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vladimir1956 [14]
2 years ago
9

is the rate at which ____________________ changes. (Velocity or Acceleration, velocity or acceleration)

Physics
1 answer:
Troyanec [42]2 years ago
8 0

<u>Acceleration</u> is the rate at which <u>velocity</u> changes.

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Which of the following characterizes a beta ray? Choose all that apply. is electromagnetic radiation is a product of natural rad
uranmaximum [27]

Explanation:

When a radioactive substance decays then the fast moving electrons emitted by it is known as beta ray. Basically, a number of beta particles are ejected by a beta ray.

Symbol of a beta particle is ^{0}_{-1}e. A beta ray is a natural decay of a radioactive element. As we know that opposite charges get attracted towards each other. So, a beta ray gets attracted towards a positively charged plate.

Therefore, we can conclude that following are the characterizes a beta ray:

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3 years ago
A wood block is sliding up a wood ramp. if the ramp is very steep, the block will reverse direction at its highest point and sli
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3 years ago
A weightlifter uses a force of 356 N to lift a set of weights 2.2 m off the ground. How much work did the weightlifter do? Answe
Valentin [98]

Answer:

783.2 N.m or Joules

Explanation:

W=F*d*cos(Ф)

Work done when a force F is applied to move an object by a displacement d meters

where cos(Ф) is the angle between applied force F and displacement d

Since the weightlifter is applying the force upward and the set of weight also move upward therefore, both are in same direction hence angle will be zero.

Now lets substitute the given values into the work equation:

W=356*2.2*cos(0)

since cos(0)=1

W=356*2.2*1

W=783.2 N.m

or

W=783.2 Joules

Since the unit of Force is Newton (N) and the unit of displacement is meters (m) therefore, unit of work done will be N.m

Note: 1 N.m is equivalent to 1 joule

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Answer:

Shape and position

Explanation:

Hope this helps! :)

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Freud believes that defense mechanisms are reactions people have to protect themselves from uncomfortable feelings. the article
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A: Anxious

Explanation:

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