An object with a mass of 10 kg lies on a horizontal surface with friction with a coefficient of static friction of 1.32 and a coefficient of kinetic friction of 0.66. A force of 25 N is applied to it DOWNWARDS, perpendicular to the surface, a force of 13 N is applied to it at an angle of 30 degrees above the horizontal. If another force of 20 N is applied in the x direction, parallel to the surface, what is the amount, or magnitude, of friction acting on the mass, in Newtons

On a cold day, when the air temperature is 0°c, you empty your lungs and take a deep breath, filling your lungs with 4.2 l of air. if you hold your breath until the temperature of the air in your lungs reaches 37°c, what is the volume of the air in your lungs at that point, assuming the pressure does not change?

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. (refer to the walk-through video to locate the online lab within the online textbook).