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kati45 [8]
3 years ago
7

Energy that does not involve the large-scale motion or position of objects in a system is called:

Physics
1 answer:
Kryger [21]3 years ago
4 0
I believe the answer is C.
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A truck covers 40.0 m in 7.50 s while uniformly slowing down to a final velocity of 2.55 m/s. (a) Find the truck's original spee
iris [78.8K]

Answer:

(a) 8.117 (b) 0.742m/sec^2

Explanation:

We have given distance s =40 m time t=7.5 sec

Final velocity v =2.55 m/sec

From the first equation of motion v=u-at (negative sign because there is retrdation as the truck speed is slowing down )

So 2.55=u-7.5a --------------eqn 1

From the second equation of motion s=ut-\frac{1}{2}at^2 ( negative sign because there is retrdation as the truck speed is slowing down )

So 40=7.5u-0.5\times a\times 7.5^2

40=7.5u-28.125a------------------eqn 2

On solving eqn1 and eqn 2

u=8.117 m/sec and a=-0.742m/sec^2

7 0
3 years ago
A 2kg watermelon is dropped from a 4m tall roof a) use the appropriate kinematic equations to determine the instantaneous veloci
Ivenika [448]

Answer:

8.85m/s

Explanation:

The potential energy the watermelon held before dropping is Ep=mgh=2*9.8*4=78.4J.

When it strikes the ground, all of its Ep will transfer into Ek, so 1/2*m*v^2=78.4.

We already knew that m=2, so insert that in, we will get the V^2=78.4 m/s, V=8.85 m/s

6 0
3 years ago
Which was the first object made by humans to orbit earth?
Romashka-Z-Leto [24]

The first human made object made to orbit earth was the Soviet Union's Sputnik 1, it launched the 4th of October 1957.

6 0
3 years ago
A bicyclist moves along a straight line with an initial velocity vo and slows downs. Which of the following the best describes t
xeze [42]

????????????????????

3 0
3 years ago
Ksp for agbr is 5x10-13. what is the maximum concentration of silver ion that you can have in a 0.1 m solution of nabr?
liberstina [14]

Answer : The maximum concentration of silver ion is 5\times 10^{-12}m

Solution : Given,

K_{sp} for AgBr = 5\times 10^{-13}

Concentration of NaBr solution = 0.1 m

The equilibrium reaction for NaBr solution is,

NaBr(aq)\rightleftharpoons Na^++Br^-

The concentration of NaBr solution is 0.1 m that means,

[Na^+]=[Br^-]=0.1m

The equilibrium reaction for AgBr is,

                          AgBr\rightleftharpoons Ag^++Br^-

At equilibrium                     s       s

The expression for solubility product constant for AgBr is,

K_{sp}=[Ag^+][Br^-]

The concentration of Ag^+ = s

The concentration of Br^- = 0.1 + s

Now put all the given values in K_{sp} expression, we get

5\times 10^{-13}=(s)(0.1+s)

By rearranging the terms, we get the value of 's'

s=5\times 10^{-12}m

Therefore, the maximum concentration of silver ion is 5\times 10^{-12}m.

4 0
3 years ago
Read 2 more answers
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