What is one difference between water and ice?

If a green ball has a greater momentum than an orange ball and both balls are moving at the same velocity, then _________.

lubasha [3.4K]

If a green ball has a greater momentum than an orange ball and both balls are moving at the same velocity, then _________.

A. The green ball has a greater mass

<u>Momentum = mass x velocity.</u>

3 0

3 years ago

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if pete (mass =90.00kg) weighs himself and finds that he weighs 30.0 pounds, how far away from the earth is he?

Svet_ta [14]

Here we know that mass of the person is 90 kg

His weight is given as 30 lbf

so here we can convert it into Newton as we know that

1 lbf = 4.45 N

Now from above conversion

$30 lbf = 30 \times 4.45 = 133.45 N$

now we can use this to find the gravity at this height

$mg = 133.45$

$90\times g = 133.45$

$g = 1.49 m/s^2$

now we know that with height gravity varies as

$g' = g(\frac{R}{R+H})^2$

$1.49 = 9.8(\frac{6.37\times 10^6}{6.37\times 10^6 + h})^2$

$h = 1.0 \times 10^7 m$

so above is the height from the surface of earth

4 0

3 years ago

Ball A is dropped from the top of a building of height h at the same instant that ball B is thrown vertically upward from the gr

bixtya [17]

I would answer but it is too long

7 0

3 years ago

2. If a police car drives at a constant speed of 30 km/h, how long will it take to travel a

Natasha_Volkova [10]

Explanation:

Time = Distance/Speed

= 96km / (30km/h)

= 3.2h. (Or 3 hours and 12 minutes)

7 0

4 years ago

Potassium is a crucial element for the healthy operation of the human body. Potassium occurs naturally in our environment and th

gregori [183]

Complete Question

Potassium is a crucial element for the healthy operation of the human body. Potassium occurs naturally in our environment and thus our bodies) as three isotopes: Potassium-39, Potassium-40, and Potassium-41. Their current abundances are 93.26%, 0.012% and 6.728%. A typical human body contains about 3.0 grams of Potassium per kilogram of body mass. 1. How much Potassium-40 is present in a person with a mass of 80 kg? 2. If, on average, the decay of Potassium-40 results in 1.10 MeV of energy absorbed, determine the effective dose (in Sieverts) per year due to Potassium-40 in an 80- kg body. Assume an RBE of 1.2. The half-life of Potassium-40 is $1.28 * 10^9$ years.