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
Kamila [148]
3 years ago
10

A piano with a mass of 130 kg is lifted 10m above the ground in 5 s by a crane.

Physics
2 answers:
hammer [34]3 years ago
7 0
The 2548 watts should be the power that is used by the crane according to the formula
Sergio [31]3 years ago
6 0

<em>power = 2548 \: watt \\ solution \\ mass = 130 \: kg \\ distance = 10m \\ time = 5 \: sec \\ power =  \frac{w}{t}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \frac{f \times d}{t}  \\  \:  \:  \:  \:  \:  \:  \:  \:  =  \:  \frac{m \times g \times d}{t}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \frac{130 \times 9.8  \times 10}{5}  \\  \:  \:  \:  \:  \:  \:  \:  \:  =  \frac{12740}{5}  \\  \:  \:  \:  \:  \:  = 2548 \: watt \\ hope \: it \: helps</em>

You might be interested in
Study the four transverse waves shown. Compare the properties of waves B, C, &amp; D to that of wave A.
GalinKa [24]
Wave D has the same wavelength as wave A, but the amplitude is lower. The answer is Wave D.
7 0
3 years ago
According to Newton's law of cooling, the rate at which an object's temperature changes is directly proportional to the differen
Kryger [21]

Answer:

dT(t)/dt = k[T5 - T(t)]

Explanation:

Since T(t) represents the temperature of the object and T5 represents the temperature of the surroundings, according to Newton's law of cooling, the rate at which an object's temperature changes is directly proportional to the difference in temperature between the object and the surrounding medium, that is dT(t)/dt ∝ T5 - T(t)

Introducing the constant of proportionality

dT(t)/dt = k[T5 - T(t)]

which is the desired differential equation

4 0
2 years ago
Read 2 more answers
The brakes exert a 1,951 N force on a car weighing 18,985 N and moving at 12 m/s. The car finally stops. How long (in seconds) d
nata0808 [166]

Answer:20,000

Explanation:

7 0
3 years ago
g Calculate the maximum wavelength of light that will cause the photoelectric effect for potassium. Potassium has work function
Ivahew [28]

Answer:

λ = 5.4196 10⁻⁷m,  λ = 541.96 nm    this is green ligh

Explanation:

The photoelectric effect was explained by Eintein assuming that the light was made up of particles called photons and these collided with the electrons taking them out of the material.

 

                     K = h f -Ф

where K is the kinetic energy of the ejected electrons, hf is the energy of the light quanta and fi is the work function of the material.

The speed of light is related to wavelength and frequency

                   c = λ / f

                  f = c /λ

we substitute

                K = h c / λ - Φ

for the case that they ask us the kinetic energy of the electons is zero (K = 0)

                 h c / λ = Ф

                λ = h c / Ф

we calculate

                 λ = 6.63 10⁻³⁴  3 10⁸ / 3.67 10⁻¹⁸

                 λ = 5.4196 10⁻⁷m

let's take nm

                lam = 541.96 nm

this is green light

4 0
3 years ago
A ball that is thrown upwards from the ground will eventually reach its highest point and fall back to the ground. Which of the
tia_tia [17]

Answer:

option (c)

Explanation:

When an object thrown upwards, the value of acceleration acting on the object is acceleration due to gravity which is always acting towards the earth.

As it falls downwards, the acceleration is again equal to the acceleration due to gravity.

So, the ball's acceleration is constant.

5 0
3 years ago
Other questions:
  • In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallw
    14·1 answer
  • The specific heat of water is 4190 j/(kg*k). suppose you put 1 kg of water (a bit over 4 cups) into a microwave that can deliver
    10·1 answer
  • Label the producers and consumers, then label the different types of consumers.
    10·1 answer
  • What’s a good hypothesis and and experiment for water?
    11·1 answer
  • What do we call the tide that occurs when constructive interference between lunar and solar bulges produces a large tidal range?
    8·1 answer
  • Albert views Henry moving by at a constant velocity. Henry has a light clock and also a stopwatch which were synchronized when a
    11·1 answer
  • The landing of a spacecraft is cushioned with the help of airbags. During its landing on Mars, the velocity of downward fall is
    13·2 answers
  • As your hand moves back and forth to generate longitudinal pulses in a spiral spring, your hand completes 3.19 back-and-forth cy
    15·1 answer
  • Calculate the pressure exerted on the floor when an elephant who weighs 6000 N stands on one foot which has an area of 20 m2
    6·1 answer
  • A man walks 30 m to the west, then 5 m to the east in 45 seconds.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!