A football has a mass of .43 kg and it accelerates

SAT

1 answer:

Jet001 [13]3 years ago

7 0

Answer:

10 m/s²

Explanation:

Near Earth's surface, gravitational acceleration is approximately 9.81 m/s2, which means that, ignoring the effects of air resistance, the speed of an object falling freely will increase by about 9.81 metres per second every second.

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This is a statement that leads to a contradictory situation in which something seems both true and false.

olganol [36]

Answer:

I don't know what to put up here but I hope this helped.

Explanation:

Metaphor This is a direct comparison of two things, in which they are said to be (in some sense) the same thing. Metonymy This is a figure of speech in which one word or phrase is substituted for another with which it is closely associated.

7 0

3 years ago

Read 2 more answers

Newton’s law of cooling states that for a cooling substance with initial temperature t0, the temperature t(t) after t minutes ca

antoniya [11.8K]

The cooling rate of the substance is approximately 0.0732.

According to the statement, the Newton's law of cooling is defined by the following formula:

$T(t) = T_{s} + (T_{o}-T_{s})\cdot e^{-k\cdot t}$ (1)

Where:

$T_{s}$ - Final temperature, in degrees Celsius.
$T_{o}$ - Initial temperature, in degrees Celsius.
$t$ - Time, in minutes.
$k$ - Cooling rate, in $\frac{1}{min}$ .
$T(t)$ - Current temperature, in degrees Celsius.

Please notice that substance reaches thermal equilibrium when $T(t) = T_{s}$ , that is when temperature of the substance is equal to the temperature of surrounding air.

If we know that $T_{o} = 80\,^{\circ}C$ , $t = 15\,min$ , $T_{s} = 50\,^{\circ}C$ and $T(15) = 60\,^{\circ}C$ , then the cooling rate of the substance is: