Exam 9: Mass and Mass-Related Parameters

The physical quantity of momentum has

Which has the greater momentum; a motorcycle that weighs 2400 N moving at a speed of 8 kmph a bullet that weighs 4 N moving at a speed of $900 \mathrm {~m} / \mathrm { s }$

The SI unit for density is a. $g / \mathrm { cm } ^ { 3 }$ b. $g / \mathrm { ml }$ c. $\mathrm { kg } / \mathrm { liter }$ d. $k g / m ^ { 3 }$

What happens to the mass of a marshmallow when squeeze it?

What happens to the density of a marshmallow when squeeze it?

The closer the mass is located to the center of rotation, the harder it is to rotate the mass about the given center of rotation.

A $\text { A } 600 \mathrm {~kg} \text { car is traveling at } 30 \mathrm {~m} / \mathrm { s } \text {. What is its momentum? }$

What is the momentum of a $2 \mathrm {~kg}$ hockey puck that slides at $20 \mathrm {~m} / \mathrm { s }$ across an icy lake? a. $0.1 \frac { \mathrm { kg \cdot} m } { \mathrm {~s} }$ b. $10 \frac { \mathrm { kg \cdot} m } { \mathrm {~s} }$ c. $40 \frac { \mathrm { kg \cdot} m } { \mathrm {~s} }$ d. None of the above

The ratio of an object's volume to its mass is

The SI unit for specific gravity is a. $g / \mathrm { cm } ^ { 3 }$ b. $g / \mathrm { ml }$ c. $\mathrm { kg } / \mathrm { m } ^ { 3 }$ d. unitless

A measure of how hard it is to rotate something with respect to its center of rotation is called

A truck and a motorcycle are moving with the same momentum.Which has the greater kinetic energy?

An aluminum cylinder is 5cm long and has a mass of 42g .If aluminum has a density of $2700 \mathrm {~kg} / \mathrm { m } ^ { 3 }$ , how long is the cylinder? a. $1 \mathrm {~cm}$ b. $2 \mathrm {~cm}$ c. $3 \mathrm {~cm}$ d. $4 \mathrm {~cm}$

The SI unit for specific weight is a. $\mathrm { kg } / \mathrm { m } ^ { 3 }$ b. $\mathrm { N } / \mathrm { m } ^ { 3 }$ c. Newtons d. Unitless

A rectangular block of aluminum has the following dimensions: $25 \mathrm {~mm} \times 25 \mathrm {~mm} \times 150 \mathrm {~mm}$ The density of aluminum is $2700 ^ { \mathrm { kg } } / \mathrm { m } ^ { 3 }$ .How much does the block of aluminum weigh? a. $2.5 \mathrm {~N}$ b. $5 \mathrm {~N}$ c. $7.5 \mathrm {~N}$ d. $10 N$

What does L stand for in the following equation: $L = m v$

It takes 20 seconds to fill a two-liter bottle with water from your kitchen faucet.What is the mass flow rate from the faucet if water has a density of $1000 ~ { \mathrm { kg } } / \mathrm { m } ^ { 3 } ?$ a. $1 ~ { \mathrm { kg } } / \mathrm { sec }$ b. $0.1 \mathrm {~kg} / \mathrm { sec }$ c. $0.01 ~ { \mathrm { kg } } / \mathrm { sec }$ d. $1 \mathrm {~g} / \mathrm { sec }$

The farther away the mass is located from the center of rotation, the harder it is to rotate the mass about the given center of rotation.

The ratio of an object's mass to its volume is