Un fir, de sectiune S = 5 mm patrati si lungime L0 = 32 cm, este intins de o forta. Stiind ca E = 3 * 10 la put 7 N/m patrat, sa se calculeze constanta elastica k a firului.

State and explain newton's second law of motion.

Define heterogeneous mixture and list two examples.

1. third law Every applied force is opposed by an equal force. 2. second law A force must be applied to change an object's velocity. 3. first law Acceleration is affected by mass.

20. Which of the following is an accurate statement? A. DC generators produce current with a voltage that changes from positive to negative B. AC generators produce current that's pulsating but always remains positive, C.

A solid cylinder of mass m and radius R rolls down a ramp, starting from rest at a height h above a nearby horizontal surface.

Which term defines the energy of motion? a. chemical energy b. electrical energy c. gravitational energy d. kinetic energy user: what is electromagnetic energy that travels in transverse waves? a. nuclear energy b. potential energy c.

The mass of a lift is 600kg. the maximum tensile force that the cable supporting the lift can withstand is 7kN. Calculate:maximum upwards acceleration allowed?

In an experiment if doubling the manipulated variable results in doubling of the responding variable the relationship between the variable is a (n) ?

What color does Indigo turn things?

Why is temperature a good criterion for searching for earth like exoplanets