Answer:
it will take him 200secs to run to the shops
(btw 200 seconds is 3minutes and 20secs)
Explanation:
distance = speed x time
time = distance / speed
1200 ÷ 6 = 200
time = 200seconds
hope this helps
brainliest please?
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Answer:Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.
Answer:
9.96 m/s
Explanation:
mass of car, m = 487 kg
radius of track, R = 53.3 m
coefficient of static friction, μ = 0.19
acceleration due to gravity, g = 9.8 m/s^2
let v be the maximum speed so that the car can go without flying off the track.
The formula for the maximum speed is given by
vmax = 9.96 m/s
Answer:
Speed of block after the bullet emerges = 1.5 m/s
Explanation:
Here momentum is conserved.
Initial momentum = Final momentum.
Mass of bullet = 10 g = 0.01 kg
Initial Velocity of bullet = 300 m/s
Mass of block = 1 kg
Initial Velocity of block = 0 m/s
Final Velocity of bullet = 50% of initial velocity. = 150 m/s
We need to find final velocity of block. Let it be v
We have
Initial momentum = 0.01 x 300 + 1 x 0 = 3 kg m/s
Final momentum = 0.01 x 150 + 1 x v = 1.5 + v
Equating
3 = 1.5 + v
v = 1.5 m/s
Speed of block after the bullet emerges = 1.5 m/s
<span>BAKING A CAKE </span>
Chemical
change is a process where a current substance changes or is made into a new
type of substance. Unlike the physical change, which is reversible. Chemical change stays into a its new form. Take for
instance these -physical change- examples, making ice cubes. The process involves solidification or freezing
where the water becomes ice or solid but when it melts back to its original or typical
form with respect to temperature, it’s still water. When the paper is cut into
pieces it isn’t burned or exposed to a stimuli that can trigger immediate
change in its composition. It’s still the same. On the contrary, baking a cake involves
these different compositions or substances –flour, egg, yeast and etc. that is
baked to a cake, a newly formed unified substance of all the included
ingredients.
