Answer:
Animal-like protists are those which cannot make their own food. These protists have the ability to move themselves and are often further subdivided into groups based on how they move. Plant-like protists are those that make their own food using sunlight and water. They can live in water or on trees.
Explanation:
Two cars approach each other from opposite directions each
with a velocity of 54 km/h. One of the cars emits a note of frequency 480 Hz. What will be the approximate frequency
heard in the other car before they cross each other?
Answer:524 Hz
Explanation:
Approximate frequency, heard in other car, when two car approaches each other, before they cross each other is 524 Hz.
What is frequency?Frequency of wave is the number of waves, which is passed thorough a particular point at a unit time.
For the two cars approaching each other the Doppler formula to find the frequency of second car is given as,
[tex]f_2=\dfrac{V_s+V_2}{V_s-V_1}f_1[/tex]
Here, [tex]V_s[/tex] is the speed of the sound.
Two cars approach each other from opposite directions.The velocity of car one is 54 km/h and the velocity of the car two is also 54 km/h.
Convert the unit of velocity of the car as,
[tex]\rm 54km/s=54\times\dfrac{5}{18}m/s\\\rm 54km/s=15m/s[/tex]
As we know that the speed of the sound is 340 m/s and one of the cars emits a note of frequency 480 Hz.
Thus, putting the values in the above formula to find out the frequency heard in the other car before they cross each other as,
[tex]f_2=\dfrac{340+15}{340-15}480\\f_2=524.3\rm Hz[/tex]
The approximate frequency heard in the other car before they cross each other is 524 Hz.
Learn more about the frequency here;
https://brainly.com/question/1436295
Can you please answer these ASAP!
I will give brainliest to the person who answers it first and it must be an actual answer,
PLZ!!
Answer:
Let's explain this briefly.
Suppose that we have a piece of ice (this is, solid water) now we give energy to the piece of ice, so the temperature of the ice increases. There is a point where the piece of ice will start a change of phase, at this point the temperature of the ice stops increasing because all the energy we give to the ice is used in the change of phase.
Once we have a complete change of phase, the temperature can increase again, and now we will have liquid water.
If we keep increasing the temperature we will see this happen again, when we have the transition from liquid to gas.
(and a similar thing happen when we have a material in a given phase and we remove heat from the material).
In the images we can see the different changes of phase of water.
1) In the first image we can see the circle in a part where the temperature is constant, so the temperature does not change in this part, which means that there is a change of phase happening.
2) Here we have the circle in a diagonal line, so here the temperature is changing, meaning that we have an increase of temperature in this region.
3) Here we want to know what the x-axis represents, this should rerpesent the energy that is being given to the material (so in some parts we see that the temperature increases and in other parts we see that the material changes of phase)
Then here the correct option is heat over time.
4) The freezing point is the temperature in which the change of phase from liquid to solid happens (or solid to liquid).
In the graph we can see that this change of phase happens at the temperature T = -210°C
Then the correct option is -210°C (The last option)
In order to know how a force will affect an object, you must know the _______________.
inertia
weight
direction
gravity
Answer:
needs to know direction
I need help. Please just help me.
Answer:
.
Explanation:
Newton discovered that sunlight was composed of colors.
True or False
Answer:
True
Newton's Rainbow. In the 1660s, English physicist and mathematician Isaac Newton began a series of experiments with sunlight and prisms. He demonstrated that clear white light was composed of seven visible colors.
Explanation:
Hope it helps
11. Find the direction of the Force
Answer:
We answer that before but I forgot
Which statement about acceleration is FALSE?
Group of answer choices
A. A car which is slowing down is accelerating
B. When acceleration and velocity are in opposite directions, acceleration is positive
C. If an object changes its direction of motion, its acceleration changes
D. A car which is speeding up is accelerating
I need help with these questions please help
25 points
Answer:
A) 0.12 m
B) 11.5 degrees
A) Two convex lenses
D) Amplitude
A) 491.8 m
B) 2.92 m
C) 9.677 MHz
I couldn't see the options for number eight, so I'm unsure if this is correct, but I got 507.7 K in my calculations.
magnetism is an example of:
A. contact force
B. non-contact force
C.friction
Answer:
The answer is Non contract force
Can someone please explain why the answer to this net torque question is +115 Nm
Answer:
Net torque in positive direction:
Fz = -450 * cos 30 deg * 1.5 = -585 N-M
Fz = 200 * 3.5 = 700 N-M
Net F = 115 N-M
Torque is generally defined as L = R X F
X cross Y = Z normal coordinate system
Note that Z will be out of the page giving the positive value for the torque.
If the radius of the Earth decreases to one fourth (1/4) its original size, what would your NEW weight become
1. 4 times as much
2.1/4 as much
3.16 times as much
4.1/16 as much
Answer:
1/4 as much
Explanation:
I don't know the explanation
Lithium an element in group 1. What element is below Lithium in the same group
Answer:
Group 1A (or IA) of the periodic table are the alkali metals: hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
Explanation:
Hope it helps! Correct me if I am wrong :>
pick the correct answer there are three correct answers
HELP URGENT WILL GIVE BRAINLIEST
Method
1. Place a trolley on a smooth runway and tilt the runway very slightly so that the
slope compensate for the friction between the wheels and the runway. If
pushed gently, the trolley should move at a constant velocity.
