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dalvyx [7]
3 years ago
8

which of the following are true for gravity? check all that apply. a. gravity is the force that holds objects on the surface of

the earth. b. the force of gravity is stronger for objects with more mass. c. as the distance between two objects increases, the force of gravity between them increases. d. gravity is an attractive force, so it pushes all objects apart.
Physics
2 answers:
Pani-rosa [81]3 years ago
8 0
I believe answer the only correct answer is A. Only from thinking of how gravity works with the natural world around us. Plus answer d doesnt makes sense, and c is false. And lastly if you throw a bowling ball and soccer ball over a bridge at the same time, they will fall at the same rate, only thing that would delay them is if one had more air resistance than the other.
klemol [59]3 years ago
8 0

The correct answer to the question is : A) Gravity is the force that holds objects on the surface of the earth and B) The force of gravity is stronger for objects with more mass.

EXPLANATION:

Before coming into any conclusion, first we have to understand the force of gravity.

Gravity is the force with which any body on the surface of earth is attracted towards the centre of earth.

Actually it is the gravitational force which is known as gravity in the context of earth.

The nature of the force is attractive in nature. That's why every body is attracted towards the centre of earth.

The force of gravity experienced by a body on the surface of earth is equal to its weight.

Hence, gravity = mg.

Here, g is known as acceleration due to gravity.

A body having greater mass will feel more gravity as gravity is dependent on the mass of the body.

We know that gravity is the gravitational force. Hence, it will obey inverse square law. Hence, gravitational force decreases with the increase in distance of separation between two bodies.

Hence, the correct answer of this question is option A and B.

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Coherent light with wavelength 598 nm passes through two very narrow slits, and the interference pattern is observed on a screen
Stella [2.4K]

Answer:

1.196 μm

Explanation:

D = Screen distance = 3 m

\lambda = Wavelength = 598 m

y = Distance of first-order bright fringe from the center of the central bright fringe = 4.84 mm

d = Slit distance

tan\theta=\frac{y}{D}\\\Rightarrow \theta=tan^{-1}{\frac{y}{D}}\\\Rightarrow \theta=tan^{-1}{\frac{4.84\times 10^{-3}}{3}}\\\Rightarrow \theta=0.09243\ ^{\circ}

sin\theta=\frac{\lambda}{d}\\\Rightarrow d=\frac{\lambda}{sin\theta}\\\Rightarrow d=\frac{598\times 10^{-9}}{sin0.09243}\\\Rightarrow d=0.00037066\ m

For first dark fringe

dsin\theta=\frac{\lambda'}{2}\\\Rightarrow \lambda'=2dsin\theta\\\Rightarrow \lambda'=2\times 0.00037066\times sin0.09243\\\Rightarrow \lambda'=1.196\times 10^{-6}\\\Rightarrow \lambda'=1.196\ \mu m

Wavelength of first-order dark fringe observed at this same point on the screen is 1.196 μm

3 0
3 years ago
If ice has a density of.92g/cm, what is the volume of 1.8 kilograms of ice?
steposvetlana [31]
Given:
Density = .92 g / cm³
Volume = 1.8 kg
            = (1.8 * 1000) grams
            = 1800 grams
Now,
Density (d) = \frac{Mass (m)}{volume(v)}

volume (v)= \frac{mass(m)}{density(d)}

volume (v)= \frac{1800}{.92}

volume (v)= 1956.521739

volume (v)= 1956.5~ cm^{3}

So, the volume of 1.8 kg of ice is 1956.5 cm³

5 0
3 years ago
A 2.00 kg block hangs from a spring balance calibrated in Newtons that is attached to the ceiling of an elevator.(a) What does t
tresset_1 [31]

Answer:

Part a)

Reading = 2.00 kg

Part b)

Reading = 2.00 kg

Part c)

Reading = 4.04 kg

Part d)

from t = 0 to t = 4.9 s

so the reading of the scale will be same as that of weight of the block

Then its speed will reduce to zero in next 3.2 s

from t = 4.9 to t = 8.1 s

The reading of the scale will be less than the actual mass

Explanation:

Part a)

When elevator is ascending with constant speed then we will have

F_{net} = 0

T - mg = 0

T = mg

So it will read same as that of the mass

Reading = 2.00 kg

Part b)

When elevator is decending with constant speed then we will have

F_{net} = 0

T - mg = 0

T = mg

So it will read same as that of the mass

Reading = 2.00 kg

Part c)

When elevator is ascending with constant speed 39 m/s and acceleration 10 m/s/s then we will have

F_{net} = ma

T - mg = ma

T = mg + ma

Reading is given as

Reading = \frac{mg + ma}{g}

Reading = 2.00\frac{9.81 + 10}{9.81}

Reading = 4.04 kg

Part d)

Here the speed of the elevator is constant initially

from t = 0 to t = 4.9 s

so the reading of the scale will be same as that of weight of the block

Then its speed will reduce to zero in next 3.2 s

from t = 4.9 to t = 8.1 s

The reading of the scale will be less than the actual mass

3 0
3 years ago
Why do i lose at corn hole
aivan3 [116]

Answer:

Maybe because you not throwing it stringer or lighter. And you need to control yourself prob. maybe you did line it correctly or maybe your just bad to be honest. -.-

Explanation:

8 0
3 years ago
Read 2 more answers
When you step on the accelerator to increase the speed of your car, the force that accelerates the car is: A. the force of your
Dmitry [639]

Answer:

B. the force of friction of the road on the tires

Explanation:

Unless the car engine is like jet engine, the main force that accelerates the car forward is the force of friction of the road on the tires, which is ultimately driven by the force of engine on the tires shaft. As the engine, and the shaft are part of the system, their interaction is internal. According to Newton laws of motion, the acceleration needs external force, in this case it's the friction of the road on the tires.

6 0
3 years ago
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