2 kg of iron at 80°C is placed in a copper can, mass 0.5 kg, containing 1 kg of water at 20°C. After stirring, the temperature of the mixture is 30°C. Calculate the specific heat capacity of iron.

Describe 3 ways you could change your velocity when riding a bicycle.

What type of energy is released when fossil fuels are burned? a. electrical energy b. nuclear energy c. kinetic energy d. chemical energy

White dwarfs are too small to see with telescopes true or false

Two children stretch a jump rope between them and send wave pulses back and forth on it. The rope is 4.5 m long, its mass is 0.42 kg, and the force exerted on it by the children is 71 N.

Which is the correct order of materials in terms of reflectivity, from least to greatest? brown soil, beige sand, white paper, black asphalt white paper, beige sand, brown soil, black asphalt black asphalt, brown soil, beige sand, white paper beige

An electric circuit consists of a variable resistor connected to a source of constant potential difference. If the resistance of the resistor is doubled, then

What would happen if an electron was added to an atom

Is a stick living, non living or Dead?

A ball player catches a ball 3.24 s after throwing it vertically upward. With what speed did he throw it?

Most metallic ores are produced by which two of processes? a) Metamorphic and Sedimentary b) Igneous and Metamorphic c) Igneous and Sedimentary d) Cementation and Compaction