Does dna have a positive or negative charge?

The following reaction is an example of a base reacting with water: NH3 + H2O → H3O + NH4+ True False

A 4 kg car with frictionless wheels is on a ramp that makes a 25° angle with the horizontal. The car is connected to a 1 kg mass by a string that passes over a frictionless pulley. What is the acceleration of the car?

A 3.5 kg book is sitting at rest on a table. what is the value of the normal force being exerted by the table on the book?

The Behavioral Science Unit (BSU) is a part of what agency?

A lump of clay whose rest mass is 4 kg is travelling at three-fifths the speed of light when it collides head-on with an identical lump going the opposite direction at the same speed.

Witch types of electromagnetic waves have wavelengths that are longer than those of visible light but shorter than those of microwave?

Temperature is the transfer of thermal energy from one object to another.

Describe how handball players move the ball

What is measuring the age of fossils in years called

A wire 0.80m long carrying a current of 3.2A is perpendicular to a 0.15T magnetic field (B field). What is the force on the wire? (Use F=BIL to solve!) Input answer with 3 decimal places (for example: 555) and do NOT include the units! E