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MA_775_DIABLO [31]
3 years ago
8

Light waves can be easily blocked but ______ waves pass through all substances? ( fill in the blank)

Physics
1 answer:
IRINA_888 [86]3 years ago
8 0
Compressional waves can travel through all states of matter.
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In which of the following cases is the torque about the shoulder due to the weight of the arm the greatest? Case 1: A person hol
Alexeev081 [22]

Answer: a) Case 2 b) Case 1

Explanation:

a) By definition, the magnitude of a torque, referred to a given point, is expressed as the product of the force that causes the torque, times the perpendicular distance to the reference point.

If we assume that the only force acting on the arm is the weight of the arm, and that this is concentrated in a point in the center of it (taking the arm as a solid bar with the center of mass at the mid-point), clearly the torque will be the greatest when the force be exactly perpendicular, which is the case of the arm placed straight out parallel to the ground (Case 2).

b)  As the torque and the angular acceleration are directly proportional each other (being the rotational inertia the proportionality constant) the angular acceleration will be maximum when torque be maximum also, which is the case that the arm begins to swim, due to the perpendicular distance to the shoulder is the maximum possible (Case 1).

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3 years ago
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n200080 [17]

Answer:

i think its secondary succession

Explanation:

because secondary succession happens when theirs an existing forest then its burnt down and a new ecosystem happens

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One eighth of a gram will remain
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3 years ago
I need help ASAP doing a test rn
Irina-Kira [14]

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Thinking also friction force

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7 0
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To play ice hockey, each player needs ________. skates rollerblades crosses sunglasses
ipn [44]

Answer:

skates

Explanation:

Ice hockey is considered to be an extremely tough sport in which there are twelve players who fights over small 3" puck which can be launched like a missile. If one plays ice hockey he should must have necessary equipment to support his sport. These equipment include Ice Skates,Helmet with Cage and Mouth-guard:, Hockey stick, Hockey pants,Hockey gloves, shoulder pads, elbow pads, Shin Guard:Neck guard and Jockstrap (men) or Pelvic protector (women).

<em>Here we can see that correct choice is ice skate which is important for supporting player's ankles while playing ice hockey.</em>

<em></em>

Hope it helps!

6 0
3 years ago
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