half the cross-sectional area
Bad White [126]
The resistance is 4 times the resistance of the first wire. the formula is R = p*l/A with p being resistivity, l length and A area. So if you double length and half area, which botv result in more resistance, you get p*2/0.5 or 4 (p can be abandoned because it is the same. We take standard length and area as 1)
6 0
3 years ago
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