<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:
Average velocity = -3.84 m/s
Explanation:
Given the following data;
Initial velocity = 0 m/s
Final velocity = -7.68 m/s
To find the average velocity;
Average velocity = (U + V)/2
Average velocity = (0 + [-7.68])/2
Average velocity = -7.68/2
Average velocity = -3.84 m/s
Therefore, the average velocity of the rock is -3.84 meters per seconds.
Answer:
Explanation:
(a) It is given that Joseph jogs on a straight road of 300m in a time interval of 2 minutes and 30 seconds, which is equal to 150seconds. Therefore, when Joseph jogs from point A to point B, he covers a distance of 300m in time of 150seconds. Hence, his average speed is 300m/150s=2ms^−1. Since it is a straight road and he jogs in a single direction in this case, his displacement is equal to 300m. Since it is a straight road and he jogs in a single direction in this case, his displacement is equal to 300m.
Hence, his average velocity is 300m/150s=2ms^−1
(b) Then it is given that he turns back and points B and jogs on the same road but in the opposite direction for a time interval for 1 minute and covers a distance of 100m.If we consider the whole motion of Joseph, i.e. from point A to point C, then he covers a total distance of 300m+100m=400m. And he covers this total distance in a time interval of 2.5min+1min=3.5min=210s.
Therefore, his average speed for this journey is 400m210s=1.9ms−1.
For the same journey is displacement is equal to the distance between the points A and C,i.e. 300m−100m=200m.
Hence, his average velocity for this case is 200m/210s=0.95ms^−1
1). Vector
2). Scalar
3). Magnitude
4). Components
5). Free body diagram