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GaryK [48]
2 years ago
14

Which TWO statements about the substances in the experiment are true?

Physics
2 answers:
nataly862011 [7]2 years ago
4 0

Answer:

A and B are correct both are correct

iris [78.8K]2 years ago
4 0

Answer:

answer A and B

A. Quartz is harder than chalk.

B. Water has a higher surface tension than salty water.

Explanation:

did the test !

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Greg drew a diagram to compare two of the fundamental forces.
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Answer:

X: Always attractive

Y: Infinite range

Z: Attractive or repulsive

ANSWER IS C

8 0
3 years ago
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A motorcyclist heading east through a small town accelerate at constant 4.0meter per seconds square after he leaves the limits.
SVETLANKA909090 [29]

A) The position at t = 2.0 sec is 43.0 m east

B) The position is 55 m east

Explanation:

A)

In order to solve the problem, we take the east direction as positive direction.

We know that:

- at t = 0, the motorcyclist is at a position of x_0 = 5.0 m

- at t = 0, the initial velocity of the motorcyclist is v_0 = 15.0 m east

- The acceleration of the motorcyclist is constant and it is a=4.0 m/s^2

Since the motion is a uniformly accelerated motion, the position of the motorcylist is given by the expression

x(t)=x_0 + v_0t + \frac{1}{2}at^2

where t is the time.

Substituting t = 2.0 s, we find the position:

x(2.0)=(5.0)+(15)(2.0)+\frac{1}{2}(4.0)(2.0)^2=43 m

B)

The velocity of the motoryclist can be found by calculating the derivative of the position. Therefore, it is:

v(t)=x'(t)=v_0 + at

where:

v_0=15.0 m/s is the initial velocity

a=4.0 m/s^2 is the acceleration

We want to find the time t at which the velocity is

v = 25 m/s

Solving the equation for t,

t=\frac{v-v_0}{a}=\frac{25-15}{4}=2.5 s

And therefore, the position at t = 2.5 s is:

x(2.5s)=5.0+(15.0)(2.5)+\frac{1}{2}(4)(2.5)^2=55 m

Learn more about accelerated motion:

brainly.com/question/9527152

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3 0
3 years ago
Physic help????????????????
maxonik [38]

My personal understanding and opinion is that ALL of those questions
should be part of an assessment of Physical Activity Readiness.


4 0
3 years ago
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You are aboard the Amtrak Southwest Chief, travelling from Los Angeles to the Grand Canyon. Getting hungry, you decide to walk t
masya89 [10]

Answer:

An apple, potato, and onion all taste the same if you eat them with your nose plugged

Explanation:

4 0
2 years ago
A train takes 2h to reach station B from station A and 3h to return back to A.The distance between the station is 200km, then it
serg [7]

Answer:

80km/hr

Explanation:

Total distance: 400km

Total time 5 hours

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