Milwaukee is 121 mi (air miles) due west of Grand Rapids. Maria drives 255 mi in 4.75 h from Grand Rapids to Milwaukee around Lake Michigan. Find: a. Her average driving speed
b. Her average travel velocity

Answers

Answer 1

Answer: a).
Average speed = (distance driven) / (time to drive the distance)

   = (255 miles) / (4.75 hours)

   = (255/4.75) (mile/hour) = 53.7 miles per hour .

b).
Average velocity =

   (displacement) / (time for the trip)

   = (distance and direction from
       start-point to end-point,
   regardless of the route)    /    (time for the trip)

   = (121 miles west) / (4.75 hours)

   = (121 / 4.75) (miles per hour west)

   = 25.5 miles per hour west .

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Geologists cannot yet predict earthquakes because

Answers

Geologists cannot yet predict earthquakes because the earthquakes caused by the movement of plates do not have the precise time and place when will it moves.

What might be an advantage to making a magnet horseshoe-shaped?

Answers

Every magnet has at least one “North” and one “South” pole where its magnetic forces leave the magnet and enter its surroundings. It is commonly thought that the magnetic forces leave one pole and enter the other pole. Therefore, The magnetic forces are concentrating the forces between those poles and making the attraction/repulsion stronger. Hope this helps! :)

HELP FAST!!!!!!!Four beakers have water at 27 °C. A piece of metal is dropped into the water in each beaker. The table below shows the initial temperature of the four metals.
A - 30 degrees C
B - 42 degrees C
C - 25 degrees C
D - 16 degrees C
which metals will transfer heat to the water?
A. Metals A and metals B
B. Metals B and metals C
C. Metals C and metals D
D. Metals B and metals D

Answers

Answer

A. Metals A and metals B

Explanation

Heat transfer takes place whenever there is temperature difference. When two bodies of different temperatures are brought together, heat energy will move from one body to the other until equilibrium temperature is reached.

In our case, heat transfer will take place in all four metals.

Metal A will transfer heat to the water since it's temperature is higher than that of water.

Metal B will also transfer heat to the water since it's temperature is higher than that of water.

Metal C will get heat from the water since it's colder than the water.

Metal D will also get heat from the water since it is colder than water.

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Explanation:

Two men decide to use their cars to pull atruck stuck in mud. They attach ropes and
one pulls with a force of 515 N at an angle
of 31◦ with respect to the direction in which
the truck is headed, while the other car pulls
with a force of 926 N at an angle of 25◦ with
respect to the same direction. What is the net forward force exerted on
the truck in the direction it is headed?

Answers

The net forward force =( 515 cos 31deg ) +( 926 cos 25 deg )
= 441.44N + 839.24 N
= 1280.7N in truck direction

Is 1280.7N because u have 926(515) =441.44 n 839.24n.

A diet rich in high-density lipoproteins (HDLs) can help cleanse and open arteries that are clogged with plaque.a. True
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Answers

Correct answer choice is :

A) True

Explanation:

Lipoproteins are essentially a hub full of fat and cholesterol, along with a lipid layer that includes proteins named apolipoproteins. There are many kinds of lipoproteins, but the two most prominent ones are called Low-Density Lipoprotein and HDL.LDL particles are seldom related to as bad lipoprotein because of concentrations, dose-related, associated with atherosclerosis change. High-density lipoproteins (HDL) get fat molecules from the body's cells and take it back to the liver.

The correct answer for the question that is being presented above is this one: "TRUE." A diet rich in high-density lipoproteins (HDLs) can help cleanse and open arteries that are clogged with plaque. The statement that is presented is True.

Superposition of two wave crests produces