Other Engineering Answers

At what height above the ground does the weight of a body decrease to 0.8 its original weight?

Write the Assembly Code for PIC16F84A microcontroller to read a switch connected to Bit 2 of PORTB. You will need to first set the pin to an input, then test whether the pin is 0 ( switch closed, if so go to existing program at label SWITCH. If not the program is to continue: Add comments to each line to explain what the code does.

(S∪T)∘R= (S∘R)∪(T∘R)

It is required to prepare 1250 kg of a solution composed of 12 wt.% ethanol and 

88 wt.% water. Two solutions are available, the first contains 5 wt.% ethanol, and the second 

contains 25 wt.% ethanol. How much of each solution are mixed to prepare the desired 

solution?

Solve the recurrence relation

a_n+3a_n-1+3a_n-2+a_n-3=0

Solve a⁰=1,a¹=-2,a²=-1

The magnetic declination in a locality is 4°07’W. Given

geographic bearing AB, DUE WEST, determine the:

a)true bearing reckoned from south

b)magnetic azimuth reckoned from north

The magnetic declination in a locality is 3°19’W. Given true

bearing AB, N35°25’E, determine the:

a)magnetic bearing reckoned from north

b)magnetic azimuth reckoned from south

The magnetic declination in a locality is 4°07’W. Given

geographic bearing AB, S52°04’E, determine the:

a)true bearing reckoned from south

b)magnetic azimuth reckoned from north

The magnetic declination in a locality is 5°47’E. Given

magnetic bearing AB, N45°27’E, determine the:

a)true bearing reckoned from north

b)true azimuth reckoned from south

Design a system which determines the speed depending ambient temperature. Display should show current temperature and fan speed. Speed Measurement Unit

(Digital 1): This unit tracks the speed of the fan. • Measure the motor speed speed (rpm) using appropriate external sensors.

• Display the speed and temperature using multiplexed Seven Segment Display (SSDs). The temperature should be obtained from the Speed Reference unit.

(Digital 2): This unit will determine the speed of the motor.

• Measure the ambient temperature and determine the whether the fan should spin at high(220v),medium (150v) or low speed high (80v). Send an analogue signal for the speed to the Motor Driver unit. 220, 150 and 80 volts are recommended levels.

• Allow the user to set the temperature bounds digitally for the speed settings.

•Send the current temperature value to the Speed Measurement unit.