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
xz_007 [3.2K]
3 years ago
15

A car travels 400 km in 5 hours. what is the average speed of the car (in km/hr) ?

Physics
1 answer:
PtichkaEL [24]3 years ago
3 0
Distance travel = 400km
Time it took to travel 400km = 5 hr

Average speed = (distance travel)/(Time for that travel)

s = 400km/5h = 80km/hr

The average speed is 80km/hr.
You might be interested in
What is the density of a rock with a mass of 10 grams and a volume of 5 ml
Talja [164]
Density= mass/volume
So the answer is 2g/ml
Hope this helps!
3 0
3 years ago
When a football is kicked, the action and reaction forces do NOT cancel each other out because
AfilCa [17]

Answer:

C

Explanation:

The kicker exerts more force of the football which is why the football moves when its kicked.

6 0
3 years ago
A car collides into a concrete wall going 25.0 m/s . It stops in 0.141 seconds and has a change in momentum of 39,400. What is t
vodka [1.7K]

Answer:

Mass of the car is 1576 kg.

Explanation:

Let the mass of the car be m kg.

Given:

Initial velocity of the car is, u=25\ m/s

As the car stops, final velocity of the car is, v=0\ m/s

Change in momentum is, \Delta p=39400

Now, we know that, momentum is given as the product of mass and velocity.

So, change in momentum is given as:

\Delta p=m(u-v)\\39400=m(25-0)\\39400=25m\\m=\frac{39400}{25}\\m=1576\ kg

Therefore, the mass of the car is 1576 kg.

4 0
3 years ago
Light of frequency 5*10^14hz liberates electron with energy 2.31*10^-19 joule from a certain surface .what is wave length of ult
stealth61 [152]

Answer:  Light of frequency 5 x 1014 HZ liberates electrons with energy 2.3 x 10-19from a certain metallic surface.

Explanation:

5 0
2 years ago
HELP ASAP PLEASE!!!!!!!
pshichka [43]

Answer:a

Explanation: the plates shifts cracking making earthquakes

8 0
3 years ago
Other questions:
  • Household current in a circuit cannot generally exceed 15 for safety reasons. What is the maximum amount of charge taht could fl
    5·1 answer
  • A truck covers 40.0 m in 9.40 s while uniformly slowing down to a final velocity of 1.70 m/s.
    6·1 answer
  • spring stretches by 21.0 cm when a 135 N object is attached. What is the weight of a fish that would stretch the spring by 43.9
    6·1 answer
  • Most stars are<br> a.brown fs<br> b.main sequence<br> c.white dwarfs<br> d.pulsars
    15·1 answer
  • Kriste walks once around a large circle at a constant speed.
    5·1 answer
  • How can we represent a narrow beam of light?
    15·2 answers
  • How would I solve this? It's Newton's 2nd law
    7·1 answer
  • A wheel initially rotating at 12 rad/s decelerates uniformly to rest in 0.4 s. If the wheel has a rotational inertia of 0.5 kg.m
    15·1 answer
  • What are Base Quantities ?​
    10·2 answers
  • A simple pendulum of length 1.5m has a bob of mass 2.0kg. State the formula for the period of small oscillations and evaluate it
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!