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swat32
2 years ago
6

a car takes 125 ft to brake from 60 to 0 mph. Assume that the acceleration of the Prius is constant while braking. Find how long

it takes for the Prius to come to a stop. Long problems begin on the next page
Physics
1 answer:
max2010maxim [7]2 years ago
7 0

Answer:

2.84 seconds

Explanation:

t = ?

distance = 125

Velocity origianal = 60 m/hr = 88 ft/s

     AVERAGE velocity = 88/2 = 44 ft/s

44 t = 125

t = 125/44 = 2.84 s

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What sequence shows electromagnetic waves arranged from shorter to longer wavelengths ?
timama [110]

so from what i was looking at i think the answer is d because The shorter the wavelength, the higher measure of vitality it produces.So the request is D. Bright beams, Visible light, Infrared, and Microwaves.


7 0
3 years ago
a heat engine with an efficiency of 30.0% performs 2500 j of work. how much heat is discharged to the lower temperature reservoi
Free_Kalibri [48]

Answer:

Q₂ = 5833.33 J

Explanation:

First we need to find the energy supplied to the heat engine. The formula for the efficiency of the heat engine is given as:

η = W/Q₁

where,

η = efficiency of engine = 30% = 0.3

W = Work done by engine = 2500 J

Q₁ = Heat supplied to the engine = ?

Therefore,

0.3 = 2500 J/Q₁

Q₁ = 2500 J/0.3

Q₁ = 8333.33 J

Now, we find the heat discharged to lower temperature reservoir by using the formula of work:

W = Q₁ - Q₂

Q₂ = Q₁ - W

where,

Q₂ = Heat discharged to the lower temperature reservoir = ?

Therefore,

Q₂ = 8333.33 J - 2500 J

<u>Q₂ = 5833.33 J</u>

7 0
3 years ago
Suppose you take a piece of hard wax from an unlit candle. After you roll the wax between your fingers for a while, it becomes s
romanna [79]

Answer:

An amorphous solid does not have a definite melting point; instead, it melts gradually over a range of temperatures, because the bonds do not break all at once. This means an amorphous solid will melt into a soft, malleable state (think candle wax or molten glass) before turning completely into a liquid.

Explanation:

Hope this helps

May I get braineist pls?

5 0
2 years ago
A horizontal spring with spring constant of 9.80 N/m is attached to a block with a mass of 1.20 kg that sits on a frictionless s
Andreas93 [3]

Answer:

Explanation:

Given

at certain point displacement and velocity is 0.345 m and 0.54 m/s

Therefore Potential and Kinetic Energy associated is

U=\frac{1}{2}kx^2

U=\frac{1}{2}\times 9.8\times (0.345)^2

U=0.583 J

Kinetic Energy K=\frac{1}{2}mv^2

k=\frac{1}{2}\times 1.2\times (0.54)^2=0.174 J

Total Energy T=U+K=0.583+0.174=0.757 J

Total Energy is conserved hence at maximum displacement  all energy will be Potential energy

T=\frac{1}{2}kA^2

where A=maximum displacement

0.757=\frac{1}{2}\times 9.8\times A^2

0.1544=A^2

A=0.393 m

Maximum speed occurs at equilibrium Position where Potential Energy is zero

thus T=\frac{1}{2}mv^2

0.757=\frac{1}{2}\times 1.2\times v_{max}^2

v_{max}=1.123 m/s

(c)When block is at 0.2 m from Equilibrium speed then its Potential Energy is

U=\frac{1}{2}kx^2=\frac{1}{2}\times 9.8\times (0.2)^2=0.196 J

T=U+K

K=0.757-0.196=0.561 J

K=\frac{1}{2}mv^2

0.561=\frac{1}{2}\times 1.2\times v^2

v=0.966 m/s

7 0
3 years ago
Andy has set a goal to be able to run 65 laps on the PACER by the end of the school year. This is an example of a ____.
lana66690 [7]

Answer:

The answer is long- term goal

Explanation:

6 0
3 years ago
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