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
cestrela7 [59]
3 years ago
15

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

Physics
1 answer:
svetoff [14.1K]3 years ago
6 0

Average speed = (total distance covered) / (time to cover the distance)

-- Traveling at 40 mph for 1 hour, the distance covered is 40 miles.

-- Traveling at 60 mph for 1 hour, the distance covered is 60 miles.

-- Total distance covered = (40 miles) + (60 miles) = 100 miles

-- Total time = (1 hour) + (1 hour)  =  2 hours

-- Average speed = (100 miles) / (2 hours)

<em>Average speed = 50 miles per hour</em>

You might be interested in
In science, Bob learns that the energy of a wave is directly proportional to the square of the waves amplitude. If the energy of
KIM [24]
The energy of a wave is directly proportional to the square of the waves amplitude. Therefore, E = A² where A is the amplitude. This therefore means when the amplitude of a wave is doubled the energy will be quadrupled, when the amplitude is tripled the energy increases by a nine fold and so on.
Thus, in this case if the energy is 4J, then the amplitude will be  √4 = 2 .
  


4 0
3 years ago
Think and discuss: Why do you think the rate of temperature change does not stay constant over time? If possible, discuss your a
gogolik [260]

Because the temperature of the place its contained in is constantly changing, for example, if you put a room temperature item in the fridge it will become cold, or whatever the temperature you set your fridge to.

6 0
3 years ago
The electromagnetic waves that have the lowest frequency is called
Luda [366]
Radar waves are the waves with the lowest energy.
5 0
3 years ago
A small, closed chamber of gas is heated. When the gas in the chamber expands,it does 5 J of work on a piston. The gas has an in
Anestetic [448]

Given:

Work done, W = 5 J

Initial energy = 8J

Final energy = 30J

Let's determine if the work done have a positive or nrgative value.

Appy the equation for the first lae of thermodynamics:

\Delta U=Q-W

Where:

U is the change in internal energy

Q is the added heat

W is the work done

To find the work done here, we have:

Rewrite the formula for W

W=Q-\Delta U

Where:

ΔU = 30J - 8J = 22J

Q = 5J

Thus, we have:

\begin{gathered} W=5J-22J \\  \\ W=-17J \end{gathered}

Therefore, the work done here is -17J.

This means the work done in this scenario has a negative value.

ANSWER:

The work done in this scenario has a negative value

3 0
1 year ago
A 15 kg object and a 18 kg object are connected by a massless compressed spring and
MatroZZZ [7]

Hi there!

This is an example of a recoil collision.

Using the conservation of momentum:

p_i = p_f

The initial momentum is 0 kgm/s (objects start from rest), so:

p_f = 0

We are given that the 15 kg block has a velocity of 12 m/s to the left, so:

m_1v_1' + m_2v_2' = 0 \\\\15(-12) + 18v_2' = 0 \\\\

Solve for v2':

18v_2' = 180 \\\\v_2' = \boxed{10 m/s}

5 0
2 years ago
Other questions:
  • In astronomy, the term perihelion refers to the point in the orbit of an asteroid, comet, or planet when it is closest to the su
    15·1 answer
  • Plane 1 leaves city A at 7 am and flies at a speed of 250 mph in a straight line towards city B, located 1000 miles North of cit
    8·1 answer
  • A car speeds up from 12.0 m/s to 16.0 m/s in 8.0 s. the acceleration of the car is?
    15·1 answer
  • Calculating the Force of friction
    13·1 answer
  • Two precautions in images of a convex lens
    9·2 answers
  • What is the term that describes<br> the material through which a wave travels?
    7·1 answer
  • Do all objects have inertia <br><br> a) true<br> b) false
    10·1 answer
  • A feather, a tennis ball, and a bowling ball are dropped from a high tower on
    15·1 answer
  • What is the period, in seconds, that corresponds to each of
    15·1 answer
  • what is the electrical potential at the surface of gold nucleus? The radius of a gold atom is 6.6*10​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!