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schepotkina [342]

2 years ago

7

the two rotating systems shown in the figure differ only in that the two identical movable masses are positioned at different di

stances from the axis of rotation. if you release the hanging blocks simultaneously from rest, and if the ropes do not slip, which block lands first?

1 answer:

svetoff [14.1K]2 years ago

7 0

Answer: the block at the right lands first

Explanation:

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A bullet is fired at an angle θ above the horizontal with an initial velocity of 800 m/s from the top of an 80 m high tower. Wha

Irina-Kira [14]

Answer:

pahingi po ng pic pls para masagutang kopo iyan

6 0

1 year ago

The engine in an imaginary sports car can provide constant power to the wheels over a range of speeds from 0 to 70 miles per hou

Inessa05 [86]

Answer:

a) 4.40 s

b) 2.20 s

Explanation:

Given parameters are:

At constant power ,

initial speed of the car, $v_0=0$

final speed of the car, $v=32$ mph

At full power,

initial speed of the car, $v_0=0$

final speed of the car, $v=64$ mph

a)

At constant power, $KE = \frac{1}{2} mv^2$

At full power, $KE = \frac{1}{2} m(2v)^2$

So $KE_f = 4KE_i$

So, time to reach 64 mph speed is 4 times more than the initial time

$t = 4*1.10 =4.40$ s

b)

$v=v_0+at\\a=\frac{v-v_0}{t}=\frac{32-0}{1.1/3600}=104727.27$ $miles/hours^2$

For final 64 mph speed,

$v=v_0+at\\t=\frac{v-v_0}{a}=\frac{64-0}{104727.27} = 6.111*10^{-4}$ $hours$ = $6.111*10^{-4}*3600=2.20$ s

7 0

2 years ago

Technician A says mechanical efficiency is a comparison between brake horsepower and indicated horsepower. Technician B says vol

Reil [10]

Answer:Both are correct

Explanation:

Both are correct because

Mechanical efficiency is the dimensionless term which is the ratio of brake horsepower to the Indicated horse Power

Where brake power is the Power obtained at the crankshaft and

Indicated horsepower is the power obtained in the combustion chamber and this power is the loss in the form of friction.

Volumetric efficiency is the ratio of actual fuel intake to the maximum air fuel that could be taken.

8 0

2 years ago

If you pull a wool sweater over your head, you will often end up with a wild hairdo. Your hair is hard to comb and wants to stan

Sergio [31]

Becasue when you rubbed your hair while you were putting on your sweater it caused it to rub against together causing electricity thingy lol. and thats why your hair goes straigh tup.

5 0

2 years ago

What is the mass number of an atom with five protons and seven neutrons

SVEN [57.7K]

Answer:

12

Explanation:

The number of electrons in an atom is always the same as the number of protons, so atoms are electrically neutral overall.

Atoms can lose or gain electrons. When they do, they form charged particles called ions:

if an atom loses one or more electrons, it becomes a positively charged ion

if an atom gains one or more electrons, it becomes a negatively charged ion

Hope this helps

8 0

2 years ago