Which formula correctly shows how to calculat the time taken, given the average velocity and the displacement

Answers

Answer 1

Answer: We're so good here on Brainly, we can answer it
even WITHOUT seeing the choices.

Time = (displacement) / (magnitude of average velocity) .

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Calculate the accleration of a 25-Kg object that moved with force of 300 N

Answers

F=ma
a=F/m=300/25=12 m/s^2

Please answer !!!A company wants to install a sensor to monitor the light level in the offices of their buildings. The sensor contains an LDR which has a resistance of 10kohlms in daylight and 100kohlms in the dark . The choice of resistor in the circuit is between one of 25kohlms and 1 megaohlm. The input p.d to the sensing circuit of 12 v . State and explain which resistor is the best choice for the circuit in light and dark which each of the resistors . You could put your calculations in a table .

Answers

Answer:

Explanation:

The sensor contains an LDR which has a resistance of 10kohlms in daylight and 100kohlms in the dark.

If the resistor in the circuit is 1 megaohlm, the total resistance in daylight and darkness will be 1.01 megaohms and 1.1 megaohlms.

The percentage difference = (1.1-1.01)/1.1*100% = 8.18%

If the resistor in the circuit is 25 kohlm, the total resistance in daylight and darkness will be 35 kohms and 125 kohlms.

The percentage difference = (125-35)/125*100% = 72%

With the input p.d to the sensing circuit fixed at 12 v, the sensing current will change according to the total resistance. A 72% difference is much more detectable. So the 25 kohm resistor is the better choice.

Answer:

Explanation:

V=IR

I=12/(R of resistor + R of LDR)

R of LDR = 10kohm in light and = 100kohm in dark

R1 = 25kohm

R2 = 1Mohm

solve 4 current

light dark

R1 12/(25+10)=0.343mA 12/(25+100)=0.096mA

R2 12/(1000+10)=0.012mA 12/(1000+100)=0.011mA

so R1 is better as its easier 2 tell its light or dark

What is the force required to produce an acceleration of 46.4

Answers

That depends on the mass of the object, and the unit of the '46.4' .

If the '46.4' is ' meters per second² ' , then the force required is

(mass of the object in kilograms) x (46.4) newtons .

What does the measurement 6.5 V represent? A. Electric field B. Electric potential C. Electric potential energy D. Electric force

Answers

Option B. Electric potential.

V means volts and is the unit defined for the electric potential or voltage.

Answer:

B. Electric potential

Explanation:

Index fossils are the remains of species that were once abundant and

Answers

The question is asking to complete the sentence: index fossils are the remains of species that were once abundant and (...). Index fossils are used to be able to see that a certain layer of soil was from a particular period of time. This means that they could not have lived long - just for a short period in the geological history. Typically, index fossils were also geographically widespread, but it's not always the case

Answer:

Geographically Widespread

How far can a bus travel in 8 h at an average speed of 60 mph?

Answers

Answer:

480 mph

Explanation:

speed = 60 mph

time = 8 hours

distance = speed*time

= 60*8

= 480 mph

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