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3 years ago

COULD YOU PLEASE ANSWER ALL THESE QUESTIONS :/

Physics

1 answer:

Rzqust [24]3 years ago

8 0

Answer:

Aerobic Fitness, Muscular Fitness, Flexibility, and Stability and Balance.

Explanation:

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A bullet with a mass ????b=13.5 g is fired into a block of wood at velocity ????b=249. The block is attached to a spring that ha

larisa86 [58]

Answer:

$M = 0.436 kg$

Explanation:

As per energy conservation we can say that energy stored in the spring at the position of maximum compression must be equal to the kinetic energy of bullet and block system

so here we have

$\frac{1}{2}(m + M)v^2 = \frac{1}{2} kx^2$

here we know that

k = 205 N/m

x = 35 cm

$\frac{1}{2}(m + M)v^2 = \frac{1}{2}(205)(0.35)^2$

now by momentum conservation we know that

$mv_o = (m + M)v$

$v = \frac{m}{m + M} v_o$

now plug in all values in it

$v = \frac{0.0135}{0.0135 + M}(249)$

now from above equation

$\frac{1}{2}(0.0135 + M)( \frac{0.0135}{0.0135 + M}(249))^2 = 12.56$

$\frac{5.65}{0.0135 + M} = 12.56$

by solving above equation we have

$M = 0.436 kg$

3 0

4 years ago

If the rotation of a planet of radius 5.32 × 106 m and free-fall acceleration 7.45 m/s 2 increased to the point that the centrip

leonid [27]

Answer:

v = 6295.55 m/s

Explanation:

Given that,

The radius of a planet, $r=5.32\times 10^6\ m$

The free fall acceleration of the planet, a = 7.45 m/s²

We need to find the tangential speed of a person standing at the equator.

Also, the centripetal acceleration was equal to the gravitational acceleration at the equator.

We know that,

Centri[etal acceleration,

$a=\dfrac{v^2}{r}\\\\v=\sqrt{ar}\\\\v=\sqrt{5.32\times10^6\times 7.45}\\\\v=6295.55\ m/s$

So, the tangential speed of the person is equal to 6295.55 m/s.

3 0

3 years ago

Boyle's law says that the volume of a gas varies inversely with the pressure. when the volume of a certain gas is 5l, the pressu

Mrac [35]

Boyle's law states:
pV = C, where p = pressure, V = volume, C = constant.

Therefore,
p1V1 = p2V2

And the,
p2 = p1V1/V2
p1 = 512 kPa
V1 = 5l
p2 =?
V2 = 4l

Therefore,
p2= 512*5/4 = 640 kPa

8 0

4 years ago

An atom of element X has one more

dimaraw [331]

Answer:

Rubidium or Rb

Explanation:

Use the periodic table, the period numbers are number of shells while the group numbers are numbers of valence electrons

7 0

3 years ago

How long will it take to travel in a her 2,000 miles at a constant speed of 500 mph?

blondinia [14]

2000 divided by 500. 4 hours
2000miles divides by miles per HOUR.

3 0

3 years ago

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