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Eduardwww [97]
3 years ago
7

An object has a relativistic momentum that is 8.30 times greater than its classical momentum. What is its speed?

Physics
2 answers:
Mrrafil [7]3 years ago
6 0

Answer:

v = .992 c.

Explanation:

In relativistic mechanics , momentum

mv=\frac{m_0v}{\sqrt{1-\frac{v^2}{c^2} } }

c is velocity of light  , m₀ is rest mass and v is velocity of the body..

Given

\frac{mv}{m_0v} = 8.3

\sqrt{1 -\frac{v^2}{c^2} } = \frac{1}{8.3}

Solving for v

v = .992 c.

Advocard [28]3 years ago
4 0

Answer:

Speed of the object, v = 0.99 c

Explanation:

It is given that, an object has a relativistic momentum that is 8.30 times greater than its classical momentum.

The relativistic momentum is given by, p=\dfrac{m_ov}{\sqrt{1-\dfrac{v^2}{c^2}}}

Classical momentum, p' = mv

According to the given condition,

p = 8.3 p'

\dfrac{m_ov}{\sqrt{1-\dfrac{v^2}{c^2}}}=8.3\times m_ov

\sqrt{1-\dfrac{v^2}{c^2}}=\dfrac{1}{8.3}

1-\dfrac{v^2}{c^2}=0.01451

\dfrac{v^2}{c^2}=0.985

v=0.99c, c is the speed of light

So, the speed of the object is 0.99 c. Hence, this is the required solution.

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alexandr1967 [171]

Answer:

The toy's energy is 18 J.

Explanation:

We have, a 4 kg toy is lifted off the ground and falls at 3 m/s. It is required to find toy's energy.

The toy will have kinetic energy due to its motion. The energy is given by :

E=\dfrac{1}{2}mv^2\\\\E=\dfrac{1}{2}\times 4\times 3^2\\\\E=18\ J

So, the toy's energy is 18 J.

7 0
3 years ago
What is the acceleration of a rocket that speeds up from 50 m/s to 1000 m/s in 3 seconds?
Zepler [3.9K]

Answer:

= 316.67 m/s^2

Explanation:

Acceleration formula =

A = \frac{V_{f}  - V_{i} }{t}

A = \frac{1000 - 50}{3}

= \frac{950}{3}

= 316.67 m/s^2

8 0
3 years ago
Which best describes the surface of a concave mirror? It is flat. It is textured. It curves outward. It curves inward.
Sonja [21]

The concave mirror is a spherical-shaped mirror that has an inner curved surface. Hence, option (4) is correct.

What is a concave mirror?

The concave mirrors are spherical-shaped mirrors that are painted on the outward surface. It is also known as the converging mirror, having the recessed inner reflecting surface.

  • The concave mirrors are generally used for the purpose to focus the light. For that, they might have a reflecting surface, curved inwards, and the reflection of light is limited to the single focal point.
  • The reflecting surface of the concave mirror has its vertex or midpoint lying farther away from the objects than the edges.

Thus, we can conclude that the surface of the concave mirror is curved inward. Hence, option (4) is correct.

Learn more about the concave mirror here:

brainly.com/question/13300307

8 0
2 years ago
A person who weighs 864 N is riding a 85-N mountain bike. Suppose the entire weight of the rider plus bike is supported equally
svetoff [14.1K]

Answer:

A=60.06 x 10⁻⁵ m²

Explanation:

Given that

Weight of the person = 864 N

Weight of the bike = 85 N

The total weight ,car + bike ,Wt= 864 + 85 N

 Wt = 949 N

2 p = 949 N

The weight on the each tire(F) = 474.5  N

P = 7.9 x 10 ⁵  Pa

We know that

Force = Pressure x Area

F= P A

By putting the values

474.5 =  7.9 x 10 ⁵  A

A=60.06 x 10⁻⁵ m²

Therefore area of contact A

A=60.06 x 10⁻⁵ m²

4 0
3 years ago
How are electric fuses rated
vitfil [10]

Answer:

The fuse rating can be calculated by dividing the power used by the appliance by the voltage going into the appliance.

Explanation:

(AMPS)=P(watts)÷V(Voltage)

6 0
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