Please help I’m really stuck:/ 1. Use the equation weight = mg to find the weight of a 45 kg child.
2. Find the speed of a caterpillar that crawls a distance of 6.0 cm every
2.0 seconds. The equation for speed is v=d/t.
3. The circumference of a circle equals 2 mr, where r is the radius. Find
the circumference of a compact disc that has a radius of 6.0 cm.
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HOLT SCIENCE SPECTRUM

Plz mark brainliest 30 points 1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.