How do most primary producers make their own food?

What is the current in a series circuit with a resistance of 30 ohms and a potential difference of 120 volts?

How does the sun transmit energy from millions of miles away into the Earth system? 'Energy' and 'power' are often confused, but aren't the same.

What affects tides in addition to the sun and the moon

A rocket sled for testing equipment under large accelerations starts at rest and accelerates according to the expression a = (3.6 m/s 3) t + (5.6 m/s 2). How far does the sled move in the time interval t = 0 to t = 1.6 s? Answer in units of m.

The acceleration of an object depends upon its mass and the net force acting upon it. its mass and volume. its speed and direction. its volume and the net force acting on it.

Plaskett's binary system consists of two stars that revolve in a circular orbit about a center of mass midway between them. This statement implies that the masses of the two stars are equal (see figure below).

Is mercury (the planet) rocky or gaseous (meaning relating to or having the characteristics of a gas.)

What does one prolonged blast emitted by boat a using an efficient sound producing device indicate?

Feng and Isaac are riding on a merry-ground. Feng rides on a horse at the outer rim of the circular platform, twice as far from the center of the circular platform as Isaac, who rides on an inner horse.

Alice did an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects the light. She placed a ray box in front of a mirror.