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omeli [17]
3 years ago
9

Scientists use tables and graphs to chart and analyze _________.

Physics
1 answer:
MissTica3 years ago
6 0

Explanation:

Tables and graphs are visual representations. They are used to organise information to show patterns and relationships. A graph shows this information by representing it as a shape. Researchers and scientists often use tables and graphs to report findings from their research.

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Running at maximum speed, it takes a boat times as long to go 10 miles upstream as it does to go 10 miles downstream. If the cur
Greeley [361]

Note: <em>The question states the time to go upstream is a number of times (not explicitly written) the time to go downstream. We'll assume a general number N</em>

Answer:

\displaystyle v_b=\frac{N+1}{N-1}(4\ mph)

Explanation:

<u>Relative Speed</u>

If a boat is going upstream against the water current, the true speed of motion is v_b-v_w, being v_b the speed of the boat and v_w the speed of the water. If the boat is going downstream, the true speed becomes v_b+v_w.

The question states the time to go upstream is a number of times N (not explicitly written) the time to go downstream. The speed of an object is computed as

\displaystyle v=\frac{x}{t}

Where x is the distance traveled and t the time taken for that. The time can be computed by

\displaystyle t=\frac{x}{v}

If t_u is the time for the upstream travel and t_d is the time for the downstream travel, then

t_u=Nt_d

Siince the same distance x= 10 miles is traveled in both cases:

\displaystyle \frac{10}{v_b-v_w}=N\frac{10}{v_b+v_w}

Simplifying and rearrangling

v_b+v_w=N(v_b-v_w)

Operating

v_b+v_w=Nv_b-Nv_w

Solving for v_b

\displaystyle v_b=\frac{N+1}{N-1}v_w

If\ N=2,\ v_w=4\ mph

\displaystyle v_b=\frac{3}{1}(4)=12\ mph

If N=3

\displaystyle v_b=\frac{4}{2}v_w=2(4)=8\ mph

We can use the required value of N to compute the speed of the boat as explained

7 0
3 years ago
The addition of electron shells results in _____
vodka [1.7K]

Answer:

shielding of electrons

Explanation:

The addition of electrons shells results in the shielding of electrons away from the nucleus, most importantly the nuclear pull resulting from the charge.

  • The nucleus pulls electrons to itself due to the net positive charge on it.
  • As more electronic shell is added, the effect of the pull weakens outward.
  • The inner shell experiences the nuclear pull more than the outer shell electrons.

The effect is responsible for a wide range of properties of elements.

6 0
3 years ago
A 1.5m wire carries a 4 A current when a potential difference of 63 V is applied. What is the resistance of the wire?
Korvikt [17]
Resistance = voltage / current
Resistance = 63 / 4
Resistance = 15.75 ohms
6 0
3 years ago
Please help.<br>Just True or False​
True [87]

Answer:

1. T

2. F

3.F

4.T

thank you

6 0
3 years ago
&gt;<br><br> Which activity will improve your muscle strength
BartSMP [9]

Answer:

  1. Lifting weights
  2. Strength training
  3. Resistance training
  4. Heavy gardening e.g digging , shovelling

Explanation:

8 0
3 years ago
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