A 45.0 kg ice skater needs a 25 N horizontal force to get moving on a smooth ice surface. What is the coefficient of friction between the ice and the skates?

a. 1.80

c. 0.18

b. 0.057

d. 0.56

A friend talks to you as she walks past you at a speed of 2.25 m/s. why do you not notice a Doppler shift in her voice as she passes?

Compared to the charge on a proton, the amount of charge on an electron is, Less and has the opposite sign Or Same and has the opposite sign Or Less and has the same sign Or Same and has the same sign

If the resistance of an electric circuit is 12 ohms and the voltage in the circuit is 6 ov, the current flowing through the circuit is

U are asked to measure the amount of liquid held in a sports drink bottle. which is an appropriate unit of measurement? is grams, mililiters, milligrams or centimeter

The zone of earthquakes and volcanoes surrounding the pacific ocean is called

Tsunami waves are almost the same as ripples caused by throwing a rock into a pond. what is the major difference between the two?

A hot air balloon pilot wants the balloon to quickly rise several feet higher so it will be above some trees in the distance. Which best explains how the pilot can make the balloon rise? 1.

The density of pine is generally about 0.5 g/cm3. What is the mass of a 800 cm3 piece of pine Download pdf

The heat energy released or absorbed by a chemical reaction is generally determined by the difference between the energy that

A woman with a mass of * kg is standing on the rim of a large disk that is rotating at an angular velocity of 0.550 rev/s about an axis through its center. the disk has a mass of * kg and a radius of * m.