Name that measurement
What is the value of a "mili"
10-3
A ball was dropped from a tall building. What happens to the magnitude of the acceleration and the speed of the ball as it falls?
Acceleration remains the same and speed increases.
Is speed a Scalar or Vector quality?
Scalar Quality
If the sum of all the forces acting on a moving object is zero, the object will
continue moving with constant velocity
As the number of resistors in a parallel circuit is increased, what happens to the equivalent resistance of the circuit and total current in the circuit?
Equivalent resistance decreases and total current increases.
Perform the operation and express answer in scientific notation
(4.37)(6.645)
29.0
Which unit is equivalent to a newton per kilogram?
m/s2
What is the formula for momentum?
p=mv
The watt∙second is a unit of?
Power
A 3.6-volt battery is used to power a television for 5 minutes. If the television uses 0.064 watt of power, what is the current that passes through the television?
0.018A
What is the value of a "pico"
10-12
A 15-kilogram box is at rest on a horizontal surface. A 5-kilogram cart is placed in the cart. Compared to the mass and inertia of the box, the cart-box system
more mass and more inertia
At the circus, a 100-kilogram clown is fired 15 meters per second from a 500-kilogram cannon. What is the recoil speed of the cannon?
5.0 m/s
Which quantity is a vector?
1)power 2)speed 3)impulse 4)time
3)impulse
What is the total current in a circuit consisting of six operating 100 watt light bulbs connected in parallel to a 120 volt source?
5A
How many significant figures are in 76.45x1015
4 sig figs
A rock dropped from a bridge, it takes 3.1 seconds to hit the ground. How far is the bridge from the ground?
47m
The momentum of an object is in the same direction as its
velocity
A lift that uses a motor is used to lift a 0.50-kilogram cube with a constant speed. If the cube is lifted a vertical distance of 1.5 meters in 5.0 seconds, the average power developed by the lift is
1.5W
What is current electricity?
the continuous flow of charges
Convert 64.1 cm to km in correct scientific notation
6.41x10-5
A sphere dropped from rest on a ledge falls freely until it hits the ground with a speed of 20 m/s. The time during which the sphere is in free fall is approximately
2s
The product of an object's velocity and mass is called?
momentum
The total work done in lifting a typical high school history textbook a vertical distance of 0.10 meter is approximately
1.5J
At 20°C, four conducting wires made of different materials have the same length and the same diameter. Which wire has the least resistance?
1)gold 2)aluminum 3)tungsten 4)nichrome
1)gold