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
baherus [9]
3 years ago
14

If you lift two loads up one story, how much work do you do compared to lifting just one load up one story?

Physics
1 answer:
Daniel [21]3 years ago
6 0

Answer:a

Explanation:

We have to lift the load two loads up one story, so energy required is

let m be the mass of each load and h is the height of each story

Energy E_1=2\times m\times g\times \h

E_1=2mgh

Here energy gained is the potential energy which depends upon the datum(floor).

For lifting one load up one story

Energy required

E_2=mgh

thus E_2 is half of E_1

So option a is correct                                

You might be interested in
  do batteries produce or make energy
melamori03 [73]
Batteries Produce energy
3 0
3 years ago
Read 2 more answers
The frequency of a wave is tripled, while the wave speed is held constant. What happens to the wavelength?
grigory [225]
The wavelength decreases
6 0
3 years ago
Read 2 more answers
Approximately what core temperature is required before hydrogen fusion can begin in a star?
valkas [14]

Answer:

The temperature required is near about 3 million kelvin

Explanation:

The brilliance of the star results from the nuclear reaction that take place in the core of the star and radiate a huge amount of thermal energy resulting from the fusion of hydrogen into helium.

For this reaction to take place, the temperature of the star's core must be near about 3 million kelvin.

The hydrogen atoms collide and starts and the energy from the collision results in the heating of the gas cloud. As the temperature comes to near about 1.5\times 10^{7 {\circ}C, the nuclear fusion reaction takes place in the core of the gas cloud.

The huge amount of thermal energy from the nuclear reaction gives the gas cloud a brilliance resulting in a protostar.

8 0
3 years ago
A uniform electric field exists in the region between two oppositely charged plane-parallel plates. An electron is released from
Zigmanuir [339]

Answer:

Explanation:

  • given S = distance from the first = 3.20cm = 0.032m, t = 1.30×10−8 s
  • q = 1.6 x 10_19C
  • using S = at^2/2
  • acceleration = 0.032 X 2 /(1.30×10−8)^2

a = 3.79 x 10^14m/s^2

  • From F = ma
  • F = qE
  • ma = qE

E = ma /q = 9.11 x 10^-31 x 3.79 x 10^14 / 1.6 x 10^-19

E = magnitude of this electric field. = 2156.3N/C

b) Find the speed of the electron when it strikes the second plate ; V^2 = 2as

= 2 X 3.79 x 10^14 X 0.032

= 4.92 X 10^6m/s

5 0
2 years ago
What was the main aim behind Wegener's continental drift theory?
Aleks [24]
D.all of the above is the answer for this question
8 0
3 years ago
Other questions:
  • As you increase the number of supporting strings, what happens to the force needed to lift the bottom block
    11·1 answer
  • What do significant figures in a measurement include___________________________________.
    7·1 answer
  • The outer layer of bone _____.
    14·1 answer
  • A 2,200 kg car moving at 18 m/s hits a barrier and comes to a stop. How much work is done to bring the car to a stop?3.6 x 105J3
    11·1 answer
  • Copper wire of diameter 0.289 cm is used to connect a set of appliances at 120 V, which draw 1850 W of power total. The resistiv
    5·1 answer
  • .If Nellie Newton pushes an object with twice the force for twice the distance, she does
    12·1 answer
  • At what distance x from the center of the coil, on the axis of the coil, is the magnetic field half its value at the center?
    5·1 answer
  • Can something move horizontally and vertically at the same time? Yes! Why? No! Why not?
    6·2 answers
  • I need help, Will mark branliest!
    5·2 answers
  • Select all that apply.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!