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Leya [2.2K]
3 years ago
5

A car initially traveling at 15 m/s speeds up at a constant rate of 2.0 m/s2 for 3 seconds. The velocity of the car at the end o

f the 3 second interval is _________ m/s.
Physics
1 answer:
timofeeve [1]3 years ago
8 0

Answer:

Vf = 21 m/s

Explanation:

Data:

  • Initial Velocity (Vo) = 15 m/s
  • Acceleration (a) = 2.0 m/s²
  • Time (t) = 3 s
  • Final Velocity (Vf) = ?

Use formula:

  • Vf = Vo + a * t

Replace:

  • Vf = 15 m/s + 2.0 m/s² * 3s

Multiply the acceleration with time:

  • Vf = 15 m/s + 6 m/s

Solve the sum:

  • Vf = 21 m/s

The velocity of the car at the end of the 3 second interval is <u>21 meters per second.</u>

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Jlenok [28]

Answer:

a is the answer

Explanation:

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A spherical drop of water carrying a charge of 42 pC has a potential of 620 V at its surface (with V = 0 at infinity). (a) What
iren [92.7K]

Answer:

0.0006091222 m

Explanation:

q = Charge = 42 pC

V = Voltage = 620 V

\epsilon_0 = Permittivity of free space = 8.85\times 10^{-12}\ F/m

Electric potential is given by (at r = R)

V=\dfrac{q}{4\pi\epsilon R}\\\Rightarrow R=\dfrac{q}{4\pi\epsilon V}\\\Rightarrow R=\dfrac{42\times 10^{-12}}{4\pi\times 8.85\times 10^{-12}\times 620}\\\Rightarrow R=0.0006091222\ m

The radius of the drop is 0.0006091222 m

3 0
3 years ago
A sample of the mineral calcite has a volume of 15 cm³ and a mass of 40.5 g. What is the density of the calcite?A.0.37 g/cm³B.2.
maxonik [38]

Given data:

Volume of calcite (V) = 15 cm³,

mass of calcite (m) = 40.5 g,

find the

            density of calcite (ρ) = ?

density is defined as " it is the amount of matter of an object in a given volume". Simply it is the ratio of matter in an object to its volume. The unit of density is kg/m³ in SI system or g/cm³ in CGS system.

Mathematically,

                         density ( ρ) = mass/volume    

                                            = m/V     g/cm³

                                            = 40.5 g/15 cm³

                                            = 2.7 g/cm³

Hence, the density of calcite is <em>2.7 g/cm³ </em>  




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3 years ago
What is the giant impact hypothesis for the origin of the moon?
tia_tia [17]

The big impact theory is the most widely accepted scientific theory to explain the formation of the moon, which it posits that it originated as a result of a collision between the young earth and a protoplanet the size of Mars, which is called Tea or occasionally orphheus. or orpheus

7 0
2 years ago
CO
krek1111 [17]

Answer:0.12 amperes

Explanation:

voltage=17.6v

Resistance=165.5 ohms

Current=voltage ➗ resistance

Current=17.6 ➗ 165.5

Current=0.12 amperes

5 0
3 years ago
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