2. Measure the mass of the trolleys.
3. Attach the ticker timer to the trolley and thread the tape through the ticker
timer.
4. Attach a smooth pulley vertically to the bottom of the runway.
Answer:
3
Explanation:
it's too because on you measuring mass of something
if an object isn't moving the forces are acting on the object are: A. not present B. unbalanced C. balanced D. accelerated
15. If a dog pulls a 5 kg sled with a force of 70 N, what is its acceleration?
Answer:
14 m/s^2
Explanation:
We have to use the equation F=ma because the question is a Newton's second law question.
First, list known values
F (force) = 70 N
m (mass) = 5 kg
a (acceleration) = ? (we have to solve for this)
Second, plug in known values into equation.
F=ma
70=5a
Third, solve. To solve this all you have to do is divide both sides by 5
70/5=5/5a
Fourth, your answer will be 14 meters per second squared (m/s^2)
I hope this answer helps and have a great day!
What is the acceleration of a rocket ship that takes 5.0 seconds to increase its speed from 1240 m/s to 1300 m/s?
Answer:
12 m/s²
Explanation:
Acceleration = change in velocity / time
a = (1300-1240) / 5
a = 60 / 6
a = 12
Answer:
[tex]\boxed{\text{\sf \Large 12 m/s^2 $}}[/tex]
Explanation:
Use acceleration formula
[tex]\displaystyle \text{$ \sf Acceleration=\frac{Change \ in\ velocity}{Time \ taken} $}[/tex]
[tex]\displaystyle a=\frac{1300-1240}{5.0} =12[/tex]
Andres buys a new scooter. He goes 8 Km north from the beach. He then
travels 5 Km to the east. Then chases a friend 8 Km north. What distance
did he cover?
What was Andres's displacement?
Answer:
Distance: 21km
Displacement: ~16.76km
When you mix red and blue pigment, you produce the color:
orange
black
red
violet
Answer:
violet
Explanation:
What is the displacement of a person walking 20 m North, and then walks
20 meters South. *
8. Two perpendicular forces, one of 45.0 N directed upward and the other of 60.0 N directed to the
right, act simultaneously on an object with a mass of 35.0 kg. What is the magnitude of the
resultant acceleration of the object?
a) 2.14 m/s
b) 5.25 m/s
c) 3.00 m/s
d) 1.41 m/s
Answer:
[tex]a=2.14\ m/s^2[/tex]
Explanation:
Force in upward direction = 45 N
Force in right side = 60 N
Mass of the object, m = 35 kg
Net force on the object is given by :
[tex]F=\sqrt{45^2+60^2} \\F=75\ N[/tex]
We know that,
F = ma
Where
a is acceleration of the object
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{75\ N}{35\ kg}\\\\a=2.14\ m/s^2[/tex]
So, the acceleration of the object is [tex]2.14\ m/s^2[/tex].
Which phase of matter makes up stars?
Answer:
Plasma is a phase of matter that makes up stars.
A ball rolls down an inclined plane with a constant acceleration of 2.5 m/s/s. How fast is the ball traveling after 3 seconds
The mass of the hanging mass is m and the mass of the cart is M . You can assume that the floor over which the mass hangs has been chosen as the zero point of gravitational potential energy. If the hanging mass is at a height h above the floor, and has not yet been released, what type(s) of energy is/are present in the system
Answer:
Gravitational Potential Energy
Explanation:
Gravitational potential energy is energy an object possesses because of its position in a gravitational field (Hyper Physics). The potential energy is the energy that is stored in an object due to its position relative to some zero position(Physics Classroom).
For a body held at a height (h), the gravitational potential energy is capable to do work once the object is released from the height (h)
pick the correct answer
force is measured by: a) ammeter b) spring balance c) two pan balance d) ruler
Answer:
force can also be considered as weight so
Spring balance is used for measuring Force.
Explanation:
All of the following are shaped by learned behavior except __________. A. shyness B. blinking C. biting one’s nails D. angry responses
Answer:
B) Blinking .
Explanation:
An electron is traveling in the positive x direction. A uniform electric field is present and oriented in the negative z direction. If a uniform magnetic field with the appropriate magnitude and direction is simultaneously generated in the region of interest, the net force on the electron can be made to have a magnitude of zero. What must the direction of the magnetic field be?
Answer:
the fingers extended points in the negative direction of the y-axis
Explanation:
For this exercise we use the relationship of the force with the electric field
F = q E
electron charge is q = -e
F = - eE
therefore the forces are in the opposite direction to the electric field direction, which indicates that it goes towards the negative side of the Z axis.
Consequently the electric force is in the positive direction of the z axis
us the direction of the magnetic field so that it cancels out the electric forces.
For the direction of the magnetic force we use the right hand rule. The thumb points in the direction of the speed, the fingers extended in the direction of the magnetic field and the palm in the direction of the Force if the charge is positive, if the charge is negative it is in the opposite direction
In this case we want the magnetic force to be directed in the negative direction of the z axis.
The charge moves in the positive direction of the x-axis
the palm must point in the negative directional of the Z axis, ie the negative charge
therefore the fingers extended points in the negative direction of the y-axis
is the force on a dropped ball.
Ogravity
O acceleration
Answer:
The force applied to any falling object would be gravity. An object cannot fall if there is not gravity; it would simply float.