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luda_lava [24]
2 years ago
12

8.

Physics
1 answer:
crimeas [40]2 years ago
6 0

Answer:

D. the distance and direction to the water fountain

Explanation:

To describe the position of a water fountain relative to where one is standing, the distance and direction to the water fountain must be known.

This quantity is known as the displacement.

  • Displacement is a vector quantity with both magnitude and direction.
  • To specify the magnitude of a displacement, we use the length of path and in this case the height or sometimes the distance.
  • The direction attribute distinguishes distance from displacement
  • The perfect quantity to solve this problem is the displacement and it specifies the distance of the path and the direction traveled.
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Riding in a car, you suddenly put on the brakes. As you experience it inside the car, do Newton's law apply? Do they apply as se
alisha [4.7K]

Answer with Explanation:

Newton's laws are applicable for inertial frames of reference which is a frame which is not accelerating when seen from the observer standing on earth.

For the person as he presses the brakes his frame is a decelerating frame of reference hence he cannot apply the newtons laws of motion as they are in their original form but if he analyses the motion he has to apply a correction known as  pseudo-force on the object he is analyzing. Pseudo Force has no basis in newton's laws but are a correction that needs to be applied if he wishes to analyse the motion from non inertial frame of reference

While as a person standing on earth outside the car since his frame is an inertial frame of reference he can apply newton's laws of motion without any correction.  

3 0
3 years ago
Compare the foot of mollusks with the tube feet of echinoderms.
stira [4]

Mollusks live in fresh water, in marine environment, but also on land.

<span>Echinoderms live only in water. This is the reason why they have developed different systems for moving. Mollusks have only singular muskullus foot for walking and Echinoderms have tube feet which they use for moving, as well for collecting and transporting food to their mouth. </span>



4 0
3 years ago
A brick is lying on a table in a state of static equilibrium. If the mass of the brick is 7.52 kilograms, what is the normal for
frez [133]
In mechanics, the normal force<span> is the component, perpendicular to the surface (surface being a plane) of contact, of the contact </span>force<span> exerted on an object . We calculate as follows:

</span>∑F along x = 0 = F - Fn
<span>
Fn = F = mg = 7.52(9.81) = 73.77 N <------OPTION B</span>
5 0
2 years ago
Who is the father of nuclear physics?​
bija089 [108]

Answer: the father of the nuclear physics is Ernest Rutherford

Explanation:

5 0
3 years ago
In the fall of 2002, a group of scientists at Los Alamos National Laboratory determined that the critical mass of neptunium-237
Llana [10]

The concepts required to solve this problem are those related to density, as a function of mass and volume. In turn, we will use the geometric concept defined for the volume.

The relationship between volume, density and mass is given under the function

\rho = \frac{m}{V}

Here,

m = Mass

V = Velocity

Rearranging for the Volume,

V = \frac{m}{\rho}

With our information the volume is

V = \frac{60kg}{19.5g/cm^3 (\frac{10^3kg/m^3}{1g/cm^3})}

V = 3.0769*10^{-3}m^3

Now the volume of sphere is expressed as

V = \frac{4}{3} \pi r^3

Here r is the radius of Sphere, then rearranging to find the radius we have

r = \sqrt[3]{\frac{3V}{4\pi}}

r = \sqrt[3]{\frac{3(3.0769*10^{-3})}{4\pi}}

r = 0.0902m

Therefore the radius of a sphere made of this material that has a critical mass is 9.02cm

8 0
3 years ago
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