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3 years ago

Mike drove 70 km due west and then 100 km due east.

Physics

1 answer:

Deffense [45]3 years ago

4 0

Distance = 170 km Displacement = 30 km East Speed = 56-2/3 km/hr Velocity = 10 km/hr East

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a particle is moving in a circle of radius R with constant speed.The time period of particle is T=1 second.In a time t=T/6,if th

12345 [234]

at t=T/6, total distance covered= 2*pi*r/6 and displacement= r

difference of them = 2*t
so, 2*pi*r/6- r =2(1/6)=1/3

r=1/(pi-3)=7.062

4 0

3 years ago

Read 2 more answers

Which of the following is true concerning nuclear fusion?

Artyom0805 [142]

Choice-a is a very rubbery, imprecise, ambiguous, slippery statement. But it's probably less wrong than any of the other choices on the list.

6 0

3 years ago

Calculate the average induced voltage between the tips of the wings of an airplane flying above East Lansing at a speed of 885 k

Yakvenalex [24]

Answer:

=0.855V

Explanation:

The induced voltage can be calculated using below expression

E =B x dA/dt

Where dA/dt = area

B= magnetic field = 6.90×10-5 T.

We were given speed of 885 km/h but we will need to convert to m/s for consistency of unit

speed = 885 km/h

speed = 885 x 10^3 m/hr

speed = 885 x 10^3/60 x60 m/s

speed = 245.8 m/s

If The aircraft wing sweep out" an area

at t= 50.4seconds then we have;

dA/dt = 50.4 x 245.8

= 123388.32m^2/s

Then from the expression above

E =B x dA/dt substitute the values of each parameters, we have

E = 6.90 x 10^-5 x 12388.32 V

E =0.855V

Hence, the average induced voltage between the tips of the wings is =0.855V

6 0

3 years ago

A truck pulls a trailer at a constant velocity for 100 m while exerting a force of 480 N. Calculate the work done.

Arisa [49]

The answer is c because:

Work done =force x distance

5 0

3 years ago

It is important to understand the differences between chemical and physical changes. Chemical changes result in new substances,

sergiy2304 [10]

Explanation:

Other characteristics of these changes are:

Physical changes are easily reversible but chemical changes are not.

Physical changes involves no change in mass like chemical changes.

Physical changes require little energy unlike chemical changes.

Water turns to steam when boiled over a Bunsen burner Physical change

This is a physical change of state. It is called evaporation. Here, hydrogen bonds between each water molecules are broken and they turn to gases in steam phase.

H₂O $_{l}$ → H₂O $_{g}$

Carbon combines with oxygen to form carbon dioxide gas Chemical change

This is a typical chemical change":

C + O₂ → CO₂

A new product is formed and this reaction is not easily reversible.

Water breaks down into hydrogen and oxygen gases. Chemical change

This is also a chemical change in which new products are formed:

H₂O → H₂ + O₂

Limestone breaks down into lime and carbon dioxide when heated Chemical change

This is a chemical change as new product forms:

CaCO₃ → CaO + CO₂

Learn more:

Chemical change brainly.com/question/9388643

#learnwithBrainly

5 0

3 years ago