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agasfer [191]
3 years ago
9

1.An 800 kg car has an initial speed of 15 m/s measured at the bottom of a hill. Air resistance and other resistive forces cause

a total of 10000 J of energy to be removed from the car as the car travels up the hill. The final speed of the car at the top of the hill is 5 m/s. What is the height of the hill
Physics
1 answer:
Ludmilka [50]3 years ago
3 0

Answer:

10

Explanation:

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. Assume you have a dot grid with 36 dots per sq.in. How many acres are represented by each dot using the following map scales:
elixir [45]

Answer:

a) 0.069 acres

b) 0.114acres

c) 17.78acres

Explanation:

1 dot=1/36sqin

a) 1 sqin= 330×330=108900ft^2

1 dot=108900/36 =3025ft^2

Converting to acre,divide by43560

3025/43560 =0.069acre

b) 1 chain =22 yards

25×22=550yards

Converting to acre divide by 4840

550/4840 =0.114acre

c)1 sqmile =640acres

(1/36) ÷ 640

640/36

17.78acres

4 0
3 years ago
A drone flies 8 m/s due East with respects to the wind. The wind is blowing 6 m/s due North with respects to the ground. What is
Shalnov [3]

Answer:

v=10 m/s

Explanation:

Given that,

Speed of a drone is 8 m/s due East with respects to the wind

Speed of a drone 6 m/s due North with respect to the ground.

We need to find the speed of the drone with respect to the ground. Let v is the speed. It is given by the resultant of two speeds.

v=\sqrt{8^2+6^2} \\\\v=10\ m/s

So, the speed of the drone with respect to the ground is 10 m/s.

7 0
3 years ago
Need today please
podryga [215]

Answer:

yeah righto the correct answer mate would be D) :)

5 0
3 years ago
PLS HELP DUE IN 20 MINS!!! True or false: You can make a pulse travel at a faster speed without changing the shape or size of th
harina [27]

Answer:

False

Explanation:

A Larger pulse with more energy means that the wave has a large amplitude. As in the given question, both the waves are travelling in the same medium, hence their speeds will remain the same and therefore the larger pulse will not overtake the smaller pulse. Remember the amplitude of a wave does not affect the speed at which the wave travels.

7 0
3 years ago
How would you describe the atmosphere to a friend.
Misha Larkins [42]

Answer:

its a shield that can protect us from super hot rays and all though ita not that strong atleast we wont get burned to death lol :)

6 0
3 years ago
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