A roller coaster is traveling at 13 m/s when it approaches a hill that is 400 m long. Heading down the hill, it accelerates at 4.0 m/s2. What is the final velocity of the roller coaster? Round your answer to the nearest whole number.

According to universal gravitation, both mass and air resistance affect the gravitational attraction between objects

Consider a cylindrical nickel wire 1.6 mm in diameter and 2.5 * 104 mm long. Calculate its elongation when a load of 320 N is applied.

Which of the following can influence one's ability to detect stimuli and increase one's responsiveness to stimuli in dangerous situations? A. stimuli criteria B. response criteria C. difference threshold D. detection threshold

Which is the best term to describe a chemical reaction in which the reactants have more potential energy than the products? A. Thermal conductor B. Endothermic C. Exothermic D. Thermal insulator

How long would it take a spaceship to travel one light year

An engineer uses aluminum to build an airplane rather than composite materials that are lighter and stronger. He does this because he is concerned about the composite materials and how suddenly they can fail. This is an example of:

Teresa wanted to test the effects of liquid density on the speed of sound waves. what is the dependent variable in her experiment?

A proton (mass = 1.67*10-27 kg, charge = 1.6*10-19 C) travelling with speed 1*106 m/s enters a region of space containing a uniform magnetic field of 1.2 T. What is the time t required for the proton to re-emerge into the field-free region? t =

A scientific_ is a rule used to discribe a pattern seen in nature not an examplanation of why that patten might occur

A beaker contains 450g of water at a temperature of 24C, The therman capacity of the beaker is negligible and no heat is gained by, or lost to, the atmosphere.