If the force remains unchanged, pushing a box three times farther requires three times more work because work is directly proportional to distance in the work formula W = F × d.
The student is asking about the work required to push a box across a room. In Physics, work is defined as the product of the force applied to an object and the distance over which it is applied, assuming force and distance are in the same direction. The formula for work is W = F × d, where W is work, F is the constant force applied, and d is the distance the object moves.
Assuming the same constant force is applied to the box if a student needs to push the box three times farther, they would do three times more work. This is because work is linearly proportional to the distance if the force remains unchanged. To illustrate, if pushing the box over a certain distance requires W joules, then pushing it three times that distance requires 3W joules of work.
#SPJ12
Answer:
Removing some of the books reduced the mass of the box, and less force was needed to push it across the floor.
I think you are right on 1,2 and 4. I believe the answer would be D?!
hope this helps
Answer:
bend toward the normal line
Explanation:
When light passes from a less dense to a more dense substance, (for example passing from air into water), the light is refracted (or bent) towards the normal. In your question the light is moving from rarer to denser medium
Upon refracting from air to glass, light will bend towards the normal line, reducing the angle of incidence due to the principle of Snell's Law, which governs how light refracts between media. However, the exact refracted angle cannot be determined without the refractive indices of air and glass.
According to the Law of Refraction, also known as Snell's Law, light changes direction when it passes from one medium to another due to a change in speed, which is determined by the mediums' refractive indices. When light passes from air (a medium with a lower refractive index) into glass (a medium with a higher refractive index), it bends towards the normal line, the imaginary line perpendicular to the surface at the point of incidence.
Given that the angle of incidence is 30 degrees, following the formula of Snell's law: n₁ sin θ₁ = n₂ sin θ₂ where n₁ and n₂ are the refractive indices of air and glass, and θ₁ and θ₂ are the angles of incidence and refraction, we could solve for θ₂ which will be the angle of refraction in glass. However without information of refractive indices of air and glass, an exact angle cannot be determined.
In summary, the light ray will bend towards the normal upon entering the glass, hence decreasing the angle of incidence, according to the Law of Refraction or Snell's Law.
#SPJ3
Nuclei of U-238 atoms are unstable and radioactive isotope of uranium . It decays naturally and emits alpha (α) particle.
The actinide series includes the metallic, silver-gray element uranium (U). It serves as the primary fuel for nuclear reactors and is also a component of nuclear weapons.
Since uranium has an atomic number of 92, its atomic structure consists of 92 protons and 92 electrons. The nucleus of U-238 contains 146 neutrons, but this number can range from 141 to 146. Due to its radioactivity, uranium constantly emits particles and transforms into new elements.
There is a recognized radioactive decay series for uranium. The most prevalent uranium isotopes are U-238 and U-235 (which has 143 neutrons). All three isotopes of uranium (U-238, 235, and 234) are present in nature, and variations from the typical composition are rarely greater than 0.01%.
Learn more about uranium, refer the link:
#SPJ5
Answer:
incomplete information
Explanation:
Where is diagram? no point A and point B given
(and no it doesn't give any options, it can be any device you can think of that uses a Convex lense)
Answer:
Explanation:
Convex lens is the lens which is used to converge the rays of light after refraction.
When the rays of light are coming parallel to the principal axis then after refraction they goes from the focus.
It is used as rear view mirror in automobiles. In this case it pelroduces small and erect image of faroff objects.
It is used in spectacles using for hypermetropia.
It is used in microscopes and telescopes.
Our eye also have a convex lens which forms images on retina.