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4 years ago

2 QUESTIONS 20 POINTS

Physics

2 answers:

irina [24]4 years ago

7 0

I think 1 is x-rays and 2 is ultraviolet light.. I'm not that sure

stich3 [128]4 years ago

3 0

Just finished completitng this kind of info in the course that I am taking! X-rays contain the most energy, and microwaves would have the longest wavelength.

Higher frequency= more energy

If you want to add it to your notes, this is EMR listed in order from highest frequency/highest energy, to lowest frequency/ lowest energy.

Gamme rays, X-rays, UV, Visible light, Infrared, Microwave, and radio waves.

So, Gamme rays have the highest energy and frequency, and radio waves havethe lowest.

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A batter hits a 0.140-kg baseball that was approaching him at 19.5 m/s and, as a result, the ball leaves the bat at 44.8 m/s in

Arada [10]

Answer:

5295.3 N

Explanation:

According to law of momentum conservation, the change in momentum of the ball shall be from the momentum generated by the batter force

mv + P = mV

P = mV - mv = m(V - v)

Since the velocity of the ball before and after is in opposite direction, one of them is negative

P = 0.14(44.8 - (-19.5)) = 9 kg m/s

Hence the force exerted to generate such momentum within 1.7ms (0.0017s) is

F = P/t = 9/0.0017 = 5295.3 N

4 0

3 years ago

With detailed explaniation

belka [17]

Ø=37°
Initial velocity=u=20m/s
g=10m/s²

$\\ \rm\Rrightarrow H_{max}=\dfrac{u^2sin^2\theta}{2g}$

$\\ \rm\Rrightarrow H_{max}=\dfrac{20^2(sin37)^2}{2(10)}$

$\\ \rm\Rrightarrow H_{max}=\dfrac{400sin^237}{20}$

$\\ \rm\Rrightarrow H_{max}=20sin^237$

$\\ \rm\Rrightarrow H_{max}=7.2m$

$\\ \rm\Rrightarrow R=\dfrac{u^2sin2\theta}{g}$

$\\ \rm\Rrightarrow R=\dfrac{20^2sin74}{10}$

$\\ \rm\Rrightarrow R=40sin74$

$\\ \rm\Rrightarrow R=38.5m$

$\\ \rm\Rrightarrow T=\dfrac{2usin\theta}{g}$

$\\ \rm\Rrightarrow T=\dfrac{2(20)sin37}{10}$

$\\ \rm\Rrightarrow T=4sin37$

$\\ \rm\Rrightarrow T=2.4s$

Now

$\\ \rm\Rrightarrow v=u-gt$

$\\ \rm\Rrightarrow v=20-10(2.4)$

$\\ \rm\Rrightarrow v=20-24$

$\\ \rm\Rrightarrow v=-4m/s$

4 0

2 years ago

If a 50 W light bulb and a 90 W light bulb operate from 120 V, which bulb has a greater current in it?

PIT_PIT [208]

The 50 W bulb would have a greater current than the 90 W bulb

8 0

3 years ago

if a piece of sea floor has moved 50 km in 5 million years what is the yearly rate of sea-floor motion?

BartSMP [9]

<span>0.0001 km / year or 10^-5 km/year just take 50 km and divide it by 5 million</span>

6 0

3 years ago

Read 2 more answers

Describe The energy conversions that occur when coal is formed, and then burned to produce thermal energy.

svlad2 [7]

Answer:

When energy contained in coal is turned into heat, and then into electrical energy. As boiling water heated by the burning coal is cooled, steam forges from these cone-shaped cooling towers.

8 0

3 years ago