In a pressure cooker, a lid is screwed tightly onto a pot so that the air pressure in the pot is increased. What effect, if any, will this have on the boiling point of water in the pot?

Answer:

Hype

Explanation:

Yyrru

Answer:

2400 meters

Explanation:

80*30=2400

Answer:

speed=80m/s

time=30s

distance=?

Now,

speed=d/t

80=d/30

d=80×30

d=2400m

Answer:

true

Explanation:

Answer:

gravity interactions

Answer:

The people on the bus fall forward because Newton's Law of Inertia states that and object in motion with stay in motion or an object at rest will stay at rest unless acted in by another force. The force of the bus stopping suddenly caused the passengers to fall forward because they were at rest position.

Answer:

When a ray of light passes through a glass slab of a certain thickness, the ray gets displaced or shifted from the original path. This is called lateral shift/displacement.

Explanation:

.

Answer:

the total kinetic and potential energy of its particles

Explanation:

The energy contained in the small motions of the object's molecules can be broken up into a combination of microscopic kinetic energy and potential energy.

Answer:

power=300watt

Explanation:

Answer:

b

Explanation:

Answer:

B. Vastus Lateralis

Explanation:

The vastus lateralis muscle is located on the side of the thigh. This muscle is the largest of the quadriceps group.

Answer:

Bananas go through a process called ‘negative geotropism’ so they can reach the sun

Answer:

Explanation:

im sorry i coudnty help

Answer:

4.03 m/s/s

Explanation:

d=1/2 a t^2

210 = 1/2 a (10.21)^2

210 = 52.1 a

a = 4.03 m/s/s

Both magnitude and direction. Centripetal acceleration always act towards the center of the circle and have constant value.

"When a body moves in a circular path the acceleration acting towards the center of the circle is called centripetal acceleration." Hence the magnitude and direction will not change.

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#SPJ2

Friction and the applied force are not balanced. The 7 N push is countered by the frictional force of 3 N to push the box with a net force of 4 N.

Answer:

6.8×10^6 m

Explanation:

f = velocity of light/ wavelength

440= 3×10^8 / wavelength

so

wavelength = 3×10^7/ 44

= 6.8×10^6 m

gravitaional pull

not sure

Answer:

0.67m/s²

Explanation:

Given parameters:

Mass of toy  = 1.2kg

Force applied = 0.8N

Unknown:

Acceleration   = ?

Solution:

According to newton's second law of motion;

      Force  = mass x acceleration

Now,

      Acceleration = [tex]\frac{Force}{mass}[/tex]

     Acceleration  = [tex]\frac{0.8}{1.2}[/tex]   = 0.67m/s²

Answer:

force = 0.8 N

mass = 1.2 kg

force

[tex] \boxed{force = m.a}[/tex]

According to Newton's second law of motion

[tex] \boxed{ \bold \pink {\underline{f =m.a}}} [/tex]

where

f= force

m= mass

a= acceleration

substitute the value in the above formula

0.8 = 1.2 × accleration

accleration= 0.8/1.2

acceleration= 0.66 m/sec²

Answer:

v = 11 m/s

Explanation:

Given tha,

Initial speed, u = 5 m/s

Acceleration, a = 1.2 m/s²

Time, t = 5 s

We need to find the final speed of the boat during this time. Let it is v. Using first equation of motion as follows :

v = u +at

Putting all the values, we get :

v = 5 + 1.2(5)

v = 11 m/s

So, the final speed of the boat is 11 m/s. Hence, the correct option is (c).

Answer:It depends on the initial velocity of the projectile and the angle of projection. The maximum height of the projectile is when the projectile reaches zero vertical velocity. ... The horizontal displacement of the projectile is called the range of the projectile and depends on the initial velocity of the object

Answer:

If both the radius and frequency are doubled, then the tension is increased 8 times.

Explanation:

The radial acceleration ([tex]a_{r}[/tex]), measured in meters per square second, experimented by the moving end of the string is determined by the following kinematic formula:

[tex]a_{r} = 4\pi^{2}\cdot f^{2}\cdot R[/tex] (1)

Where:

[tex]f[/tex] - Frequency, measured in hertz.

[tex]R[/tex] - Radius of rotation, measured in meters.

From Second Newton's Law, the centripetal acceleration is due to the existence of tension ([tex]T[/tex]), measured in newtons, through the string, then we derive the following model:

[tex]\Sigma F = T = m\cdot a_{r}[/tex] (2)

Where [tex]m[/tex] is the mass of the object, measured in kilograms.

By applying (1) in (2), we have the following formula:

[tex]T = 4\pi^{2}\cdot m\cdot f^{2}\cdot R[/tex] (3)

From where we conclude that tension is directly proportional to the radius and the square of frequency. Then, if radius and frequency are doubled, then the ratio between tensions is:

[tex]\frac{T_{2}}{T_{1}} = \left(\frac{f_{2}}{f_{1}} \right)^{2}\cdot \left(\frac{R_{2}}{R_{1}} \right)[/tex] (4)

[tex]\frac{T_{2}}{T_{1}} = 4\cdot 2[/tex]

[tex]\frac{T_{2}}{T_{1}} = 8[/tex]

If both the radius and frequency are doubled, then the tension is increased 8 times.

