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cupoosta [38]
3 years ago
9

HElP ME PLEASE I AM DESPERATE!!!!!!

Physics
2 answers:
Zigmanuir [339]3 years ago
3 0
It’s the first choice reflection
balandron [24]3 years ago
3 0

Answer:

I think its refraction im not sure

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A body of mass 400 kg is suspended at a lower end of a light vertical chain and is being pulled up vertically. Initially the bod
yKpoI14uk [10]

Answer:31.62 m/s

Explanation:

Given

mass of body m=400 kg

Pull on chain is F_1=6000g N=60 kN

Pull get smaller at the rate of F_2=360g N/m

Net Upward Force F=6000 g-360 g\times 10=24 kN

net acceleration a=\frac{F}{m}

a=\frac{24\times 1000}{m}

a=\frac{24000}{400}

a=60 m/s^2

but g is acting downward

a_{net}=a-g=60-10=50 m/s^2

using v^2-u^2=2 as

here initial velocity is zero

v^2=2\times 50\times 10

v=31.62 m/s

7 0
4 years ago
A student hangs a balloon from a string then rubs it on their hair and releases it. They rub a second balloon on their hair then
REY [17]

Answer:

c

Explanation:

tha two ballon have acquired similar charges they therefore repel each other

5 0
3 years ago
Why do spring tides happen twice a month
umka2103 [35]
<span>Spring tides occur twice a month because the Sun and Moon are on same side of Earth and also when both are opposite side of of Earth.</span>
5 0
4 years ago
Read 2 more answers
the batter swings the bat and makes contact with the ball. when this occurs, the kinetic energy of the bat is transferred to the
Ghella [55]
It will possibly be A) chemical b/c it can make a sound like when the bar hits the ball it makes a sound correct?! and also it created heat especially when it hits the ball. and when the ball MOVES and the bar HITS it creates kinetic energy, but when you hit the ball it doesn’t create a new substance.
7 0
3 years ago
Read 2 more answers
A mass attached to a spring oscillates with a period of 22 sec. After 22 kg are​ added, the period becomes 33 sec. Assuming that
polet [3.4K]

Answer:

Mass of 17.854 kg is only attached to the spring    

Explanation:

We have given time period in first case is 22 sec

Let initially mass is m

After 22 kg are added the period becomes 33 sec

Time period of spring mass system is

T=2\pi \sqrt{\frac{m}{k}}, here m is mass and k is spring constant

From the relation we can see that

\frac{T_1}{T_2}=\sqrt{\frac{m}{m+22}}

\frac{22}{33}=\sqrt{\frac{m}{m+22}}

Squaring both side

0.444={\frac{m}{m+22}}

0.444m+9.777=m

m = 17.584 kg

So mass of 17.854 kg is only attached to the spring

7 0
3 years ago
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