The position vector for a particle moving on a helix is c (t) = (cost, sint, t^2). Find the speed of the particle at time t = 4pi

Identify which stage marks the birth of a star

A roller coaster car crosses the top of a circular loop-the-loop at twice the critical speed. What is the ratio of the normal force to the gravitational force?

What is a characteristic of a solid? A. It is a substance which will always hold its shape. B. It is a substance which is unable to hold its shape. C. It is always a homogenous mixture. D. It is always a heterogeneous mixture.

A child rides a bicycle in a circular path with a radius of 2.0 m. The tangential speed of the bicycle is 2.0 m/s. The combined mass of the bicycle and the child is 43 kg. What is the magnitude of the bicycle's centripetal acceleration? a. 1.

You are trying to determine the specific gravity of an unknown liquid. If m is the mass of a solid object, mL is the object's apparent mass in the unknown liquid, and mA is the apparent mass of the object in water, what is the formula for the

A decaliters how many times larger than 1 million

Heat will flow from a hot object to a cold object until the objects reach

What kind of animals might benefit from a locust swarm

A capacitor is storing energy of 3 Joules with a voltage of 50 volts across its terminals. A second identical capacitor of the same value is storing energy of 1 Joule. What is the voltage across the terminals of the second capacitor?

The monochromatic light diffracts on the two slits which are 0.1 mm apart (their size is negligible) and produces an interference pattern on the wall which is 3 m far from the apparatus.