Answer:
Mass of B is 10 kg
Explanation:
M1v1a + m2v1b = m1v2a + m2v2b
Let m2 = x
5*20 + x10 = 5*10 + x15
100 + x10 = 50 + x15
50 = x5
X= 10
Mass of B is 10 kg
M1 = mass of A
V1a = initial velocity of A
V2a = final velocity of A
M2 = mass of B
V1b = initial velocity of B
V2b = final velocity of B
Answer:
80m, assuming g=10m/s^2
Explanation:
40m/s will be reduced to 0m/s in 4 seconds. 4 seconds x 40m/s would be 160m up, but you will only get half of that because you decelerate linearly to 0m/s. This leaves you with 4 x 20 = 80m.
Calculate mass of lead:
1.00 cm3 lead x 11.4 g/cm3 = 11.4 g lead on one side of balance
To balance that, one needs 11.4 g of iron on the other pan. Calculate volume of iron to give you 11.4 g:
11.4 g iron x 1 cm3/7.87 g = 1.45 cm3 of iron needed
Brain list please
Answer: Planet A is closer to the Sun and has much greater atmospheric pressure. This suggests that planet A has a thicker atmosphere. Planet A's atmosphere is also mostly made of carbon dioxide, which is a greenhouse gas. This gas retains heat, raising the surface temperature of planet A.
Explanation:
Answer:
so average s= total distance travelled ÷ time taken
so, = 400+257 = 657÷5 = 131 km/h is the average velocity