2 years ago

A high-speed boat has four 325.0 kW motors. How much work is done in 25 seconds by the motors?

Physics

1 answer:

olga nikolaevna [1]2 years ago

5 0

Answer:

Option D

Explanation:

Power is given by as work done per unit time and expressed as

P=W/t

Where W is work done, t is time and P is power.

Making W the subject of formula then

W=Pt

Substituting P by 4*325000 since they are four motors and taking 25 s dor t

W=4*325000*24=32,500,000 J

This is equivalent to 32.5 MJ hence option D is correct

You might be interested in

the angular speed of an automobile engine is increased at a constant rate from 1300rev/min to 2000rev/min in 3s (a) what is its

GalinKa [24]

Answer:

please find attached pdf

Explanation:

Download pdf

8 0

2 years ago

A frictionless pendulum is made with a bob of mass 19.7 kg. The bob is held at height = 0.934 meter above the bottom of its traj

Alika [10]

Answer:

265 J

Explanation:

$Energy=PE+KE=mgh+ 0.5mv^{2}$ where KE is kinetic energy, PE is potential energy, m is the mass of an object, v is the speed, h is the height and g is acceleration due to gravity.

Substituting 19.7 Kg for mass, 0.934 for h, 2.93 for v and 9.81 for g then

$Energy=19.7(9.81*0.934+0.5*2.93^{2})=265.063303\approx 265 J$

4 0

2 years ago

A reaction where the consequences of a reaction cause a succeeding like reaction is called a mass reaction .

Mumz [18]

Answer:

not 100% sure what you were asking.

Explanation:

A reaction where the consequences of a reaction cause a succeeding like reaction is called a <u>chain reaction</u>.

3 0

2 years ago

A person rides a bike with a constant velocity of 2 m/s. If his total displacement is 10 meters, for how long was he riding?

TEA [102]

Answer:

Explanation:

i just know

3 0

2 years ago

Geologists have divided rocks into three different categories based on ______

luda_lava [24]

How they are formed

3 0

2 years ago