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
gogolik [260]
3 years ago
8

A certain car can accelerate from rest to 70km/h in 7 seconds.Find the cars average acceleration

Physics
2 answers:
Vaselesa [24]3 years ago
7 0
First: we have to express the units of velocity in m/s
70 km/h=70 km/h(1000 m/km)(1h/3600 s)=19.4444....m/s=19.44 m/s

average acceleration= (final velocity -initial velocity)/ time
average acceleration=(19.44 m/s - 0 m/s)/7 s≈2.78 m/s²

Answer: the cars average acceleration would be: 2.78 m/s²
Setler [38]3 years ago
4 0
A= (70-0)/7
a=10 km/hr/sec

10 km/hr = 10 km*100 m/km/(1 hr*3=600 sec/hr)=25/9 m/sec
---------------------------------------------------------------------------------
a= 25/9 m/sec/sec

Hope this help, plz make brainly-est
You might be interested in
QUESTION 5
Fiesta28 [93]

Answer:

D) sudden and irresistible on sets of sleep during normal waking periods

Explanation:

D because Narcolepsy (sudden and irresistible on sets of sleep during normal waking periods) is a part of insomnia

8 0
3 years ago
What two things can happen in the life of a massive star after it passes from the supernova stage?
kupik [55]
Medium stars become dwarf stars, large stars become either neutron (pulsar) stars or black holes
4 0
3 years ago
What happens to a liquid when it loses energy
NeTakaya
It can solidify, it depends on the tempeture.
8 0
3 years ago
The electron gun in an old TV picture tube accelerates electrons between two parallel plates 1.4cm apart with a 28kV potential d
yulyashka [42]

Answer:

a)   F = 3.2 10⁻¹⁰ N , b)       v = 9.9 10⁷ m / s

Explanation:

a) The electric force is

       F = q E

The electric field is related to the potential reference

     V = E d

     E = V / d

Let's replace

    F = e V / d

Let's calculate

    F = 1.6 10⁻¹⁹ 28 10³ / 1.4 10⁻²

    F = 3.2 10⁻¹⁰ N

b) For this part we can use kinematics

          v² = v₀ + 2 a d

          v = √ 2 ad

Acceleration can be found with Newton's second law

        e V / d = m a

        a = e / m V / d

        a = 1.6 10⁻¹⁹ / 9.1 10⁻³¹ 28 10³ / 1.4 10⁻²

        a = 3,516 10⁻¹⁷ m / s²

Let's calculate the speed

       v = √ (2 3,516 10¹⁷ 1.4 10⁻²)

       v = √ (98,448 10¹⁴)

       v = 9.9 10⁷ m / s

3 0
2 years ago
Question 2: In 2-4 sentences, explain what would happen to the cell if the nucleus didn’t work?
VladimirAG [237]

Answer:

Then the cell won't be able to function properly. With no nucleus the cell will lose control. It won't know what to do and there will be no cell division.

Explanation:

7 0
2 years ago
Other questions:
  • Chef Susan tosses some pizza dough in the air, then catches it again at the same height. The pizza dough is in the air for 1.0\,
    7·1 answer
  • Determine whether each substance will sink or float in corn syrup, which has a density of 1.36 g/cm3. Write “sink” or “float” in
    11·2 answers
  • When applying the process of science which of theseis tested 1.a question, 2.an observation, 3.a conclusion, 4.a prediction
    14·2 answers
  • The surface layer of the sun, just below the chromosphere
    5·1 answer
  • The magnetic dipole moment of Earth has magnitude 8.00 1022 J/T.Assume that this is produced by charges flowing in Earth’s molte
    13·1 answer
  • A child bounces a 51 g superball on the sidewalk. The velocity change of the super bowl is from 22 m/s downward to 14 m/s upward
    7·1 answer
  • The speed of light changes as it passes from one medium to the next. In which image does the speed of light change the most?
    8·2 answers
  • Which is the atomic number of the carbon diagram below!
    11·1 answer
  • Show by dimension that the equation of motion is correct <br>V² = U²+2as​
    8·1 answer
  • A teacher took two latex balloons and blew them up with helium gas to the same size. She took one and labeled it Balloon A and p
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!