Unit Conversions
Convent 5.60 yards to inches.
(5.6 yards/1)(3 ft/1 yd)(12 in/1 ft)= 202 inches
Convent 126 inches squared to feet squared.
(126 ft2/1)(1 ft/12 in)2= 0.875 ft2
How many inches are in 1.3 miles? (1 mi= 5280 ft)
(1.3 mi/1)(5280 ft/1 mi)(12 in/1 ft)= 82,000 inches
The smallest unit of an element.
What is an atom?
The charge of 3 electrons.
What is -3?
Convent 15.0 cm. to yds.
(15.0 cm/1)(1 in./ 2.54 cm.)(1 ft./12 in.)(1 yd./3 ft.)= 0.164 yds.
How many pounds does 25.8 kilograms weigh? (1 lb=453.6g)
(25.8 mg/1)(1000 g/1 kg)(1 lb/453.6 g)= 56.9 lbs.
DAILY DOUBLE!
How many nanometers are there in 1.25 inches? (1 m= 10^9 nm)
(1.25 in/1)(2.54 cm/1 in.)(1 m/100 cm)(109 nm/1 m)= 3.18*107 nm.
You would do this to find the number of neutrons an atom has.
What is subtract the atomic number from the atomic mass?
The number of electrons an atom has usually matches this.
What is the atomic number?
Convent 1.03* 104 in2 to mi2. (5280 ft= 1 mi)
(10,300 in2/1)(1 ft/12 in)2(1 mi/ 5280 ft)2= 2.57 * 10-6 mi2
DAILY DOUBLE!
Convert 15 cm2 to ft2. (1 in= 2.54 cm)
(15 cm2/1)(1 in/2.54 cm)2(1 ft/ 12 in)2= 0.016 ft2
Convert 3.5 cm3 to in3. (1 in= 2.54 cm)
(3.5 cm3/1)(1 in/2.54 cm)3= 0.21 in3
The number of protons an atom has can be found by using this.
What is the atomic number?
The number of valence electrons Chlorine has.
What is 7?
Convert 25 m2/sec to ft2/ hr.
(25 m2/sec)(3600 sec/1 hr)(100 cm/1 m)2(1 in/2.54 cm)2(1 ft/12 in)2= 9.7 *105 ft2/hr
If 10.0 cubic meters of water is added to a reservoir already containing 5.0 cubic yards of water, what will be the new volume of water in cubic meters?
(5.0 yds3/1)(3 ft/1 yd)3(12 in/1 ft)3(2.54 cm/1 in)3(1 m/100 cm)3= 3.8 m3 + 10.0 m3= 13.8 m3
Convert 2.46 cm3/sec to in3/minute.
(2.46 cm3/sec)(60 sec/min)(1 in/2.54 cm)3= 9.01 in3/min
Where all of the atom's mass is located.
What is the nucleus?
The reason that the alkali metals are so reactive.
What is that they only have one valence electron?
The width of a box is 30.5 in, the depth is 1.07* 103 mm, and the height is 5.60* 10-4 miles. What is the volume of the box in inches cubed?
Width= 30.5 in, Depth= 42.1 in, Height= 35.5 in, Volume = 4.56* 104 in3
An object that weights 1.00 kg is thrown at 46.0 MPH. What is its kinetic energy in Joules (kg* m2/sec2)? (Kinetic Energy= 0.5mv2)
(1/2)(1.00 kg)(46.0 mi/hr)2(1 hr/ 3600 sec)2(5280 ft/1 mi)2(12 in/1 ft)2(2.54 cm/1 in)2(1 m/100 cm)2= 211 Joules
An object is traveling with a velocity of 98.0 MPH. In inches, how far will it travel in exactly 1 sec? (velocity=distance/time)
What makes an atom radioactive?
What is the number of neutrons?
The number of electron shells (layers) that Sulfur has.
What is 3?