A scientist is conducting research to determine how much pressure a dam can withstand. Why are good observations important to his research?
Answers
The things that a scientist should consider while observing the force is the environmental conditions,the force that is expected to act on the dam, the means to contain that force, and compare different types of designs in accordance with the location of the dam
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What is capacitance?
Could someone please explain isotopes, and what they do/are? If not thats fine, thank you
Dark energy is an unexplained force that is causing _____. stars to explode the expansion of the universe to accelerate the universe to contract galaxies to group together
The cloud of interstellar dust and gas that forms a star is known as a A. protostar.B. white dwarf.C. red giant.D. nebula.User: 15. With an average surface temperature of about 737 K, _______ is the hottest planet. A. MarsB. MercuryC. EarthD. Venus
Answers
Answer:
The mass of the dog food added is 9.03 kg
Explanation:
Given;
mass of the shopping cart, m₁ = 14.5 kg
let the mass of the bag added = m₂
the force applied, F = 12 N
initial velocity of the cart-bag system, u = 0
distance traveled by the system, d = 2.29 m
time of motion of the system, t = 3.0 s
The acceleration of the system is calculated as;
The total mass of the system (M) is calculated as follows;
F = Ma
M = F/a
M = (12)/(0.51)
M = 23.53 kg
The mass of the dog food added is calculated as;
m₂ = M - m₁
m₂ = 23.53 kg - 14.5 kg
m₂ = 9.03 kg
b. elliptical
c. epicyclic
d. continuously changing
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The planets move in elliptical orbits round the Sun.
Answer:
B) elliptical
Explanation:
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Answer:
The work done and power are 60000 Pounds-feet and 3000 Pounds-feet/sec.
Explanation:
Given that,
Force F = 1500 pounds
Distance d = 40 feet
Time t = 40 sec
Work done :
The work done is the product of the force and distance.
The work done is defined as,
Where, W = work
F = force
d = distance
Put the value into the formula of work
Power:
The power is equal to the work done divided by time.
The power is defined as,
Where, P = power
W = work
t = time
Put the value into the formula of power
Hence, The work done and power are 60000 Pounds-feet and 3000 Pounds-feet/sec.
power = w/t = (1500 x 40) / 20
Answers
Potential energy, unlike kinetic, is stored energy. This energy comes from different sources. An object with potential energy also has the ability to produce energy if something triggers it. Example, a charged battery, a car on top of a hill, and capacitors.
Answers
Answer:
10 seconds
Explanation:
Hope this is right and that it helps.
You see if the skier is going 250 meters a second 250 times 10 is 2500 so it would take the skier 10 seconds.
Answer:
10 sec.
Explanation:
distance = 2500 meters
velocity = 250 meter/second
time = distance / velocity
= 2500 meters
250 meter/second
= 10 sec.
Answers
The velocity of the package just before it hits the ground is 16.7 m/s.
What is velocity?
The change of distance with respect to time is defined as speed. Speed is a scalar quantity. It is a time-based component. Its unit is m/sec.
Initial velocity(u)=2 m/s
V(velocity of hitting)=?
S(distance travelled)= 14 meters
The velocity of the package just before it hits the ground is found as;
From the Newton's third equation of motion;
v²=u²+2as.
v²=(-2)²+2(9.81)(14)
v=16.7 m/s
Hence,the velocity of the package just before it hits the ground is 16.7 m/s.
To learn more about the velocity, refer to the link;
#SPJ2
Taking downwards as positive, use v²=u²+2as.
v²=(-2)²+2(9.81)(14)
v=16.7 m/s