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4 years ago

Does a can opener make work easier by increasing force, increasing distance, or changing direction?

Physics

1 answer:

ivann1987 [24]4 years ago

6 0

A can opener makes work easier by increasing force.

Explanation

Technically a can opener is a simple lever that increases the force with which we remove the cap of the can. Levers are rod shaped objects with fulcrum at one end and the length of the lever has a positive impact on the force.

considering the equation

work=force*distance

indicates that increasing the length of the lever/can opener increases the work done by it.

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A six pack of your favorite beverage (12 fl. oz. cans, assumed to have the same characteristics as water) is placed in a cooler

nasty-shy [4]

Answer:

$Q = 169 BTU$

Explanation:

As we know that volume is given as

$V = 12 Fl oz$

so it is given in liter as

$V = 12 fl oz = 0.355 Ltr$

now we have six pack of such volume

so total volume is given as

$V = 6\times 0.355 Ltr$

$V = 2.13 ltr$

so its mass is given as

$m = 2.13 kg$

now the change in temperature is given as

$\Delta T = 70 - 34 = 36 ^oF$

$\Delta T = 20^oC$

now the heat given to the liquid is given as

$Q = ms\Delta T$

$Q = 2.13(4186)(20)$

$Q = 1.78 \times 10^5 J$

$Q = 169 BTU$

4 0

3 years ago

A cylindrical block of mass M=50kg and height h=0.2m is hanging on a rope and is in equilibrium. Any difference in atmospheric p

agasfer [191]

Answer:

$\Delta P = 1961.4\,Pa$

Explanation:

The difference of pressure is given by gauge pressure:

$\Delta P = \rho_{w}\cdot g \cdot \Delta h$

$\Delta P = \left(1000\,\frac{kg}{m^{3}} \right)\cdot \left(9.807\,\frac{m}{s^{2}} \right)\cdot (0.2\,m)$

$\Delta P = 1961.4\,Pa$

8 0

4 years ago

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Which of the following has unbalanced force? Someone help pls

Levart [38]

I think its the car moving to a stop sign

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3 years ago

7. The Voyager 1 space probe was launched in the 1970's and is now the furthest

NikAS [45]

Answer:

v = 16.98 km/s

Explanation:

Given that,

Distance, d = 4500 km

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$v=\dfrac{4500\ km}{265\ s}\\\\=16.98\ km/s$

So, the average speed is 16.98 km/s.

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3 years ago

How many minerals are found in earths crust ?

Damm [24]

You can find your answer here www.rsc.org/education/teachers/resources/jesei/minerals/students.htm

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4 years ago

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