Force and Distance are Required to calculate which of the following

Answers

Answer 1

Answer: Work is the answer to this question

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A 600-N box is pushed up a ramp that is 2 meters high and 5 meters long. The person exerts a force of 300-N. What is the efficiency of the ramp?

Answers

From information given, there are two forces in action, the vertical and the horizontal. We first need to calculate separately work done by these two forces, then determine the efficiency.Work = Force × distancework(a) → 600N × 2m = 1,200 Nmwork(b) → 300N × 5m = 1,500 NmEfficiency = work(a) / work (b) × 100Efficiency = 1200 / 1500 × 100Efficiency = 0.8 × 100Efficiency = 80%Therefore the efficiency of the ramp is 80%

In a nuclear reactor, the moderator is: usually made of graphite placed between the fuel rods used to slow down neutrons all of the above none of the above

Answers

The correct answer is all of the above. In a nuclear reactor, the moderator is usually made of graphite, placed between the fuel rods, and used to slow down neutrons. The nuclear moderator is a medium in which reduces the speed of the fast neutrons.

The answer is D. All the above

Which type of tape is used to round sharp edges on splices using larger conductors?a. Friction tape
b. Rubber tape
c. Cotton tape
d. Plastic tape

Answers

Rubber tape is used to round sharp edges

Answer:

Explanation:

the answer is rubber tape not friction tape

A stone is dropped from a cliff. What will be its speed when it was fallen 100 m?

Answers

Answer:

final velocity will be44.72m/s

Explanation:

HEIGHT=h=100m

vi=0m/s

vf=?

g=10m/s²

by using third equation of motion for bodies under gravity

2gh=(vf)²-(vi)²

evaluating the formula

2(10m/s²)(100m)=vf²-(0m/s)²

2000m²/s²=vf²

√2000m²/s²=√vf²

44.72m/s=vf

Answer:

44.2m/s

Explanation:

2gs = vf*2 - vi*2

2 x 9.8 x 100 = vf*2 - 0

1960 = vf*2

vf = 44.2 m/s

Average amount of time wind machines operate

Answers

The wind machine on an average operates for a time of about $\boxed{3-4\text{ hours}}$ .

Explanation:

The wind energy is the method of using the energy carried by the wind to generate the power. The wind energy is the considered as the conventional and clean source of energy.

The wind machines require the high power winds to rotate the blades of the windmill and produce power using the energy of the moving wind.

The winds blow at such high speed for a very small time during the day, the wind machine cannot be expected to work for a longer time during the whole day.

The wind energy can be obtained form a wind mill for a limited time unlike the other form of energy like thermal energy or even the solar energy. The thermal energy can be obtained at anytime due to burning of fuel whereas the solar energy can at least be obtained during the whole day time.

Thus, the wind machine on an average operates for a time of about $\boxed{3-4\text{ hours}}$ .

Learn More:

1. Acceleration of the box under friction brainly.com/question/7031524

2. The kinetic energy of an object depends on the brainly.com/question/137098

3. The approximate time taken to walk for 2000 miles brainly.com/question/3785992

Answer Details:

Grade: Middle School

Subject: Physics

Chapter: Energy

Keywords:

wind energy, conventional source, energy, thermal, solar, 3-4 hours, high speed, machine, time, operate.

In a video game, a flying coconut moves at a constant velocity of 20 meters/second in the positive direction. The coconut hits an obstacle and moves in the opposite direction with a constant velocity of 10 meters/second. What’s the change in velocity of the coconut?

Answers

Answer:

30 negative is the change in velocty

Explanation:

Answer:-30 m/s

Explanation:

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Millikan measured the electron's charge by observing tiny charged oil drops in an electric field. Each drop had a charge imbalance of only a few electrons. The strength of the electric field was adjusted so that the electric and gravitational forces on a drop would balance and the drop would be suspended in air. In this way the charge on the drop could be calculated. The charge was always found to be a small multiple of 1.60 × 10-19 C. Find the charge on an oil drop weighing 1.00 × 10-14 N and suspended in a downward field of magnitude 2.08 × 104 N/C.

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