If both the radius and frequency are doubled, then the tension will be increased 8 times.

From kinematic formula:

[tex]\bold {a_r = 4\pi r^2 \times f^2 \times R^2}[/tex] .............................. (1)

Where:  

f - Frequency,    

R - Radius of rotation,  

From Second Newton's Law,

[tex]\bold {\sum F = T = m\times a_r }[/tex] ......................... (2)

Where

m is the mass of the object,

From equation 1 and 2,

[tex]\bold {T = m\times 4\pi r^2 \times f^2 \times R^2}\\[/tex] .................... (3)

From equation, tension is directly proportional to the radius and the square of frequency.

Then, if radius and frequency are doubled, then the ratio between tensions is:

[tex]\bold {\dfrac {T_2}{T_1} = (\dfrac {F_2}{F_1})^2 \times \dfrac {R_2}{R_1} = 4 \times 2 = 8 }[/tex]  

Therefore, If both the radius and frequency are doubled, then the tension will be increased 8 times.

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Answer:

a and b

water has a higher surface tension than veg oil

isopropyl alcohol boils more esier than water

Explanation:

just did the test trust me :)

A and B statement is true about the substances in this experiment.

A. Water has a higher surface tension than vegetable oil.

B. Isopropyl alcohol boils more easily than water.

A substance is a specific type of stuff with specific features. A substance is any pure compound or element. Water is a pure material and a hydrogen-oxygen combination.

A. Water has a higher surface tension than vegetable oil.

Reason:

The force operating at a border between two phases is measured as surface tension. Surface tension at liquid-air interfaces is caused by the higher attraction of liquid molecules to each other than air molecules.

Due to the relatively strong attraction of water. Hence molecules of water have high surface tension.

B.. Isopropyl alcohol boils more easily than water.

Reason:

isopropyl alcohol is a highly flammable liquid that evaporates significantly faster than water, especially when heated. The boiling point of isopropyl alcohol is lower than that of water.

Alcohol is more volatile than water. Hence Isopropyl alcohol boils more easily than water.

To learn more about the substance refer to the link;

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Answer:

The car has the greatest momentum, 160000 [kg*m/s]

Explanation:

In order to solve this problem we must remember that linear momentum is defined as the product of mass by Velocity. In this way we have the following equation

P = m*v

where:

P = lineal momemtum [kg*m/s]

m = mass [kg]

v = velocity [m/s]

Therefore we must calculate the momentum for both the truck and the car.

For the car

Pc = 2000*80

Pc = 160000 [kg*m/s]

For the Truck

Pt = 7000*20

Pt = 140000 [m/s]

The car has the greatest momentum

Answer:

ω = 0.1 rad/s

v = 0.002 m/s

Explanation:

The angular velcoity of the second hand of the clock can be found by:

ω = θ/t

where,

ω = Angular Speed

θ = Angular Displacement

t = time taken

Now, for one complete revolution of second hand of the clock:

θ = 2π rad

t = 60 s

Therefore,

ω = 2π rad/60 s

ω = 0.1 rad/s

Now, for the linear speed (V):

V = rω

where,

V = Linear Speed of Second Hand = ?

r = radius = length of second hand = 0.02 m

Therefore,

V = (0.02 m)(0.1 rad/s)

V = 0.002 m/s

It would be 8 units becuase half of 16 is 8

Answer:

88.2J

Explanation:

Given parameters:

Mass of book = 3kg

Height of shelf = 3m

Unknown:

Potential energy  = ?

Solution:

The potential energy of a body is the energy due to the position of that body.

It can be mathematically calculated as;

       P.E  = mgh

m is the mass of the body

g is the acceleration due to gravity  = 9.8m/s²

h is the height

 Now insert the parameters and solve;

        P.E  = 3 x 9.8 x 3  = 88.2J

Answer:

  39.2 m/s

Explanation:

Given:

  free-fall from rest for 4 seconds

Unknown:

  final velocity (v)

Solution:

  equation: v = at

The acceleration due to gravity is 9.8 m/s², so the velocity after 4 seconds will be ...

  v = (9.8 m/s²)(4 s) = 39.2 m/s

At the bottom of the cliff, the velocity of the ball will be 39.2 m/s.

Answer:

ITS B need more characters so yessir

Answer:

a = 6.87 [m/s²]

Explanation:

To solve this problem we must use the following equation of kinematics.

[tex]v_{f} =v_{o} +a*t[/tex]

where:

Vf = final velocity = 37 [m/s]

Vo = initial velocity = 15 [m/s]

a = acceleration [m/s²]

t = time = 3.2 [s]

Note: The positive sign in the above equation means that the velocity is increasing, due to the acceleration.

37 = 15 + a*3.2

3.2*a = 37 - 15

a = 6.87 [m/s²]