Physics Measurements Level: High School
Which of the following has three significant figures ?a) 1.00081 kg
b) 0.0500 mm
c) 305.0 cm
d) 8.0600 m
Physics Kinematics Level: High School
Relative Velocity
A train traveling at 50.0 km/h approaches another train moving toward the first at 90.0 km/h . if they are 35 km apart ( on a straight track) how long does it take before they meet ?
Physics Kinematics Level: High School
One dimensional
An arrow is short vertically upward . Three seconds later , it is at a height of 35 m . What was the initial speed of the arrow ?
Physics Kinematics Level: High School
One dimensional
A car with an initial velocity of 3.5 m/s coasts with the engine off and the transmission in neutral . If the combined effect of air resistance and rolling friction causes a constant deceleration of 0.50 m/s2 , after how long a time will the car come to a stop ?
Physics Kinematics Level: High School
One dimensional
You can determine the speed of the car by measuring the time it takes to travel between mile markers in highway . How many seconds should elapse between two consecutive mile markers if the car’s average speed is 65 mi/hr ? What is the car’s average speed if it takes 65 s to travel between the mile markers ?
Physics Measurements Level: High School
Approximately 118 mi wide and 307 mi long and averaging 279 ft in depth , Lake Michigan is the second largest Great lake by volume . Estimate its volume of water in m3 . (Note that 2.54 cm = 1 inch and 5280 feet = 1 mile )
Physics Kinematics Level: High School
A student has a car that gets , on average , 25.0 mi/gal of gasoline . She plans to spend the a year is Europe and take the car with her . What should she expect the car’s average gas mileage to be in kilometers per liter ?
Physics Units Level: High School
One student using unit analysis , says that the equation v = ax is dimensionally correct . Another says it isn’t . With whom do you agree , and why ? In the equation , v is velocity , a is acceleration , and x is distance .
Physics Force & Laws Of Motion Level: High School
Third Law of Motion
For each of the following intersections , identify the action and reaction forces .a) A hammer and a nail
b) Earth’s gravity pulls down on a book
c) A helicopter blade pushes air downward
Physics Vectors Level: High School
Explain the difference between a vector and a scalar quantity . Give at least two examples of different variables that are vector and scalar quantities .Vector :- A physical quantity which has magnitude as well as direction is called vector . Eg . force, displacement, velocity, acceleration .
Physics Kinematics Level: High School
How does mass affect the rate of acceleration in free fall in air and also in a vacuum ?
Physics Units Level: High School
What are the units of mass and the units of weight for the metric system and the English system ?
Physics Electrostatics Level: High School
Two point charge are separated by 6 cm . the attractive forces between them is 20 N . Find the force between them when they are separated by 12 cm .
Physics Heat & Thermodynamics Level: High School
Principle of Calorimetry
What would the final temperature of 100 g of 20 degrees C water when 100 g of 40 degree C iron nails are submerged in it ?
Physics Properties Of Matter Level: High School
Archimedes Principle
A mountain climber friend with a mass of 80 kg ponders the idea of attaching a helium-filled balloon to himself to effectively reduce his weight by 25% when he climbs . He wonders what the approximate size of such a balloon would be . hearing of your physics skills , he asks you . What answer can you provide , showing your calculations ?