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
Elina [12.6K]
3 years ago
7

17.

Physics
1 answer:
DaniilM [7]3 years ago
6 0

Answer:

t = 7 seconds

Explanation:

Given that,

The acceleration of a car, a = 4 m/s²

The initial velocity of the car, u = 0

Final velocity of the car, v = 28 m/s

We need to find how much time the car to reach a speed of 28 m/s. Using the definition of the acceleration of a car. It is given by :

a=\dfrac{v-u}{t}\\\\t=\dfrac{v-u}{a}\\\\t=\dfrac{28}{4}\\\\t=7\ s

So, it will take 7 seconds to reach a speed of 28 m/s.

You might be interested in
D. If a dog has a mass of 12 kg, what is its weight on Neptune?<br> 11.7N/kg
steposvetlana [31]

Answer:

133.8 N

Explanation:

Recall that the acceleration of gravity in Neptune is estimated as 11.15 m/s^2

Therefore, the weight of the dog on this planet would be:

Weight = mass x acceleration of gravity = 12 kg x 11.15 m/s^2 = 133.8 N

4 0
3 years ago
A starter pistol is fired 150m away from the spectators who hear the gun 0.5s after they see it fired. How fast does sound trave
Natali [406]

Answer:

300m/s

Explanation:

speed = distance/time

150/0.5

8 0
3 years ago
What category of the electromagnetic spectrum has a wavepength of 108m​
vodomira [7]

Answer: Radio Waves

Explanation:

8 0
3 years ago
Is it possible for a gas contained in a chamber to maintain a constant temperature while heat is being added to the gas? Explain
Evgesh-ka [11]

Answer:Yes

Explanation:

Yes it is possible for a gas contained in a chamber to maintain a constant temperature while heat is being added to the gas.A process in which temperature of the gas remains constant is called Isothermal Process.For an ideal internal energy is a function of temperature therefore internal energy remains constant while all the heat added is converted to do the work done by the system.

6 0
3 years ago
A blue train of mass 50 kg moves at 4 m/s toward a green train of 30 kg initially at rest. What is the initial momentum of the g
soldi70 [24.7K]

Answer:

I think answer is zero

bcz momentum=mass×velocity

body was initially at rest it means its velocity is zero

30×0=0

6 0
3 years ago
Other questions:
  • A soccer player is running up field at 10 meters per second and comes to a stop in 3 seconds facing the same direction what is h
    11·1 answer
  • - The school zone in front of your school has a posted speed limit of 25 mi/h, which is about 11 m/s. Let's
    11·1 answer
  • An airplane flies at an altitude of 36,000 km and is traveling at a velocity of 300.0 km/h to the north, but the tailwind is 20.
    14·2 answers
  • The mechanical advantage of a wheel and axle is the radius of the wheel divided by the radius of the axle. On wheel and axle A,
    11·2 answers
  • What type of energy does a battery have?
    9·2 answers
  • A 100 g piece of aluminum is heated to 90°
    11·1 answer
  • • List four uses of the concave mirror.<br> State five uses of lenses in everyday activities
    13·1 answer
  • Descirbe what has happen to earths continents today
    15·1 answer
  • A ride at an amusement park attaches people to a bungee cord, pulls them
    8·1 answer
  • According to x-ray observations, the space between galaxies in a galaxy cluster is?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!