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3 years ago

8

Sally is training for the 1,000-meter running race at her school. Her goal is to place third or better. How can Sally determine

if she is making progress toward her goal?

1 answer:

BabaBlast [244]3 years ago

8 0

She can monitor her practice run times to see if they are decreasing.

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Assume a 4.094 mhz clock is used as the system clock and the systick selects it as the clock. What should the systick_load regis

Anarel [89]

The load value for interrupts every one milliseconds is

$\begin{aligned}&\mathrm{val}=1 \times 10^{-3} \times 4.094 \times 10^6 \\&\Rightarrow \mathrm{val}=4094\end{aligned}$

The load value for interrupts every millisecond is

$\begin{aligned}&\mathrm{val}=1 \times 10^{-6} \times 4.094 \times 10^6 \\&\Rightarrow \mathrm{val}=4.094\end{aligned}$

However, we can only load integer values, therefore we apply

$\Rightarrow v a l \approx 4$

When the delay is 1 ms, it is accurate, but when the delay is 1 us, it is a little bit less. We are unable to provide an accurate 1 us delay interrupt because this requires a fractional value was calculated.

<h3>What does a SysTick timer do?</h3>

The systick timer has an auto reload and a 24-bit countdown timer.
An RTOS scheduler typically uses it to provide a periodic interrupt.
The Cortex-M CPU clock is used as the default clock source for the systick timer.

To learn about more tape timer, visit:

brainly.com/question/27798869

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8 0

2 years ago

Atmospheric pressure decreases with increment in height.<br> give reason

jekas [21]

Answer:

pressure=height × density×acc due to gravity

so

pressire is directly proportional to height hence it decreses with decrease in height

here air column height is measured upside down so decreases witn increment

7 0

3 years ago

Read 2 more answers

What force must be exerted on the master cylinder of a hydraulic lift to support the weight of a 2000-kg car (a large car) resti

Tema [17]

Explanation:

Below is an attachment containing the solution.

7 0

3 years ago

If the pressure of a gas sample is quadrupled and the absolute temperature is doubled. True or False

Vanyuwa [196]

The given statement"If the pressure of a gas sample is quadrupled and the absolute temperature is doubled" is false.

Answer: Option B

<u>Explanation:</u>

As we know the direct relationship between Pressure and Temperature by the Gay-Lussac’s Law,

$P_{1} T_{1}=P_{2} T_{2}$

From this, we get,

$\frac{P_{1}}{T_{2}}=\frac{P_{2}}{T_{1}}$

$T_{2}=\frac{P_{1} T_{1}}{P_{2}}$

So, according to given statement, we have $P_{2} = 4 P_{1}$

Then from the above expression, we can find out the value of $T_{2}$ when pressure increased by 4 times of initial pressure as,

$T_{2}=\frac{P_{1} T_{1}}{4 P_{1}}$

Hence, we get,

$T_{1}=4 T_{2}$

Hence, from the above expression we can say that as we increase the pressure four times, the temperature does not get doubled. So, the given statement in the question is false.

6 0

4 years ago

A series circuit contains a 100.0-Ω resistor, a 0.450-H inductor, a 0.360-µF capacitor, and a time-varying source of emf providi

eduard

Answer:

A) The resonance angular frequency in an L-R-C circuit is

$\omega_0 = \frac{1}{\sqrt{LC}} = \frac{1}{\sqrt{0.45\times0.36\times 10^{-6}}}\\\omega_0 = 2.48\times10^3 rad/s$

B) The current can be found by calculating the impedance of the system.

$Z = \sqrt{R^2 + (X_L - X_C)^2} = R$

Since $X_L = X_C$ at resonance.

So, $I = V/Z = V/R = 30 / 100 = 0.3A$

5 0

3 years ago