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
iragen [17]
3 years ago
13

An electric hoist does 500 joules of work lifting a crate 2 meters. How

Physics
1 answer:
choli [55]3 years ago
8 0
Hope this answer helps
You might be interested in
A loaded barge has a mass of 1 500 000 kg and is traveling at 3 m/s. If a tugboat applies an opposing force of 12 000 N for 10 s
yan [13]

Answer:

Explanation:

Initial momentum is 1.5e6(3) = 4.5e6 kg•m/s

An impulse results in a change of momentum

The tug applied impulse is 12000(10) = 120000 N•s or 0.12e6 kg•m/s

The remaining momentum is 4.5e6 - 0.12e6 =  4.38e6 kg•m/s

The barge velocity is now 4.38e6 / 1.5e6 = 2.92 m/s

The tug applies 0.012e6 N•s of impulse each second.

The initial barge momentum will be zero in

t = 4.5e6 / 0.012e6 = 375 s or 6 minutes and 15 seconds

To stop the barge in one minute(60 s), the tug would have to apply

4.5e6 / 60 = 75000 N•s /s or 75 000 N

5 0
2 years ago
The rocket is fired vertically and tracked by the radar station shown. When θ reaches 66°, other corresponding measurements give
Flauer [41]

Answer:

velocity = 1527.52 ft/s

Acceleration = 80.13 ft/s²

Explanation:

We are given;

Radius of rotation; r = 32,700 ft

Radial acceleration; a_r = r¨ = 85 ft/s²

Angular velocity; ω = θ˙˙ = 0.019 rad/s

Also, angle θ reaches 66°

So, velocity of the rocket for the given position will be;

v = rθ˙˙/cos θ

so, v = 32700 × 0.019/ cos 66

v = 1527.52 ft/s

Acceleration is given by the formula ;

a = a_r/sinθ

For the given position,

a_r = r¨ - r(θ˙˙)²

Thus,

a = (r¨ - r(θ˙˙)²)/sinθ

Plugging in the relevant values, we obtain;

a = (85 - 32700(0.019)²)/sin66

a = (85 - 11.8047)/0.9135

a = 80.13 ft/s²

4 0
3 years ago
Where would you find an inclined plane in a fan
ivanzaharov [21]
The blades that spin around in the fan, because they are flat and produce work
8 0
3 years ago
Read 2 more answers
Which type of plate boundary or zone would be most likely to lead to above-ground volcanic activity?
Anna007 [38]

Answer:

Convergent plate boundary

Explanation:

The convergent plate boundary refers to the type of boundary where two plates move towards each other. Due to this type of motion, there forms a subduction zone, where the denser plate subducts below the lighter plate. This zone of subduction is commonly identified by the presence of a deep and narrow V-shaped depression which is commonly known as the oceanic trench.

When the subducting plate enters into the region of the asthenosphere, the rocks melt and mix with the magma. This magma is then pushed upward due to the force exerted by the convection current that forms in the mantle, and further reaches the over-riding plate and eventually give rise to the formation of volcanoes and volcanic/island arcs.

Thus, this type of plate boundary is responsible for the formation of above-ground volcanic activities.

6 0
2 years ago
The <br> of a wave is the density of the medium’s particles at the compression of the wave.
andrew11 [14]
<span>Amplitude is the correct answer. I hope this helps.</span>
6 0
3 years ago
Read 2 more answers
Other questions:
  • A small rubber ball is thrown at a heavier, larger basketball that is still. The small ball bounces off the basketball. Assume t
    5·2 answers
  • What are three ways synthetic polymers affect the environment?
    14·1 answer
  • How are the electric field lines around a positive charge affected when a second positive charge is near it? The field lines com
    12·2 answers
  • Why don't the planets move exactly along the ecliptic?
    12·1 answer
  • The displacement (in meters) of an object moving in a straight line is given by s=1+2t+1/4t^2^2, where t is measured in seconds.
    10·1 answer
  • An object weighs 10N in air and 70N in water .What is it's weight when immersed in a liquid of relative density 1.5?​
    13·1 answer
  • (SCIENCE) 22 POINTS AND CROWN ASAP
    6·1 answer
  • A 85 kg lineman tackles a 90 kg receiver. The receiver is running 5.8 m/s, and the lineman is moving 4.1 m/s, at a right angle t
    8·1 answer
  • When solving projectiles you will often get two possible times for solutions. Sometimes a time will be negative and can be rejec
    5·1 answer
  • what is the thickness of the central portion of a thin conveying lens can be determined very accurately by using (a) vernier cal
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!