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
Romashka-Z-Leto [24]
3 years ago
14

A construction worker runs a jack hammer for 1.5 hours. The jack hammer has 2.4 kilowatts of power. How much electrical energy d

oes the construction worker use running the jack hammer?
A. 3.6 kilowatt-hours

B. 3600 kilowatt-hours

C. 0.625 kilowatt-hours

D. 1.6 kilowatt-hours
Physics
1 answer:
scoray [572]3 years ago
8 0
Its a because 24*15 is 360 but you have to put the decimal back so its 3.6 kilowats per hour plz mark brainlest 
You might be interested in
A mass of 148g stretches a spring 6cm. The mass is set in motion from its equlibrium position with a downward velocity of 10cm/s
zalisa [80]

Answer:

u(t)=0.78sin12.78t

Explanation:

We are given that

Mass,m=148 g

Length,L=6 cm

Velocity,u'(0)=10 cm/s

We have to find the position u of the mass at any time t

We know that

\omega_0=\sqrt{\frac{g}{L}}=\sqrt{\frac{980}{6}}=12.78 rad/s

Where g=980 cm/s^2

u(t)=Acos12.78 t+Bsin 12.78t

u(0)=0

Substitute the value

A=0

u'(t)=-12.78Asin12.78t+12.78 Bcos12.78 t

Substitute u'(0)=10

12.78B=10

B=\frac{10}{12.78}=0.78

Substitute the values

u(t)=0.78sin12.78t

7 0
3 years ago
With an average surface temperature of about 737 K, _______ is the hottest planet.
givi [52]
With an average surface temperature of about 737 K, Venus is the hottest planet.

While Mercury is closest to the sun, it has gaseous molecules that protect it. Venus is the second closest planet to the sun, and is the hottest planet.
3 0
3 years ago
Read 2 more answers
Which vector best represents the net force acting on the +3 C charge
adelina 88 [10]
Vector ' W ' best and there ya go
7 0
3 years ago
Explain what happens to the particles in a substance during a physical change.
Bingel [31]
During Physical Change there would be a re-arrangements of atoms or molecules, changes of the arrangement may be change in the distance between atoms or molecules, change in the crystal form, .....etc 

for example: water when heated it undergoes a Physical Change and turn into vapor, this means the heat cause the distance between water molecules to increase, so it transferred from the liquid form to the gas form. 

NOTE that in Physical Change there is no change in the chemical structure and the material retains all its chemical properties, and no new compounds are produced. 

again, A physical change is any change not involving a change in the substance's chemical identity. Matter undergoes chemical change when the composition of the substances changes: one or more substances combine or break up (as in a relationship) to form new substances.Physical changes occur when objects undergo a change that does not change their chemical nature. A physical change involves a change in physical properties. Physical properties can be observed without changing the type of matter. Examples of physical properties include: texture, shape, size, color, odor, volume, mass, weight, and density. 

BUT in Chemical Change ( or Chemical Reaction ) there would be change in the chemical nature of the material undergoing a Chemical Change with the production of new compounds.
5 0
3 years ago
Read 2 more answers
A 2.0kg mass is attached to a horizontal spring having a spring constant of 0.05Nm.
Alex Ar [27]

Good.  You can do some very interesting experiments with that equipment.

3 0
3 years ago
Other questions:
  • What is the name of the upward force that enables a bird to fly?
    5·1 answer
  • When calculating power what two pieces of information are needed?
    5·1 answer
  • If the gravitational forces exist between all objects in the universe why aren't people affected by the gravitational force exer
    9·1 answer
  • Deb drives 120 miles in 2 hours. What is her average speed
    12·1 answer
  • In a position-time graph what does it mean when you return to 0? ASAP HELP PLEASE!
    11·1 answer
  • According to its periodic table entry, how many electrons does nickel have in its valence level?
    6·2 answers
  • HELP PLEASE. WILL GIVE BRAINLIEST!!!
    12·2 answers
  • Se tienen 500g de alcohol etílico a una temperatura de -40 °C ¿Cuánto calor se necesita para transformarlo a vapor a una tempera
    7·1 answer
  • 1. Weather factors include
    13·1 answer
  • A rock is thrown downward from the top of a 36.2-m-tall tower with an initial speed of 13 m/s. Assuming negligible air resistanc
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!