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3 years ago

In what two ways can a machine alter an input force?

2 answers:

7 0

A machine can alter an input force by changing its (1) magnitude, or (2) direction. Allmachines are subject to energy conservation in that no machine can output more energy (do more work) than the energy put into it.

trasher [3.6K]3 years ago

6 0

It can change the force's magnitude and its direction. A machine can multiply force at the expense of distance but cannot multiply work.

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Two north poles will blank

soldier1979 [14.2K]

Answer:

Be pushed away from each other.

Explanation:

7 0

3 years ago

I'm trying to find the potential energy of a planet using formula G M(sun) x m(planet) / r. I have given G - newton's graviation

ludmilkaskok [199]

Answer:

$-5.39\times10^{33} J$

Explanation:

Potential energy =

$-\frac{GMm}{r}\\=-\frac{6.67\times10^{-11}\times1.99\times10^{30}\times5.97\times10^{24}}{147/1\times10^{9}}\\=-5.39\times10^{33} J$

7 0

2 years ago

Two piano strings produce beats. Frequencies of the strings are 1560 Hz. and 1563 Hz. Choose the correct frequency of the beats.

kakasveta [241]

Beat frequency is given by the difference of two frequencies played together

$f_{beat} = |f_1 - f_2|$

given that

$f_1 = 1560 Hz$

$f_2 = 1563 Hz$

Now

$f_{beat} = |1560- 1563| Hz$

$f_{beat} = 3 Hz$

3 0

3 years ago

Read 2 more answers

Two sets of Christmas lights are available. For set A, when one bulb is removed, the remaining bulbs remain illuminated. For set

Paul [167]

Explanation:

Bulbs are nothing but resistors that glow when current passes through them.

In Set A, the bulbs (resistors) are connected parallely to each other, this means that even if one of the bulbs fuses or removed, the circuit will still be completed and others continue to glow.

And in parallel connection if the resistance of the two resistors are same powered delivered to each is same.

In Set B, bulbs are in series connection, this means that when one of the bulb is removed or fuses, the circuit will break and other bulbs can not operate.In this situation as well if the resistance of two resistors is same then the power delivered is same.

7 0

3 years ago

A)what are oxidation numbers? b) what useful functions do oxidation numbers serve

9966 [12]

A) indicate the general distribution of electrons among bonded atoms in molecular compounds
B)useful in naming compounds, writing formulas, and balancing chemical equations
may be used to determine the simplest chemical formula

5 0

3 years ago