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RideAnS [48]
2 years ago
14

Which one of the following is not a balanced equation

Physics
1 answer:
KATRIN_1 [288]2 years ago
5 0

Answer:

A

Explanation:

i am not to sure!?!?!

sorry hopes this helps

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An object has a position given by r = [2.0 m + (5.00 m/s)t] i^ + [3.0m−(2.00 m/s2)t2] j^, where all quantities are in SI units.
makkiz [27]

Answer:

Acceleration of the object is 4\ m/s^2.

Explanation:

It is given that, the position of the object is given by :

r=[2\ m+(5\ m/s)t]i+[3\ m-(2\ m/s^2)t^2]j

Velocity of the object, v=\dfrac{dr}{dt}

Acceleration of the object is given by :

a=\dfrac{d^2r}{dt^2}

a=\dfrac{d^2}{dt^2}([2\ m+(5\ m/s)t]i+[3\ m-(2\ m/s^2)t^2]j)

Using the property of differentiation, we get :

a=\dfrac{d^2r}{dt^2}=-4\ m/s^2

So, the magnitude of the acceleration of the object at time t = 2.00 s is 4\ m/s^2. Hence, this is the required solution.

5 0
2 years ago
A submarine sends a signal and receives an echo after 5 seconds. Calculate the speed of sound if distance of object from submari
Reil [10]

speed = distance \div time
Since the sound travels from the submarine to the object AND back, it actually travelled 3625x2=7250m.

7250 \div 5 = 1450
Speed of sound: 1450m/s
3 0
3 years ago
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Use at least two to three completed content related sentences to explain why physics is considered the basic science. Provide at
Virty [35]
Idk your answer sorry
6 0
3 years ago
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Find the mass of a sample that has a dersity of 2 g/mL and a volume of 10 mL
In-s [12.5K]

Answer:

mass = volume x density.

Explanation:

2 x 10 = 20g

4 0
2 years ago
The magnetic field strength at the north pole of a 2.0-cmcm-diameter, 8-cmcm-long Alnico magnet is 0.10 TT. To produce the same
horrorfan [7]

Answer:

2653 turns

Explanation:

We are given that

Diameter,d=2 cm

Length of magnet,l=8 cm=8\times 10^{-2} m

1m=100 cm

Magnetic field,B=0.1 T

Current,I=2.4 A

We are given that

Magnetic field of solenoid and magnetic are same and size of both solenoid and magnetic are also same.

Length of solenoid=8\times 10^{-2} m

Magnetic field of solenoid

B=\frac{\mu_0NI}{l}

Using the formula

0.1=\frac{4\pi\times 10^{-7}\times 2.4\times N}{8\times 10^{-2}}

Where \mu_0=4\pi\times 10^{-7}

N=\frac{0.1\times 8\times 10^{-2}}{4\pi\times 10^{-7}\times 2.4}=2653 turns

6 0
2 years ago
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