Can an object be in motion and not in motion at the same time? Explain.

The quantity of charge passing through a surface of area 1.82 cm2 varies with time as q = q1 t 3 + q2 t + q3 , where q1 = 5.2 C/

Brrunno [24]

Answer:

Current through the surface at t = 1.1 s is 21.37 A.

Explanation:

The charge is passing through a surface of area varies with time as :

$q=q_1t^3+q_2t+q_3$

Here,

$q_1=5.2\ C/s^3\\\\q_2=2.5\ C/s\\\\q_3=6.5\ C$

t is in seconds

$q=5.2t^3+2.5t+6.5$

The rate of change of electric charge is called electric current. It is given by :

$I=\dfrac{dq}{dt}\\\\I=\dfrac{d(5.2t^3+2.5t+6.5)}{dt}\\\\I=15.6t^2+2.5$

At t = 1.1 s, Current,

$I=15.6(1.1)^2+2.5\\\\I=21.37\ A$

So, the instantaneous current through the surface at t = 1.1 s is 21.37 A.

3 0

3 years ago

A skateboarder is moving at 2.00m/s and increases his velcity at a rate of 1.6m/s/s for 6.0 seconds. What is the displacement of

MrRissso [65]

Answer:

S = 40.8m

Explanation:

Given the following data;

Initial velocity, u = 2m/s

Acceleration, a = 1.6m/s²

Time, t = 6secs

Required to find the displacement

Displacement, S = ?

The displacement of an object is given by the second equation of motion;

$S = ut + \frac {1}{2}at^{2}$

Where;

S represents the displacement measured in meters.

u represents the initial velocity measured in meters per seconds.

t represents the time measured in seconds.

a represents acceleration measured in meters per seconds square.

Substituting into the equation, we have;

$S = 2*6 + \frac {1}{2}*(1.6)*6^{2}$

$S = 12 + 0.8*36$

$S = 12 + 28.8$

S = 40.8m

Therefore, the displacement of the skateboarder during this game is 40.8 meters.

7 0

3 years ago

An alpha particle is identical to a(n) _____.

Musya8 [376]

The correct answer is helium nucleus. An alpha particle has a two neutrons and protons that formed together into a particle which also happens to be very identical to the helium nucleus. However, the helium particles that are being produced by particle accelerator are less to be referred as an alpha particle.

7 0

3 years ago

Read 2 more answers

Alvin paddled for 44 hours with a 33-km/h current to reach a campsite. The return trip against the same current took 77 hours.

sveta [45]

Answer:

121km/h

Explanation:

Let speed of boat=xkm/h

Speed of water flow=33 km/h

Speed upstream=(x-33)km/h

Speed downstream=(x+33)km/h

Time=44 hrs

Time =77 hrs

We have to find the speed of boat.

$Distance=Speed\times time$

Using the formula

Upstream distance=Downstream distance

$(x-33)\times 77=(x+33)\times 44$

$77x-2541=44x+1452$

$77x-44x=1452+2541$

$33x=3993$

$x=\frac{3993}{33}=121$

Hence, the speed of boat=121km/h

8 0

3 years ago

What is water scarcity?

ExtremeBDS [4]

Answer:

Water scarcity can mean scarcity in availability due to physical shortage, or scarcity in access due to the failure of institutions to ensure a regular supply or due to a lack of adequate infrastructure.

Explanation:

4 0

2 years ago