The equation for the acceleration of a body moving in a circle is , where a is acceleration, v is velocity and r is the radius of the circle. acceleration has units of m/.

a. what is the acceleration of a body moving with a velocity of 30 m/s in a circle of radius 10 m?

b. solve the equation for velocity

c. what is the velocity of a body that has an acceleration of 20 m/ and is moving in a circle of radius 2 m?

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force