Steve and Carl are driving from Scranton to Bridgeport, a distance of 180 miles. If their speed averages60 miles an hour, how long will it take them to get there?
A. 3.5 hours
B. 3 hours
C. 2.5 hours
D. 4 hours

Answers

Answer 1
Answer: The answer is B
every hour, Steve and Carl cover 60 miles
if they need to cover 180 miles it will take them 3 hours
you can set up a proportion
60/1=180x where x is the amount of hours Steve and Carl will drive to cover 180 miles.
proportion simplifies to this:
60x=180
isolate the varible
60x/60=180/60
x=3
Answer 2
Answer: the answer is B 3 hours

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Newton's Second Law of Motion is expressed as F = ma. A lawn mower is pushed over a length of grass. If the pushing force suddenly doubles what will happen to the lawn mower's rate of acceleration? The mass of the lawn mower is constant. A.The acceleration will double. B.The acceleration will decrease by half. C.The acceleration will remain constant. D.The acceleration will triple.

Answers

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Answer:

A) The acceleration will double

Explanation:

Given the expression according to Newton's second law F = ma where;

F is the force

m is the mass of the object

a is the acceleration

Let the initial force be F1 and acceleration be a1

F1 = ma1...(1)

If the pushing force suddenly doubles if the lawn mover is pushed over a length of grass, the new force F2 = 2F1 and acceleration of force F2 will be a2, since the mass doesn't change;

F2 = ma2

2F1 = ma2...(2)

Dividing equation 2 by 1, we will have;

2F1/F1 = ma2/ma1

2 = a2/a1

a2 = 2a1

This shows that the acceleration doubles if the pushing force doubles since force is directly proportional to the acceleration. Increase in the applied force will lead to equal increase in the acceleration and vice versa

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Answers

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Answers

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Calculate the average power required to lift a 490 Newton object of vertical distance of 2 m in 10 seconds

Answers

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So, when you lift it 2 meters vertically, the work you do is

             Work  =  (490 N) x (2 m)  =  980 joules
and
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Answers

Creating new elements in order to study their properties is definitely pure research.
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for the search.

A flashlight has a resistance of 2.4 what voltage is applied by the batteries if the current in the circuit is 2.5 a?

Answers

Explanation :

The resistance of the flashlight is 2.4 ohms

The current flowing in the circuit is 2.5 A

The Ohm's law gives the relation between the following quantities i.e.

Current

voltage

and resistance

Mathematically, Ohm's law can be written as :

V =I R

V=2.5\ A* 2.4\ \Omega

V=6\ Volts

The voltage applied by the batteries is 6 volts.

Hence, this is the required solution.

Answer:

D - 6.0

Explanation:

i'm not getting more detailed than the other answer so yeah i just took the test