Force of attraction between the Earth(m=5.98x10^24) and a 70 kg student. distance of 6.38x10^6

Answers

Answer 1

Answer: F=G(m₁m₂/r²)
= 9.81(70*5.98x10²⁴/6.38x10⁶)
=9.81(6.56x10³¹)
=6.44x10³²

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When a machine is used to perform a task, work output is always more than work input. please select the best answer from the choices provided t f?

Answers

properly input current above 40 voltage or 100 for example elecrical fan machine is used to perform a task, work output is always more than work

21 point
Which of the following is an example of an allele?
axial flowers
all of the above
1
a
2
ОО
AA
3
Previous

Answers

Answer:

Explanation:

This is flower which is the example of allele

Most atoms in the Sun exist as:

A)solids
B)liquids
C)plasma

Answers

Most atoms in the Sun exist as Plasma, god bless u

u did it the way i asked. nice lol. its plasma btw

A worker kicks a flat rock lying on a roof. The rock slides up the incline 10.0 m to the apex of the roof, and flies off the roof as a projectile. What maximum height (in m) does the rock attain? Assume air resistance is negligible, vi = 15.0 m/s, μk = 0.425, and that the roof makes an angle of θ = 42.0° with the horizontal. (Assume the worker is standing at y = 0 when the rock is kicked.)

Answers

The maximum height that the rock attains is : 7.42 m

Given data :

Vi = 15.0 m/s

uk = 0.425

angle made by roof ( θ ) = 42.0°

Calculating the maximum height reached by the rock

First step : calculate the deceleration of the rock

a = g*sinθ + uk * g * cosθ

= 9.8 * sin 42° + 0.425 * 9.8 * cos 42°

= 9.65 m/s²

Applying motion formula

v² = u² + 2as

= 15² - 2 * 9.65 * 10

v = 5.66 m/s

Initial height attained ( h₁ ) = 10 sin θ

= 10 * sin 45°

= 6.69 m

considering vertical height

V (y) = v sin θ

= 5.66 sin 42

= 3.79 m/s

Next step : Calculate height ( h₂ )

v² = u² + 2 a s

0 = 3.79² - 2 * 9.8 * h₂

therefore : h₂ = 0.73 m

The maximum height attained by the rock ( H ) = h₁ + h₂

= 6.69 + 0.73 = 7.42 m

Hence we can conclude thatThe maximum height that the rock attains is : 7.42 m

Learn more about projectile : brainly.com/question/24216590

Answer:

h = 7.42 m

Explanation:

deceleration of the rock

$a = g sin \theta + \mu_kgcos \theta$

$a = 9.8 sin 42^0+0.425* 9.8 * cos 42^0$

a = 9.65 m/s²

using formula

v² = u² + 2 a s

v² = 15² - 2×9.65 × 10

v = 5.66 m/s

the height attained is

h₁ = 10 sin θ

= 10 sin 42

= 6.69 m

now with vertical velocity it will reach to the height h₂

v y = v sin θ

= 5.66 sin 42

= 3.79 m/s

height is

v² = u² + 2 a s

0 = 3.79² - 2 × 9.8 ×h₂

h₂ = 0.73 m

the maximum height is

h = h₁ + h₂

= 6.69 + 0.73

h = 7.42 m

Why is the water vapor fresh water when it rises from the ocean?

Answers

Because when the water is heated by the sun, the salt sinks to the bottom.

leaves the salt behind

When Tito lifts the heaviest object he can, he is testing his _____.

Answers

When Tito lifts the heaviest object he can, he is probably testing his ability to lift weight. In other words, he could also be testing his upper body muscle strength. The process is called weight-lifting and it is designed to test the muscle strength of your upper body.

Explanation : When Tito lifts the heaviest object, he is testing his strength.

We know, strength is the quality of the physical energy and potential of the person. The strength of the person is power and his capacity.

So, we can say that When Tito lifts the heaviest objects then he is testing his strength, potential, and power.

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