<span>1. Thermometer : a tool that measures temperature. Balance : used to measure the mass of an object to a know unit of mass. Compass : a tool that uses a magnetized pointer to show magnetic north. Barometer : a weather instrument that measures air pressure. Graduated Cylinder : used to measure the volume of liquids. Science Tools and Equipment<span><span>2. </span>Spring Scale : a tool that measures the pull of gravity on an object. Magnifier : a toll that lets you see things you cannot see with just your eyes. Microscope : a tool that lets you see objects that are too small to see with a magnifier. Petri dish : small, flat, clear dish used to grow mold or bacteria. Safety goggles : for eye protection when working with liquids or other materials that might get into eyes.</span><span><span>3. </span>Collection net : useful for gathering leaves and other materials needed for investigations. Test tube : a small, narrow glass tube used in an investigation. First aid : band-aids and bandages for safety. Stop watch : a tool used to measure elapsed time. Apron : protective covering for clothes. Bunsen burner : an open-flame heat source used to heat substances in an investigation.</span><span><span>4. </span>Journal : a record of your science investigation. Hot plate : a warming surface used to heat a substance in an investigation. Flask : a container with a large flat base and narrow spout used to hold liquids. Meter stick : a tool used to measure length or distance in metric units. Telescope : used to observe and study objects in space.</span><span><span>5. </span>Anemometer : a tool used to measure wind speed or velocity. Eyedropper : used to measure liquids by the drop. Gloves : protective covering for hands. Magnet : an object that attracts iron or steel.
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Answer:
v = 120 m/s
Explanation:
We are given;
earth's radius; r = 6.37 × 10^(6) m
Angular speed; ω = 2π/(24 × 3600) = 7.27 × 10^(-5) rad/s
Now, we want to find the speed of a point on the earth's surface located at 3/4 of the length of the arc between the equator and the pole, measured from equator.
The angle will be;
θ = ¾ × 90
θ = 67.5
¾ is multiplied by 90° because the angular distance from the pole is 90 degrees.
The speed of a point on the earth's surface located at 3/4 of the length of the arc between the equator and the pole, measured from equator will be:
v = r(cos θ) × ω
v = 6.37 × 10^(6) × cos 67.5 × 7.27 × 10^(-5)
v = 117.22 m/s
Approximation to 2 sig. figures gives;
v = 120 m/s