1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
KengaRu [80]
3 years ago
13

If 68 W of power is produced in 18 seconds, how much work is done?

Physics
1 answer:
spayn [35]3 years ago
4 0

Answer: 1224 joules

Explanation:

Given variables are:

Power (p) = 68 W

Time taken (t) = 18 seconds

work done (w) = ?

Recall that power is the rate of work done per unit time i.e Power is obtained by dividing the work done by the time taken.

Hence, Power = work / time

Make work the subject formula

work = power x time

work = 68 watts x 18 seconds

work = 1224 joules

Thus, 1224 joules of work is done.

You might be interested in
Net force of 8.0 N acts on an 18 kg body for one minute. Determine the impulse due to the force.
boyakko [2]

Answer:

p = FΔt = 8.0 N(60 s) = 480 N•s

Explanation:

not asked for, but in that time a frictionless 18 kg mass on a horizontal surface will have change velocity by 480/18 = 26.7 m/s.

An impulse results in a change of momentum.

3 0
3 years ago
On a summer afternoon, the sand on the beach can get very hot. When you step on the sand in bare feet, you can burn yourself.
8_murik_8 [283]
<span>Heat from the Sun is transferred to the sand without direct contact. This heat is then transferred to your feet by direct contact.</span>
8 0
2 years ago
Read 2 more answers
Perpendicular slope to 3x-y=4
Mashcka [7]
Perpendicular slope would be 1/3. so the equation will be Y=1/3x -4

4 0
2 years ago
What is the unique geological feature found on Mercury surface?
Cloud [144]

Answer:

The surface of Mercury has landforms that indicate its crust may have contracted. They are long, sinuous cliffs called lobate scarps. These scarps appear to be the surface expression of thrust faults, where the crust is broken along an inclined plane and pushed upward.

Explanation:

I hope this helps a little bit.

3 0
3 years ago
An automobile engine can produce 153 N · m of torque. Calculate the angular acceleration (in rad/s^2) produced if 85.2% of this
galina1969 [7]

Answer:

46.2 rad/s2

Explanation:

Angular acceleration works very similar to linear acceleration, it follows this equation:

\gamma = \frac{Mt}{J}

Where:

γ: angular acceleration

Mt: torque

J: moment of inertia of the load from its turning axis

Since we have the torque we just need the moment of inertia. We have to add together the moments of the drive shaft, tires, wheel walls and wheels.

The wheels act like disks. For disks the moment of inertia is:

J = \frac{1}{2} * m * r^2

Jwheel = \frac{1}{2} = 15 * 0.18^2 = 0.243 kg*m^2

The wheel walls act like annular rings, for these the moment of inertia is:

J = \frac{1}{2} * m * (re^2 - ri^2)

Jwall = \frac{1}{2} * 2 * (0.32^2 - 0.18^2) = 0.07 kg * m^2

The tread acts like a hoop, as in mass concentrated into a circunference, for these:

J = m * r^2

Jtread = 10 * 0.33^2 = 1.09 kg*m^2

The axle acts like a rod, which is the same as the disk:

Jaxle = \frac{1}{2} * 14.1 * 0.02^2 = 0.0028 kg*m^2

The drive shaft acts like a rod too:

Jshaft = \frac{1}{2} * 31.7 * 0.032^2 = 0.016 kg*m^2

SO, the total moment of inertia is:

J = 2*Jwheel + 2*Jwall + 2*Jtread + Jaxle + Jshaft

J = 2*0.243 + 2*0.07 + 2*1.09 + 0.0028 + 0.016 = 2.82 kg*m2

Finally the angular acceleration is:

\gamma = \frac{0.852 * 153}{2.82} = 46.2 \frac{rad}{s^2}

4 0
3 years ago
Other questions:
  • A vertical spring stretches 4.4 cm when a 16-g object is hung from it. the object is replaced with a block of mass 22 g that osc
    8·1 answer
  • 99 POINT QUESTION PLUS BRAINLIEST!!!
    8·2 answers
  • A helicopter carrying supplies is traveling eastward, 80.0 m off the ground, at a speed of 40.0 m/s. The supplies are to be drop
    12·1 answer
  • True or false. Students with a Learners License may not receive a motorcycle endorsement.
    7·1 answer
  • If a ball starts with the velocity of 2.0m/s and accelerates with a constant rate of 0.50m/s squared for 2.5s what is the balls
    12·1 answer
  • How is circular motion different from variable motion?
    9·1 answer
  • The distance around the block is equal to 3000 feet, how many blocks would you have to run to run a total of a mile?
    5·1 answer
  • I can fly but have no wings. I can cry but I have no eyes. Wherever I go, darkness follows me. What am I?
    12·2 answers
  • Which statement best describes the two reactions?
    8·2 answers
  • Using your knowledge of momentum explain why cars are designed to have crumple zones?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!