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kondaur [170]
3 years ago
6

Can you please help - the answer I got so far is 7.624 but when I enter it in my homework in Quest, it i stating that this answe

r is wrong. Can you please let me know what the correct answer is? You are driving at the speed of 33.5 m/s (74.9534 mph) when suddenly the car in front of you (previously traveling at the same speed) brakes and begins to slow down with the largest deceleration possible without skidding. Considering an average human reaction, you press your brakes 0.549 s later. You also brake and decelerate as rapidly as possible without skidding. Assume that the coefficient of static friction is 0.778 between both cars’ wheels and the road. The acceleration of gravity is 9.8 m/s 2 . Calculate the acceleration of the car in front of you when it brakes. Answer in units of m/s 2 .
Physics
1 answer:
torisob [31]3 years ago
6 0

Answer:

-7.04

Explanation:

9.8 multipled by -0.719 b

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Sholpan [36]

Answer:

Potential energy is stored energy and the energy of position––gravitational energy. There are several forms of potential energy. Electrical Energy is the movement of electrical charges. Everything is made of tiny particles called atoms.

5 0
2 years ago
What conclusion does the student most likely make based
inna [77]

Answer:

option a

Explanation:

Light is an electromagnetic wave which can travel in vacuum as well as any medium. The speed of light is maximum in vacuum. The electromagnetic wave travels by oscillating electric and magnetic field to the direction of motion of wave.

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Thus, the student should conclude option a.

8 0
3 years ago
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Which of the following statements are true? Check all that apply. A.Earth's geographic south pole is also a magnetic south pole.
ycow [4]

Answer:

C.The north pole of a bar magnet will attract the south pole of another bar magnet.

D.The south poles of two bar magnets will repel each other.

F.Earth's geographic north pole is actually a magnetic south pole.

Explanation:

The magnetic field is a region of space that exerts a force on charged particles in motion or on magnets.

A magnet is an object that produces a magnetic field in the region around it - a magnet always consists of a north pole and of a south pole; it is not possible to create a magnetic monopole: if a magnet is cut in a half, we end up with two new magnets, each of them having its own north and south pole.

The lines showing the direction of the magnetic field always go from the north pole towards the south pole.

When a magnet is placed near another magnet, the two magnets can attract/repel each other. In particular:

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- Opposite poles (north-south) attract each other

Moreover, the Earth has also a magnetic field, and its axis acts as a huge magnet. The location of the magnetic North pole corresponds to the location of the geographic South pole, and vice-versa.

According to what we said so far, the correct statements are:

C.The north pole of a bar magnet will attract the south pole of another bar magnet.

D.The south poles of two bar magnets will repel each other.

F.Earth's geographic north pole is actually a magnetic south pole.

4 0
4 years ago
How much heat is needed to raise the temperature of 1 kg of iron from 25 degree to 30 degrees?
stiv31 [10]

Answer:300 joules

Explanation:The formula for specific heat is:

E

=

m

c

θ

, where:

E

is the energy needed in joules,

m

is the mass in kilograms,

c

is the specific heat,

θ

is the change in temperature, Celsius of Kelvin doesn't matter.

Here,

m

=

0.125

kg

c

=

480

J/kg

∘

C

θ

=

5

∘

C

, and inputting:

E

=

0.125

⋅

480

⋅

5

E

=

300

J

of energy is needed.

4 0
4 years ago
What is concentration ​
Eddi Din [679]

concentration is the ratio of solute in a solution to either solvent or total solution.

3 0
3 years ago
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