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A 6 kg cart is pulled on a level surface at a constant velocity of 2 m/sec by a constant force of 10 N. What is the acceleration? What is the frictional force opposing the motion?

Answered! |

A container is filled with water to a depth of

47.3 cm. On top of the water floats a 46.2 cm

thick layer of oil with a density of 503 kg/m3.

What is the absolute pressure at the surface

of the water? The acceleration of gravity is

9.81 m/s2 .

Answer in units of Pa.

47.3 cm. On top of the water floats a 46.2 cm

thick layer of oil with a density of 503 kg/m3.

What is the absolute pressure at the surface

of the water? The acceleration of gravity is

9.81 m/s2 .

Answer in units of Pa.

Answered! |

A 4.9 kg rectangular air mattress is 2.7 m

long, 1.16 m wide, and 0.183 m thick.

What mass can it support in water before

sinking?

Answer in units of kg.

long, 1.16 m wide, and 0.183 m thick.

What mass can it support in water before

sinking?

Answer in units of kg.

Answered! |

A hollow brass tube has outer diameter D =

3.1 cm. The tube is sealed at one end and

loaded with lead shot to give it a total mass

of M = 88 g. The tube floats in water (of

density 1 g/cm3) in vertical position, loaded

end down.

What is the depth of the bottom end of the

tube?

Answer in units of cm.

3.1 cm. The tube is sealed at one end and

loaded with lead shot to give it a total mass

of M = 88 g. The tube floats in water (of

density 1 g/cm3) in vertical position, loaded

end down.

What is the depth of the bottom end of the

tube?

Answer in units of cm.

Answered! |

long, 1.16 m wide, and 0.183 m thick.

What mass can it support in water before

sinking?

Answer in units of kg.

Answered! |

3.1 cm. The tube is sealed at one end and

loaded with lead shot to give it a total mass

of M = 88 g. The tube floats in water (of

density 1 g/cm3) in vertical position, loaded

end down.

What is the depth of the bottom end of the

tube?

Answer in units of cm.

Answered! |

47.3 cm. On top of the water floats a 46.2 cm

thick layer of oil with a density of 503 kg/m3.

What is the absolute pressure at the surface

of the water? The acceleration of gravity is

9.81 m/s2 .

Answer in units of Pa.

Answered! |

A pipe contains water at 5.6 × 105 Pa above

atmospheric pressure.

If you patch a 4.66 mm diameter hole in the

pipe with a piece of bubble gum, how much

force must the gum be able to withstand?

Answer in units of N.

atmospheric pressure.

If you patch a 4.66 mm diameter hole in the

pipe with a piece of bubble gum, how much

force must the gum be able to withstand?

Answer in units of N.

Answered! |

Air within the funnel of a large tornado may

have a pressure of only 0.19 atm.

What is the approximate outward force F

on a 9.1 m × 26 m wall if a tornado suddenly

envelopes the house? Atmospheric pressure is 1.013 × 105 Pa.

Answer in units of N.

have a pressure of only 0.19 atm.

What is the approximate outward force F

on a 9.1 m × 26 m wall if a tornado suddenly

envelopes the house? Atmospheric pressure is 1.013 × 105 Pa.

Answer in units of N.

Answered! |

An engineer weighs a sample of mercury ( density= 13.6 × 103 kg/m3) and finds that the weight of the sample is 4.3 N.

What is the sample’s volume? The acceleration of gravity is 9.81 m/s2 .

Answer in units of m3.

What is the sample’s volume? The acceleration of gravity is 9.81 m/s2 .

Answer in units of m3.

Answered! |