Why is the mechanical advantage of a bottle opener always greater than 1?

If a projectile is fired with an initial velocity of v0 meters per second at an angle α above the horizontal and air resistance is assumed to be negligible, then its position after t seconds is given by the parametric equationsx = (v0 cos α) t y =

Which of the following are examples of a force? (choose as many as apply) (A.) friction (B.) weight (C.) speed (D.) acceleration

Explain how a metamorphic rock that has a pattern of bands was formed

Unlike programmed decisions, nonprogrammed decisions are: a. based on predetermined rules regarding the decision-making process. b. relatively unstructured and occur much less often. c. relatively structured and recur with high frequency. d.

A sound wave has a frequency of 450,000 Hz. What is the wavelength?

Light from the sun travels through space to Earth's atmosphere. Which will light waves do when they move from empty space into matter made up of different gases? A. move at the same speed B. move faster as they transmit C. slow down and refract D.

A 12.5 kg box sliding on a frictionless flat surface tuns into a fixed spring which compresses at a distance x = 14.1 cm. the spring constant is 94.5 kN/m Find the initial speed of the box

An earth scientist who studies hydrosphere

In 1991 four English teenagers built an eletric car that could attain a speed of 30.0m/s. Suppose it takes 8.0s for this car to accelerate from 18.0m/s to 30.0m/s. What is the magnitude of the car's acceleration?

A capacitor with a capacitance of 490 μf is charged to a voltage of 260 v. then a wire is connected between the plates. how many joules of thermal energy are produced as the capacitor