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Y_Kistochka [10]
3 years ago
7

Please help I can’t get an answer

Physics
2 answers:
Anna007 [38]3 years ago
5 0
I am not 100% sure, more like 90% sure, that the answer is A. 

Hope this helps! :)
svp [43]3 years ago
3 0
C is the answer glad to help
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A steel wire of length 3.0cm is stretched through 2mm. If the cross-sectional
yarga [219]

Explanation:

rigidibiyu. jtibiti vekov oeo i irki jri kri oro lro

8 0
3 years ago
A rubber ball and a lump of clay have equal mass. They are thrown with equal speed against a wall. The ball bounces back with ne
gregori [183]

Answer:

The ball experiences the greater momentum change

Explanation:

The momentum change of each object is given by:

\Delta p = m \Delta v= m (v-u)

where

m is the mass of the object

v is the final velocity

u is the initial velocity

Both objects have same mass m and same initial velocity u. So we have:

- For the ball, the final velocity is

v=-u

Since it bounces back (so, opposite direction --> negative sign) with same speed (so, the magnitude of the final velocity is still u). So the change in momentum is

\Delta p=m(v-u)=m((-u)-u)=-2mu

- For the clay, the final velocity is

v=0

since it sticks to the wall. So, the change in momentum is

\Delta p = m(v-u)=m(0-u)=-mu

So we see that the greater momentum change (in magnitude) is experienced by the ball.

3 0
3 years ago
Find the power load P in kilowatts of an electrical circuit that takes a current I of 17 amperes at a voltage V of 320 volts if
MA_775_DIABLO [31]

Answer: P = 5.44 KW

Explanation:

The formula for calculating power is expressed as

P = VI

where

v is the voltage

I is the current

From the information given,

v = 320

I = 17

Thus,

P = 320 x 17 = 5440 W

We would convert it to KW by dividing by 1000. It becomes

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6 0
1 year ago
At what speed will a box be falling at a time t = 0.75 s after being dropped?
IRINA_888 [86]

Explanation:

Initial speed(u)= 0 m/s (Ball is dropped)

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Final speed(v)= u+at

v=0+(10)× 0.75

v=7.5 m/s

Speed is 7.5 m/s

8 0
3 years ago
What is an<br> example of a force?<br> Pressure<br> Power<br> Energy<br> Weight
Kryger [21]

Answer:

weight

Explanation:

weight is the pull of gravity so its a force !!

5 0
3 years ago
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