4 years ago

Our family car travels 40 miles in 2 hours. What is our average speed in mph?

Physics

1 answer:

skad [1K]4 years ago

3 0

Your average speed is 20 mph, but ONLY IF YOU'RE IN THE CAR during those 2 hours.

You might be interested in

A blue car with mass mc = 427 kg is moving east with a speed of vc = 20 m/s and collides with a purple truck with mass mt = 1282

polet [3.4K]

Answer:8540 kg-g/s

Explanation:

Given

mass of blue car $m_c=427 kg$

velocity of blue car $v_c=20 m/s$

mass of the truck $m_t=1282 kg$

speed of truck $v_t=13 m/s$

After collision they stick and lock together

Let v be the velocity of combined system at angle \theta from vertical

Conserving momentum in east direction

$m_c\times v_c=(m_c+m_t)v\cos \theta$

$427\times 20 =1709\times v\cos \theta$ ------1

Conserving Momentum in Y direction

$m_t\times v_t=(m_c+m_t)v\sin \theta$

$1282\times 13 =1709\times v\sin \theta$ -------2

squaring and then adding 1 & 2 we get

$(8540)^2+(16666)^2=(1709)^2\cdot v^2$

v=10.95 m/s

initial momentum of car $=427\times 20=8540 kg-m/s$

6 0

4 years ago

When you're 10 or 20 miles away from the origin of an earthquake, the P-waves get to you a little bit before the S-waves. Which

zvonat [6]

Explanation:

P, Primary, or Compressional waves travel the fastest (~6 km/sec in the upper crust). They cause the matter to oscillate forward and backward, parallel to the motion of the seismic wavefront. P waves push (compress) and pull (dilate) the rock that they pass through.

yor answe is (B)

4 0

3 years ago

3. A body moves along a semicircular path. The ratio of distance to displacement is

stiks02 [169]

Answer:

Ratio of distance to displacement is pi/2

Explanation:

Pls see attached file for diagram and explanation

3 0

3 years ago

A sound-producing object is moving away from an observer. The sound the observer hears will have a frequency that actually being

kozerog [31]

Lower than, this is due to the doplar effect

6 0

3 years ago

Read 2 more answers

Match each feature related to the process of seafloor spreading with its location on the diagram

nikklg [1K]

Answer:

Seafloor spreading is a geological process that occurs in the ocean. It is occurs due to divergent plate tectonics. As, lithospheric plates of the ocean moves away from each other, the heat from the mantle liberates as convection currents that decreases the density of the crust. The less dense material rises, resulting the elevation of the seafloor, which is called as sea floor spreading.

Explanation:

4 0

3 years ago