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sukhopar [10]
3 years ago
5

A positively charged glass rod attracts object X. The net charge of object X:A.may be zero or negative.B.may be zero or positive

.C.must be negative.D.must be positive.E.must be zero.
Physics
1 answer:
Damm [24]3 years ago
8 0

Answer:A

Explanation:

A positively charged glass rod attracts object x. So, object x must be negatively charged or uncharged.

This occurs because opposite charges attract each other or either object x is uncharged and a negative charge is induced in it as glass rod approach the object x.

So option A is correct

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With nonreturn to zero signaling, the voltage alternates between zero and a positive or negative voltage. True False
SSSSS [86.1K]

Answer:

False.

Explanation:

No. Voltage does not alternate between zero and positive or negative. In non return signaling (NRZ) voltage at zero represents the 0 bit and at the positive represent the 1 bit. NRZ is one of the signal levels of uni polar Scheme in which the signal does not return to zero at the middle of it. For example 10110. That is why it named as the non return signaling.

7 0
3 years ago
A basketball player jumps straight up with a speed of 14 m/s. How high did the player jump?
alexira [117]

Answer:

<em>The basketball player jumped 10 m high.</em>

Explanation:

<u>Vertical Launch Upwards </u>

In a vertical launch upwards, an object is launched vertically up without taking into consideration any kind of friction with the air.

If vo is the initial speed and g is the acceleration of gravity, the maximum height reached by the object is given by:

\displaystyle h_m=\frac{v_o^2}{2g}

The basketball player jumps up with a speed of vo=14 m/s. The maximum height is:

\displaystyle h_m=\frac{14^2}{2*9.8}

\displaystyle h_m=\frac{196}{19.6}=10

The basketball player jumped 10 m high.

7 0
3 years ago
Complete each statement about the sign of the work done on a baseball. Carlton catches a baseball and his hand moves backward as
dezoksy [38]

Answer and Explanation:

  • The work done is negative as the force is applied in the forward direction and the displacement of the hand is in the backward direction.
  • The work done is positive as the work is done on the baseball by Carlton. Moreover, both the force applied and the displacement of Carlton are in a straight line in the forward direction.
  • The work done in this case is zero as Carlton rides with constant speed, the Kinetic energy too remains constant and hence net work done is zero.
  • The work done in this case is positive as the work is done on the baseball by Carlton and as the velocity changes its Kinetic energy also varies wit it.
  • Also  the force applied and the displacement of Carlton in this case are in the directed to the same path.
8 0
3 years ago
Một nhà máy điện hơi nước nhận nhiệt từ một lò nung với tốc độ 280(gj/h) . Tổn thất nhiệt cho không khí xung quanh khi nó đi qua
weeeeeb [17]

what is languange?????

6 0
3 years ago
Has anyone done this???i need the last questions for 1 and 2
Helen [10]

Answer:

no i haven't done it

Explanation:

clean yo computer tho

8 0
3 years ago
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