3 years ago

UVA and UVB rays can cause skin damage and skin cancer. True False

2 answers:

6 0

UVB rays have slightly more energy than UVA rays. They can damage the DNA in skin cells directly, and are the main rays that cause sunburns. They are also thought to cause most skin cancers.

stiv31 [10]3 years ago

3 0

Answer:

true

Explanation:

they can cause skin damage

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A Net Force Of 60 N Accelerates A 4-kg Mass Over A Distance Of 10 M.

storchak [24]

Net Force = 600 N
Kinetic Energy = 600 J
(Work done) >> KE since there is no mention of frictional forces

5 0

3 years ago

Question 2

Nostrana [21]

Answer:

in pretty sure the last one

8 0

4 years ago

an oscilloscope has a time/div setting of 50ms and there are 10 divisions on the time scale. a sine wave on the oscilloscope dis

mamaluj [8]

Answer:

The frequency is f = 6Hz

Explanation:

Given

The time division setting is $d_t =50ms = 50*10^{-3}s$

The number of division is $n= 10$

The total time for 10 division can be mathematically obtained as

$T_{total} = 10 *50*10^{-3}$

$=500 *10^{-3}s$

From the question the time for 3 cycle is

$T_{total} = 500*10^{-3}s$

Then the for one cycle which equivalent to the Period $(T)$ $= \frac{T_{total}}{3}$

$= \frac{500 *10^{-3}}{3}$

The frequency is generally given as $f = \frac{1}{period} = \frac{1}{T}$

Now substituting values we have

$f = \frac{3}{500 *10^{-3}}$

$= 6Hz$

4 0

4 years ago

An object's natural frequency depends partially on the material from which it is made.

laiz [17]

Yes. Partly. Also on the size and shape of the object, and also on what material it's IN at the time ... like air, water, Helium, Jello, etc.

3 0

3 years ago

Read 2 more answers

8. A man takes one minute to lift 4 bags of sugar each of weight 50N

timofeeve [1]

Answer:

Explanation:

the formula is F=mgh

so now you can write it like

m= 4×50=200

200×1.5×10=30000

6 0

3 years ago