Measurements
Using the correct number of Sig Figs, solve this operation with Scientific Notation.
(8.44x103cm)+(2.5x103cm)
1.1x104cm
An 8N force is applied to a 2kg object causing it to accelerate. Determine the acceleration of the object.
A 1,200-kilogram car traveling at 10 meters per second hits a tree and is brought to rest in 0.10 seconds. What is the magnitude of the average force acting on the car to bring it to rest?
1.2x105N
The work done in accelerating an object along a frictionless horizontal surface is equal to the change in the object's
Metal sphere A has a charge of -2 units and an identical metal sphere, B, has a charge of -4. If the spheres are brought together into contact with each other and then separated the charge on sphere B will be.
-3 units
1.46um= how many cm
*solve in scientific notation*
1.46x10-4
A cart is uniformaly accelerating from rest. The net froce acting on the cart is.
Constant but not zero
Ball A of mass 5.0 kilograms moving at 20 meters per second collides with ball B of an unknown mass moving at 10 meters per second in the same direction. After the collision, Ball A moves at 10 meters per second and ball B at 15 meters per second. Both still in the same direction. What is the mass of ball B?
10 Kg
A motor used 120 watts of power to raise a 15-newton object in 5.0 seconds. Through what vertical distance was the object raised?
40m
A metal sphere has a net negative charge of 1.1x10-6 coulomb. Apporxitmaley how many more electrons than protons on the sphere.
6.9x1012
what is the value of the SI prefix milli
10-3
Compared to the inertia of a 0.10 kilogram steel ball, the inertia of 0.20 kilogram styrofrom ball is.
twice as great.
An 8.0-kilogram ball is fired horizontally from a 1.00 x103 kilogram cannon initially at rest. After having been fired the momentum of the ball is 2.40x103 Kilogram meters per second east. Calculate the magnitude of the velocity of the cannon after the ball is fired.
-2.4m/s
A small electric motor is used to lift a 0.50-kilogram mass at a constant speed. If the mass is lifted at a vertical distance of 1.5 meters in 5.0 seconds, the average power developed by the motor is.
1.5W
A positively charged glass rod attracts object X. The net charge of object X may be
zero or negative
The value of Pi is known as 3.141592654. express the value of Pi using 5 significant figures.
3.1416
An unbalanced force of 10 newtowns north acts on a 20.0 kilogram mass for 5.0 seconds. Calculate the acceleration of the mass.
.5m/s2
A woman with horizontal velocity v1 jumps off a dock into a stationary boat. After landing, the woman and the boat move with velocity v2. Compared to velocity v1 velocity v2 has.
smaller magnitude and the same direction.
What is the power output of an electric motor that lifts a 2.0-kilogram block 15 meters vertically in 6.0 seconds?
49W
0.9N
determine the order of magnitude. 5.73x1032
1033kg
Sand is often placed on an icy road because the sand
decreases the coefficant of friction between the tires of a car and the road.
On a snow-covered road, a car with a mass of 1.1x103 kilograms collides head-on with a van having a mass of 2.5x103 kilograms traveling at 8.0 meters per second. As a result of the collision, the vechiles lock together and immediately come to rest. Calculate the speed of the car immediately before the collision.
18.2m/s
An escalator is used to move 20 passengers every minute from the first floor of a department store to the second. The second floor is located 5.20 meters above the first floor. The average passenger's mass is 54.9 kg. Determine the power requirement of the escalator in order to move this number of passengers in this amount of time.
933 W
The magnitude of the electrostatic force between two point charges is F. if the distance between the charges is doubled the electrostatic force between the charges will become.
F/4