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Marta_Voda [28]
3 years ago
8

A student forms the following hypothesis: If people eat white chocolate, then they will be happier. What is/are the problem(s) w

ith this hypothesis?
Physics
1 answer:
ale4655 [162]3 years ago
4 0
The student has no real facts, or data that states that people who eat white chocolate are happier. If the student wants to make his hypothesis true then he needs to do a test, to see if white chocolate makes people happier. :)
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A stone is dropped at t = 0. A second stone, with 6 times the mass of the first, is dropped from the same point at t = 59 ms. (a
xxTIMURxx [149]

Answer:y_{com}=0.707 m

v_{com}=3.713 m/s

Explanation:

Given

first stone mass is m

second stone mass is 6 m

distance traveled by  first stone in 430 ms

y_1=ut+\frac{at^2}{2}

y_1=0+\frac{g(0.43)^2}{2}

y_1=0.9069 m

Distance traveled by stone 2 in t=430-59=371 ms

y_2=ut+\frac{at^2}{2}

y_2=0+\frac{g(0.0.371)^2}{2}

y_2=0.674 m

velocity of first stone after t=0.43 s

v_1=u+at

v_1=0+9.8\times 0.43=4.214 m/s

velocity of second stone after t=0.371 s

v_2=u+at

v_2=0+9.8\times 0.371=3.63 m/s

Position of Center of mass of system

y=\frac{y_1m_1+y_2m_2}{m_1+m_2}

y=\frac{0.9069\times m+0.674\times 6m}{m+6m}

y=\frac{4.95m}{7m}=0.707 m

Velocity of COM

v_{com}=\frac{v_1m_1+v_2m_2}{m_1+m_2}

v_{com}=\frac{4.214\times m+3.63\times 6m}{m+6m}

v_{com}=3.713 m/s

6 0
4 years ago
Does plants have prokaryotic cells?
vova2212 [387]
No they have eukaryotic cells
7 0
3 years ago
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You throw a stone vertically upward with an initial speed of 6.4 m/s from a third-story office window.
Gwar [14]
-12 = 6.2*t - 4.9*t² → t = 2.32 sec (quadratic formula) 

<span>V = Vi -g*t = 6.2 - 9.8*2.32 = -16.5 m/s</span>
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3 years ago
Forces start and change the motion of an object. Question 1 options: True False
Vlad1618 [11]
I think it’s true I may be wrong tho
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3 years ago
Which of the following materials offer the least electrical resistance? Pure water, wood, salt water, glass
Vanyuwa [196]

Salt water offers the least electrical resistance.

<u>Explanation:</u>

Least electrical resistance indicates that any material which readily allows the electric current through itself, and shows more conductivity.

Here pure water doesn't contain any ions, so it is a bad conductor.

Wood and glass are also bad conductors of electricity.

Salt water contains ions, which conducts electricity which means it shows least electrical resistance.

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