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
timofeeve [1]
3 years ago
12

If the work required to speed up a car from 11 km/h to 21 km/h is 6.0×103 J , what would be the work required to increase the ca

r’s speed from 21 km/h to 33 km/h
Physics
1 answer:
goblinko [34]3 years ago
6 0

Explanation:

We need convert the velocities first to m/s and we get the following:

v2 = 21 km/hr = 5.8 m/s

v1 = 11 km/hr = 3.1 m/s

We need to find the mass of the car also for later use do using the work-energy theorem:

delta \: w =  \frac{1}{2} m(v \frac{2}{2}  - v\frac{2}{1} )

6.0x10^3 J = (0.5) m [(5.8)^2 - (3.1)^2]

or

m = 499.4 kg

Now we determine work needed delta W to change its velocity from 21 km/hr to 33 km/hr

v2 = 33 km/hr = 9.2 m/s

v1 = 21 km/hr = 5.8 m/s

delta W = (0.5)(499.4)[(9.2)^2 - (5.8)^2]

= 1.3 x 10^4 J

You might be interested in
A particular molecule has a small molecular mass of approximately 1000 daltons. What should be done to make this molecule more a
barxatty [35]

Answer:

Bind it to a large protein

Explanation:

An antigen is a molecule that binds to Ag-specific receptors, but cannot necessarily induce an immune response in the body by itself. Antigens are proteins , peptides (amino acid chains) and

polysaccharides (chains of monosaccharides/simple sugars) but

lipids and nucleic acids become antigens only when combined with proteins and polysaccharides. [4] In general, saccharides and lipids (as opposed to peptides) qualify as antigens but not as immunogens since they cannot elicit an immune response on their own. Furthermore, for a peptide to induce an immune response it must be a large enough size, thus binding to proteins

7 0
3 years ago
Heeeelllllllpppp I need this right now
dem82 [27]
Static friction

hope this helps
7 0
3 years ago
Read 2 more answers
Which statement(s) accurately describe the conditions immediately before and after the firecracker explodes:
lidiya [134]

Answer:

Option C, The total momentum of the fragments is equal to the original momentum of the firecracker.

Explanation:

Kinetic energy of cracker cannot remain constant before and after explosion. It is so because in the process of burning and bursting some amount of kinetic energy is lost in the form of light and heat energy. While the total mass before and after the explosion remains constant due to which the momentum is conserved before and after the explosion

Hence, option C is correct

8 0
3 years ago
How an electric car might still run on fossil fuel
pantera1 [17]

Answer:

Below

Explanation:

Incredible amounts of fossil fuels are used to mine for materials, buil and transport electric vehicles

Electric vehicles use electricity to charge their batteries.  Most electricity is generated using fossil fuels such as natural gas and coal .    

8 0
1 year ago
Que propiedad de la Luz se produce cuando ves tu cara reflejada en la cuchara?
kramer

Answer:

refracción

Explanation:

I don't speak spanish but that's the answer

5 0
3 years ago
Other questions:
  • A car moving in a straight line starts at x=0 at t=0. it passes the point x=25.0m with a speed of 11.0m/s at t=3.0s. it passesth
    7·1 answer
  • Does the surrounding air become warm or cool when vapour phase of h2o condenses?explain.
    7·1 answer
  • If 2000 kg cannon fires 2 kg projectile having muzzle velocity 200 m/s than the recoil speed of the cannon will be *
    5·1 answer
  • a rocket with a lift of mass 20 000kg is blasted upwards with an initial acceleration of 5.0m/s². calculate the initial thurst(f
    6·1 answer
  • Why don't ring particles form a moon? a. They collide too violently to accrete into a moon. b. Tidal forces from moons prevent t
    14·1 answer
  • PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
    15·1 answer
  • Temporary magnets are made up of _______.​
    6·2 answers
  • A 100g object begins falling from a height of 5 meters. If g, the acceleration of gravity, is 10 m/s2, how long do you calculate
    5·1 answer
  • Can a 12 inch rubber band fit a 22 pound rubber band ball
    12·1 answer
  • A 3m plank AB of mass 20kg has a center of gravity 2m from end A and rests on supports R1 and R2 both 0,5m from either end. It a
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!