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SIZIF [17.4K]
3 years ago
15

A motorist travels 406 km, West during a 7.0 hr period. What was the average velocity in (a) km/hr and (b) m/sec?

Physics
1 answer:
AVprozaik [17]3 years ago
6 0
Average velocity = (displacement) / (travel time)

Without more details, I just have to assume that the 406 km
is the displacement ... that is, the straight-line distance between
the start point and the end point.  If there were any turns, loops,
or backtracks during the trip, then this question couldn't be answered,
because we don't know the displacement. 

a). Average velocity = (406 km) / (7.0 hours) = 58 km/hr West.

According to the requirements stated in the question, I still
have to convert this answer to a different unit in order to 
rightfully claim the full 5-points bounty.

b). (58 km/hour) x (1,000 m/km) x (1 hour / 3600 sec) =  16-1/9 m/sec .
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93 cm3 liquid has a mass of 77 g. When calculating its density what is the appropriate number of significant figures
lubasha [3.4K]

Answer:

828 kg/m³ or 0.828 g/cm³

Explanation:

Applying,

D = m/V............. Equation 1

Where D = density of the liquid, m = mass of the liquid, V = volume of the liquid.

From the question,

Given: m = 77 g , V = 93 cm³

Substitute these values into equation 1

D = 77/93

D = 0.828 g/cm³

Converting to kg/m³

D = 828 kg/m³

6 0
3 years ago
You are driving your motorcycle in a circle of radius 75 m on wet pavement. what is the fastest you can go before you lose tract
stira [4]

On driving your motorcycle in a circle of radius 75 m on wet pavement, the fastest you can go before you lose traction, assuming the coefficient of static friction is 0.20 is 147m/s

Friction helps to maintain the slipping of the vehicle on the road hence lays a very important role.

Maximum velocity of a road with friction is given by the formula,

v = μRg

where, v is the maximum velocity

μ is the coefficient of static friction

R is the radius of the circle road

g is the acceleration due to gravity

Given,

μ = 0.20

R = 75m

g = 9.8m/s²

On substituting the given values in the above formula,

v = 0.20× 75 ×9.8

v = 147m/s

So, the Maximum velocity of the wet road is 147m/s.

Learn more about Velocity here, brainly.com/question/18084516

#SPJ4

3 0
2 years ago
How does brainy work
balandron [24]
You have to get points to asked a question and then you can help people to get points and it you want to have friends send them inventions but it you don't have no points you can't asked quenstions
8 0
3 years ago
Read 2 more answers
Use the drop-down menu to complete the statement. One difference between prokaryotic cells and eukaryotic cells is that a eukary
Ahat [919]

Answer:

Nucleus

Explanation: I did the quiz and got it right. Have an amazing day!

8 0
3 years ago
Runner A is initially 6.0 km west of a flagpole and is running with a constant velocity of 9.0 km/h due east. Runner B is initia
Eduardwww [97]

Answer:

From the data we know that runner A and runner B are 11 km apart from the start because (6+5) km

So the runner from the east direction has distance as unknown km, rate= 9 k/h ; time= d/r=x/9 hr

So runner towards the west will be

distance = 11-x, rate= 8 k/h, time = d/r = (11-x)/8

So equating east and west time we have

x/9= (11-x)/8

8x=99-9x

17x=99

x=5.92 km

That is the distance covered by runner towards the east and he will meet the runner toward the west at

6-5.92=0.08 km west of the flagpole.

7 0
4 years ago
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