# Posts by Heart

Total # Posts: 16

**physics =)**

thanks! merry christmas

**physics =)**

Ok, thanks a lot! Merry christmas and a happy almost new yr

**physics =)**

A 0.200 kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.100 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 0....

**Physics**

Ok, thanks but i don't understand b. I know you use the equation d = Vit +1/2 at^2 but to find the distance would you just calculate d = vit only.

**physics**

A 0.200 kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.100 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 0....

**physics**

A 0.145 kg baseball is pitched at 42 m/s. The batter hits it horizontally to the pitcher at 58 m/s. GIVEN: m = 0.145 kg v = 42 m/s batter v = 58 m/s a. Find the change in momentum of the ball. p = mv p = (0.145)(42) p = 6.09 --> What velocity would I use? Would i use the ...

**physics**

The Moon's mass is 7.34 x 10^22 kg, and it is 3.8 x 10^8 away from Earth. Earth's mass if 5.97 x 10^24 kg. a. Calculate the gravitional force of attraction between Earth and the Moon. b. Find Earth's gravitional field at the moon. GIVEN: Moon's mass = 7.34 x 10...

**physics**

A 1.25-kg book in space has a weight of 8.35 N. What is the value of the gravitational field at that location? GIVEN: m = 1.25 kg W = 8.35 N Therefore, they want the acceleration. Would I use this equation g = Fg/m?

**general science**

Reactants --> Products {True} products = reactants {True} If atoms cannot be destroyed then the mass of reactants must equal the mass of the products in a chemical reaction Some chemical and physical changes can reach equilibrium. At equilibrium the rate of the forward ...

**Chemistry**

Well, every substance has mass. You can try this out but weighing the vinegar before you add baking soda and weigh the vinegar after you add baking soda.

**physics**

A bike travels at a constant speed of 4.0 m/s for 5.0 s. How far does it go? GIVEN: V = 4.0 m/s t = 5.0 s Would you use this equation? D= Vit + 1/2 at^2

**physics**

A 65 kg diver jumps off of a 10.0 m tower. a. Find the diver's velocity when he hits the water. b. The diver comes to a stop 2.0 m below the surface. Find the net force exerted by the water. Ok, im confused, I found velocity which is 14. But for the net force im confused ...

**physics**

A 65 kg diver jumps off of a 10.0 m tower. a. Find the diver's velocity when he hits the water. b. The diver comes to a stop 2.0 m below the surface. Find the net force exerted by the water. Ok, im a little confused about this problem. We knoe the mass of the diver is 65 ...

**physics =)**

Thanks a lot! I got F = 6311.11 N.

**physics =)**

A race car has a mass of 710 kg. It starts from rest and travels 40.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?

**attack (check)!!!!!**

Bobby: Blood pressure: 120/70 Cardiac output 5.0 Hemoglobin: 5.0 Urine output 5.0 Ken: Blood pressure: 130/80 Cardiac output 5.5 Hemoglobin: 5.5 Urine output 5.5 Penny: Blood pressure: 110/70 Cardiac output 4.9 Hemoglobin: 4.9 Urine output 4.9 Hanna: Blood pressure: 90/65 ...