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viva [34]
3 years ago
14

Why do we need to have an understanding about impulse and momentum ?

Physics
1 answer:
bonufazy [111]3 years ago
8 0
Impulse is the interval of a force ,f,over the time interval ,t,for which it acts
Formula p=f t
Momentum is the quantity of motion of a moving body measured as a product of its mass and velocity
Formula p=m v
P=momentum
M=mass
V=velocity
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A car (mass = 1090 kg) is traveling at 30.4 m/s when it collides head-on with a sport utility vehicle (mass = 2880 kg) traveling
Thepotemich [5.8K]

Answer:

The sport utility vehicle was traveling at V2= 11.5 m/s.

Explanation:

m1= 1090 kg

V1= 30.4 m/s

m2= 2880 kg

V2= ?

m1*V1 = m2*V2

V2= (m1*V1)/m2

V2= 11.5 m/s

7 0
4 years ago
Which of the following best describes the function of a resistor in an electrical circuit?
KonstantinChe [14]

Answer:

It controls the amount of current.

Explanation:

A resistor helps control and maintain the circuit which is it's main function.

8 0
3 years ago
In the 1980s, the term picowave was used to describe food irradiation in order to overcome public resistance by playing on the w
Lerok [7]

Answer:

E = 1.24MeV

Explanation:

The photon travels at the speed of light, 3.0 × 10^{8} m/s, and given that its frequency = 1 picometer = 1.0 × 10^{-12} m.

Its energy can be determined by;

E = hf

  = (hc) ÷ λ

where E is the energy, h is the Planck's constant, 6.626 × 10^{-34} Js, c is the speed of the light and f is its frequency.

Therefore,

E = (6.626 × 10^{-34}× 3.0 × 10^{8}) ÷ 1.0 × 10^{-12}

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E = 1.9878 × 10^{-13} J

But, 1 eV = 1.6 × 10^{-19} J. So that;

E = \frac{1.9878*10^{-13} }{1.6*10^{-19} }

  = 1242375 eV

∴ E = 1.24MeV

The energy of the photon is 1.24MeV.

5 0
3 years ago
Refractive index of water is 1.3. calculate the speed of light in water.​
wolverine [178]

Answer:

The speed of light is faster in water. The Refractive index of water is 1.3 and the refractive index of glass is 1.5. From the equation n = c/v, we know that the refractive index of a medium is inversely proportional to the velocity of light in that medium. Hence, light travels faster in water.

5 0
3 years ago
Read 2 more answers
Temperature measures: A. how much kinetic energy molecules have. B. the potential energy of molecules. C. how heat flows. D. the
serg [7]
Temperature measures how much kinetic energy molecules have. The faster the kinetic energy, the higher the temperature.
8 0
3 years ago
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