The first hominine in the genus Homo was named Homo habilis because evidence indicates that members of the species used

Answers

Answer 1

Answer: Homo Habilis was a secies of the tribe Hominini, which lived between 2.4 and 1.5 million years ago. His name means "handy man" or "able man". Homo habilis was short, with disproportionately long arms compared to modern humans. His remains are often acompanied by primitive stone tools. Answer: The species was nemed because evidence indicates that members of the spieces used stone tools.

Answer 2

Answer:

22. anatomy

24. tools

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a 2.9-cm-diameter parallel-plate capacitor has a 2.0 mm spacing. the electric field strength inside the capacitor is

Millikan measured the electron's charge by observing tiny charged oil drops in an electric field. Each drop had a charge imbalance of only a few electrons. The strength of the electric field was adjusted so that the electric and gravitational forces on a drop would balance and the drop would be suspended in air. In this way the charge on the drop could be calculated. The charge was always found to be a small multiple of 1.60 × 10-19 C. Find the charge on an oil drop weighing 1.00 × 10-14 N and suspended in a downward field of magnitude 2.08 × 104 N/C.

Answers

Answer:

$4.8\cdot 10^(-19) C$

Explanation:

For a drop in equilibrium, the weight is equal to the electric force (in magnitude):

$W = F_e$

where here we have

$W=1.00\cdot 10^(-14)N$ is the weight of the drop

$F_e$ is the magnitude of the electric force, which can be rewritten as

$F_e = qE$

where

q is the charge of the oil drop

$E=2.08 \cdot 10^4 N/C$ is the magnitude of the electric field

Substituting into the equation and solving for q, we find the charge of the oil drop:

$q=(W)/(F_e)=(1.00\cdot 10^(-14)N)/(2.08\cdot 10^4 N/C)=4.8\cdot 10^(-19) C$

The Milky Way is located in the _____ Group. Andromeda Local Elliptical Spiral Virgo

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The Milky Way is located in the "local" Group.

The Local Group is the galaxy group that incorporates the Milky Way. The Local Group involves in excess of 54 galaxies, the greater part of them predominate cosmic systems. Its gravitational focus is found somewhere close to the Milky Way and the Andromeda Galaxy. The Local Group has a breadth of 10 Mly (3.1 Mpc) (around 1023 meters) and has a paired (dumbbell) distribution. The gathering itself is a piece of the bigger Virgo Supercluster, which might be a piece of the Laniakea Supercluster.

Final answer:

The Milky Way is located in the Local Group of galaxies and is a spiral galaxy. More than 54 galaxies including Andromeda and the Milky Way are in the group.

Explanation:

The Milky Way is located in the Local Group of galaxies. This group is a collection of more than 54 galaxies, including the Andromeda and Milky Way galaxies, which are the two largest galaxies in the group. The Milky Way is a spiral galaxy, which means it has a flat, spinning disk with a central bulge surrounded by spiral arms. Despite its presence in the Local Group, the Milky Way has no direct connection to the Elliptical or the Virgo groups.

Learn more about Milky Way's location here:

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True or false? Cells in the retina are photo-sensitive.

Answers

Answer:

True

Explanation:

Cells in the retina are indeed photosensitive. The retina is a layer of tissue located at the back of the eye that contains specialized cells called photoreceptors. Photoreceptors are responsible for detecting and responding to light stimuli, converting them into electrical signals that can be transmitted to the brain for visual processing. There are two main types of photoreceptor cells in the retina: rods and cones. Rod cells are highly sensitive to light and are responsible for vision in low-light conditions, while cone cells are responsible for color vision and visual acuity in bright light. Both rods and cones play crucial roles in the visual perception process and are essential for our ability to see.

The water at the top of a waterfall has _____ energy.potential
kinetic
heat
metabolic

Answers

I believe the answer isPOTENTIAL ENERGY. The water at the top of the waterfall has Potential Energy.Potential Energy is defined as the energy that is stored when an object is atrest. At the top of the waterfall, water will have maximum potential energy. Whenthe water falls down, it is will already have kinetic energy which is energythat is produced through continuous motion. When it is finally in the bottom,water will have maximum kinetic energy.

Answer:

The water at the top of a waterfall has __potential___ energy.

At a given location in space, the magnetic field in an electromagnetic wave is increasing. How is the electric field changing at that same location? a. The electric field is increasing.
b. The electric field is decreasing.
c. The electric field is not changing.

Answers

Answer:

Option a) is correct

Explanation:

In the given question option a) ( i.e the electric field is increasing ) is correct.

The above option is correct because the electric field and the electromagnetic wave both are in the same phase of the EM wave. Thus, the electromagnetic wave and the electric field are directly proportional to each other.

Final answer:

In an electromagnetic wave, the electric and magnetic fields are linked, oscillating in phase. Therefore, when the magnetic field is increasing, the electric field is also increasing.

Explanation:

In an electromagnetic wave, the electric field and the magnetic field are perpendicular to each other and they oscillate in phase. This means when the magnetic field is increasing, the electric field is also increasing, and vice versa. So, the correct answer is option a. The electric field is increasing. It's important to keep this correlation in mind while studying electromagnetic waves, as these oscillations and their interplay are fundamental to how these waves propagate through space.

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You use a 1200-watt hair dryer for 10 minutes each day. a. How many minutes do you use the hair dryer in a month? (Assume there are 30 days in the month.) b. How many hours do you use the hair dryer in a month? c. What is the power of the hair dryer in kilowatts? d. How many kilowatt-hours of electricity does the hair dryer use in a month? e. If your town charges $0.15/kWh, what is the cost to use the hair dryer for a month?