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3 years ago

Which object will sink in freshwater, which has a density of 1.0 g/cm3?

Physics

2 answers:

Alecsey [184]3 years ago

7 0

Answer:

The answer is B.

Explanation:

Pani-rosa [81]3 years ago

6 0

Answer:

Object 2, which has a density of 1.9 g/cm3, since it has more density than freshwater.

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Technician A says that the radiator should always be inspected for leaks and proper flow before installing a rebuilt engine. Tec

Slav-nsk [51]

Answer:

Both the technicians are right so option C is correct

Explanation:

Both the technicians are right so option C is correct

while installing a rebuilt engine, it is necessary to inspect the leaks and proper flow because if there is leak then cooling oil will flow out of the engine which results in engine heating. Secondly flow should be proper otherwise the oil will not reach to all parts and may cause heating of some parts of engine.

If the cooling fan is defective it won't be suck enough heat from engine and it will also cause heating.

8 0

3 years ago

7. A very wealthy donor decides to give a large sum of money to your college or university to build the world's largest visible-

FromTheMoon [43]

Answer:

the correct answer is d

on a tall, dry mountain peak

Explanation:

A telescope is an instrument that allows the observation of distant bodies whose light is very dim, for this the telescope concentrates a large amount of light with large diameter lenses or mirrors.

The location of a telescope must take into account several aspects:

* The most important that there are no nearby lights that disturb the observation, so it must be away from cities and other strong light sources.

* The climate should be as stable as possible with few temperature variations, to prevent the optical surfaces from fogging up and reducing the thermal expansion that changes the length of the instrument.

* You must choose a place with little rain and therefore little amount of clouds

Based on these needs we can answer which luxury will be the most suitable

a) There is a lot of light nearby

b) there is a lot of humidity and wind

c) there is a lot of light

d) This is an ideal place with low light, low humidity and stability in the climate

e) lots of humidity and light

so the correct answer is d

7 0

3 years ago

(1 point) Suppose a spring with spring constant 1 N/m is horizontal and has one end attached to a wall and the other end attache

fredd [130]

Answer:

Explanation:

Given that,

The spring constant

K = 1N/m

Frequency of motion

f = 14Hz

We want calculate the mass m?

The frequency of spring system is related to the mass by

From w = √k/m

Where w = 2πf

f = 1/2π √k/m

Where,

w is angular frequency in rad/s

m is mass of object attached in kg

k is the spring constant in N/m

f Is the frequency in Hz

Then, make m subject of formula

Multiply both sides by 2π

2πf = √k/m

Square both sides

4π²f² = k/m

Then, k= 4π²f² × m

m = k / 4π²f²

m = 1 / (4π² × 1.4)

m = 1 / 55.27

m = 0.0181 kg

m= 18.1 g

The mass of the object attached in 18.1 g or 0.0181 kg

4 0

3 years ago

At a particular instant the magnitude of the gravitational force exerted by a planet on one of its moons is 7 × 1021 N. Collapse

9966 [12]

Answer:

Fg = 4.2*10²² N

Explanation:

The gravitational force between any two masses, provided that can be approximated by point masses (comparing their diameters with the distance between them), obeys the Newton's Universal Law of Gravitation, which states that the force (always attractive) is proportional to the product of the masses and inversely proportional to the square of the distance between them (this as a consequence of our Universe being three-dimensional), as follows:

$Fg =\frac{G*m1*m2}{r^{2}}$

So, if one of the masses increases 6 times, the force between them will be directly 6 times larger, so the new magnitude of the force will be as follows:

Fg₂ = Fg₁*6 = 7*10²¹ N* 6 = 4.2*10²² N

7 0

3 years ago

An object with a mass of 5.0 kg accelerates 8.0 m/s² when an uknown force is applied to it. what is the amount of the force?

Harman [31]