Which of the following best describes a plane? A. A curve in a road
B. The surface of a flat table
C. The edge of a desk
D. The point of intersection of two walls

Answers

Answer 1

Answer: Yes B, The surface of a flat table

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The heat capacity of a sample should be divided by which quantity to find the specific heat capacity?

Answers

The heat capacity of a sample should be divided by the number of moles of a substance to find the specific heat capacity of that substance. For example, the specific heat capacity of methane is 4.475 kJ/kg-K.

a 42.3 kg girl and a 7.93 kg sled are on the surface of a frozen lake, 15.0m apart and linked by a rope, but not moving yet. then the girl pulls on the rope, exerting a 5.76 N force on the sled, pulling it toward her. how far from the girl's original position do they meet?

Answers

Answer:

they meet from the girl's original position at: 2.37 (meters)

Explanation:

We need to use the Newton's law, exactly the second law that relate force, mass and acceleration as: $F=m*a$ with this we can get both accelerations; solving for acceleration $a=(F)/(m)$ . Now $a_(girl)=(5.76)/(42.3)=0.14 (m/s^(2))$ and $a_(sled)=(5.76)/(7.93)=0.73(m/s^(2))$ . Then knowing that they both travel at the same time and assuming that the distance among the girl and the sled is: 15.0-x, so, $x=(1)/(2)*a_(girl)*t^(2)$ and $15.0-x=(1)/(2)*a_(sled)*t^(2)$ , solving for the time we get: $t=\sqrt{(2x)/(a_(girl) ) }$ and $t=\sqrt{(2*(15.0-x))/(a_(sled) ) }$ with this equations we solving for the x that is the distance between the girl and the sled after the apply the force and we get: $\sqrt{(2x)/(a_(girl))} = \sqrt{(2*(15.0-x))/(a_(sled) )$ . Finally we get: $(x)/(a_(girl) )=((15.0-x))/(a_(sled) )$ and replacing the values we have got: $(x)/(0.14) =((15.0-x))/(0.73)$ so $5.33*x=15-x$ so x=2.37 (meters).

What is the pair of vectors if summed , would create of equilibrium (a resultant of 0i + 0j) ?

Answers

ANY pair of vectors can produce that resultant, as long as ...

If one of the vectors is V₁ = A i + B j . . . . . . where 'A' and 'B' are any two numbers,

then the other one is V₂ = -A i - B j

Answer:

Explanation:

I just took the lab

What color will a star be with a surface temperature of 5000–6000 K? A. blue
B. red
C. yellow
D. white

Answers

Answer:

C. yellow

Explanation:

The stars have different color depending on their temperature, in general the more blue or violet a star is, the higher its surface temperature, and the more orange or red, the lower its surface temperature.

In the stellar classification, stars with temperatures ranging from 5000K to 6000K are G type stars which are characterized by having a yellow color.

An example of a G-type star is the sun, which has a surface temperature of around 5700K.

the answer is C. yellow and am 100% sure ...

You're taking your first dive in ALVIN (Fig 10.13) to witness a hot spot on the ocean floor. As you descend and arrive on site, what are your first impressions?

Answers

Answer:

Explanation:

The experience is magnanimous and wonderful when witnessing the hotspot site. It was a great feeling! I could witness the red hot lava oozing out to the ocean floor from the subsurface like water from a hot-spring, and immediately, a cooling effect occurs. At that current time, the gas was coming up in the form of gas bubbles. I believed there was a mini-volcano located inside the ocean! The scene was fascinating, just like inserting a red-hot metallic-iron ball into the cool water, thereby creating a fizzing of gas and the ball's immediate cooling. It was a remarkable experience of witnessing an underwater volcano with the erupting lava and its immediate cooling to form a solid material.

When there is no air resistance, objects of different masses dropped from rest?