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3 years ago

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Physics

1 answer:

slava [35]3 years ago

3 0

(1) particle model only

(2) and (4) wave model only

==> (3) either one

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You and a highway patrolman are driving at constant speeds in opposite directions on a straight highway. The patrolman is drivin

kompoz [17]

Answer: 75 mph

Explanation:

The Relative Speed for a mobile is equal to the diference between the object and the observer:

Relative Speed (Rs) = Object's Velocity - Observer's Velocity

Thinking on those terms, we would need to have a universal observer to do any understandable measurement on daily basics. This is why we all use earth as a Static Observer for every measurement we do everyday.

Using Earth as an observer, the Velocity for the Patrolman is:

Patrolman Velocity (Vp) = 60 mph

Because the radar gun does measure the Relative Speed for the object, which is 135 mph, we need to work with the equation to find the Velocity using Earth as a reference.

Object's Relative Velocity = Object's Velocity - Patrolman's Velocity

Object's Velocity = Object's Relative Velocity + Patrolman's Velocity

We need to keep in mind, the Patrolman is going on the opposite direction. Because of this the sign for his velocity should be negative.

Object's Velocity = 135 mph + ( -60 mph)

Object's Velocity = 135 mph - 60 mph

Object's Velocity = 75 mph

3 0

3 years ago

Help me!! giving out brainlest

Stolb23 [73]

Asteroid 1 has more mass because the same force exerted caused this asteroid to move less therefore having more mass

3 0

3 years ago

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The board sandwiched between two other boards shown below weighs 87.5 n. if the coefficient of friction between the boards is 0.

IRINA_888 [86]

Refer to the diagram shown below.

W = 87.5 N, the weight of the sandwiched board.
μ = 0.622, the static coefficient of friction.

From the free body diagram of the sandwiched board, obtain
2μF = W
F = W/(2μ) = 87.5/(2*0.622) = 70.34 N

Answer: 70.34 N

8 0

2 years ago

Read 2 more answers

A particular stimulus causes an increase in the levels of CO2 in the blood. A feedback mechanism that increases respiration rate

ivanzaharov [21]

Answer:

Negative

Explanation:

The respiratory plays a remarkable role in the regulation of CO2. It is responsible for gas exchange. The body gets rid of CO2 by breathing out. The goal of respiration is to decrease the CO2 levels.

4 0

3 years ago

I need help !!!!! Show the work plz!!!!

horrorfan [7]

Answer:

26) 2 meters a second

27) 2 meters a second

28) 5 meters a second

29) 8 km

Explanation:

1/.5 =2

8/4=2

50/10=5

8km×1= 8

7 0

3 years ago