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Ghella [55]
2 years ago
12

9.The force of gravity between two asteroids is 10,000 newtons (N).

Physics
1 answer:
MakcuM [25]2 years ago
6 0

Answer:

F1 = G m1 m2 / R^2        force of attraction

F2 = G m1 m2 / (R/2)^2

F2 / F1 = 4       the force of gravity will be quadrupled

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Sheila weighs 60 kg and is riding a bike. Her momentum on the bike is 340 kg • m/s. The bike hits a rock, which stops it complet
Vikki [24]

Answer:

v₂ = 5.7 m/s

Explanation:

We will apply the law of conservation of momentum here:

Total\ Initial\ Momentum = m_{1}v_{1} + m_{2}v_{2}\\

where,

Total Initial Momentum = 340 kg.m/s

m₁ = mass of bike

v₁ = final speed of bike = 0 m/s

m₂ = mass of Sheila = 60 kg

v₂ = final speed of Sheila = ?

Therefore,

340\ kg.m/s = m_{1}(0\ m/s) + (60\ kg)v_{2}\\v_{2} = \frac{340\ kg.m/s}{60\ kg}\\\\

<u>v₂ = 5.7 m/s </u>

6 0
3 years ago
A 524-Hz longitudinal wave in air has a speed of 345 m/s. (a) What is the wavelength? (b) How much time is required for the phas
zhuklara [117]

Answer: a) 152 cm

b) 0.725 ms

c) 10°

Explanation:

Given

Frequency of the wave, f = 524 Hz

Speed of the wave, v = 345 m/s

Wavelength of the wave, λ = ?

The relation for wavelength is given by

λ = f/v, on substituting

λ = 524 / 345

λ = 1.52 m or 152 cm

T = 1/v

T = 0.0029 s

T = 2.9 ms.

Note that the phase change is 90°, thus the time required to change the phase by 90° is

t = 2.9 * (90 / 360)

t = 2.9 * 0.25

t = 0.725 ms

The phase difference at a particular instance 4.4 cm apart is

= (4.4 / 152) * 360

= 0.02895 * 360

= 10.422°

a) 152 cm

b) 0.725 ms

c) 10°

5 0
3 years ago
What element is used for lightbulb
Artemon [7]
<span>Lightbulbs are filled with the element argon and the filaments are made of metallic element tungsten. The argon in the bulb protects the filament from the surrounding air, which would otherwise oxidize the filament. </span>
5 0
3 years ago
If the bore of an engine is increased without any other changes except for the change to proper-size replacement pistons. the di
Nitella [24]

Answer:

increase, increase

Explanation:

If the bore of an engine is increased without any other changes except for the change to proper-size replacement pistons. the displacement will<u> increase </u>and the compression rate will <u>increase</u>.

Further Explanation:

If the bore is increased, there are several benefits to this. There is more area for the valves this improves flow through the engine. The compression ratio will increase, thereby increasing thermal efficiency. The displacement also increases as the power output increase. Also, higher RPM will further increase power.

However, a decrease in bore will result in corresponding reduction in displacement and power output.

7 0
3 years ago
The eyepiece of a compound microscope has a focal length of 2.50 cm and the objective has a focal length of 1.60 cm. The two len
larisa [96]

The angular magnification of the microscope is 78.125.

<h3>What is angular magnification?</h3>

the ratio of the angle at the eye that an optical instrument's image occupies to the angle at the eye that an object occupies while not being viewed through an optical instrument is called as angular magnification.

Thus we can calculate it as:

  • focal length of objective lens, fo = 1.6 cm
  • focal length of the eyepiece, fe = 2.5 cm
  • Distance between the lenses, L = 15 cm
  • Least distance of distinct vision for normal eye, d = 25 cm

The formula for the magnification of the compound microscope is given by

M = - \frac{(L-f{e} )d}{fa fe}

M = - \frac{(15-2.5 )25}{(1.6) 2.5}

M = - 78.125

Thus, the magnification of the compound microscope is 78.125.

Learn more about angular magnification here:

brainly.com/question/17327671

#SPJ4

4 0
2 years ago
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