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3 years ago

Rob measures the solubility of three different salts in water at 22°C.

2 answers:

5 0

The correct answer for this question is this one: "B. line graph." Rob measures the solubility of three different salts in water at 22°C. The data can be best presented in a line graph.
Here are the following choices.
<span>A. bar graph
B. line graph
C. histogram
D. scatterplot</span>

Pani-rosa [81]3 years ago

3 0

The correct answer is "Bar Graph"

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A hot-air balloon is ascending at the rate of 12 m/s and is 80 m above the ground when a package is dropped over the side. (a) H

Debora [2.8K]

Answer:

Explanation:

Given

balloon is ascending at the rate of $u=12\ m/s$

Balloon is at a height of $s=80\ m$

As the package is dropped from the balloon it must possess the same initial velocity as the balloon

using

$v^2-u^2=2as$

where v=final velocity

u=initial velocity

a=acceleration

s=displacement

$v^2=12^2+2\times 9.8\times 80$

$v^2=1712$

$v=41.37\ m/s$

time taken is given by

$v=u+at$

substituting values

$41.37=-12+9.8\times t$

as we consider downward direction as positive

$t=\frac{53.37}{9.8}$

$t=5.44\ s$

therefore time taken to reach the bottom is t=5.44 s

6 0

3 years ago

A toddler pushes his 7.0 kg toy box at a relatively constant velocity across the tiled floor of the family room applying a horiz

xxMikexx [17]

Answer:The coefficient of friction between the box and the floor, = 1.456 × 10⁻²

Explanation:

8 0

3 years ago

A town is considering building a biodiesel power plant that would burn biomass to generate electricity. Which of the following c

garik1379 [7]

Answer:

i think its B

Explanation:

i found the answer on another website hope its the right answer :)

6 0

2 years ago

Read 2 more answers

A 1400 kg car is moving at 12 m/s when the driver stops a car what increase in the thermal energy of the car and it surroundings

butalik [34]

KE = 1/2 mv^2

in this case, the initial kinetic energy which is converted to heat is

KE = 1/2 1400 (12)^2

KE = 100,800 J

5 0

3 years ago

Read 2 more answers

An electric field of 1.32 kV/m and a magnetic field of 0.516 T act on a moving electron to produce no net force. If the fields a

Lapatulllka [165]

Answer:

The speed of the electron is $2.55\times 10^3\ m/s$ .

Explanation:

Given that,

The magnitude of electric field, $E=1.32\ kV/m=1.32\times 10^3\ V/m$

The magnitude of magnetic field, B = 0.516 T

Both the magnetic and electric fields are acting on the moving electron. Then, the magnitude of electric field and magnetic field is balanced such that :

$evB=eE\\\\v=\dfrac{E}{B}\\\\v=\dfrac{1.32\times 10^3}{0.516}\\\\v=2558.13\ m/s$

$v=2.55\times 10^3\ m/s$

So, the speed of the electron is $2.55\times 10^3\ m/s$ . Hence, this is the required solution.

3 0

3 years ago