A force of 348.0 N is used to push a car 33.4 m horizontally in 3.21 s. Calculate the power developed.

Physics

1 answer:

Alekssandra [29.7K]3 years ago

7 0

Answer:

3620.9 Watts

Explanation:

So first you want to find the work (J) and to find the work you need to multiply force (N) times distance (m).

348.0*33.4=11623.2 J

After that you want to find the power (Watt) and to find the power you need to divide the work (J) by the time (s).

11623.2/3.21=3620.9 Watts

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A neutron star has a mass of between 1.4-2.8 solar masses compressed to the size of:

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The correct answer is D. An average city

Explanation:

A neutron star differs from others due to its massive density, this means a lot of matter is compressed in a small area. Indeed, neutron stars have a mass of around 1.4 to 2.8 times the mass of the sun. But these are considerably small as they only measure around 20 kilometers, which is the size of an average city. Additionally, neutron stars are this dense because they are the result of a regular star exploding, which leads to a super-dense core, or neutron star. In this context, the mass of a neutron star is compressed to the size of an average city.

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2 years ago

A spherical weather balloon is filled with hydrogen until its radius is 4.40 m. Its total mass including the instruments it carr

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Answer:

4515.49484 N

4329.10484 N

Explanation:

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m = Mass of balloon with instruments = 19 kg

g = Acceleration due to gravity = 9.81 m/s²

Volume of balloon

$v=\frac{4}{3}\pi r^3\\\Rightarrow v=\frac{4}{3}\pi 4.4^3\\\Rightarrow v=356.8179\ m^3$

The Buoyant force = Weight of the air displaced

$F=\rho vg\\\Rightarrow F=1.29\times 356.8179\times 9.81\\\Rightarrow F=4515.49484\ N$

The buoyant force acting on the balloon is 4515.49484 N

Net force on the balloon

$F_n=F-W\\\Rightarrow F_n=4515.49484-19\times 9.81\\\Rightarrow F_n=4329.10484\ N$

The net force on the balloon is given by 4329.10484 N

As the balloon goes up the pressure outside reduces as the density of air decreases while the air pressure inside the balloon is high hence, the radius of the balloon tend to increase as it rises to higher altitude.

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2 years ago

The Jensens dccided to spend their family vaeation white water rafting. During one segment of their trip down the river, the raf

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Answer:

24,187.04 J ≈ 24,200 J

Explanation:

mass (m) = 544 kg

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final speed (v) = 15.2 m/s

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acceleration due to gravity (g) = 9.8 m/s^{2}