Which element could not form in the sun and would have to be formed in a supernova?

hydrogen (atomic number 1)

helium (atomic number 2)

oxygen (atomic number 8)

uranium (atomic number 92)

If a box is pushed across a floor with a force of 130N. The frictional force acting between the box and the floor is 30N, over a time period of 5 sec, Determine: 1) What is the net force acting on it?

Which of the following could you measure with a thermometer

A balloon is inflated from 0.0100 l to 0.500 l against an external pressure of 10.00 atm. how much work is done in joules? 101.3 j = 1 l atm

You kick a soccer ball with a speed of 18 m/s at an angle of 43°. How long does it take the ball to reach the top of its trajectory?

A shipn sends out ultrasound that returns from the seabed and is detected after 5 seconds. if the speed of ultrasound through seawater is 1600 m/s what is the distance of the seabed from the ship?

At t = 0 the components of a radio-controlled car's velocity are vx = 0.5 m/s and vy = 1.2 m/s. Find the components of the car's velocity at t = 4.

2) A window washer pulls themselves upward using a bucket pulley apparatus. A) How hard must pull downward to raise herself slowly at a constant speed? B) If she increases this force by 15%, what will her acceleration be?

A star with an original mass of 8 to 25 solar masses will ultimately become a? a) red giant b) white dwarf c) neutron star d) main sequence star

Racewalking involves more impact than running. true false

Why would an object float in water, but sink in rubbing alcohol?