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netineya [11]
3 years ago
9

What is the acceleration if we speed up from 10m/s to 30 m/s in 10 seconds

Physics
1 answer:
lina2011 [118]3 years ago
3 0
Acceleration= change in speed/ change in time

30-10= 20 (change in speed)
Time= 10 seconds

20/10= 2
Acceleration= 2 m/s^2

Hope this helps! :)
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A solar-powered car has a kinetic energy of 110250 J. Its mass is 180 kg. Work out how fast the car is travelling.
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Read 2 more answers
A current density of 7.3 × 10−13 A/m2 exists in the atmosphere where the electric field (due to charged thunderclouds in the vic
11111nata11111 [884]

Answer:

σ = 1.52 10⁻¹²   1 /Ω m

Explanation:

The current density is linear in the atmosphere, so it complies with Ohm's law

         J = σ E

Where J is the current density, sigma is the electrical inductance and E is the electric field

         σ = J / E

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6 0
3 years ago
When a certain air-filled parallel-plate capacitor is connected cross a battery, it acquires a charge (on each plate) of 160 µC.
ozzi

Answer:

k = 2.45

Explanation:

It is given that,

Charge acquired on each plate of the capacitor due to a battery, q=160\ \mu C

If V is the potential difference across the plates, capacitance in air is given by :

C_a=\dfrac{q}{V}=\dfrac{160}{V}.............(1)

Let k is the dielectric constant of the dielectric slab. While the battery connection is maintained, a dielectric slab is inserted into and fills the region between the plates. This results in the accumulation of an additional charge of 220 µC on each plate.

New charge becomes, Q=220\ \mu C+220\ \mu C=440\ \mu C

C_d=\dfrac{Q}{V}=\dfrac{440}{V}.............(2)

The dielectric constant of the dielectric slab is given by :

k=\dfrac{C_d}{C_a}

k=\dfrac{440}{160}

k = 2.45

So, the dielectric constant of the dielectric slab is 2.45. Hence, this is the required solution.

7 0
3 years ago
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