All categories

4 years ago

If an object accelerates from rest, with a constant acceleration of 6.4 m/s2, what will

Physics

1 answer:

adell [148]4 years ago

3 0

Answer:

120 m/s

Explanation:

Acceleration = 6.4 m/s²

Initial velocity = 0 m/s

Time = 18 s

v = at + v₀

v = (6.4)(18) + 0

v = 115.2

Rounded to two significant figures, the final velocity is 120 m/s.

You might be interested in

Suppose you are standing on the center of a merry-go-round that is at rest. You are holding a spinning bicycle wheel over your h

ioda

Answer:

B. It begins to rotate counterclockwise

Explanation:

It can happen that the merry-go-round remains at rest in the case when the person is standing on the axle of the merry go round whose axis is fixed to some rigid support, but here the person is standing at the center of the merry-go-round not at the axle hence the according to the conservation of angular momentum. Angular momentum is given as:

$L=I.\omega$

for the conservation of momentum

$I.\omega=I'.\omega'$

where:

$I=$ moment of inertia of the merry-go-round

$\omega=$ angular velocity of the merry-go-round

$I'=$ moment of inertia of the bicycle wheel

$\omega'=$ angular velocity of the wheel

As the person tries to stop the wheel which is rotating then the person feels an opposing force which tries to moves the whole system in its direction.

6 0

3 years ago

Gold has a specific heat of 129 J/kg°C. How many joules of heat energy are required

ikadub [295]

To raise 1 kg by 1C, it will take 129 joules.

To raise 0.015 kg by (85-22)C, it will take (129*0.015)*22 = 42.57 joules.

6 0

4 years ago

When a plant is entering the calvin cycle of photosythesis______.

Korolek [52]

The Calvin cycle<span> refers to the light-independent reactions in photosynthesis that take place in three key steps. Although the </span>Calvin Cycle<span> is not directly dependent on light, it is indirectly dependent on light since the necessary energy carriers (ATP and NADPH) are products of light-dependent reactions.

So basically it indirectly needs the light, even it's called light-independant reaction.

So the answer is the last one.</span>

5 0

4 years ago

Read 2 more answers

After driving a portion of the route, the taptap is fully loaded with a total of 25 people including the driver, with an average

alexira [117]

Answer:

Incomplete Question

Explanation:

String constant is not stated

I'll solve this in a general way.

At the end of my explanation, I'll assume any value for string constant.

The total weight on the taptap : Weight of people + Weight of goats + Weight of chickens + weight of banana

= (25 * 66) + (3 * 15) + (5 * 3) + 25 = 1735 kg

The gravitational force exerted on the taptap

Fig = m*g

where m = the total mass 1735kg

and g = 9.8m/s²

Hooke's law of Elasticity states that

Fs = Kx

Where Fs = spring force

k = spring constant

x = spring stretch or compression

Since Fs = Fg

So, Kx = mg

Make x the subject of the formula

x = mg/k --------------- This is the general way of solving for spring compressor in cases like this

I'll replace m and g with their values, respectively.

Because, the spring constant (k) is omitted in the question, I'll assume it to be 30000

x = 1735 * 9.8/30000

x = 17003/30000

x = 0.566767 metres

x = 0.57 metres ------------- Approximated

In conclusion, the spring compression is 0.57 metres if the spring constant is 30000

6 0

3 years ago

A spectroscope:

svetoff [14.1K]

Answer:

Option A

Measures light from distant objects

Explanation:

A spectroscope is used to measure the use of light from a distant object to work out the object is made of.

It could be the single-most powerful tool astronomers use.

Professor Fred Watson from the Australian Astronomical Observatory says that "It lets you see the chemicals being absorbed or emitted by the light source"

3 0

3 years ago